October Weather in National Harbor, United States

Last updated: February 24, 2025

October in National Harbor, United States, showcases a dynamic climate as temperatures fluctuate significantly, reaching a maximum of 36°C (97°F) and dropping to a chilly minimum of 2°C (36°F). The average temperature settles around 17°C (63°F), providing a comfortable ambiance for outdoor activities. However, this month also sees substantial precipitation, with a total of 105 mm (4.2 in) recorded over 9 days, contributing to a high humidity level of 81%. Visitors can expect a blend of warm days and crisp evenings, making October an intriguing time to experience the beauty of National Harbor.

October Temperature in National Harbor

In October, National Harbor experiences a delightful transition into autumn, characterized by a significant drop in nighttime temperatures, with minimums settling around 2°C (36°F). The days, however, remain pleasantly mild, boasting an average of 17°C (63°F) and reaching highs of 36°C (97°F). This month serves as a bridge between the sweltering summer heat and the cooler months ahead, inviting visitors to enjoy the crisp air and vibrant fall foliage. Compared to September, which carries lingering warmth with averages around 22°C (73°F), October marks a notable cool down, providing the ideal backdrop for outdoor activities and fall celebrations. Whether it's taking a scenic stroll along the waterfront or indulging in seasonal treats, October is a pivotal month that showcases the charm of National Harbor as it embraces the colors and cooler temperatures of the fall season.

October Weather in National Harbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in National Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec374247576776817872634841
Data source: Temperature data for National Harbor generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in National Harbor

In October, National Harbor experiences a moderate level of rainfall, with an average precipitation of 105 mm (4.2 in) over approximately 9 days. This amount showcases a slight decrease from the heavier downpours typical of the summer months, where July and August see the highest recorded precipitation. As autumn settles in, the rainfall contributes to the region's vibrant fall foliage, with the cooler temperatures and changing leaves creating a picturesque backdrop. Interestingly, October’s precipitation is consistent with September's 93 mm (3.7 in), reflecting a transition period in weather patterns as the region prepares for the drier months ahead. Overall, October’s rain serves as a crucial reminder of the changing seasons, striking a balance between the lingering warmth of summer and the brisk chill of winter.

October Precipitation Trends in National Harbor

The chart displays monthly precipitation patterns in National Harbor, with values for each month alongside October's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec619682102121108132146931057789
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in National Harbor

As October arrives in National Harbor, the humidity experiences a notable shift, settling at 81%, a slight uptick from the summer months. This transition signals the end of the drier spell seen in July and August, which recorded their lowest levels at 74% and 72%, respectively. As autumn unfolds, humidity begins to climb again, reminiscent of earlier months, with November expected to reach its annual peak at 85%. This pattern highlights a comfortable yet moist atmosphere as the region moves toward winter, offering a refreshing change from the heat of summer while still maintaining a consistent level of humidity throughout the fall season.

October Average Humidity in National Harbor

This chart illustrates the average monthly humidity levels in National Harbor, with October's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how October's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in National Harbor

As October rolls into National Harbor, the UV Index registers a moderate level of 7, indicating that while sun protection is still necessary, the risk of harm from unprotected sun exposure is slightly lower than the scorching summer months. The decreasing trend from the peak UV Index of 10 observed from May to July reflects the seasonal shift towards milder sunlight, allowing for a burn time of 25 minutes before the skin becomes susceptible to damage. With September at an 8 and August at a 9, this gradual decline underscores the importance of being aware of UV levels as the weather cools. To ensure safety, it's essential to be mindful of these changes and take appropriate precautions. For more details, check the full report on the National Harbor UV Index.

Maximum UV Index Levels in National Harbor for October

The chart shows the monthly maximum UV Index (UVI) for National Harbor in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: National Harbor October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

October Sunshine in National Harbor

As October unfolds in National Harbor, the region basks in 249 hours of sunshine, a pleasant continuation of the warm, sunlit days experienced throughout the summer. Following a peak of 357 hours in July, sunshine begins to gracefully taper off, with September still holding on to 276 hours before the fall season fully settles in. This gradual decline reflects a transition from the long, vibrant days of summer to the crisper, shorter days of late autumn. Despite the decrease, October’s sun still offers a welcoming glow, inviting locals and visitors alike to enjoy the beautiful scenery and crisp air, a perfect backdrop for picturesque autumn activities. As daylight hours shrink, the charm of the shifting seasons continues to captivate, promising a breathtaking autumn in this vibrant locale.

Monthly Sunshine Duration in National Harbor: October Highlighted

The October sunshine duration represents the total number of hours National Harbor experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec153h180h259h259h286h331h357h321h276h249h226h190h
Data source: National Harbor October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in National Harbor During October

In October, National Harbor experiences a 41% chance of sunny weather, a figure that reflects a moderate likelihood of clear skies as the region transitions into fall. This percentage places October in the middle range compared to other months, with September boasting a higher 55% chance of sunshine—a testament to summer's lingering warmth. Unlike the winter months, which often see chances dip, October maintains a relatively favorable prospect of sunny days, better than both June and August, suggesting that visitors can still enjoy the beauty of fall's vibrant colors under the sun. As the year progresses, a noticeable upward trend in sunny probabilities can be seen moving into November, which peaks at 58%, indicating that while October may not be the sunniest month, it certainly holds its own in offering pleasant weather.

Percentage of Sunny Days in October in National Harbor

The chart illustrates the percentage of sunny days in National Harbor throughout the year, with October highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often National Harbor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec46%29%52%49%40%39%49%35%55%41%58%39%
Data source: National Harbor October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in National Harbor in October

As autumn settles in National Harbor, October brings a modest reduction in daylight, offering about 11 hours of sunlight each day. This shift marks a gradual decline following the peak of summer, where residents enjoyed up to 14 hours of daylight from June to August. The transition into October hints at the shorter days ahead, with daylight gradually diminishing as the year progresses. From 14 hours in midsummer to 11 hours in October, the changing lengths of days paint a vivid picture of the seasonal cycle, inviting locals and visitors alike to savor the rich colors and crisp air that autumn offers before the days grow even shorter.

Average Daylight Hours in National Harbor for October

The chart illustrates the variation in daylight duration in National Harbor throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 47m10h 45m11h 58m13h 14m14h 18m14h 49m14h 32m13h 35m12h 23m11h 8m10h 2m9h 29m
Data source: National Harbor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in National Harbor

As October unfolds in National Harbor, the gentle whisper of wind begins to carry the crispness of fall, with an average speed of 2.7 m/s (6 mph). This slight uptick from the summer months, where winds dipped to a calm 1.9 m/s (4 mph) in August, presents a refreshing change. The trend of increasing wind speeds as we transition into autumn suggests a gentle reawakening, following the quieter summer breezes. Interestingly, October's winds are notably comparable to those in November and December, which hover around 2.9 m/s (6 mph) and 2.8 m/s (6 mph) respectively. This consistent pattern hints at the seasonal shift, inviting both residents and visitors to embrace the outdoors as the landscape transforms in vibrant hues.

Average October Wind Speed in National Harbor

The chart displays monthly wind speed patterns in National Harbor, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.23.23.22.82.52.31.92.52.7 m/s2.92.8
Data source: National Harbor October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in National Harbor Compares to Other Months

The weather in National Harbor changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in National Harbor and find detailed weather information for every month.

October and January present stark contrasts in weather conditions. October boasts a broad temperature range, with minimums around 2°C (36°F) and maximums reaching up to 36°C (97°F), creating a warm and humid atmosphere with an average of 17°C (63°F) and a significant rainfall of 105 mm over 9 days. In contrast, January showcases a much colder climate, with minimum temperatures plummeting to -14°C (7°F) and an average temperature of just 3°C (38°F). Precipitation is less frequent, totaling 61 mm over 7 days, while humidity remains slightly higher at 84%. For a detailed look at weather patterns in January, visit National Harbor weather in January.

October and February showcase strikingly different weather patterns. In October, temperatures can range from a chilly 2°C (36°F) to a warm 36°C (97°F), with an average of 17°C (63°F). The month sees around 105 mm (4.2 in) of precipitation over 9 days, coupled with a high humidity level of 81%. In contrast, February experiences much colder temperatures, with a minimum of -14°C (7°F) and a maximum of 27°C (81°F), averaging just 5°C (42°F). Although precipitation is slightly less at 96 mm (3.8 in) across 11 days, the humidity remains fairly high at 83%. For more detailed insights into February weather, check out National Harbor weather in February.

When comparing the weather in October and March, notable differences emerge. In October, the temperatures range from a minimum of 2°C (36°F) to a maximum of 36°C (97°F), with an average of 17°C (63°F), while March experiences colder temperatures, with a minimum of -6°C (22°F) and a maximum of 29°C (84°F), averaging at 8°C (47°F). Both months see similar precipitation patterns, each with about 9 days of rainfall; however, October has a higher total precipitation of 105 mm (4.2 in) compared to March's 82 mm (3.2 in). Humidity levels remain comparable, with October at 81% and March slightly higher at 83%. For a further look at March weather specifics, you can visit National Harbor weather in March.

October and April present contrasting yet somewhat similar weather patterns. In October, temperatures range from a chilly 2°C (36°F) at night to a warm 36°C (97°F) during the day, with an average of 17°C (63°F). The month typically sees about 105 mm (4.2 in) of precipitation over 9 days, maintaining a humidity level of 81%. In comparison, April features cooler minimum temperatures, dipping to -1°C (31°F), with a slightly lower average of 14°C (58°F) and a maximum of 33°C (92°F). The precipitation is similar, totaling around 102 mm (4.0 in) over 11 days, while humidity remains at 81%. For more detailed insights into April weather, visit National Harbor weather in April.

October and May present distinct weather patterns. In October, the temperatures range from a minimum of 2°C (36°F) to a maximum of 36°C (97°F), with an average of 17°C (63°F). The month sees about 105 mm (4.2 in) of rainfall across 9 days and maintains a relatively high humidity level of 81%. In contrast, May offers slightly milder temperatures, ranging from a minimum of 3°C (37°F) to a maximum of 35°C (95°F), with an average of 19°C (67°F). Precipitation in May totals approximately 121 mm (4.8 in) over 12 days, accompanied by a lower humidity of 78%. For a deeper look at the May weather, you can check National Harbor weather in May.

In comparing the weather of October and June, one can notice distinct differences in temperature and precipitation patterns. October experiences a wider temperature range, with minimum temperatures dipping to around 2°C (36°F) and averages of 17°C (63°F), while June boasts milder nights with lows around 9°C (49°F) and more comfortable average temperatures of 24°C (76°F). Both months have similar precipitation levels, approximately 105 mm (4.2 in) in October and 107 mm (4.2 in) in June, but June tends to see rainfall over more days, totaling 13 days compared to October's 9 days. Humidity is relatively high in both months, with October at 81% and June slightly lower at 79%. For a detailed look at June weather specifics, check out National Harbor weather in June.

When comparing the weather in October to that of July, we see distinct differences in temperature and humidity levels. October experiences a wider range of temperatures, with minimums dropping to 2°C (36°F) and maximums reaching up to 36°C (97°F), while the average is a milder 17°C (63°F). In contrast, July maintains warmer averages, with minimums around 16°C (61°F) and maximum temperatures peaking at 38°C (102°F), averaging 27°C (81°F). Precipitation is slightly higher in July, totaling 132 mm over 12 days, compared to October's 105 mm over 9 days. Additionally, October tends to be more humid, with humidity levels around 81%, compared to July’s 74%. For more details on July’s weather, you can check out National Harbor weather in July.

October weather contrasts significantly with that of August. While October experiences a broader temperature range, with minimums dropping to 2°C (36°F) and maxing out at 36°C (97°F), August maintains a warmer average temperature of 25°C (78°F) and typically ranges from 15°C (59°F) to 37°C (99°F). Precipitation in October is slightly lower than in August, with 105 mm (4.2 in) over 9 days compared to August's 146 mm (5.7 in) spread across 15 days. Additionally, October's higher humidity at 81% offers a more muggy feel compared to the 72% humidity often seen in August. For a more detailed view of conditions during August, check out National Harbor weather in August.

In comparing the weather of October and September, we see a notable shift in temperature and precipitation patterns. October experiences a wider temperature range, with minimums dropping to 2°C (36°F) and average highs around 17°C (63°F), while September tends to be warmer, averaging 22°C (73°F) with maximums reaching up to 37°C (99°F). Precipitation in October is slightly higher at 105 mm (4.2 in) over 9 days, compared to September's 93 mm (3.7 in) over 11 days. Additionally, October has a higher humidity level at 81% versus September's 75%, contributing to a more muggy atmosphere. For more in-depth details, you can check National Harbor weather in September.

October and November showcase a notable shift in weather patterns. In October, temperatures range from a minimum of 2°C (36°F) to a maximum of 36°C (97°F), with an average of 17°C (63°F), along with relatively high humidity at 81% and 105 mm (4.2 in) of precipitation over 9 days. In contrast, November experiences cooler temperatures, with a minimum of -5°C (23°F) and an average of 9°C (48°F), while the maximum reaches 26°C (78°F). Precipitation decreases to 77 mm (3.0 in) over just 7 days, and humidity rises slightly to 85%. For a closer look at November's weather specifics, you can refer to National Harbor weather in November.

October and December present contrasting weather conditions, reflecting the shift from fall to winter. In October, temperatures range from a mild 2°C (36°F) at night to a warm 36°C (97°F) during the day, with an average of 17°C (63°F), along with significant humidity at 81%. The month experiences about 105 mm (4.2 in) of precipitation spread over nine days. In contrast, December brings much colder temperatures, with a minimum of -10°C (14°F) and a maximum of 20°C (69°F), averaging only 5°C (42°F). Precipitation reduces slightly to 89 mm (3.5 in) over the same number of rainy days, while humidity rises to 84%. For a detailed look at weather specifics in December, you can check National Harbor weather in December.

Compare National Harbor's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in National Harbor

In October, National Harbor experiences a transition into cooler weather, with average temperatures dropping significantly from the summer highs. The month is marked by an increased likelihood of precipitation, with about nine days of rainfall contributing to higher humidity levels, making the air feel a bit damp. This shift not only brings a refreshing chill but also enhances the vibrant fall foliage, transforming the landscape into a picturesque setting. As the heat of the summer fades, October offers a unique blend of cool breezes and seasonal beauty, creating an inviting atmosphere for outdoor activities. For a detailed overview of what to expect throughout the year, visit National Harbor Climate.