Last updated: February 24, 2025
In January, National Harbor, United States experiences a diverse climate characterized by temperatures ranging from a chilly -14°C (7°F) to a balmy 22°C (71°F). The average temperature hovers around 3°C (38°F), making it the coldest month of the year. This period is marked by moderate precipitation, totaling 61 mm (2.4 in) over the course of 7 days, contributing to the area's high humidity level of 84%. January weather in National Harbor offers a unique blend of winter beauty and brisk air, providing a refreshing yet invigorating start to the year.
January in National Harbor is characterized by a dramatic temperature range, with minimums dipping to a brisk -14°C (7°F) and daytime highs reaching a surprisingly warm 22°C (71°F). This month serves as a transition period; the average temperature settles around 3°C (38°F), indicating a cold start to the year. As January closes, residents can expect temperatures to rise, setting the stage for the milder conditions of February, where averages increase slightly to 5°C (42°F), while extremes rise even higher. The gradual warming trend through the early months of the year hints at the upcoming spring, fostering anticipation as the landscape shifts from winter's chill to more temperate days ahead.
In January, National Harbor experiences a relatively moderate level of precipitation, totaling 61 mm (2.4 in) over 7 days. This amount sets the tone for the month, with rain being less frequent compared to the wetter months ahead. As the year progresses, February sees a noticeable increase, with precipitation rising to 96 mm (3.8 in) and the number of rain days climbing to 11. The trend continues with April and July experiencing the heaviest rainfall, reaching 102 mm (4.0 in) and 132 mm (5.2 in), respectively. Interestingly, summer months such as August also report substantial rainfall at 146 mm (5.7 in), hinting at a wet and warm season. In contrast, the fall months witness a decrease, with November and December showing a decline in both precipitation levels and rainy days. Overall, January lays the groundwork for a wet year, with precipitation steadily building as we move into spring and summer.
In January, National Harbor experiences a high humidity level of 84%, setting the tone for a relatively damp winter. This trend continues into February and March, where humidity remains consistent at 83%, illustrating a persistent touch of moisture in the air. As the seasons transition towards spring in April, humidity dips slightly to 81%, offering a breath of fresh air. However, the rise in temperatures during May and June sees humidity maintaining a moderate range around 78-79%. The summer months of July and August bring the lowest humidity levels at 74% and 72%, respectively, allowing for more comfortable outdoor activities. As autumn arrives, humidity begins to climb again, peaking at 85% in November before settling back to 84% in December. This cycle highlights the subtle ebb and flow of moisture in the region, creating a distinctive climate pattern that characterizes National Harbor throughout the year.
In January, National Harbor experiences a moderate UV Index of 3, with a burn time of just 30 minutes under the sun. As the months progress, there's a notable increase in UV exposure, peaking in the summer, where from May to July, the UV Index reaches a staggering 10, indicating very high levels of risk and a significantly reduced burn time of only 15 minutes. Interestingly, the trend tapers off in the later months, with October's index dropping back to 7, and both November and December returning to a moderate UV Index of 5 and 3, respectively. This seasonal variation highlights the importance of sun safety throughout the year, making it essential to stay informed. For more detailed insights, check out National Harbor UV Index.
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In National Harbor, January marks the beginning of the year with a modest 153 hours of sunshine, setting the stage for a steady increase as the months progress. February sees a subtle rise to 180 hours, hinting at the approaching spring. By March and April, the days grow noticeably longer, each offering 259 hours of vibrant sunlight, invigorating the area. The trend continues into May with 286 hours, peaking in June at an impressive 331 hours, as summer embraces the region with warmth and brightness. Even in July, the sun shines generously for 357 hours, while August slightly dips to 321 hours, still basking in ample daylight. As the year transitions into fall, sunshine hours gradually decline, but the 276 hours in September and 249 hours in October continue to provide a pleasant glow. By November and December, the days shorten with 226 and 190 hours respectively, as the winter months approach. This annual cycle reveals a captivating rhythm of light, celebrating the curves of sunshine that enrich the National Harbor experience.
In January, National Harbor enjoys a 46% chance of sunny weather, which sets a promising tone for the year ahead. While this likelihood dips to 29% in February, it quickly rebounds as spring approaches, with March boasting a 52% chance of sunshine. This trend of fluctuating sun probabilities continues into the early months, with April and May showing 49% and 40% respectively, before dipping again in the summer months. Notably, the fall months present a different pattern, as September climbs to a 55% chance of sun, peaking towards the end of the year when November holds a 58% chance, making it an appealing time for outdoor activities. Overall, January's moderate sunshine chance signals the beginning of a refreshing seasonal transition that hints at brighter days to come.
In January, National Harbor experiences approximately 9 hours of daylight, marking the start of the year with shorter days. As winter progresses into February, daylight increases to 10 hours, subtly hinting at the approaching spring. The trend continues upward in March, with 11 hours of daylight, as the days lengthen further. April brings a noticeable jump to 13 hours, ushering in the delights of spring. May and June maintain this momentum, both showcasing 14 hours of daylight, perfect for outdoor activities. As summer rolls on into July, daylight remains steady at 14 hours, enabling long, sun-filled days. However, by August, sunlight begins to wane slightly, dropping to 13 hours, followed by further reductions in September (12 hours) and October (11 hours). The cycle completes as November and December return to 10 and 9 hours, respectively, closing the year with the familiar rhythm of nature’s seasons. This natural ebb and flow of daylight not only marks the passage of time but also enriches the experience of each season in National Harbor.
In National Harbor, January greets visitors with a gentle breeze, boasting an average wind speed of 2.9 m/s (7 mph). This serene wind carries through the winter months, with February, March, and April maintaining a similar tempo, all clocking in at 3.2 m/s (7 mph). As spring unfolds, wind speeds slightly dip in May to 2.8 m/s (6 mph), continuing a slow descent through the summer months, which see July at a calm 2.3 m/s (5 mph). The latter part of the year whispers a return to steadier currents, with September and October averaging around 2.5 m/s (6 mph). By November, the winds pick up again to 2.9 m/s (6 mph), creating a comforting rhythm that echoes through the seasons. The data reveals a clear trend: while winter invites a brisk start, the summer months soften the winds, only to see a resurgence as the year closes out.
The weather in National Harbor changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January'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.
In comparing the weather between January and February, January tends to be slightly cooler, with an average temperature of 3°C (38°F) compared to February's average of 5°C (42°F). Both months see minimum temperatures dip to -14°C (7°F), but February can reach a warmer maximum of 27°C (81°F), compared to January's peak of 22°C (71°F). Precipitation levels also increase in February, with 96 mm (3.8 in) accumulating over 11 days, while January recorded 61 mm (2.4 in) over 7 days. Despite a slight drop in humidity, remaining at 83% in February compared to January's 84%, the overall trend suggests a gradual warming and wetter conditions as winter progresses. For a detailed overview, you can visit National Harbor weather in February.
In January, temperatures can dip as low as -14°C (7°F) with an average around 3°C (38°F), reaching a maximum of 22°C (71°F). The month experiences about 61 mm (2.4 in) of precipitation over 7 days, contributing to a high humidity level of 84%. In contrast, March sees milder temperatures, with a minimum of -6°C (22°F) and an average of 8°C (47°F), peaking at 29°C (84°F). The precipitation increases slightly to 82 mm (3.2 in) over 9 days, maintaining a similar humidity of 83%. For more detailed weather information, you can check out National Harbor weather in March.
January and April present a stark contrast in weather conditions. January sees much colder temperatures, with a minimum reaching as low as -14°C (7°F) and an average of just 3°C (38°F). In this month, precipitation is relatively moderate at 61 mm (2.4 in), falling over seven days and accompanied by high humidity of 84%. In sharp contrast, April enjoys a milder climate, where the minimum temperature only drops to -1°C (31°F) while the average rises to a pleasant 14°C (58°F), and maximums can soar up to 33°C (92°F). Moreover, April experiences more precipitation at 102 mm (4.0 in) over eleven days, with slightly lower humidity at 81%. For those interested in detailed weather conditions, you can check National Harbor weather in April.
In January, the weather is characterized by its significant chill, with temperatures ranging from a frigid minimum of -14°C (7°F) to an average of 3°C (38°F), and only occasionally peaking at 22°C (71°F). The month sees an average of 61 mm (2.4 in) of precipitation spread over about 7 days, coupled with a high humidity level of 84%, making the cold feel even more biting. In contrast, May ushers in a more temperate climate, with temperatures rising to a comfortable average of 19°C (67°F), and a maximum that can reach up to 35°C (95°F). Although it experiences increased precipitation of 121 mm (4.8 in) over approximately 12 days, the humidity decreases to 78%, leading to a pleasant spring atmosphere. For more detailed information, check out National Harbor weather in May.
January and June present stark contrasts in weather patterns. In January, temperatures can dip as low as -14°C (7°F), with an average around 3°C (38°F), and highs reaching up to 22°C (71°F). The month experiences 61 mm (2.4 in) of precipitation over approximately 7 days, coupled with a high humidity level of 84%. In contrast, June boasts a much warmer climate, with minimum temperatures starting at 9°C (49°F) and reaching an average of 24°C (76°F), peaking at 37°C (98°F). Rainfall increases to 107 mm (4.2 in) over 13 days, while humidity lowers slightly to 79%. For more details on the pleasant June weather, you can check National Harbor weather in June.
The weather in January contrasts sharply with that of July, showcasing the stark seasonal differences. In January, temperatures can drop as low as -14°C (7°F), with an average of 3°C (38°F) and a maximum of 22°C (71°F), accompanied by high humidity at 84%. This month also experiences about 61 mm (2.4 in) of precipitation over approximately 7 days. In contrast, July brings significantly warmer conditions, with minimum temperatures around 16°C (61°F), average highs of 27°C (81°F), and peaks reaching 38°C (102°F). The humidity drops to 74%, and precipitation increases to 132 mm (5.2 in) across 12 days. For more details on July weather in this region, you can check National Harbor weather in July.
January and August present strikingly contrasting weather conditions. In January, temperatures can plummet to a minimum of -14°C (7°F), with an average of 3°C (38°F) and a maximum of 22°C (71°F). The month is characterized by high humidity at 84% and about 61 mm (2.4 in) of precipitation over 7 days. Conversely, August showcases a significantly warmer climate with minimum temperatures starting at 15°C (59°F) and reaching an average of 25°C (78°F) and a peak of 37°C (99°F). Precipitation rises to 146 mm (5.7 in) across 15 days, yet humidity decreases to a more manageable 72%. For more detailed insights on August weather, you can check National Harbor weather in August.
January weather is characterized by cold temperatures, with lows dipping as low as -14°C (7°F) and an average temperature around 3°C (38°F), making it one of the coldest months of the year. In contrast, September brings a significant warm-up, with temperatures ranging from a minimum of 6°C (44°F) to a peak of 37°C (99°F) and an average of 22°C (73°F). While January experiences higher humidity at 84% and less precipitation over 7 days, September sees slightly lower humidity at 75% but more frequent rain, totaling 11 days and 93 mm of precipitation. For more details on the weather during this month, you can check out National Harbor weather in September.
The comparison between January and October weather reveals notable differences in both temperature and precipitation. In January, temperatures can drop as low as -14°C (7°F), while averaging around 3°C (38°F) with a maximum of 22°C (71°F). The month experiences about 61 mm (2.4 in) of precipitation over 7 days, accompanied by high humidity levels at 84%.
In contrast, October presents a much milder climate, with temperatures ranging from a minimum of 2°C (36°F) to an average of 17°C (63°F), peaking at 36°C (97°F). This month sees increased precipitation at 105 mm (4.2 in) over 9 days, while humidity decreases slightly to 81%. For more detailed weather patterns, check out National Harbor weather in October.
January and November exhibit distinct weather patterns, with January generally colder than November. In January, temperatures can dip as low as -14°C (7°F) with an average of 3°C (38°F), while November's temperatures range from a minimum of -5°C (23°F) to an average of 9°C (48°F). Additionally, November tends to be slightly wetter, accumulating 77 mm (3.0 in) of precipitation compared to January's 61 mm (2.4 in), although both months see precipitation over 7 days. Humidity levels remain similar, with January at 84% and November at 85%. For more information on November’s weather, you can check National Harbor weather in November.
In comparing the weather of January and December, we find that both months exhibit similar humidity levels at 84%, but January tends to be slightly colder. January's minimum temperature reaches -14°C (7°F) compared to December's -10°C (14°F), while the average temperatures are also lower in January at 3°C (38°F) versus December's 5°C (42°F). Moreover, January experiences a maximum of 22°C (71°F), which is slightly higher than December's maximum of 20°C (69°F). Precipitation is also noteworthy, with January receiving 61 mm (2.4 in) over 7 days, while December sees a higher total of 89 mm (3.5 in) across 9 days. For more details on December weather, you can visit National Harbor weather in December.
As winter settles in, January at National Harbor presents a unique blend of chilly temperatures and increased precipitation compared to the milder months of autumn and spring. With average lows lingering near 3°C (38°F), the brisk air often contrasts sharply with the warmer summer months, where temperatures can soar. During this month, expect about seven days of rain, leading to a humidity level around 84%, making the atmosphere feel quite crisp. Whether you're bundled up exploring the winter landscapes or enjoying indoor attractions, January offers a distinctly invigorating experience. For more insights into year-round weather patterns, check out the full details at National Harbor Climate.