September Weather in Mount Olympus, United States

Last updated: February 24, 2025

In September, Mount Olympus in the United States experiences a diverse climate, with temperature swings reflecting the approach of autumn. The maximum temperature can rise to a warm 33°C (93°F), while the average settles at a comfortable 16°C (62°F). Nighttime temperatures may drop dramatically to a chilly -4°C (25°F), showcasing the region’s variable weather. Throughout the month, the area sees 39 mm (1.5 in) of precipitation over 5 days, fostering a refreshing atmosphere amidst the 46% humidity. This combination of warmth during the day and cool nights might entice outdoor enthusiasts seeking to explore the natural beauty of Mount Olympus.

September Temperature in Mount Olympus

As September unfolds in Mount Olympus, the temperatures begin to showcase a transition from the warmth of summer to the cooler embrace of autumn. With a minimum temperature dipping to -4°C (25°F) and an average of 16°C (62°F), the onset of fall becomes palpable. The maximum temperatures peak at a still pleasant 33°C (93°F), offering a final taste of summer's warmth before the chill sets in. This month marks a significant shift; compared to the sweltering heights of August, where temperatures soared to 36°C (96°F), September’s averages reflect a balance that hints at the changing seasons, inviting both locals and visitors to enjoy the crisp air and vibrant changing foliage.

September Weather in Mount Olympus: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mount Olympus, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec262837425165747161453526
Data source: Temperature data for Mount Olympus 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.

September Precipitation in Mount Olympus

In September, Mount Olympus experiences a noticeable uptick in precipitation, with 39 mm (1.5 in) of rain over 5 days. This marks a shift from the drier summer months, particularly July and August, which recorded only 19 mm (0.8 in) and 26 mm (1.0 in) of precipitation, respectively. While September is still relatively mild compared to the wetter months of January and February, it lays the groundwork for the approaching autumn season, where rainfall begins to increase again. As the year progresses into October and November, the region prepares for a more substantial average rainfall, indicating a transition from the arid summer to the lush, wet months ahead. This cyclical pattern highlights Mount Olympus as a place where weather conditions steadily evolve, reflecting the changing seasons.

September Precipitation Trends in Mount Olympus

The chart displays monthly precipitation patterns in Mount Olympus, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec727973746924192639514863
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mount Olympus

As summer fades into autumn, September in Mount Olympus, United States, brings a moderate humidity level of 46%. This marks a slight increase from the drier months of July and August, which recorded their lowest humidity levels at 44% and 37% respectively. The trend reveals a gradual shift as the air begins to retain more moisture, paving the way for the wetter months ahead. Following September, humidity levels rise sharply in October, reaching 67%, and continue to surge as winter approaches, reflecting a broader seasonal pattern. The transition underscores the region's characteristic fluctuation in humidity, with the contrast between the sultry summer and the damp fall setting the stage for changing weather dynamics.

September Average Humidity in Mount Olympus

This chart illustrates the average monthly humidity levels in Mount Olympus, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mount Olympus

As summer fades into autumn, September in Mount Olympus, United States, experiences a notable decrease in UV intensity, with a UV Index of 9 categorized as very high. This shift reflects a slight dip from the extreme levels seen over the summer months, where July and June reached peaks of 12. Despite the moderation, September’s burn time settles at 15 minutes, indicating that sun protection remains crucial as outdoor activities transition into the fall season. This pattern exemplifies a general trend of diminishing UV exposure as the year progresses, moving from moderate levels in January to the stark extremes of late spring and summer. To stay informed on UV trends year-round, check out Mount Olympus UV Index.

Maximum UV Index Levels in Mount Olympus for September

The chart shows the monthly maximum UV Index (UVI) for Mount Olympus in September, 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.
JanFebMarAprMayJunJulAugSepOctNovDec46811111212119653
Data source: Mount Olympus September 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.

September Sunshine in Mount Olympus

As summer begins to wane, September in Mount Olympus shines brightly with 313 hours of sunlight, marking a subtle decline from the peak of 392 hours in July. This month serves as a beautiful transition, showcasing a rich tapestry of warm golden hues as the vibrant summer days gradually give way to the crispness of autumn. With sunlight levels still robust, the days are long enough for outdoor adventures, making it a prime time for hiking and enjoying the breathtaking scenery. As the temperatures cool, the smiles on faces linger under the warm rays, a reminder of the long, sun-soaked months just passed, while hinting at the cozy change ahead.

Monthly Sunshine Duration in Mount Olympus: September Highlighted

The September sunshine duration represents the total number of hours Mount Olympus experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec153h200h261h296h362h385h392h361h313h269h217h196h
Data source: Mount Olympus September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mount Olympus During September

As September rolls in, Mount Olympus enjoys a remarkable streak of sunny weather, boasting a 76% chance of sunshine that mirrors the pleasant conditions of August. This solid percentage highlights a significant trend in the region's climate; from the start of the year, there's a noticeable upward trajectory in sunny days, reaching a peak during the late summer months. Following the warmer summer, September continues this pattern, promising visitors and residents alike ample opportunities to bask in the beauty of the outdoors. As the fall months approach, the likelihood of sun will gradually wane, but for now, September stands out as a golden opportunity for sun-seekers.

Percentage of Sunny Days in September in Mount Olympus

The chart illustrates the percentage of sunny days in Mount Olympus throughout the year, with September 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 Mount Olympus experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%37%49%60%56%66%59%77%76%42%47%39%
Data source: Mount Olympus September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mount Olympus in September

As September unfolds in Mount Olympus, the daylight duration begins its gentle decline, offering approximately 12 hours of light each day. This marks a shift from the peak brightness of 15 hours in June, gradually tapering off as autumn approaches. The trend reflects a natural rhythm, where summer's abundant sunshine yields to the cooler, shorter days of fall. Following September, daylight continues to decrease, with October dropping to 11 hours before falling back to the 9 hours characteristic of winter months. This seasonal transition not only enhances the charm of the landscape but also ushers in the rich hues of fall foliage, setting the stage for the cozy months ahead.

Average Daylight Hours in Mount Olympus for September

The chart illustrates the variation in daylight duration in Mount Olympus throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 37m10h 39m11h 58m13h 19m14h 27m15h 1m14h 42m13h 41m12h 24m11h 3m9h 53m9h 17m
Data source: Mount Olympus daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Mount Olympus

As September ushers in the transitional beauty of fall in Mount Olympus, the average wind speed experiences a gentle shift, clocking in at 2.1 m/s (5 mph). This slight uptick from previous months illustrates a consistent trend of mild breezes prevalent from late summer through early autumn. Interestingly, while the wind speeds slightly dip in July and November, they remain notably stable during September and the ensuing months, hovering around the 2.1 m/s mark. This stability creates a refreshing atmosphere, perfect for enjoying outdoor activities amid the vibrant changing leaves, making September a delightful time to embrace the serene winds of Mount Olympus.

Average September Wind Speed in Mount Olympus

The chart displays monthly wind speed patterns in Mount Olympus, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.82.02.02.02.12.31.92.22.1 m/s2.11.62.3
Data source: Mount Olympus September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Mount Olympus Compares to Other Months

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

September and January present starkly contrasting weather conditions. In September, temperatures can range from a brisk -4°C (25°F) at night to a warm 33°C (93°F) during the day, with an average of 16°C (62°F). The month sees relatively low precipitation, totaling 39 mm (1.5 in) over about 5 days, and humidity levels hover around 46%. In contrast, January experiences much colder temperatures, with minimums plunging to -21°C (-5°F) and an average of -3°C (26°F). The month is also wetter, recording 72 mm (2.8 in) of precipitation over 11 days, coupled with high humidity at 91%. For a closer look at January conditions, you can visit Mount Olympus weather in January.

September and February present contrasting weather patterns. In September, temperatures range from a chilly -4°C (25°F) to a warm 33°C (93°F), with an average of 16°C (62°F), making it a month of transitions as summer begins to fade. The precipitation is relatively light, totaling 39 mm (1.5 in) over just 5 days, and humidity sits at a moderate 46%. In stark contrast, February experiences much colder temperatures, with a minimum of -21°C (-5°F) and an average of -2°C (29°F), peaking at 14°C (58°F). This month is significantly wetter, with precipitation reaching 79 mm (3.1 in) spread over 14 days, and a high humidity level of 92%. For more detailed insights, you can refer to Mount Olympus weather in February.

September and March present markedly different weather conditions, with September enjoying a warmer climate overall. In September, temperatures range from a chilly -4°C (25°F) at the lowest to a comfortable max of 33°C (93°F), averaging around 16°C (62°F). In contrast, March showcases significantly cooler temperatures, with a minimum of -18°C (0°F) and a maximum of 19°C (66°F), averaging just 3°C (37°F). Precipitation is also more prevalent in March, with 72 mm (2.9 in) falling over 12 days, compared to September's 39 mm (1.5 in) over 5 days. Additionally, March experiences higher humidity levels at 84%, while September has a more moderate 46%. For more details on March weather, you can refer to Mount Olympus weather in March.

When comparing the weather in September and April, significant differences emerge. September generally boasts a wider temperature range, with minimums around -4°C (25°F) and maximums reaching up to 33°C (93°F), leading to an average of 16°C (62°F). In contrast, April features much cooler temperatures, ranging from a low of -10°C (15°F) to a high of 22°C (72°F), resulting in a lower average of 5°C (42°F). Additionally, precipitation is more frequent in April, with a total of 74 mm (2.9 in) falling over 11 days, compared to September’s 39 mm (1.5 in) across just 5 days. The humidity in April is also notably higher at 74%, compared to September's 46%. For more specific details, you can check Mount Olympus weather in April.

In comparing the weather of September and May, September typically showcases a wider temperature range, with minimums around -4°C (25°F) and maximums reaching up to 33°C (93°F). In contrast, May tends to be cooler, starting at a minimum of -6°C (22°F) and peaking at 30°C (87°F). Precipitation levels are higher in May, averaging 69 mm (2.7 in) over about 12 days, compared to September's 39 mm (1.5 in) across 5 days. Additionally, relative humidity in May is notably greater at 62%, while September displays a more comfortable 46%. For further insights into May conditions specifically, you can refer to Mount Olympus weather in May.

When comparing the weather in September to that of June, it's clear that both months offer a range of temperatures, but with some distinct differences. In September, temperatures can drop to a minimum of -4°C (25°F) and reach a high of 33°C (93°F), averaging around 16°C (62°F). This month experiences slightly higher precipitation at 39 mm (1.5 in) over five days, alongside a lower humidity level of 46%. In contrast, June has milder temperatures, with a minimum of -1°C (31°F) and a maximum of 35°C (96°F), averaging 18°C (65°F). Rainfall is less frequent, with only 24 mm (0.9 in) across four days, though the humidity is higher at 56%. Overall, both months present a mix of warm and cool weather, but September tends to be drier and less humid than June. For a detailed look at June weather specifics, you can visit Mount Olympus weather in June.

In comparing the weather between July and September, it's evident that September experiences a broader temperature range, with lows dipping to -4°C (25°F) and highs reaching up to 33°C (93°F). In contrast, July maintains milder minimum temperatures of 6°C (44°F) while averaging a comfortable 23°C (74°F) with maximums at 35°C (95°F). While both months receive precipitation over five days, September has a higher total of 39 mm (1.5 in) compared to July's 19 mm (0.8 in). Additionally, humidity levels are slightly higher in September at 46% compared to July’s 44%. For more specifics on July weather, you can refer to Mount Olympus weather in July.

In September, the weather shows a broader range of temperatures, with a minimum of -4°C (25°F) and a maximum of 33°C (93°F), leading to an average of 16°C (62°F). In contrast, August presents a milder climate, with minimum temperatures at 8°C (46°F) and a maximum of 36°C (96°F), resulting in a warmer average of 22°C (71°F). Precipitation during September is slightly higher at 39 mm (1.5 in) over 5 days compared to August's 26 mm (1.0 in) over just 4 days, despite September experiencing higher humidity levels at 46%, compared to August's 37%. For more insights into August weather, refer to Mount Olympus weather in August.

September and October exhibit a notable shift in weather patterns. In September, temperatures typically range from a minimum of -4°C (25°F) to a maximum of 33°C (93°F), with an average of 16°C (62°F). The month experiences moderate precipitation of 39 mm (1.5 in) over five days and a relatively lower humidity level of 46%. In contrast, October brings a significant drop in temperatures, with a minimum of -21°C (-5°F) and an average of 7°C (45°F), peaking at 25°C (78°F). Precipitation increases to 51 mm (2.0 in), occurring across eight days, coupled with higher humidity at 67%. For more information on the specific conditions during this month, visit Mount Olympus weather in October.

In September, the weather is generally much warmer, with an average temperature of 16°C (62°F) and highs reaching up to 33°C (93°F). The month experiences relatively low humidity at 46% and only 39 mm (1.5 in) of precipitation over five days. In contrast, November brings a significant chill, with average temperatures dropping to just 2°C (36°F) and minimums plummeting to -17°C (1°F). The humidity rises dramatically to 84%, and precipitation increases slightly to 48 mm (1.9 in) over eight days. For more details on November weather, you can visit Mount Olympus weather in November.

In September, the weather typically showcases a wide range of temperatures, with minimums dipping to -4°C (25°F) and maximums reaching a warm 33°C (93°F). The average temperature is a comfortable 16°C (62°F), accompanied by relatively low humidity levels at 46% and minimal precipitation of 39 mm over just 5 days. In contrast, December presents a starkly different climate, with much colder temperatures where minimums can plummet to -18°C (0°F) and the average temperature settling at -4°C (26°F). Precipitation increases to 63 mm, spread over 11 days, and humidity rises significantly to 88%. For more details about conditions during this month, you can check Mount Olympus weather in December.

Compare Mount Olympus's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Mount Olympus

As September unfolds on Mount Olympus, the weather starts to transition from the summer heat, offering a blend of warm days and cooler nights. With maximum temperatures reaching a pleasant 33°C, the days are still vibrant, but they give way to the crispness of autumn as average temperatures settle around a comfortable 16°C. You may even experience the occasional chill, especially at night when temperatures can drop to -4°C. While September sees some rainfall, accumulating about 39 mm over five days, the overall humidity remains manageable at 46%, making it a favorable month for outdoor exploration. For a detailed look into what to expect from the climate throughout the year, visit Mount Olympus Climate.