September Weather in Dillon, United States

Last updated: February 24, 2025

In Dillon, United States, September marks the transition to a cooler season, characterized by an average temperature of 9°C (48°F), peaking at 23°C (74°F) during the day and dipping down to a brisk -8°C (17°F) at night. The month experiences 36 mm (1.4 in) of precipitation across approximately 8 days, contributing to a humidity level of 65% that envelops the region. As summer fades, September's weather invites cozy attire and a hint of autumn's charm, making it a unique time for local experiences and outdoor adventures.

September Temperature in Dillon

In September, Dillon, United States, begins to transition into fall, with temperatures that reflect this shift. The minimum temperature hovers at a cool -8°C (17°F), while the average settles at a crisp 9°C (48°F), and the maximum reaches a pleasant 23°C (74°F). This month marks a notable change from the warmer summer months, showcasing a decline from August's mild conditions. As the days grow shorter, residents can expect refreshing air and vibrant autumn colors, making September a time to relish the comfortable outdoors before the chill of winter sets in.

September Weather in Dillon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Dillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec141624293648555448322114
Data source: Temperature data for Dillon 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 Dillon

In Dillon, United States, September marks a transitional period in precipitation patterns, with an average of 36 mm (1.4 in) of rain over approximately 8 days. This is the lowest monthly total since June, suggesting a gradual shift toward drier conditions as summer fades into fall. The decrease in precipitation from the more substantial totals seen in the spring and early summer months—where averages hovered around 70-80 mm—highlights a notable trend toward less moisture as the year progresses. Yet, this slight dip can offer a refreshing reprieve before October, which typically brings an uptick in rainfall at 61 mm (2.4 in), encouraging the continued cycle of renewal that characterizes the region's climate.

September Precipitation Trends in Dillon

The chart displays monthly precipitation patterns in Dillon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec425970807643594336614243
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dillon

In September, Dillon, United States, experiences a noticeable rise in humidity, with levels reaching 65% after a summer low in July. As the year transitions from the sweltering heat of summer to the cooler months of fall, humidity begins to climb following a dip in the previous months. This aligns with the pattern seen in both May and October, where humidity levels start to increase again, hinting at the return of more moisture-laden air. The changing seasons are evident as September bridges summer's dry warmth and autumn's damp chill, setting the stage for the wetter months ahead, as noted by the increased humidity in November and December.

September Average Humidity in Dillon

This chart illustrates the average monthly humidity levels in Dillon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Dillon

In September, Dillon experiences a notable UV Index of 11, categorizing it as extreme with a burn time of just 10 minutes. This month continues the trend of heightened UV exposure seen from the summer months, where indices reached their peak—14 in June and 13 in July. As the year transitions into autumn, while the UV Index decreases from the intensity of summer, it remains crucial for locals and visitors alike to stay vigilant. Regularly protecting your skin is essential during this time, especially since the sun's rays can still be quite strong. For more information on the UV Index throughout the year, visit Dillon UV Index.

Maximum UV Index Levels in Dillon for September

The chart shows the monthly maximum UV Index (UVI) for Dillon 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.
JanFebMarAprMayJunJulAugSepOctNovDec469121314131211754
Data source: Dillon 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 Dillon

As summer begins to wane, September in Dillon offers a delightful transition, basking in a generous 314 hours of sunshine. This marks a slight dip from the sun-soaked days of August but still maintains the warmth felt earlier in the season. The trend reveals that July and June lead with peak brightness, showcasing the best of summer, while September gracefully shifts toward autumn. Despite the diminishing daylight, the lingering warmth of late summer keeps spirits high, complemented by a rich tapestry of changing leaves. As the month progresses, the evolving landscape invites both residents and visitors to savor the last golden rays before the daylight dwindles further into fall.

Monthly Sunshine Duration in Dillon: September Highlighted

The September sunshine duration represents the total number of hours Dillon 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.
JanFebMarAprMayJunJulAugSepOctNovDec183h232h291h316h355h382h382h357h314h280h247h237h
Data source: Dillon September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Dillon During September

September in Dillon, United States, offers a delightful 67% chance of sunny weather, marking a peak in sunny days as summer transitions into fall. This increase follows a trend of rising sunshine, with August already boasting a 65% chance, and highlights the area's shift towards more favorable weather patterns. In fact, this sunny trend is a warm welcome after the fluctuating conditions of the spring and early summer months, where chances hovered around the mid-40s to low-50s. As autumn approaches, September stands out as one of the year's sunniest months, perfect for outdoor activities and enjoying the changing scenery.

Percentage of Sunny Days in September in Dillon

The chart illustrates the percentage of sunny days in Dillon 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 Dillon experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec51%38%48%52%44%56%54%66%68%56%61%55%
Data source: Dillon September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Dillon in September

As summer fades into autumn, September in Dillon, United States, witnesses a gradual shift in daylight duration, with the sun gracing the skies for approximately 12 hours each day. This marks a decrease from the peak of 14 hours in the heart of summer, specifically in June, July, and August. The trend reveals a slow but steady transition, as daylight hours diminish leading into October's 11 hours. While September still enjoys ample sunlight, it signals the approach of shorter days and the cozy embrace of fall, inviting residents to relish the final warm days before the chill of winter sets in.

Average Daylight Hours in Dillon for September

The chart illustrates the variation in daylight duration in Dillon throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 43m10h 42m11h 58m13h 16m14h 22m14h 54m14h 36m13h 38m12h 23m11h 6m9h 58m9h 24m
Data source: Dillon daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Dillon

As summer bids farewell in September, the winds in Dillon, United States, begin to whisper a gentle transition into autumn. With an average wind speed of 2.0 m/s (5 mph), September marks a noticeable dip from the slightly breezy months of July and August, where winds reached 1.9 m/s and 2.1 m/s, respectively. This subtle reduction in wind speed suggests a calming atmosphere, perfect for enjoying the fading warmth of early fall. Interestingly, September's winds are part of a broader pattern; they remain less energetic compared to earlier months, but this tranquil weather sets the stage for the crispness of October, which is expected to see a mild uptick in wind speeds. Overall, September in Dillon serves as a picturesque transition, where gentle breezes accompany the vibrant change of leaves and the advent of cozy, cooler days.

Average September Wind Speed in Dillon

The chart displays monthly wind speed patterns in Dillon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.63.22.42.62.32.11.92.12.0 m/s2.42.82.8
Data source: Dillon September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Dillon Compares to Other Months

The weather in Dillon 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 Dillon and find detailed weather information for every month.

The weather in September features a much milder temperature range with a minimum of -8°C (17°F) and a pleasant average of 9°C (48°F), reaching a maximum of 23°C (74°F). In contrast, January experiences significantly colder conditions, with temperatures dipping to a minimum of -26°C (-14°F) and averaging around -10°C (15°F), peaking at just 6°C (43°F). While September sees 36 mm (1.4 in) of precipitation over about 8 days and a humidity level of 65%, January has slightly higher precipitation at 42 mm (1.6 in) over 9 days but with a much higher humidity of 88%. To learn more about the January weather specifics, check out Dillon weather in January.

September and February showcase stark contrasts in weather conditions. In September, temperatures range from a minimum of -8°C (17°F) to a comfortable average of 9°C (48°F), peaking at a warm 23°C (74°F). The month experiences relatively moderate precipitation of 36 mm (1.4 in) over 8 days, accompanied by a humidity level of 65%. In contrast, February brings significantly colder temperatures, with a minimum of -27°C (-17°F) and an average of -9°C (16°F), topping out at just 10°C (49°F). This winter month sees higher precipitation levels at 59 mm (2.3 in) spread across 14 days and notably higher humidity at 87%. For a more detailed perspective on February weather, you can check out Dillon weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a cool -8°C (17°F) at night to a pleasant 23°C (74°F) during the day, with an average of 9°C (48°F) and lower precipitation at 36 mm (1.4 in) over 8 days. The humidity is moderate at 65%. In contrast, March experiences colder conditions, with nighttime lows dropping to -24°C (-11°F) and daytime highs only reaching 10°C (50°F), resulting in an average temperature of -5°C (24°F). Additionally, March sees a higher precipitation level of 70 mm (2.7 in) across 13 days, accompanied by increased humidity at 81%. For a more detailed overview of water conditions in March, you can explore Dillon weather in March.

September and April present notably different weather conditions. In September, temperatures generally range from a minimum of -8°C (17°F) to a comfortable average of 9°C (48°F) and peak at 23°C (74°F). This month also sees relatively light precipitation, averaging 36 mm (1.4 in) over about 8 days, with a humidity level of 65%. In contrast, April experiences harsher conditions, with temperatures dipping significantly lower, starting at a minimum of -20°C (-4°F) and averaging just -2°C (29°F), while maxing out at 12°C (54°F). This month is wetter as well, with 80 mm (3.2 in) of precipitation spread over about 13 days, coupled with higher humidity at 76%. For a closer look at the weather specifics in April, check Dillon weather in April.

When comparing the weather in September and May, September tends to be milder with average temperatures around 9°C (48°F), peaking at a comfortable 23°C (74°F). In contrast, May experiences cooler weather, with average temperatures around 2°C (36°F) and a maximum of only 20°C (67°F). While September sees relatively low precipitation at 36 mm (1.4 in) over 8 days, May has significantly higher rainfall, recording 76 mm (3.0 in) across 12 days. Despite the slightly higher humidity in May at 66%, both months maintain a comparable humidity level. For more insights on weather conditions during this time, check out Dillon weather in May.

In comparing the weather between September and June, we see some notable differences. September experiences slightly cooler temperatures, with a maximum of 23°C (74°F) compared to June's warmer high of 25°C (78°F). Both months share a similar average temperature of 9°C (48°F), but June tends to be a bit more humid at 58%, whereas September's humidity is higher at 65%. Additionally, September has lower total precipitation, with 36 mm (1.4 in) falling over 8 days, while June sees 43 mm (1.7 in) over 7 days. For more specific information regarding Dillon weather, you can refer to this link: Dillon weather in June.

In comparing the weather of September and July, we see distinct differences in temperature and precipitation. September features slightly cooler temperatures, with a minimum of -8°C (17°F) and an average of 9°C (48°F), while July enjoys milder conditions with a minimum of -2°C (29°F) and an average of 13°C (55°F). Despite July's warmer temperatures, it also experiences more precipitation, totaling 59 mm (2.3 in) over 12 days compared to September's 36 mm (1.4 in) over 8 days. Additionally, September has a higher humidity level at 65%, compared to July's 52%. For more details on the weather in July, check out Dillon weather in July.

In comparing the weather of September to that of August, we observe a notable drop in average temperatures, with September averaging 9°C (48°F) compared to August's 12°C (54°F). Both months exhibit similar maximum temperatures, but September's minimum temperature dips to -8°C (17°F), significantly cooler than August's minimum of 1°C (34°F). Precipitation levels are slightly lower in September at 36 mm (1.4 in) over 8 days, while August sees a total of 43 mm (1.7 in) across 9 days. Additionally, September has a higher humidity level at 65%, compared to August's 56%. For more details, check out Dillon weather in August.

September weather features milder temperatures, with a minimum of -8°C (17°F) and an average of 9°C (48°F), peaking at a maximum of 23°C (74°F). Overall, the month receives 36 mm (1.4 in) of precipitation over 8 days, accompanied by a relatively comfortable humidity of 65%. In contrast, October ushers in significantly colder conditions, with temperatures dropping to a minimum of -24°C (-10°F) and an average temperature of 0°C (32°F), while the maximum reaches just 19°C (66°F). Precipitation increases to 61 mm (2.4 in) across 10 days, and humidity rises to 76%, making the air feel noticeably more damp. For a detailed look at the weather in October, check out this link: Dillon weather in October.

September and November present a stark contrast in weather patterns. In September, temperatures range from a minimum of -8°C (17°F) to a comfortable maximum of 23°C (74°F), with an average of 9°C (48°F). This month typically sees about 36 mm (1.4 in) of precipitation over 8 days and a humidity level of 65%. In contrast, November experiences much colder temperatures, with a minimum of -26°C (-15°F) and an average around -6°C (22°F). The maximum temperature only reaches 10°C (50°F), and precipitation increases slightly to 42 mm (1.7 in), also spread over 8 days, but with a higher humidity of 82%. For more detailed information, you can check Dillon weather in November.

September and December present starkly contrasting weather conditions. In September, temperatures range from a chilly -8°C (17°F) at night to a pleasant 23°C (74°F) during the day, with an average of 9°C (48°F). The month sees moderate precipitation of 36 mm (1.4 in) over approximately 8 days, coupled with a humidity level of 65%. In contrast, December features much colder temperatures, with nighttime lows dipping to -28°C (-18°F) and daytime highs reaching only 7°C (45°F), resulting in an average temperature of -10°C (14°F). Precipitation increases slightly to 43 mm (1.7 in), occurring over 10 days, while humidity rises significantly to 89%. For more specific details about weather patterns in December, you can visit Dillon weather in December.

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Conclusion: What to Expect From September Weather in Dillon

As summer bids farewell, September in Dillon ushers in a refreshing shift in weather that contrasts sharply with the warmer months. With temperatures gradually cooling down, the average dips to a comfortable 9°C, offering a pleasant respite for outdoor enthusiasts. This month sees increased precipitation, with rain nourishing the landscape and enhancing the vibrant fall colors. Humidity levels remain moderate, creating a crisp atmosphere that’s perfect for exploration without the sweltering heat of summer. If you're curious about more detailed insights and comparisons of Dillon's weather patterns, visit Dillon Climate for a comprehensive overview.