September Weather in Springfield, United States

Last updated: February 24, 2025

In September, Springfield experiences a delightful blend of warm temperatures and refreshing humidity, with maximum highs reaching 35°C (94°F) and average temperatures around 22°C (71°F). As the month unfolds, residents can expect cooler nights, with minimum temperatures dipping to 5°C (42°F). Rainfall adds a refreshing touch, with an average precipitation of 60 mm (2.4 in) over 6 days, contributing to the lush autumn scenery. With a humidity level of 79%, the air retains a noticeable warmth, enhancing the season's charm and inviting outdoor activities amidst the vibrant, changing landscape.

September Temperature in Springfield

In Springfield, United States, the transition into September brings about a delightful shift in temperatures, marking the onset of early autumn. With a minimum of 5°C (42°F) and an average temperature of 22°C (71°F), the month presents a comfortable atmosphere for outdoor activities. The maximum temperature can still reach a warm 35°C (94°F), reminiscent of summer's lingering embrace. Compared to the steeper extremes of the early months, where January averages plunge to a biting -2°C (29°F), September offers a welcome reprieve. This month stands out with its balanced warmth, making it an ideal time to enjoy the vibrant fall scenery and crisp, clear days before the chill of October arrives.

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

The chart illustrates September temperature patterns in Springfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec293244536575777471574236
Data source: Temperature data for Springfield generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Springfield

In September, Springfield experiences a noticeable transition as summer yields to fall; the town receives 60 mm (2.4 in) of precipitation over just 6 days. This marks a decline from the wetter summer months, notably August, which brought 87 mm (3.4 in) of rain. With fewer precipitation days and a reduced overall amount, September sets a tone of diminishing rainfall as it paves the way for the upcoming autumn, making it one of the drier months of the year. This trend continues into October, where precipitation rises again to 102 mm (4.0 in), signaling the area's gradual shift in weather patterns as nature prepares for the cooler months ahead.

September Precipitation Trends in Springfield

The chart displays monthly precipitation patterns in Springfield, 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.
JanFebMarAprMayJunJulAugSepOctNovDec686913613114412711088601026951
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Springfield

In September, Springfield experiences a slight dip in humidity, with levels dropping to 79%, a refreshing change as the summer swelter begins to give way to the crispness of fall. This trend of decreasing humidity is consistent, as the city transitions from the warmer, more humid months of June through August, where humidity levels hover around 82%. As the year progresses into October, humidity remains stable at 79%, signaling a gradual shift towards the cooler, more comfortable conditions typical of autumn. Notably, this downward trend contrasts with the higher humidity levels of the winter months, where figures can soar above 85%, emphasizing September’s role as a transitional month in the climate of Springfield.

September Average Humidity in Springfield

This chart illustrates the average monthly humidity levels in Springfield, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Springfield

In September, Springfield experiences a notable transition in UV exposure, with a UV Index of 8, categorized as very high. This signals a gradual decline from the peak summer months, yet it remains crucial to stay vigilant. With an estimated burn time of just 15 minutes, residents and visitors alike are reminded to shield themselves from the sun's powerful rays. The drop from July and August, which recorded indices of 11 and 9, respectively, suggests that while September marks the onset of fall, UV radiation can still pose significant risks. As the month progresses, keep an eye on the changing UV levels to enjoy outdoor activities safely. For more detailed information, check out Springfield UV Index.

Maximum UV Index Levels in Springfield for September

The chart shows the monthly maximum UV Index (UVI) for Springfield 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.
JanFebMarAprMayJunJulAugSepOctNovDec357910111198643
Data source: Springfield 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 Springfield

As summer wanes, September in Springfield bathes in a delightful 293 hours of sunshine, marking a vibrant transition from the sun-drenched days of July and August, which boasted 351 and 330 hours, respectively. This month signals a gradual dip in sunlight as October approaches with 237 hours. Interestingly, the year’s overall trend reveals a peak in sunshine during the late spring and summer months, while the fall ushers in a gentle decline. September stands out as a pleasant bridge, allowing residents to relish the warmth and outdoor activities before the cooler months of November and December settle in. The shifting patterns reflect not just the rhythm of the seasons, but also the enduring charm of Springfield, where each month brings its own unique glow.

Monthly Sunshine Duration in Springfield: September Highlighted

The September sunshine duration represents the total number of hours Springfield 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.
JanFebMarAprMayJunJulAugSepOctNovDec119h172h209h242h286h340h351h330h293h237h205h194h
Data source: Springfield September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Springfield During September

In Springfield, United States, the likelihood of sunny weather notably increases in September, reaching an impressive 65% chance of sunshine. This marks a significant uptick from the relatively muted probabilities in the earlier months, where January and February hover around 30% to 31%. As summer transitions into fall, the trend reveals a gradual rise in sunny days starting from June's 42% to August's 49%, before peaking in September. This seasonal shift not only highlights September as a prime time for outdoor activities but also showcases the beauty of early autumn in Springfield, where clear skies can dominate the landscape, inviting both residents and visitors to bask in the warmth of the lingering summer sun.

Percentage of Sunny Days in September in Springfield

The chart illustrates the percentage of sunny days in Springfield 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 Springfield experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec31%30%42%49%29%42%50%49%65%36%50%42%
Data source: Springfield September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Springfield in September

As summer fades in Springfield, September ushers in a noticeable shift in daylight duration, with the sun gracing the skies for 12 hours each day. This marks a gradual decline from the peak 14 hours of daylight experienced in June, July, and August. The transition is gentle yet palpable, as the days grow shorter, preparing the community for the crisp embrace of autumn. Interestingly, September’s daylight is slightly shorter than August's 13 hours, hinting at the annual rhythm of nature. Looking ahead, daylight will continue to decrease, dropping to 11 hours in October, reinforcing the cyclical shift towards winter. This gradual dance of daylight not only marks the changing seasons but also sets a captivating backdrop for the month’s activities and reflections in Springfield.

Average Daylight Hours in Springfield for September

The chart illustrates the variation in daylight duration in Springfield throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 42m10h 42m11h 58m13h 16m14h 22m14h 55m14h 37m13h 38m12h 23m11h 6m9h 58m9h 23m
Data source: Springfield daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Springfield

As September arrives in Springfield, the average wind speed picks up slightly to 3.6 m/s (8 mph), a welcome change from the summer months, which saw the lowest gusts of the year. This month marks a transition, as breezy conditions return after July's calm days of just 2.5 m/s (5 mph). September's winds echo the gentler breezes of May and April, hinting at the upcoming fall season, where speeds gradually increase again. As autumn approaches, residents can look forward to the refreshing winds that come with changing leaves and cooler temperatures, fostering a vibrant atmosphere in this charming town.

Average September Wind Speed in Springfield

The chart displays monthly wind speed patterns in Springfield, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.74.04.44.03.63.12.52.73.6 m/s3.84.04.2
Data source: Springfield September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Springfield Compares to Other Months

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

September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 35°C (94°F), with an average of 22°C (71°F). The month experiences approximately 60 mm (2.4 in) of precipitation over about 6 days, accompanied by a relatively high humidity level of 79%. In contrast, January features much harsher conditions, with temperatures plummeting to a minimum of -26°C (-15°F) and reaching a maximum of 17°C (63°F), averaging -2°C (29°F). Precipitation slightly increases to 68 mm (2.7 in), spread over 7 days, and the humidity remains high at 84%. For more details on January weather, you can check Springfield weather in January.

September and February showcase stark contrasts in weather conditions. September typically enjoys milder temperatures, ranging from a minimum of 5°C (42°F) to a warm average of 22°C (71°F) and reaching highs of 35°C (94°F), accompanied by 60 mm (2.4 in) of precipitation over about six days and a humidity level of 79%. In stark contrast, February experiences frigid conditions, with temperatures plummeting as low as -22°C (-7°F), averaging around 0°C (32°F), and peaking at 23°C (74°F). This month sees slightly higher precipitation at 69 mm (2.7 in) across approximately ten days, coupled with a humidity level of 82%. For more detailed insights about the weather in February, you can visit Springfield weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a cool 5°C (42°F) at night to a warm 35°C (94°F) during the day, with an average of 22°C (71°F). The month experiences about 60 mm (2.4 in) of precipitation over 6 days, along with a humidity level of 79%. In stark contrast, March sees much cooler temperatures, with nighttime lows plummeting to -18°C (0°F) and daily highs reaching only up to 25°C (77°F), averaging around 6°C (44°F). The month has a significantly higher precipitation level of 136 mm (5.4 in) spread across 11 days, coupled with slightly higher humidity at 84%. For a detailed look at what to expect weather-wise, visit Springfield weather in March.

September and April exhibit notable differences in weather patterns. September tends to be warmer, with average temperatures ranging from a minimum of 5°C (42°F) to a maximum of 35°C (94°F) and an average of 22°C (71°F). In contrast, April experiences cooler temperatures, with an average range of -7°C (20°F) to 29°C (84°F), averaging around 11°C (53°F). Additionally, September has lower precipitation levels of 60 mm (2.4 in) over 6 days, compared to April's rainfall of 130 mm (5.1 in) spread across 11 days. Humidity levels are quite similar, with September at 79% and April slightly higher at 83%. For a more detailed look at April weather, you can visit Springfield weather in April.

When comparing the weather in September and May, several key differences emerge. September typically boasts warmer temperatures, with averages around 22°C (71°F) and a maximum of 35°C (94°F), while May has a slightly cooler average of 19°C (66°F) and a maximum reaching 34°C (94°F). Precipitation patterns also vary significantly; September receives about 60 mm (2.4 in) of rain over just 6 days, whereas May is much wetter, with 144 mm (5.7 in) falling across 15 days. Despite these differences, humidity levels remain similar, hovering around 79% in September and 80% in May. For more detailed insights, you can check Springfield weather in May.

When comparing the weather in September and June, notable differences emerge. September tends to be slightly warmer on average, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 35°C (94°F), resulting in an average of 22°C (71°F). In contrast, June boasts a milder minimum temperature of 11°C (52°F) and an average of 24°C (75°F), with max temperatures reaching 34°C (94°F). Additionally, rainfall is more abundant in June, with 126 mm (5.0 in) over 11 days, compared to September's 60 mm (2.4 in) over just 6 days. Humidity levels are also slightly higher in June at 83%, compared to 79% in September. For more detailed information, you can refer to Springfield weather in June.

In comparing the weather between September and July, we can observe notable differences in temperature and precipitation patterns. September typically experiences a wider temperature range, with minimums dropping to 5°C (42°F) and maximums reaching up to 35°C (94°F), while the average temperature is around 22°C (71°F). In contrast, July has a milder minimum temperature of 13°C (56°F) and an average peak of 36°C (97°F), making it generally warmer. Additionally, September records less precipitation than July, with 60 mm (2.4 inches) over 6 days, compared to July’s 110 mm (4.3 inches) over 11 days. Humidity levels are relatively similar, sitting at 79% in September and slightly higher at 82% in July. For more detailed insights about July's weather, you can check out Springfield weather in July.

In September, temperatures experience a notable drop, with minimums reaching 5°C (42°F) compared to August's higher minimum of 12°C (54°F). The average temperature in September slightly decreases to 22°C (71°F), while August maintains a warmer average of 24°C (75°F). Despite both months having similar maximum temperatures, September's precipitation of 60 mm (2.4 in) over 6 days is less than the 87 mm (3.4 in) across 11 days in August. Humidity remains high in both months, with September at 79% and August at 82%. For more detailed comparisons, you can visit Springfield weather in August.

September and October present a noticeable shift in weather conditions. In September, temperatures range from a mild minimum of 5°C (42°F) to a warm maximum of 35°C (94°F), with an average of 22°C (71°F). The month experiences about 60 mm (2.4 in) of precipitation over 6 days, while humidity remains relatively high at 79%. In contrast, October sees a drop in temperatures, with a minimum of -4°C (25°F) and an average of 14°C (58°F), although the maximum can still reach 32°C (90°F). The month is wetter, with precipitation increasing to 102 mm (4.0 in) over 10 days, maintaining the same humidity level of 79%. This transition marks the gradual approach of colder weather, as detailed in the link Springfield weather in October.

September weather is characterized by warm temperatures, with an average of 22°C (71°F) and highs reaching up to 35°C (94°F). It features relatively low precipitation, with only 60 mm (2.4 in) over about 6 days, resulting in a comfortable humidity level of 79%. In contrast, November brings much cooler conditions, with an average temperature of just 5°C (42°F) and nighttime lows dropping to -13°C (8°F). The month sees slightly higher precipitation at 69 mm (2.7 in) across around 9 days, accompanied by increased humidity at 88%. For more detailed information, you can refer to Springfield weather in November.

September and December showcase a dramatic shift in weather conditions. In September, temperatures range from a mild 5°C (42°F) at night to a warm average of 22°C (71°F) during the day, peaking at a sweltering 35°C (94°F). Meanwhile, December plunges to much colder temperatures, with a minimum of -19°C (-3°F) and an average around 2°C (36°F), reaching a maximum of 20°C (68°F). While September experiences more substantial rainfall with 60 mm (2.4 in) over six days, December has slightly less precipitation at 50 mm (2.0 in) but with a higher humidity of 87%. This stark contrast highlights the transition from the warmth of summer to the chill of winter in Springfield. For more detailed information, refer to Springfield weather in December.

Compare Springfield's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Springfield

September in Springfield marks a transition from the heat of summer to the crispness of fall, offering a unique blend of warmth and occasional rain. With comfortable average temperatures and a few wet days, this month provides a delightful reprieve from the summer swelter. The high humidity lingers, but it gradually yields to cooler evenings, highlighting the changing season. This balance of warm days and refreshing nights sets September apart from both the scorching summer months and the brisk onset of autumn. For a deeper understanding of how these shifts fit into the city's overall climate patterns, explore Springfield Climate.