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September Weather in Springfield, United States

Last updated: June 24, 2025

In September, the average temperature in Springfield, United States hovers around 22°C (71°F). However, be prepared for a range, as temperatures can dip to 1°C (34°F) or soar to a sizzling 39°C (102°F). Rainfall is likely, with an expected precipitation of 30 mm (1.2 in) spread over 5 days, while humidity stays high at approximately 80%.

September Temperature in Springfield

In September in Springfield, the average temperature is 22°C (71°F). Maximum can reach 39°C (102°F) and minimum can be as low as 1°C (34°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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. In Springfield, September typically has an average temperature of 22°C (71°F), with highs reaching up to 39°C (102°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec363647546375787671554638
Data source: Temperature data for Springfield 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 Springfield

In Springfield in September, the precipitation amount is 30 mm (1.2 in) over the course of 5 days.

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. In Springfield, September typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec17133245684147543025915
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Springfield

In Springfield in September, humidity is 80%. With an average temperature of 22°C (71°F), this humidity feels like a warm, enveloping blanket, making travel slightly uncomfortable as skin becomes clammy and sweat clings to clothes.

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, helping you understand how conditions vary by season. In September, average humidity in Springfield is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%76%64%61%71%75%75%80%80%78%76%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Springfield

In Springfield in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Springfield.

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. In September, the maximum UV index in Springfield typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458101112121110753
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.

How September Weather in Springfield Compares to Other Months

Weather in Springfield varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Springfield, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Springfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)17 mm (0.7 inches)73%moderate
February Weather2°C (36°F)13 mm (0.5 inches)76%moderate
March Weather9°C (48°F)32 mm (1.3 inches)64%very high
April Weather12°C (54°F)44 mm (1.8 inches)61%very high
May Weather17°C (63°F)68 mm (2.7 inches)71%extreme
June Weather24°C (75°F)41 mm (1.6 inches)75%extreme
July Weather26°C (79°F)47 mm (1.8 inches)75%extreme
August Weather24°C (76°F)54 mm (2.1 inches)80%extreme
September Weather22°C (71°F)30 mm (1.2 inches)80%very high
October Weather13°C (55°F)25 mm (1.0 inches)78%high
November Weather8°C (46°F)9 mm (0.3 inches)76%moderate
December Weather3°C (38°F)15 mm (0.6 inches)78%moderate

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