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September Weather in Springfield, United States

Last updated: June 24, 2025

In Springfield, United States, the average temperature in September hovers around 18°C (65°F). Expect minimums of 2°C (35°F) and maximums reaching up to 33°C (92°F). With an average humidity of 82%, the atmosphere feels quite humid. Be prepared for some rain, as you can anticipate about 121 mm (4.8 in) of precipitation over 9 days.

September Temperature in Springfield

In September in Springfield, the average temperature is 18°C (65°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 2°C (35°F). This diverse climate makes Springfield a great destination for travelers seeking both warmth and cool, refreshing conditions.

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 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec171633435972747165483425
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 121 mm (4.8 in) over the course of 9 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 121 mm (4.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec28296582127110119123121933142
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 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3558910998532
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 Weather-8°C (17°F)28 mm (1.1 inches)85%moderate
February Weather-9°C (17°F)29 mm (1.1 inches)89%moderate
March Weather1°C (34°F)65 mm (2.6 inches)81%moderate
April Weather6°C (44°F)82 mm (3.2 inches)82%very high
May Weather15°C (60°F)127 mm (5.0 inches)76%very high
June Weather22°C (72°F)110 mm (4.3 inches)81%very high
July Weather23°C (75°F)119 mm (4.7 inches)82%very high
August Weather21°C (71°F)123 mm (4.8 inches)83%very high
September Weather18°C (65°F)121 mm (4.8 inches)82%very high
October Weather9°C (49°F)93 mm (3.7 inches)82%moderate
November Weather1°C (35°F)31 mm (1.2 inches)87%moderate
December Weather-4°C (25°F)42 mm (1.6 inches)84%low

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