nomadseason

September Weather in Effingham, United States

Last updated: June 24, 2025

In Effingham, United States, the average temperature in September is a comfortable 22°C (72°F). Expect a range where temperatures can dip to a cool 6°C (43°F) and soar to a balmy 34°C (94°F). During this month, anticipate a cumulative precipitation of 83 mm (3.3 in) over approximately 8 rainy days, contributing to an average humidity level of 71%.

September Temperature in Effingham

In September in Effingham, the average temperature is 22°C (72°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 6°C (43°F). This variety in temperature makes Effingham an ideal destination for travelers seeking both warmth and cooler experiences.

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

The chart illustrates September temperature patterns in Effingham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Effingham, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec303145536577807671564336
Data source: Temperature data for Effingham 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 Effingham

In Effingham in September, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

September Precipitation Trends in Effingham

The chart displays monthly precipitation patterns in Effingham, 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 Effingham, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4031948121711276119841173832
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Effingham

In Effingham in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Effingham

This chart illustrates the average monthly humidity levels in Effingham, 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 Effingham is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Effingham

In Effingham in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Effingham.

Maximum UV Index Levels in Effingham for September

The chart shows the monthly maximum UV Index (UVI) for Effingham 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 Effingham typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Effingham 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 Effingham Compares to Other Months

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

This table compares monthly weather conditions in Effingham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)40 mm (1.6 inches)76%moderate
February Weather0°C (31°F)31 mm (1.2 inches)77%moderate
March Weather7°C (46°F)94 mm (3.7 inches)70%high
April Weather12°C (54°F)81 mm (3.2 inches)73%very high
May Weather18°C (65°F)217 mm (8.6 inches)82%very high
June Weather25°C (77°F)112 mm (4.4 inches)82%extreme
July Weather27°C (80°F)76 mm (3.0 inches)81%extreme
August Weather25°C (77°F)119 mm (4.7 inches)78%very high
September Weather22°C (72°F)83 mm (3.3 inches)71%very high
October Weather13°C (56°F)117 mm (4.6 inches)71%high
November Weather6°C (43°F)38 mm (1.5 inches)81%moderate
December Weather2°C (37°F)32 mm (1.2 inches)84%moderate

Compare Effingham's Climate with Cities Worldwide