Last updated: June 24, 2025
In Effingham, United States, the average temperature in September hovers around 22°C (72°F). However, be prepared for a climate that can swing from a cool 7°C (45°F) to a warm 34°C (93°F). During this month, you can expect approximately 68 mm (2.7 in) of precipitation spread over about 6 days, contributing to an average humidity of 79%. Enjoy your time in this vibrant locale!
In September in Effingham, the average temperature is 22°C (72°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as 7°C (45°F). This makes Effingham an ideal destination for travelers who enjoy mild weather with the opportunity for both warm days and cooler nights.
In Effingham in September, the precipitation amount is 68 mm (2.7 in) spread over the course of 6 days.
In Effingham in September humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.
In Effingham 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 Effingham.
UV Risk Categories
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.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 83 mm (3.3 inches) | 84% | moderate |
| February Weather | 2°C (35°F) | 89 mm (3.5 inches) | 82% | moderate |
| March Weather | 8°C (46°F) | 133 mm (5.2 inches) | 84% | high |
| April Weather | 13°C (55°F) | 123 mm (4.8 inches) | 83% | very high |
| May Weather | 20°C (67°F) | 151 mm (6.0 inches) | 80% | extreme |
| June Weather | 25°C (77°F) | 107 mm (4.2 inches) | 83% | extreme |
| July Weather | 26°C (79°F) | 106 mm (4.2 inches) | 82% | very high |
| August Weather | 24°C (76°F) | 103 mm (4.1 inches) | 82% | very high |
| September Weather | 22°C (72°F) | 68 mm (2.7 inches) | 79% | very high |
| October Weather | 15°C (59°F) | 114 mm (4.5 inches) | 79% | high |
| November Weather | 6°C (43°F) | 91 mm (3.6 inches) | 88% | moderate |
| December Weather | 3°C (38°F) | 78 mm (3.1 inches) | 87% | moderate |