Last updated: June 24, 2025
In Forest City, United States, the average temperature in September settles at a comfortable 19°C (66°F). However, be prepared for a range, as the temperature can dip to a chilly 3°C (37°F) or soar to a warm 33°C (93°F). Expect around 108 mm (4.3 in) of precipitation over 10 days, contributing to an average humidity level of 75%, creating a vibrant and lush atmosphere.
In September in Forest City, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (93°F), while the minimum can be as low as 3°C (37°F). Be prepared for a wide range of temperatures, making it a perfect time to explore both the warm days and cool nights in Forest City.
In Forest City in September, the total precipitation amount is 108 mm (4.3 in) spread over a duration of 10 days.
In Forest City in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.
In Forest City 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 Forest City.
UV Risk Categories
Weather in Forest City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Forest City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (19°F) | 34 mm (1.4 inches) | 82% | moderate |
| February Weather | -8°C (18°F) | 47 mm (1.9 inches) | 84% | moderate |
| March Weather | 1°C (35°F) | 72 mm (2.9 inches) | 80% | moderate |
| April Weather | 7°C (46°F) | 87 mm (3.4 inches) | 81% | very high |
| May Weather | 15°C (60°F) | 158 mm (6.2 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 129 mm (5.1 inches) | 80% | extreme |
| July Weather | 23°C (74°F) | 105 mm (4.1 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 122 mm (4.8 inches) | 77% | very high |
| September Weather | 19°C (66°F) | 108 mm (4.3 inches) | 75% | very high |
| October Weather | 10°C (49°F) | 108 mm (4.3 inches) | 80% | moderate |
| November Weather | 2°C (35°F) | 45 mm (1.8 inches) | 87% | moderate |
| December Weather | -3°C (27°F) | 38 mm (1.5 inches) | 83% | moderate |