Last updated: June 24, 2025
In September, the average temperature in Forest City, United States is a pleasant 17°C (64°F). However, temperatures can vary significantly, with a minimum of 1°C (34°F) and a maximum of 31°C (89°F). Brace yourself for some rain, as the area typically receives 93 mm (3.7 in) of precipitation over 10 days. With an average humidity of 66%, it's a great time to pack accordingly and enjoy the diverse climate!
In September in Forest City, the average temperature is 17°C (64°F). Maximum temperatures can reach 31°C (89°F), while minimums can dip as low as 1°C (34°F). Be sure to pack layers to enjoy a range of activities, from warm days to cooler evenings.
In Forest City in September, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.
In Forest City in September, humidity is 66%. With an average temperature of 17°C (64°F), this humidity feels like a gentle embrace, making it quite comfortable for traveling as long as you stay hydrated and wear light clothing.
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 | -3°C (27°F) | 75 mm (3.0 inches) | 87% | moderate |
| February Weather | -1°C (30°F) | 96 mm (3.8 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 90 mm (3.5 inches) | 85% | high |
| April Weather | 8°C (47°F) | 114 mm (4.5 inches) | 83% | very high |
| May Weather | 14°C (58°F) | 131 mm (5.1 inches) | 75% | very high |
| June Weather | 19°C (67°F) | 97 mm (3.8 inches) | 73% | very high |
| July Weather | 22°C (72°F) | 112 mm (4.4 inches) | 65% | very high |
| August Weather | 21°C (70°F) | 110 mm (4.3 inches) | 62% | very high |
| September Weather | 17°C (64°F) | 93 mm (3.7 inches) | 66% | very high |
| October Weather | 12°C (54°F) | 140 mm (5.5 inches) | 79% | high |
| November Weather | 4°C (39°F) | 93 mm (3.7 inches) | 87% | moderate |
| December Weather | 0°C (32°F) | 94 mm (3.7 inches) | 85% | low |