Last updated: June 24, 2025
In September, the average temperature in Rockford, United States hovers around 20°C (69°F), offering a pleasant climate for various activities. Temperatures can range from a chilly 4°C (39°F) to a warm 33°C (91°F), so be prepared for anything! Expect an average precipitation of 70 mm (2.8 in) over about 8 days, with humidity levels around 78%, adding a tropical feel to your stay.
In September in Rockford, the average temperature is 20°C (69°F). The maximum can reach 33°C (91°F), while the minimum can drop as low as 4°C (39°F). This variation in temperature makes Rockford a versatile destination for travelers seeking both warm days and cool evenings.
In Rockford in September, the total precipitation amount is 70 mm (2.8 in), spread over the course of 8 days.
In Rockford in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.
In Rockford 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 Rockford.
UV Risk Categories
Weather in Rockford varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rockford, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -2°C (29°F) | 75 mm (2.9 inches) | 88% | moderate |
February Weather | 0°C (32°F) | 84 mm (3.3 inches) | 87% | moderate |
March Weather | 5°C (41°F) | 100 mm (3.9 inches) | 87% | high |
April Weather | 10°C (51°F) | 92 mm (3.6 inches) | 87% | very high |
May Weather | 17°C (63°F) | 128 mm (5.1 inches) | 81% | very high |
June Weather | 22°C (73°F) | 123 mm (4.9 inches) | 82% | very high |
July Weather | 24°C (76°F) | 109 mm (4.3 inches) | 81% | very high |
August Weather | 23°C (74°F) | 103 mm (4.0 inches) | 78% | very high |
September Weather | 20°C (69°F) | 70 mm (2.8 inches) | 78% | very high |
October Weather | 14°C (57°F) | 93 mm (3.7 inches) | 82% | high |
November Weather | 5°C (42°F) | 83 mm (3.3 inches) | 89% | moderate |
December Weather | 2°C (35°F) | 64 mm (2.5 inches) | 86% | low |