Last updated: June 24, 2025
In September, the average temperature in Danbury, United States is a pleasant 19°C (66°F), with a minimum of 4°C (39°F) and a maximum soaring up to 33°C (91°F). Expect about 122 mm (4.8 in) of precipitation spread over 9 days, contributing to an average humidity of 68%. Enjoy the mild climate, but be prepared for the occasional rain!
In September in Danbury, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as 4°C (39°F). This makes Danbury an ideal destination for travelers seeking a pleasant climate with a range of temperatures.
In Danbury in September, the precipitation amount is 122 mm (4.8 in) over a span of 9 days.
In Danbury in September humidity is 68%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, creating a sticky atmosphere that can be a bit uncomfortable for traveling.
In Danbury 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 Danbury.
UV Risk Categories
Weather in Danbury varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Danbury, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -1°C (30°F) | 71 mm (2.8 inches) | 84% | moderate |
February Weather | 0°C (33°F) | 97 mm (3.8 inches) | 82% | moderate |
March Weather | 3°C (38°F) | 89 mm (3.5 inches) | 81% | high |
April Weather | 9°C (49°F) | 124 mm (4.9 inches) | 78% | very high |
May Weather | 15°C (59°F) | 115 mm (4.5 inches) | 69% | very high |
June Weather | 20°C (69°F) | 102 mm (4.0 inches) | 69% | very high |
July Weather | 24°C (75°F) | 145 mm (5.7 inches) | 62% | very high |
August Weather | 23°C (73°F) | 119 mm (4.7 inches) | 65% | very high |
September Weather | 19°C (66°F) | 122 mm (4.8 inches) | 68% | very high |
October Weather | 13°C (56°F) | 147 mm (5.8 inches) | 74% | high |
November Weather | 6°C (42°F) | 93 mm (3.7 inches) | 82% | moderate |
December Weather | 1°C (34°F) | 115 mm (4.5 inches) | 80% | low |