Last updated: June 24, 2025
In September, the average temperature in Hanover, United States is a pleasant 19°C (67°F). However, temperatures can vary significantly, with minimums dropping to 2°C (37°F) and maximums reaching a warm 33°C (92°F). Expect some rain, as 115 mm (4.5 in) of precipitation typically falls over the month across about 10 days. With an average humidity of 74%, it's a good idea to be prepared for some sticky days!
In September in Hanover, the average temperature is 19°C (67°F). Maximums can reach 33°C (92°F), and minimums can be as low as 2°C (37°F). This variety in temperatures makes it essential for travelers to pack accordingly for both warm and cool conditions.
In Hanover in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.
In Hanover in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.
In Hanover 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 Hanover.
UV Risk Categories
Weather in Hanover varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hanover, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (22°F) | 54 mm (2.1 inches) | 84% | moderate |
| February Weather | -4°C (24°F) | 59 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 71 mm (2.8 inches) | 84% | high |
| April Weather | 9°C (48°F) | 94 mm (3.7 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 147 mm (5.8 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 125 mm (4.9 inches) | 79% | very high |
| July Weather | 24°C (76°F) | 79 mm (3.1 inches) | 75% | very high |
| August Weather | 22°C (72°F) | 102 mm (4.0 inches) | 69% | very high |
| September Weather | 19°C (67°F) | 115 mm (4.5 inches) | 74% | very high |
| October Weather | 11°C (53°F) | 110 mm (4.3 inches) | 79% | moderate |
| November Weather | 3°C (38°F) | 46 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 46 mm (1.8 inches) | 82% | low |