Last updated: June 24, 2025
In September, the average temperature in Winchester, United States is a pleasant 20°C (69°F). However, temperatures can vary widely, with a minimum of 4°C (40°F) and a maximum soaring up to 33°C (92°F). Be prepared for some rain, as the area experiences an average precipitation of 84 mm (3.3 in) over about 7 days. With an average humidity of 78%, it’s a month that blends warmth with refreshing moisture.
In September in Winchester, the average temperature is 20°C (69°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 4°C (40°F). This varied climate makes Winchester an ideal destination for travelers seeking both warmth and cooler experiences.
In Winchester in September, the total precipitation amount is 84 mm (3.3 in) distributed over a span of 7 days.
In Winchester 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 Winchester 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 Winchester.
UV Risk Categories
Weather in Winchester varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Winchester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (30°F) | 74 mm (2.9 inches) | 85% | moderate |
| February Weather | 0°C (32°F) | 94 mm (3.7 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 107 mm (4.2 inches) | 86% | high |
| April Weather | 11°C (51°F) | 98 mm (3.9 inches) | 87% | very high |
| May Weather | 17°C (63°F) | 137 mm (5.4 inches) | 81% | very high |
| June Weather | 22°C (72°F) | 121 mm (4.8 inches) | 82% | extreme |
| July Weather | 24°C (76°F) | 105 mm (4.1 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 101 mm (4.0 inches) | 79% | very high |
| September Weather | 20°C (69°F) | 84 mm (3.3 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 98 mm (3.9 inches) | 81% | high |
| November Weather | 5°C (41°F) | 84 mm (3.3 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 72 mm (2.8 inches) | 86% | low |