Last updated: June 24, 2025
In Bellefonte, United States, the average temperature in September hovers around 18°C (65°F), providing a pleasant atmosphere for visitors. Temperatures can vary significantly, dipping to a chilly 1°C (34°F) at their lowest and soaring up to a warm 33°C (91°F). Be prepared for some rainfall, as the area receives about 119 mm (4.7 in) of precipitation over approximately 10 days, coupled with an average humidity of 67%.
In September in Bellefonte, the average temperature is 18°C (65°F). Maximums can reach 33°C (91°F), while minimums can drop as low as 1°C (34°F). Be prepared for a diverse range of temperatures when you travel, ensuring you're equipped for both warm days and cooler nights.
In Bellefonte in September, the total precipitation amount is 119 mm (4.7 in) over the span of 10 days.
In Bellefonte in September humidity is 67%. With an average temperature of 18°C (65°F), this humidity feels like a mild blanket wrapping around you, making outdoor activities feel pleasantly refreshing, yet you may find yourself reaching for a drink more often to stay hydrated while exploring the sights.
In Bellefonte 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 Bellefonte.
UV Risk Categories
Weather in Bellefonte varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bellefonte, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 71 mm (2.8 inches) | 89% | moderate |
| February Weather | -1°C (31°F) | 104 mm (4.1 inches) | 90% | moderate |
| March Weather | 3°C (38°F) | 89 mm (3.5 inches) | 89% | high |
| April Weather | 9°C (48°F) | 110 mm (4.3 inches) | 88% | very high |
| May Weather | 15°C (59°F) | 135 mm (5.3 inches) | 80% | very high |
| June Weather | 20°C (68°F) | 100 mm (4.0 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 127 mm (5.0 inches) | 74% | very high |
| August Weather | 22°C (72°F) | 99 mm (3.9 inches) | 64% | very high |
| September Weather | 18°C (65°F) | 119 mm (4.7 inches) | 67% | very high |
| October Weather | 12°C (55°F) | 114 mm (4.5 inches) | 81% | high |
| November Weather | 4°C (40°F) | 83 mm (3.3 inches) | 89% | moderate |
| December Weather | 1°C (33°F) | 91 mm (3.6 inches) | 88% | low |