Last updated: June 24, 2025
In September, the average temperature in Spring Grove, United States hovers around 18°C (65°F). While you may experience a minimum chill of 2°C (35°F), the mercury can soar up to a sizzling 33°C (91°F). Be prepared for some rain, as 120 mm (4.7 in) of precipitation typically falls over 10 days. The atmosphere is quite humid, with an average humidity level of 74%.
In September in Spring Grove, the average temperature is 18°C (65°F). The maximum can reach 33°C (91°F), while the minimum can be as low as 2°C (35°F). Pack accordingly for a varied climate to fully enjoy your trip to Spring Grove.
In Spring Grove in September, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.
In Spring Grove in September humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.
In Spring Grove 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 Spring Grove.
UV Risk Categories
Weather in Spring Grove varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Spring Grove, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 38 mm (1.5 inches) | 84% | moderate |
| February Weather | -7°C (20°F) | 50 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 62 mm (2.5 inches) | 84% | moderate |
| April Weather | 7°C (45°F) | 85 mm (3.4 inches) | 83% | very high |
| May Weather | 15°C (59°F) | 147 mm (5.8 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 132 mm (5.2 inches) | 79% | very high |
| July Weather | 23°C (74°F) | 112 mm (4.4 inches) | 75% | very high |
| August Weather | 21°C (70°F) | 104 mm (4.1 inches) | 69% | very high |
| September Weather | 18°C (65°F) | 120 mm (4.7 inches) | 74% | very high |
| October Weather | 10°C (49°F) | 128 mm (5.0 inches) | 79% | moderate |
| November Weather | 1°C (35°F) | 54 mm (2.1 inches) | 88% | moderate |
| December Weather | -3°C (27°F) | 40 mm (1.6 inches) | 82% | low |