Last updated: June 24, 2025
In September, the average temperature in Middletown, United States hovers around 21°C (69°F), featuring a pleasant range from a crisp 5°C (41°F) to a warm 33°C (91°F). Expect about 84 mm (3.3 in) of precipitation spread across 7 days, while the average humidity sits at a comfortable 69%. Safe to say, it’s a month filled with diverse weather!
In September in Middletown, the average temperature is 21°C (69°F). The maximum can reach 33°C (91°F), while the minimum can drop as low as 5°C (41°F). This makes it a perfect time to explore the diverse climate, so be sure to pack accordingly for both warm and cool weather.
In Middletown in September, the total precipitation amount is 84 mm (3.3 in) distributed over a span of 7 days.
In Middletown in September, humidity is 69%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace, making travel somewhat uncomfortable as the air clings around you, urging you to seek shade and refreshment along your journey.
In Middletown 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 Middletown.
UV Risk Categories
Weather in Middletown varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Middletown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 80 mm (3.2 inches) | 87% | moderate |
| February Weather | 0°C (33°F) | 98 mm (3.8 inches) | 85% | moderate |
| March Weather | 6°C (42°F) | 124 mm (4.9 inches) | 86% | high |
| April Weather | 11°C (52°F) | 98 mm (3.9 inches) | 84% | very high |
| May Weather | 18°C (64°F) | 138 mm (5.4 inches) | 79% | very high |
| June Weather | 22°C (73°F) | 112 mm (4.4 inches) | 82% | extreme |
| July Weather | 24°C (76°F) | 114 mm (4.5 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 89 mm (3.5 inches) | 70% | very high |
| September Weather | 21°C (69°F) | 84 mm (3.3 inches) | 69% | very high |
| October Weather | 14°C (57°F) | 102 mm (4.0 inches) | 76% | high |
| November Weather | 5°C (42°F) | 92 mm (3.6 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 79 mm (3.1 inches) | 87% | moderate |