Last updated: June 24, 2025
In September, the average temperature in Manchester, United States is a comfortable 18°C (65°F), with lows dipping to 3°C (37°F) and highs reaching up to 33°C (92°F). Expect around 79 mm (3.1 in) of precipitation spread over 9 days, paired with an average humidity of 78%. Whether you're planning outdoor activities or indoor relaxation, this month's climate offers a mix of experiences!
In September in Manchester, the average temperature is 18°C (65°F), with maximums that can reach 33°C (92°F) and minimums that can drop to as low as 3°C (37°F). Overall, travelers should be prepared for a range of temperatures, ensuring they pack both warm clothing for the cooler evenings and lighter attire for the hotter days.
In Manchester in September, the precipitation amount is 79 mm (3.1 in) spread over 9 days.
In Manchester in September, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.
In Manchester in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Manchester.
UV Risk Categories
Weather in Manchester varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Manchester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 80 mm (3.1 inches) | 90% | low |
| February Weather | -2°C (29°F) | 81 mm (3.2 inches) | 90% | moderate |
| March Weather | 2°C (35°F) | 76 mm (3.0 inches) | 87% | high |
| April Weather | 8°C (46°F) | 119 mm (4.7 inches) | 88% | very high |
| May Weather | 15°C (59°F) | 119 mm (4.7 inches) | 82% | very high |
| June Weather | 20°C (68°F) | 91 mm (3.6 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 159 mm (6.3 inches) | 78% | very high |
| August Weather | 22°C (71°F) | 110 mm (4.3 inches) | 76% | very high |
| September Weather | 18°C (65°F) | 79 mm (3.1 inches) | 78% | high |
| October Weather | 12°C (54°F) | 145 mm (5.7 inches) | 84% | moderate |
| November Weather | 4°C (40°F) | 86 mm (3.4 inches) | 89% | moderate |
| December Weather | 0°C (32°F) | 90 mm (3.6 inches) | 86% | low |