Last updated: June 24, 2025
In September, the average temperature in Carlisle, United States reaches a pleasant 21°C (71°F). During this time, you can expect temperatures to fluctuate, with a minimum of 7°C (46°F) and a maximum of 35°C (96°F). Be prepared for some rain, as the area typically receives about 118 mm (4.7 in) of precipitation over approximately 9 days. With an average humidity of 73%, the weather can feel quite warm, so make sure to stay hydrated!
In September in Carlisle, the average temperature is 21°C (71°F). Maximums can reach 35°C (96°F) and minimums can drop as low as 7°C (46°F). This diverse temperature range makes it ideal for travelers to pack layered clothing to accommodate both warm days and cooler evenings.
In Carlisle in September, the precipitation amount is 118 mm (4.7 in), occurring over a span of 9 days.
In Carlisle in September humidity is 73%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit uncomfortable, but with proper hydration and breaks in the shade, it’s still manageable for traveling.
In Carlisle 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 Carlisle.
UV Risk Categories
Weather in Carlisle varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Carlisle, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 97 mm (3.8 inches) | 88% | moderate |
| February Weather | 4°C (40°F) | 133 mm (5.2 inches) | 88% | moderate |
| March Weather | 8°C (47°F) | 128 mm (5.0 inches) | 87% | high |
| April Weather | 13°C (56°F) | 137 mm (5.4 inches) | 85% | very high |
| May Weather | 19°C (67°F) | 127 mm (5.0 inches) | 81% | very high |
| June Weather | 23°C (73°F) | 178 mm (7.0 inches) | 82% | very high |
| July Weather | 25°C (77°F) | 101 mm (4.0 inches) | 81% | very high |
| August Weather | 24°C (75°F) | 105 mm (4.2 inches) | 73% | very high |
| September Weather | 21°C (71°F) | 118 mm (4.7 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 109 mm (4.3 inches) | 78% | high |
| November Weather | 7°C (45°F) | 84 mm (3.3 inches) | 89% | moderate |
| December Weather | 5°C (41°F) | 127 mm (5.0 inches) | 87% | moderate |