Last updated: June 24, 2025
In September, the average temperature in Raleigh, United States reaches a pleasant 23°C (75°F). Expect variability, as temperatures can dip to a minimum of 9°C (48°F) and soar to a maximum of 35°C (96°F). Be prepared for some rain, as 140 mm (5.5 in) of precipitation can be expected over 10 days. With an average humidity of 79%, it’s a month that balances warmth and moisture beautifully.
In September in Raleigh, the average temperature is 23°C (75°F). Maximum temperatures can reach 35°C (96°F), while minimums can drop to as low as 9°C (48°F). This makes it an ideal time for travelers to enjoy a pleasant mix of warm days and cooler evenings in Raleigh.
In Raleigh in September, the total precipitation amount is 140 mm (5.5 in) spread over a period of 10 days.
In Raleigh in September humidity is 79%. With an average temperature of 23°C (75°F), this humidity feels like a warm, enveloping blanket that can make traveling a bit uncomfortable. The air is thick and heavy, often leading to a sticky sensation on your skin, which can sap your energy and enthusiasm for exploration. Staying hydrated and taking breaks in the shade becomes essential to enjoy your visit.
In Raleigh in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Raleigh.
UV Risk Categories
Weather in Raleigh varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Raleigh, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 6°C (43°F) | 93 mm (3.6 inches) | 85% | moderate |
February Weather | 9°C (49°F) | 107 mm (4.2 inches) | 82% | high |
March Weather | 12°C (53°F) | 80 mm (3.2 inches) | 81% | very high |
April Weather | 17°C (62°F) | 114 mm (4.5 inches) | 80% | very high |
May Weather | 22°C (71°F) | 114 mm (4.5 inches) | 81% | extreme |
June Weather | 25°C (76°F) | 131 mm (5.2 inches) | 81% | extreme |
July Weather | 27°C (81°F) | 117 mm (4.6 inches) | 81% | extreme |
August Weather | 26°C (79°F) | 141 mm (5.6 inches) | 80% | very high |
September Weather | 23°C (75°F) | 140 mm (5.5 inches) | 79% | very high |
October Weather | 18°C (66°F) | 85 mm (3.4 inches) | 80% | very high |
November Weather | 11°C (51°F) | 83 mm (3.3 inches) | 85% | moderate |
December Weather | 8°C (47°F) | 107 mm (4.2 inches) | 86% | moderate |