Last updated: June 24, 2025
In Thornton, United States, the average temperature in September is a warm 27°C (81°F). However, temperatures can vary significantly; the minimum might drop to 11°C (51°F), while the maximum can soar to 39°C (103°F). You can expect 98 mm (3.9 in) of precipitation spread over 10 days, with an average humidity level of 69%. Enjoy the diverse climate that this month brings!
In September in Thornton, the average temperature is 27°C (81°F). Maximums can reach 39°C (103°F), while minimums can drop to as low as 11°C (51°F). Be sure to pack lightweight clothes for the daytime and a warmer layer for the cooler evenings if you're traveling during this time.
In Thornton in September, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.
In Thornton in September, humidity is 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.
In Thornton in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Thornton.
UV Risk Categories
Weather in Thornton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Thornton, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 10°C (50°F) | 78 mm (3.1 inches) | 79% | moderate |
February Weather | 11°C (52°F) | 102 mm (4.0 inches) | 80% | high |
March Weather | 17°C (63°F) | 97 mm (3.8 inches) | 78% | very high |
April Weather | 19°C (67°F) | 116 mm (4.6 inches) | 79% | extreme |
May Weather | 24°C (76°F) | 168 mm (6.6 inches) | 81% | extreme |
June Weather | 28°C (82°F) | 75 mm (3.0 inches) | 77% | extreme |
July Weather | 30°C (86°F) | 59 mm (2.3 inches) | 71% | extreme |
August Weather | 30°C (87°F) | 84 mm (3.3 inches) | 67% | extreme |
September Weather | 27°C (81°F) | 98 mm (3.9 inches) | 69% | very high |
October Weather | 21°C (71°F) | 109 mm (4.3 inches) | 73% | very high |
November Weather | 15°C (59°F) | 67 mm (2.6 inches) | 82% | high |
December Weather | 12°C (54°F) | 91 mm (3.6 inches) | 87% | moderate |