Last updated: June 24, 2025
In Glasgow, United States, the average temperature in September is a delightful 23°C (73°F). However, be prepared for a range, as temperatures can dip to a cool 8°C (47°F) and soar up to a warm 36°C (98°F). Expect 129 mm (5.1 in) of precipitation over approximately 9 days, contributing to an average humidity of 71%. Perfect your packing strategy to embrace the beauty of the season!
In September in Glasgow, the average temperature is 23°C (73°F), with maximums reaching 36°C (98°F) and minimums dropping as low as 8°C (47°F). It's an ideal time to visit for those who enjoy mild to warm weather, but be prepared for temperature fluctuations throughout the day.
In Glasgow in September, the total precipitation amount is 129 mm (5.1 in) over the course of 9 days.
In Glasgow in September humidity is 71%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor exploration slightly uncomfortable but still manageable if you stay hydrated and plan for breaks in shaded areas.
In Glasgow 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 Glasgow.
UV Risk Categories
Weather in Glasgow varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Glasgow, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 4°C (39°F) | 102 mm (4.0 inches) | 87% | moderate |
February Weather | 6°C (43°F) | 184 mm (7.3 inches) | 86% | high |
March Weather | 10°C (51°F) | 145 mm (5.7 inches) | 86% | high |
April Weather | 14°C (58°F) | 157 mm (6.2 inches) | 82% | very high |
May Weather | 21°C (69°F) | 123 mm (4.8 inches) | 82% | very high |
June Weather | 24°C (76°F) | 164 mm (6.5 inches) | 83% | extreme |
July Weather | 26°C (80°F) | 117 mm (4.6 inches) | 80% | extreme |
August Weather | 25°C (78°F) | 129 mm (5.1 inches) | 74% | very high |
September Weather | 23°C (73°F) | 129 mm (5.1 inches) | 71% | very high |
October Weather | 17°C (62°F) | 141 mm (5.6 inches) | 78% | high |
November Weather | 8°C (47°F) | 92 mm (3.6 inches) | 88% | moderate |
December Weather | 6°C (44°F) | 145 mm (5.7 inches) | 88% | moderate |