Last updated: August 27, 2025
In September, the average temperature in Ilminster, United Kingdom hovers around 15°C (59°F), with lows dipping to 2°C (36°F) and highs reaching up to 28°C (83°F). Expect about 48 mm (1.9 in) of precipitation spread over 9 days, contributing to a notable average humidity of 79%. Whether you're bracing for a cool breeze or the occasional shower, be prepared for a typical temperate climate!
In September in Ilminster, the average temperature is 15°C (59°F). Maximums can reach 28°C (83°F), and minimums can be as low as 2°C (36°F). This range makes it a great time for travelers to enjoy a mix of pleasant days and cooler evenings, so packing layers is advisable.
In Ilminster in September, the total precipitation amount is 48 mm (1.9 in) spread over 9 days.
In Ilminster in September humidity is 79%. With an average temperature of 15°C (59°F), this humidity feels like a muggy embrace that clings to your skin, making outdoor activities somewhat uncomfortable. Travelers may find themselves frequently seeking shelter or refreshing drinks to combat the warm, damp air, as the moisture in the atmosphere feels particularly heavy, especially during longer excursions.
In Ilminster in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Ilminster, you can refer to this Hourly UV Index in Ilminster.
UV Risk Categories
Weather in Ilminster varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ilminster, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (42°F) | 50 mm (2.0 inches) | 88% | low |
| February Weather | 6°C (44°F) | 60 mm (2.4 inches) | 88% | low |
| March Weather | 7°C (46°F) | 76 mm (3.0 inches) | 86% | moderate |
| April Weather | 9°C (49°F) | 53 mm (2.1 inches) | 84% | high |
| May Weather | 12°C (54°F) | 70 mm (2.8 inches) | 80% | high |
| June Weather | 16°C (61°F) | 79 mm (3.1 inches) | 80% | very high |
| July Weather | 18°C (64°F) | 64 mm (2.5 inches) | 70% | very high |
| August Weather | 17°C (62°F) | 76 mm (3.0 inches) | 73% | high |
| September Weather | 15°C (59°F) | 48 mm (1.9 inches) | 79% | high |
| October Weather | 12°C (53°F) | 95 mm (3.7 inches) | 89% | moderate |
| November Weather | 8°C (47°F) | 58 mm (2.3 inches) | 90% | low |
| December Weather | 7°C (45°F) | 86 mm (3.4 inches) | 89% | low |