Last updated: August 27, 2025
In Ottery St Mary, United Kingdom, the average temperature in September hovers around 15°C (59°F), with a pleasant range between 3°C (38°F) and 27°C (81°F). Expect about 45 mm (1.8 in) of precipitation spread over 8 days, contributing to an average humidity of 79%. Whether you're enjoying a brisk morning or a warm afternoon, the climate offers a blend of comfort and unpredictability.
In September in Ottery St Mary, the average temperature is 15°C (59°F), with a maximum that can reach 27°C (81°F) and a minimum as low as 3°C (38°F). This makes it an ideal time for travelers who enjoy mild weather and the opportunity to explore both warm and cooler conditions.
In Ottery St Mary in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.
In Ottery St Mary 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 Ottery St Mary 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 Ottery St Mary, you can refer to this Hourly UV Index in Ottery St Mary.
UV Risk Categories
Weather in Ottery St Mary varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ottery St Mary, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 46 mm (1.8 inches) | 88% | low |
| February Weather | 7°C (44°F) | 60 mm (2.4 inches) | 88% | low |
| March Weather | 8°C (46°F) | 75 mm (2.9 inches) | 86% | moderate |
| April Weather | 9°C (49°F) | 48 mm (1.9 inches) | 84% | high |
| May Weather | 12°C (54°F) | 69 mm (2.7 inches) | 80% | high |
| June Weather | 16°C (60°F) | 73 mm (2.9 inches) | 80% | very high |
| July Weather | 18°C (64°F) | 59 mm (2.3 inches) | 70% | very high |
| August Weather | 17°C (62°F) | 70 mm (2.7 inches) | 73% | high |
| September Weather | 15°C (59°F) | 45 mm (1.8 inches) | 79% | high |
| October Weather | 12°C (54°F) | 97 mm (3.8 inches) | 89% | moderate |
| November Weather | 9°C (48°F) | 61 mm (2.4 inches) | 90% | low |
| December Weather | 8°C (46°F) | 88 mm (3.4 inches) | 89% | low |