Last updated: August 27, 2025
In Machen, United Kingdom, the average temperature in September is a mild 15°C (59°F). Expect minimums of 4°C (40°F) and delightful highs reaching up to 27°C (81°F). The region experiences 81 mm (3.2 in) of precipitation spread over about 12 days, contributing to an average humidity of 79%. Whether you’re bracing for a cool day or a warm one, be prepared for a bit of rain!
In September in Machen, the average temperature is 15°C (59°F). The maximum can reach 27°C (81°F), and the minimum can be as low as 4°C (40°F). This pleasant climate makes Machen an ideal destination for travelers seeking a mild escape.
In Machen in September, the precipitation amount is 81 mm (3.2 in) over a span of 12 days.
In Machen 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 Machen 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 Machen, you can refer to this Hourly UV Index in Machen.
UV Risk Categories
Weather in Machen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Machen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (42°F) | 75 mm (3.0 inches) | 88% | low |
| February Weather | 6°C (44°F) | 101 mm (4.0 inches) | 88% | low |
| March Weather | 7°C (45°F) | 97 mm (3.8 inches) | 86% | moderate |
| April Weather | 9°C (49°F) | 57 mm (2.2 inches) | 84% | high |
| May Weather | 12°C (54°F) | 79 mm (3.1 inches) | 80% | high |
| June Weather | 15°C (60°F) | 84 mm (3.3 inches) | 80% | very high |
| July Weather | 17°C (63°F) | 85 mm (3.3 inches) | 70% | very high |
| August Weather | 17°C (62°F) | 97 mm (3.8 inches) | 73% | high |
| September Weather | 15°C (59°F) | 81 mm (3.2 inches) | 79% | high |
| October Weather | 12°C (54°F) | 135 mm (5.3 inches) | 89% | moderate |
| November Weather | 9°C (48°F) | 99 mm (3.9 inches) | 90% | low |
| December Weather | 7°C (45°F) | 130 mm (5.1 inches) | 89% | low |