Last updated: August 27, 2025
In September, the average temperature in Newtown St Boswells, United Kingdom hovers around 12°C (53°F). You can expect temperatures to range from a chilly 1°C (35°F) at night to a pleasant 26°C (80°F) during the day. Throughout the month, the area sees around 69 mm (2.7 in) of precipitation spread over 13 days, accompanied by a high average humidity of 88%.
In September in Newtown St Boswells, the average temperature is 12°C (53°F). Maximums can reach 26°C (80°F) and minimums can be as low as 1°C (35°F). This variety in temperatures makes it advisable to pack layers for your trip.
In Newtown St Boswells in September, the precipitation amount is 69 mm (2.7 in) over the course of 13 days.
In Newtown St Boswells in September humidity is 88%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that clings to your skin, making it crucial to dress in layers and stay prepared for the discomfort while exploring.
In Newtown St Boswells in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Newtown St Boswells.
UV Risk Categories
Weather in Newtown St Boswells varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Newtown St Boswells, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 58 mm (2.3 inches) | 90% | low |
| February Weather | 4°C (39°F) | 100 mm (4.0 inches) | 88% | low |
| March Weather | 5°C (41°F) | 88 mm (3.5 inches) | 86% | moderate |
| April Weather | 7°C (44°F) | 39 mm (1.5 inches) | 85% | moderate |
| May Weather | 10°C (50°F) | 64 mm (2.5 inches) | 80% | high |
| June Weather | 13°C (55°F) | 90 mm (3.6 inches) | 83% | very high |
| July Weather | 15°C (59°F) | 91 mm (3.6 inches) | 82% | very high |
| August Weather | 14°C (57°F) | 108 mm (4.3 inches) | 82% | high |
| September Weather | 12°C (53°F) | 69 mm (2.7 inches) | 88% | moderate |
| October Weather | 9°C (48°F) | 99 mm (3.9 inches) | 90% | moderate |
| November Weather | 6°C (42°F) | 71 mm (2.8 inches) | 92% | low |
| December Weather | 4°C (39°F) | 76 mm (3.0 inches) | 89% | low |