Last updated: August 27, 2025
In September, the average temperature in Blackburn, United Kingdom hovers around 13°C (56°F). Expect a minimum of 1°C (35°F) and a maximum of 27°C (81°F), making it a month of notable temperature variation. Be prepared for 111 mm (4.4 in) of precipitation spread over 16 days, alongside an average humidity level of 85%.
In September in Blackburn, the average temperature is 13°C (56°F). Maximum temperatures can reach 27°C (81°F), while the minimum can drop as low as 1°C (35°F). Travelers should be prepared for a range of weather conditions and pack accordingly.
In Blackburn in September, the precipitation amount is 111 mm (4.4 in) occurring over the course of 16 days.
In Blackburn in September humidity is 85%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that wraps around you, making outdoor activities feel heavier and less enjoyable, as layers of clothing cling to the skin and breath becomes visible in the moist air.
In Blackburn 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 Blackburn.
UV Risk Categories
Weather in Blackburn varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Blackburn, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (40°F) | 87 mm (3.4 inches) | 89% | low |
| February Weather | 5°C (42°F) | 122 mm (4.8 inches) | 88% | low |
| March Weather | 6°C (44°F) | 122 mm (4.8 inches) | 86% | moderate |
| April Weather | 8°C (47°F) | 53 mm (2.1 inches) | 84% | moderate |
| May Weather | 11°C (53°F) | 71 mm (2.8 inches) | 79% | high |
| June Weather | 15°C (58°F) | 107 mm (4.2 inches) | 81% | very high |
| July Weather | 16°C (61°F) | 114 mm (4.5 inches) | 78% | very high |
| August Weather | 15°C (60°F) | 140 mm (5.5 inches) | 79% | high |
| September Weather | 13°C (56°F) | 111 mm (4.4 inches) | 85% | moderate |
| October Weather | 10°C (51°F) | 141 mm (5.5 inches) | 90% | moderate |
| November Weather | 7°C (46°F) | 108 mm (4.2 inches) | 91% | low |
| December Weather | 5°C (42°F) | 129 mm (5.1 inches) | 89% | low |