Last updated: August 27, 2025
In September, the average temperature in Bellingham, United Kingdom hovers around 12°C (54°F), with temperatures ranging from a cool 2°C (36°F) to a warm 26°C (79°F). Expect about 67 mm (2.6 in) of precipitation spread over 14 days, leading to an average humidity level of 87%. Be prepared for a mix of weather as you explore this vibrant locale!
In September in Bellingham, the average temperature is 12°C (54°F). Maximums can reach 26°C (79°F), and minimums can be as low as 2°C (36°F). This makes it a great time to explore Bellingham, as you can enjoy pleasant days while being prepared for cooler evenings.
In Bellingham in September, the precipitation amount is 67 mm (2.6 in) spread over 14 days.
In Bellingham in September humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.
In Bellingham 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 Bellingham.
UV Risk Categories
Weather in Bellingham varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bellingham, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (39°F) | 56 mm (2.2 inches) | 89% | low |
| February Weather | 4°C (39°F) | 92 mm (3.6 inches) | 87% | low |
| March Weather | 5°C (42°F) | 82 mm (3.2 inches) | 85% | moderate |
| April Weather | 7°C (45°F) | 37 mm (1.4 inches) | 84% | moderate |
| May Weather | 10°C (51°F) | 62 mm (2.4 inches) | 83% | high |
| June Weather | 13°C (56°F) | 85 mm (3.3 inches) | 85% | very high |
| July Weather | 15°C (59°F) | 87 mm (3.4 inches) | 83% | very high |
| August Weather | 14°C (58°F) | 100 mm (3.9 inches) | 82% | high |
| September Weather | 12°C (54°F) | 67 mm (2.6 inches) | 87% | moderate |
| October Weather | 9°C (49°F) | 97 mm (3.8 inches) | 89% | moderate |
| November Weather | 6°C (43°F) | 71 mm (2.8 inches) | 90% | low |
| December Weather | 4°C (40°F) | 75 mm (3.0 inches) | 88% | low |