Last updated: August 27, 2025
In Bismo, Norway, the average temperature in September hovers around 5°C (42°F). Expect chilly days with temperatures dipping as low as -7°C (20°F) and peaking at 15°C (60°F). The month is quite wet, receiving an average precipitation of 109 mm (4.3 in) over 19 days, and you'll feel the dampness with an average humidity of 92%. Make sure to bundle up and be prepared for some rainy spells!
In September in Bismo, the average temperature is 5°C (42°F). Maximums can reach 15°C (60°F) and minimums can be as low as -7°C (20°F). Travelers should prepare for a mix of chilly days and mild afternoons, ensuring they pack layers for varying conditions.
In Bismo in September, the precipitation amount is 109 mm (4.3 in) over the course of 19 days.
In Bismo in September, humidity is 92%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
In Bismo in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Bismo for better planning.
UV Risk Categories
Weather in Bismo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bismo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 94 mm (3.7 inches) | 99% | low |
| February Weather | -8°C (18°F) | 62 mm (2.4 inches) | 97% | low |
| March Weather | -6°C (21°F) | 82 mm (3.2 inches) | 94% | moderate |
| April Weather | -3°C (28°F) | 75 mm (2.9 inches) | 89% | moderate |
| May Weather | 3°C (37°F) | 62 mm (2.4 inches) | 85% | high |
| June Weather | 9°C (49°F) | 86 mm (3.4 inches) | 82% | high |
| July Weather | 11°C (52°F) | 93 mm (3.7 inches) | 84% | high |
| August Weather | 9°C (49°F) | 108 mm (4.3 inches) | 89% | moderate |
| September Weather | 5°C (42°F) | 109 mm (4.3 inches) | 92% | moderate |
| October Weather | 0°C (33°F) | 124 mm (4.9 inches) | 96% | low |
| November Weather | -4°C (24°F) | 87 mm (3.4 inches) | 97% | low |
| December Weather | -7°C (19°F) | 97 mm (3.8 inches) | 99% | low |