Last updated: August 27, 2025
The average temperature in Rena, Norway during September is a cool 9°C (48°F), with minimums dipping as low as -2°C (29°F) and maximums soaring up to 23°C (74°F). Be prepared for precipitation, with about 103 mm (4.0 in) expected over 15 days. Additionally, the average humidity is quite high at 91%, creating a unique atmosphere throughout the month.
In September in Rena, the average temperature is 9°C (48°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop as low as -2°C (29°F). It's advisable to pack layers to accommodate the varying temperatures when traveling to Rena during this time.
In Rena in September, the precipitation amount is 103 mm (4.0 in) that falls over a span of 15 days.
In Rena in September, humidity is 91%. With an average temperature of 9°C (48°F), this humidity feels like a chilly embrace, making travel quite uncomfortable as the dampness permeates clothing and hangs heavy in the air, leading to a pervasive chill that lingers long after you've stepped outside.
In Rena 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 Rena for better planning.
UV Risk Categories
Weather in Rena varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rena, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (21°F) | 57 mm (2.2 inches) | 98% | low |
| February Weather | -6°C (22°F) | 54 mm (2.1 inches) | 95% | low |
| March Weather | -2°C (28°F) | 56 mm (2.2 inches) | 92% | moderate |
| April Weather | 2°C (36°F) | 33 mm (1.3 inches) | 88% | moderate |
| May Weather | 8°C (47°F) | 87 mm (3.4 inches) | 84% | moderate |
| June Weather | 14°C (57°F) | 103 mm (4.1 inches) | 82% | high |
| July Weather | 15°C (59°F) | 101 mm (4.0 inches) | 82% | high |
| August Weather | 13°C (55°F) | 116 mm (4.6 inches) | 87% | moderate |
| September Weather | 9°C (48°F) | 103 mm (4.0 inches) | 91% | moderate |
| October Weather | 4°C (39°F) | 124 mm (4.9 inches) | 95% | low |
| November Weather | -1°C (31°F) | 103 mm (4.1 inches) | 97% | low |
| December Weather | -6°C (22°F) | 89 mm (3.5 inches) | 98% | low |