Last updated: August 23, 2025
In September, the average temperature in Nurmijaervi, Finland hovers around 11°C (53°F). Expect a range from a chilly -2°C (28°F) to a warm 24°C (75°F). With about 65 mm (2.6 in) of precipitation spread over 12 days, it's wise to keep an umbrella handy. Additionally, the average humidity sits at a notable 90%, giving the air a distinctly moist feel.
In September in Nurmijaervi, the average temperature is 11°C (53°F). The maximum can reach 24°C (75°F) and the minimum can be as low as -2°C (28°F). It's a perfect time for travelers to prepare for mild weather with some chilly evenings, making layers essential for comfort.
In Nurmijaervi in September, the precipitation amount is 65 mm (2.6 in) over the course of 12 days.
In Nurmijaervi in September, humidity is 90%. With an average temperature of 11°C (53°F), this humidity feels like a heavy cloak, making traveling feel sticky and exhausting, as the dampness clings to your skin and the chill in the air sharpens the discomfort, leaving you longing for a breath of fresh, dry air.
In Nurmijaervi 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 Nurmijaervi for better planning.
UV Risk Categories
Weather in Nurmijaervi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nurmijaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 53 mm (2.1 inches) | 97% | low |
| February Weather | -4°C (25°F) | 47 mm (1.8 inches) | 95% | low |
| March Weather | -1°C (30°F) | 50 mm (2.0 inches) | 93% | moderate |
| April Weather | 4°C (39°F) | 45 mm (1.8 inches) | 86% | moderate |
| May Weather | 10°C (51°F) | 56 mm (2.2 inches) | 75% | moderate |
| June Weather | 16°C (62°F) | 59 mm (2.3 inches) | 75% | high |
| July Weather | 18°C (64°F) | 83 mm (3.3 inches) | 80% | high |
| August Weather | 16°C (61°F) | 76 mm (3.0 inches) | 83% | moderate |
| September Weather | 11°C (53°F) | 65 mm (2.6 inches) | 90% | moderate |
| October Weather | 6°C (44°F) | 81 mm (3.2 inches) | 93% | low |
| November Weather | 2°C (37°F) | 55 mm (2.2 inches) | 94% | low |
| December Weather | -2°C (29°F) | 71 mm (2.8 inches) | 95% | low |