Last updated: August 27, 2025
In September, the average temperature in Kotlas, Russian Federation hovers around 9°C (48°F). Expect a chilly minimum of -3°C (27°F), while the mercury can rise to a pleasant 23°C (74°F) on warmer days. With 78 mm (3.1 in) of precipitation spread over 13 days, you might encounter some rain, so be prepared! Overall, the atmosphere is quite humid, with an average humidity level of 92%.
In September in Kotlas, the average temperature is 9°C (48°F). The maximum can reach 23°C (74°F), and the minimum can be as low as -3°C (27°F). Be sure to pack layers to enjoy both the warm days and chilly nights during your travels.
In Kotlas in September, the precipitation amount is 78 mm (3.1 in) spread over 13 days.
In Kotlas in September humidity is 92%. With an average temperature of 9°C (48°F), this humidity feels like a heavy blanket enveloping you, making outdoor exploration quite challenging due to the stickiness in the air and the constant dampness that clings to your skin.
In Kotlas 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 Kotlas for better planning.
UV Risk Categories
Weather in Kotlas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kotlas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (14°F) | 39 mm (1.6 inches) | 101% | low |
| February Weather | -10°C (15°F) | 43 mm (1.7 inches) | 98% | low |
| March Weather | -4°C (24°F) | 40 mm (1.6 inches) | 93% | moderate |
| April Weather | 2°C (37°F) | 36 mm (1.4 inches) | 86% | moderate |
| May Weather | 9°C (49°F) | 61 mm (2.4 inches) | 83% | moderate |
| June Weather | 15°C (59°F) | 66 mm (2.6 inches) | 81% | high |
| July Weather | 18°C (65°F) | 107 mm (4.2 inches) | 83% | high |
| August Weather | 15°C (59°F) | 75 mm (3.0 inches) | 87% | moderate |
| September Weather | 9°C (48°F) | 78 mm (3.1 inches) | 92% | moderate |
| October Weather | 4°C (39°F) | 80 mm (3.1 inches) | 94% | low |
| November Weather | -3°C (28°F) | 62 mm (2.4 inches) | 97% | low |
| December Weather | -8°C (18°F) | 51 mm (2.0 inches) | 96% | low |