Last updated: August 23, 2025
In Jaerva-Jaani, Estonia, the average temperature in September hovers around 12°C (54°F), with a minimum dipping to -1°C (31°F) and a maximum peaking at 25°C (77°F). Expect 69 mm (2.7 in) of precipitation spread over 12 days, along with a high average humidity of 89% that adds to the region's unique climate experience.
In September in Jaerva-Jaani, the average temperature is 12°C (54°F). Maximum temperatures can reach 25°C (77°F), while the minimum can drop as low as -1°C (31°F). Travelers should prepare for a wide range of temperatures when visiting during this time.
In Jaerva-Jaani in September, the precipitation amount is 69 mm (2.7 in) over the span of 12 days.
In Jaerva-Jaani in September humidity is 89%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that envelops you, making travels slightly uncomfortable as you navigate through a thick, moist air that can cling to your skin and steal your warmth.
In Jaerva-Jaani 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 Jaerva-Jaani for better planning.
UV Risk Categories
Weather in Jaerva-Jaani varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jaerva-Jaani, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 42 mm (1.7 inches) | 95% | low |
| February Weather | -3°C (26°F) | 46 mm (1.8 inches) | 93% | low |
| March Weather | -1°C (31°F) | 49 mm (1.9 inches) | 90% | moderate |
| April Weather | 4°C (40°F) | 47 mm (1.8 inches) | 87% | moderate |
| May Weather | 10°C (51°F) | 52 mm (2.1 inches) | 73% | moderate |
| June Weather | 16°C (61°F) | 66 mm (2.6 inches) | 77% | high |
| July Weather | 17°C (64°F) | 71 mm (2.8 inches) | 80% | high |
| August Weather | 16°C (61°F) | 99 mm (3.9 inches) | 84% | high |
| September Weather | 12°C (54°F) | 69 mm (2.7 inches) | 89% | moderate |
| October Weather | 7°C (45°F) | 81 mm (3.2 inches) | 92% | low |
| November Weather | 3°C (37°F) | 55 mm (2.2 inches) | 93% | low |
| December Weather | -2°C (29°F) | 59 mm (2.3 inches) | 93% | low |