Last updated: August 23, 2025
In April, the average temperature in Koski Tl, Finland hovers around 4°C (39°F), but brace yourself for a range that can swing from a chilling -14°C (8°F) to a mild 21°C (70°F). With an average humidity of 86%, the air feels quite damp, and you can expect around 41 mm (1.6 in) of precipitation spread over 11 days.
In April in Koski Tl, the average temperature is 4°C (39°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -14°C (8°F). Travelers should be prepared for a wide temperature range during this time.
In Koski Tl in April, the precipitation amount is 41 mm (1.6 in) over the course of 11 days.
In Koski Tl in April humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.
In Koski Tl in April, 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 Koski Tl for better planning.
UV Risk Categories
Weather in Koski Tl varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Koski Tl, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 49 mm (1.9 inches) | 97% | low |
| February Weather | -4°C (25°F) | 44 mm (1.7 inches) | 95% | low |
| March Weather | -1°C (30°F) | 46 mm (1.8 inches) | 93% | moderate |
| April Weather | 4°C (39°F) | 41 mm (1.6 inches) | 86% | moderate |
| May Weather | 10°C (50°F) | 59 mm (2.3 inches) | 75% | moderate |
| June Weather | 16°C (62°F) | 59 mm (2.3 inches) | 75% | high |
| July Weather | 17°C (64°F) | 83 mm (3.3 inches) | 80% | high |
| August Weather | 16°C (61°F) | 88 mm (3.5 inches) | 83% | moderate |
| September Weather | 11°C (52°F) | 62 mm (2.4 inches) | 90% | moderate |
| October Weather | 6°C (43°F) | 77 mm (3.0 inches) | 93% | low |
| November Weather | 2°C (37°F) | 52 mm (2.1 inches) | 94% | low |
| December Weather | -2°C (30°F) | 67 mm (2.6 inches) | 95% | low |