Last updated: August 23, 2025
In Siilinjaervi, Finland, the average temperature in April hovers around 2°C (35°F). However, be prepared for a wide range, as temperatures can dip as low as -15°C (5°F) or rise to a pleasant 21°C (69°F). During this month, expect an average precipitation of 42 mm (1.6 in) spread over 9 days, and don't forget your umbrella—humidity levels are typically high at 87%!
In April in Siilinjaervi, the average temperature is 2°C (35°F). Maximums can reach 21°C (69°F), while minimums can drop as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Siilinjaervi in April, the precipitation amount is 42 mm (1.6 in) over the course of 9 days.
In Siilinjaervi in April, humidity is 87%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling feel uncomfortable and heavy, as each breath carries a hint of the cold, moist air that lingers around you.
In Siilinjaervi 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 Siilinjaervi for better planning.
UV Risk Categories
Weather in Siilinjaervi varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Siilinjaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 49 mm (1.9 inches) | 99% | low |
| February Weather | -7°C (19°F) | 43 mm (1.7 inches) | 98% | low |
| March Weather | -3°C (26°F) | 43 mm (1.7 inches) | 95% | moderate |
| April Weather | 2°C (35°F) | 42 mm (1.6 inches) | 87% | moderate |
| May Weather | 8°C (47°F) | 56 mm (2.2 inches) | 78% | moderate |
| June Weather | 15°C (60°F) | 66 mm (2.6 inches) | 75% | high |
| July Weather | 17°C (64°F) | 84 mm (3.3 inches) | 83% | high |
| August Weather | 15°C (60°F) | 103 mm (4.0 inches) | 88% | moderate |
| September Weather | 10°C (50°F) | 91 mm (3.6 inches) | 92% | moderate |
| October Weather | 5°C (41°F) | 84 mm (3.3 inches) | 95% | low |
| November Weather | 1°C (33°F) | 77 mm (3.0 inches) | 94% | low |
| December Weather | -4°C (25°F) | 68 mm (2.7 inches) | 98% | low |