Last updated: August 23, 2025
In April, the average temperature in Seinaejoki, Finland hovers around 3°C (38°F). Expect a wide range with minimums dropping to -16°C (4°F) and maximums soaring up to 21°C (71°F). This month also brings 44 mm (1.7 in) of precipitation over 11 days, contributing to an average humidity level of 85%.
In April in Seinaejoki, the average temperature is 3°C (38°F). Maximum temperatures can reach 21°C (71°F), while minimums can drop as low as -16°C (4°F). Visitors should be prepared for a wide range of temperatures and dress accordingly for their travels.
In Seinaejoki in April, the precipitation amount is 44 mm (1.7 in) during 11 days, indicating a relatively wet period for that time of year.
In Seinaejoki in April, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.
In Seinaejoki 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 Seinaejoki for better planning.
UV Risk Categories
Weather in Seinaejoki varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Seinaejoki, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (24°F) | 37 mm (1.4 inches) | 97% | low |
| February Weather | -5°C (22°F) | 39 mm (1.5 inches) | 95% | low |
| March Weather | -2°C (29°F) | 41 mm (1.6 inches) | 92% | moderate |
| April Weather | 3°C (38°F) | 44 mm (1.7 inches) | 85% | moderate |
| May Weather | 9°C (49°F) | 60 mm (2.3 inches) | 77% | moderate |
| June Weather | 15°C (60°F) | 61 mm (2.4 inches) | 74% | high |
| July Weather | 17°C (63°F) | 59 mm (2.3 inches) | 79% | high |
| August Weather | 15°C (59°F) | 90 mm (3.6 inches) | 82% | moderate |
| September Weather | 10°C (50°F) | 71 mm (2.8 inches) | 89% | moderate |
| October Weather | 5°C (41°F) | 75 mm (2.9 inches) | 93% | low |
| November Weather | 1°C (34°F) | 58 mm (2.3 inches) | 93% | low |
| December Weather | -3°C (28°F) | 47 mm (1.9 inches) | 95% | low |