April Weather in Lammi, Finland

Last updated: August 23, 2025

In April, the average temperature in Lammi, Finland hovers around 3°C (38°F), but be prepared for temperature swings—ranging from a chilly -13°C (8°F) to a warm 22°C (71°F). During this month, you'll encounter approximately 47 mm (1.8 in) of precipitation over 12 days, with an average humidity level of 86% ensuring a damp but refreshing atmosphere.

April Temperature in Lammi

In April in Lammi, the average temperature is 3°C (38°F). The maximum can reach 22°C (71°F), while the minimum can drop as low as -13°C (8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

April Weather in Lammi: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Lammi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lammi, April typically has an average temperature of 3°C (38°F), with highs reaching up to 22°C (71°F) and lows dropping to around -13°C (8°F).

Data source: Temperature data for Lammi generated using information from the Copernicus Climate Change Service.

April Precipitation in Lammi

In Lammi in April, the precipitation amount is 47 mm (1.8 in) over a period of 12 days.

April Precipitation Trends in Lammi

The chart displays monthly precipitation patterns in Lammi, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Lammi, April typically receives around 47 mm (1.8 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Lammi

In Lammi in April humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

April Average Humidity in Lammi

This chart illustrates the average monthly humidity levels in Lammi, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Lammi is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Lammi

In Lammi 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 Lammi for better planning.

Maximum UV Index Levels in Lammi for April

The chart shows the monthly maximum UV Index (UVI) for Lammi in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Lammi typically reaches 4, which falls under the moderate exposure category.

Data source: Lammi April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Lammi Compares to Other Months

Weather in Lammi varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Lammi, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lammi, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	48 mm (1.9 inches)	97%	low
February Weather	-5°C (24°F)	42 mm (1.7 inches)	95%	low
March Weather	-2°C (29°F)	44 mm (1.7 inches)	93%	moderate
April Weather	3°C (38°F)	47 mm (1.8 inches)	86%	moderate
May Weather	10°C (50°F)	58 mm (2.3 inches)	75%	moderate
June Weather	16°C (61°F)	69 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	83 mm (3.3 inches)	80%	high
August Weather	16°C (61°F)	81 mm (3.2 inches)	83%	moderate
September Weather	11°C (52°F)	67 mm (2.6 inches)	90%	moderate
October Weather	6°C (43°F)	78 mm (3.1 inches)	93%	low
November Weather	2°C (36°F)	53 mm (2.1 inches)	94%	low
December Weather	-2°C (28°F)	67 mm (2.6 inches)	95%	low