May Weather in Lammi, Finland

Last updated: August 23, 2025

In Lammi, Finland, the average temperature in May hovers around 10°C (50°F). However, be prepared for a range of conditions, as temperatures can dip to a chilly -4°C (25°F) or soar to a balmy 28°C (83°F). Expect 58 mm (2.3 in) of precipitation spread over about 10 days, accompanied by a comfortable average humidity of 75%.

May Temperature in Lammi

In May in Lammi, the average temperature is 10°C (50°F). Maximums can reach 28°C (83°F), and minimums can be as low as -4°C (25°F). This variability makes it essential to pack for both warm and cold weather when traveling to Lammi during this month.

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

The chart illustrates May 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, May typically has an average temperature of 10°C (50°F), with highs reaching up to 28°C (83°F) and lows dropping to around -4°C (25°F).

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

May Precipitation in Lammi

In Lammi in May, the total precipitation amount is 58 mm (2.3 in), measured over a span of 10 days.

May Precipitation Trends in Lammi

The chart displays monthly precipitation patterns in Lammi, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Lammi, May typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Lammi

In Lammi in May humidity is 75%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and necessitating extra layers for warmth and comfort.

May Average Humidity in Lammi

This chart illustrates the average monthly humidity levels in Lammi, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Lammi is approximately 75%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Lammi

In Lammi in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Lammi.

Maximum UV Index Levels in Lammi for May

The chart shows the monthly maximum UV Index (UVI) for Lammi in May, 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 May, the maximum UV index in Lammi typically reaches 5, which falls under the moderate exposure category.

Data source: Lammi May 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 May 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 May’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 May’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