May Weather in Tretten, Norway

Last updated: August 27, 2025

In May, the average temperature in Tretten, Norway hovers around 7°C (44°F). However, it can swing between a chilly minimum of -10°C (14°F) and a warm maximum of 25°C (78°F). Expect 84 mm (3.3 in) of precipitation spread over 14 days, contributing to a notably high average humidity of 84%.

May Temperature in Tretten

In May in Tretten, the average temperature is 7°C (44°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their trip.

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

The chart illustrates May temperature patterns in Tretten, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tretten, May typically has an average temperature of 7°C (44°F), with highs reaching up to 25°C (78°F) and lows dropping to around -10°C (14°F).

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

May Precipitation in Tretten

In Tretten in May, the precipitation amount is 84 mm (3.3 in) over the course of 14 days.

May Precipitation Trends in Tretten

The chart displays monthly precipitation patterns in Tretten, 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 Tretten, May typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 14 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 Tretten

In Tretten in May humidity is 84%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it uncomfortable for traveling and requiring extra layers to stay warm and dry.

May Average Humidity in Tretten

This chart illustrates the average monthly humidity levels in Tretten, 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 Tretten is approximately 84%, 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 Tretten

In Tretten in May, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Tretten, you can refer to this Hourly UV Index in Tretten.

Maximum UV Index Levels in Tretten for May

The chart shows the monthly maximum UV Index (UVI) for Tretten 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 Tretten typically reaches 6, which falls under the high exposure category.

Data source: Tretten 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 Tretten Compares to Other Months

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

This table compares monthly weather conditions in Tretten, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	53 mm (2.1 inches)	98%	low
February Weather	-7°C (20°F)	51 mm (2.0 inches)	95%	low
March Weather	-3°C (27°F)	52 mm (2.0 inches)	92%	moderate
April Weather	1°C (34°F)	34 mm (1.3 inches)	88%	moderate
May Weather	7°C (44°F)	84 mm (3.3 inches)	84%	high
June Weather	13°C (55°F)	98 mm (3.8 inches)	82%	high
July Weather	14°C (57°F)	100 mm (3.9 inches)	82%	high
August Weather	12°C (54°F)	127 mm (5.0 inches)	87%	moderate
September Weather	8°C (46°F)	95 mm (3.8 inches)	91%	moderate
October Weather	3°C (37°F)	116 mm (4.6 inches)	95%	low
November Weather	-3°C (28°F)	88 mm (3.5 inches)	97%	low
December Weather	-7°C (20°F)	83 mm (3.3 inches)	98%	low