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May Weather in Porsgrunn, Norway

Last updated: August 27, 2025

In May, the average temperature in Porsgrunn, Norway hovers around 10°C (51°F). However, temperatures can vary dramatically, with a minimum of -4°C (25°F) and a maximum reaching up to 27°C (82°F). Expect about 86 mm (3.4 in) of precipitation over 11 days, contributing to an average humidity of 75%.

May Temperature in Porsgrunn

In May in Porsgrunn, the average temperature is 10°C (51°F), with maximums reaching 27°C (82°F) and minimums dropping as low as -4°C (25°F). This diverse temperature range makes it essential for travelers to pack accordingly to ensure comfort throughout their adventures.

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

The chart illustrates May temperature patterns in Porsgrunn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porsgrunn, May typically has an average temperature of 10°C (51°F), with highs reaching up to 27°C (82°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec303034415160636054453731
Data source: Temperature data for Porsgrunn generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Porsgrunn

In Porsgrunn in May, the precipitation amount is 86 mm (3.4 in), spread over 11 days.

May Precipitation Trends in Porsgrunn

The chart displays monthly precipitation patterns in Porsgrunn, 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 Porsgrunn, May typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec76797939869410494126137116130
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Porsgrunn

In Porsgrunn in May humidity is 75%. With an average temperature of 10°C (51°F), this humidity feels like a heavy blanket wrapping around you, making every step outside feel laborious and damp, perfect for cozy indoor exploration but challenging for outdoor adventures.

May Average Humidity in Porsgrunn

This chart illustrates the average monthly humidity levels in Porsgrunn, 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 Porsgrunn is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%91%88%83%75%74%74%78%86%92%92%92%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Porsgrunn

In Porsgrunn 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 Porsgrunn.

Maximum UV Index Levels in Porsgrunn for May

The chart shows the monthly maximum UV Index (UVI) for Porsgrunn 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 Porsgrunn typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Porsgrunn 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 Porsgrunn Compares to Other Months

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

This table compares monthly weather conditions in Porsgrunn, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)76 mm (3.0 inches)93%low
February Weather-1°C (30°F)79 mm (3.1 inches)91%low
March Weather1°C (35°F)79 mm (3.1 inches)88%moderate
April Weather5°C (42°F)39 mm (1.5 inches)83%moderate
May Weather10°C (51°F)86 mm (3.4 inches)75%moderate
June Weather16°C (60°F)94 mm (3.7 inches)74%high
July Weather17°C (63°F)104 mm (4.1 inches)74%high
August Weather16°C (60°F)94 mm (3.7 inches)78%moderate
September Weather12°C (54°F)126 mm (5.0 inches)86%moderate
October Weather7°C (46°F)137 mm (5.4 inches)92%low
November Weather3°C (38°F)116 mm (4.6 inches)92%low
December Weather-1°C (31°F)130 mm (5.1 inches)92%low

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