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May Weather in Napavine, United States

Last updated: June 24, 2025

In Napavine, United States, the average temperature in May is a mild 13°C (56°F), with extremes ranging from a chilly 1°C (34°F) to a warm 30°C (87°F). Expect 76 mm (3.0 in) of precipitation over approximately 11 days, resulting in an average humidity of 84%. Prepare for a month that balances refreshing coolness with sporadic warmth.

May Temperature in Napavine

In May in Napavine, the average temperature is 13°C (56°F), with maximums reaching 30°C (87°F) and minimums dropping as low as 1°C (34°F). This range makes it essential for travelers to pack for both warm and cool conditions.

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

The chart illustrates May temperature patterns in Napavine, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Napavine, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (87°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec414044495661656661504440
Data source: Temperature data for Napavine 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 Napavine

In Napavine in May, the total precipitation amount is 76 mm (3.0 in), recorded over a period of 11 days.

May Precipitation Trends in Napavine

The chart displays monthly precipitation patterns in Napavine, 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 Napavine, May typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1771591431217656111184125166193
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Napavine

In Napavine in May, humidity is 84%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it feel cooler and more uncomfortable for traveling, as the air clings to your skin and weighs you down with a sense of heaviness.

May Average Humidity in Napavine

This chart illustrates the average monthly humidity levels in Napavine, 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 Napavine is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%85%83%84%84%82%73%74%83%86%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Napavine

In Napavine in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Napavine.

Maximum UV Index Levels in Napavine for May

The chart shows the monthly maximum UV Index (UVI) for Napavine 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 Napavine typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356910987532
Data source: Napavine 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 Napavine Compares to Other Months

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

This table compares monthly weather conditions in Napavine, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)177 mm (7.0 inches)86%low
February Weather4°C (40°F)159 mm (6.3 inches)84%moderate
March Weather7°C (45°F)143 mm (5.6 inches)85%moderate
April Weather10°C (50°F)121 mm (4.7 inches)83%high
May Weather13°C (56°F)76 mm (3.0 inches)84%very high
June Weather16°C (61°F)56 mm (2.2 inches)84%very high
July Weather18°C (65°F)11 mm (0.4 inches)82%very high
August Weather19°C (66°F)11 mm (0.4 inches)73%very high
September Weather16°C (61°F)84 mm (3.3 inches)74%high
October Weather10°C (50°F)125 mm (4.9 inches)83%moderate
November Weather7°C (45°F)166 mm (6.5 inches)86%moderate
December Weather4°C (40°F)193 mm (7.6 inches)87%low

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