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April Weather in Napavine, United States

Last updated: June 24, 2025

In April, the average temperature in Napavine, United States hovers around 10°C (50°F). Expect a minimum chill of -3°C (28°F) and a pleasant maximum of 29°C (84°F). With 121 mm (4.7 in) of rainfall spread over 15 days, it's wise to carry an umbrella. Additionally, the air is quite damp with an average humidity of 83%, creating a cozy atmosphere.

April Temperature in Napavine

In April in Napavine, the average temperature is 10°C (50°F). Maximum temperatures can reach 29°C (84°F), while the minimum can drop to as low as -3°C (28°F). Be prepared for a wide range of temperatures to make the most of your trip!

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

The chart illustrates April 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, April typically has an average temperature of 10°C (50°F), with highs reaching up to 29°C (84°F) and lows dropping to around -3°C (28°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.

April Precipitation in Napavine

In Napavine in April, the precipitation amount is 121 mm (4.7 in) over a period of 15 days.

April Precipitation Trends in Napavine

The chart displays monthly precipitation patterns in Napavine, 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 Napavine, April typically receives around 121 mm (4.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec1771591431217656111184125166193
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Napavine

In Napavine in April, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

April Average Humidity in Napavine

This chart illustrates the average monthly humidity levels in Napavine, 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 Napavine is approximately 83%, 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 April generated using information from the Copernicus Climate Change Service.

April UV Index in Napavine

In Napavine in April, 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 Napavine, you can refer to this Hourly UV Index in Napavine.

Maximum UV Index Levels in Napavine for April

The chart shows the monthly maximum UV Index (UVI) for Napavine 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 Napavine typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356910987532
Data source: Napavine 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 Napavine Compares to Other Months

Weather in Napavine varies notably across the year, with each month offering distinct climate conditions. This page compares April’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 April’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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