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April Weather in Sumner, United States

Last updated: June 24, 2025

In April, the average temperature in Sumner, United States hovers around 5°C (41°F), with minimums dipping as low as -12°C (11°F) and maximums climbing to 24°C (76°F). Expect 128 mm (5.0 in) of precipitation over approximately 13 days, contributing to a brisk average humidity of 84%.

April Temperature in Sumner

In April in Sumner, the average temperature is 5°C (41°F). Maximums can reach 24°C (76°F) and minimums can be as low as -12°C (11°F). Be prepared for a wide range of temperatures when traveling to Sumner this month.

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

The chart illustrates April temperature patterns in Sumner, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sumner, April typically has an average temperature of 5°C (41°F), with highs reaching up to 24°C (76°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec182128415363686760483423
Data source: Temperature data for Sumner 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 Sumner

In Sumner in April, the precipitation amount is 128 mm (5.0 in) spread over 13 days.

April Precipitation Trends in Sumner

The chart displays monthly precipitation patterns in Sumner, 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 Sumner, April typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec83867212887841339064128107120
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Sumner

In Sumner in April humidity is 84%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through the cold, heavy air that clings to your skin.

April Average Humidity in Sumner

This chart illustrates the average monthly humidity levels in Sumner, 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 Sumner is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Sumner

In Sumner in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sumner.

Maximum UV Index Levels in Sumner for April

The chart shows the monthly maximum UV Index (UVI) for Sumner 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 Sumner typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
Data source: Sumner 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 Sumner Compares to Other Months

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

This table compares monthly weather conditions in Sumner, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)83 mm (3.3 inches)91%low
February Weather-6°C (21°F)86 mm (3.4 inches)89%moderate
March Weather-2°C (29°F)72 mm (2.8 inches)85%moderate
April Weather5°C (41°F)128 mm (5.0 inches)84%very high
May Weather12°C (54°F)87 mm (3.4 inches)78%very high
June Weather17°C (64°F)84 mm (3.3 inches)72%very high
July Weather20°C (69°F)133 mm (5.2 inches)75%very high
August Weather19°C (67°F)90 mm (3.5 inches)74%very high
September Weather15°C (60°F)64 mm (2.5 inches)77%high
October Weather9°C (48°F)128 mm (5.0 inches)85%moderate
November Weather1°C (34°F)107 mm (4.2 inches)86%moderate
December Weather-5°C (23°F)120 mm (4.7 inches)85%low

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