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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 13°C (56°F), with a minimum dipping as low as -4°C (25°F) and a maximum reaching 29°C (85°F). Expect 120 mm (4.7 in) of precipitation spread over about 11 days, contributing to an elevated average humidity of 83%. Prepare for a month marked by variable temperatures and ample moisture!

April Temperature in Sumner

In April in Sumner, the average temperature is 13°C (56°F). The maximum can reach 29°C (85°F), while the minimum can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures when planning your trip!

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 13°C (56°F), with highs reaching up to 29°C (85°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec333646556877797672604439
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 120 mm (4.7 in) during a span of 11 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 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9110713312013311297927010010295
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 83%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable as the air feels heavy and the moisture 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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111099643
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 Weather1°C (33°F)91 mm (3.6 inches)84%moderate
February Weather2°C (37°F)107 mm (4.2 inches)82%moderate
March Weather8°C (47°F)133 mm (5.2 inches)84%high
April Weather13°C (56°F)120 mm (4.7 inches)83%very high
May Weather20°C (68°F)133 mm (5.3 inches)80%very high
June Weather25°C (77°F)112 mm (4.4 inches)83%extreme
July Weather26°C (80°F)97 mm (3.8 inches)82%very high
August Weather25°C (77°F)92 mm (3.6 inches)82%very high
September Weather22°C (73°F)70 mm (2.7 inches)79%very high
October Weather16°C (60°F)100 mm (3.9 inches)79%high
November Weather7°C (44°F)102 mm (4.0 inches)88%moderate
December Weather4°C (39°F)95 mm (3.7 inches)87%moderate

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