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August Weather in Sumner, United States

Last updated: June 24, 2025

In August, the average temperature in Sumner, United States hovers around 25°C (77°F), offering a comfortable climate. Minimum temperatures can drop to a refreshing 13°C (55°F), while maximums can soar to a warm 35°C (96°F). Expect some moisture, with an average precipitation amount of 92 mm (3.6 in) spread over 10 days, contributing to a notably high humidity level of 82%.

August Temperature in Sumner

In August in Sumner, the average temperature is 25°C (77°F). Maximums can reach 35°C (96°F) and minimums can be as low as 13°C (55°F). This pleasant climate makes Sumner an ideal destination for travelers seeking both warmth and comfortable temperatures.

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

The chart illustrates August 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, August typically has an average temperature of 25°C (77°F), with highs reaching up to 35°C (96°F) and lows dropping to around 13°C (55°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.

August Precipitation in Sumner

In Sumner in August, the total precipitation amount is 92 mm (3.6 in), which falls over the course of 10 days.

August Precipitation Trends in Sumner

The chart displays monthly precipitation patterns in Sumner, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Sumner, August typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec9110713312013311297927010010295
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sumner

In Sumner in August, humidity is 82%. With an average temperature of 25°C (77°F), this humidity feels like a warm, oppressive blanket enveloping you as you explore, making every step feel more laborious and prompting the need for frequent hydration breaks.

August Average Humidity in Sumner

This chart illustrates the average monthly humidity levels in Sumner, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Sumner is approximately 82%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Sumner

In Sumner in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Sumner in August, 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 August, the maximum UV index in Sumner typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111099643
Data source: Sumner August 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 August 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 August’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 August’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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