August Weather in Mattawa, United States

Last updated: June 24, 2025

In Mattawa, United States, the average temperature in August hovers around 25°C (77°F), with a minimum of 10°C (51°F) and a maximum of 41°C (105°F). Expect light precipitation of about 5 mm (0.2 in) over the course of 1 day. The climate features an average humidity level of 63%, making it a comfortable yet slightly humid experience.

August Temperature in Mattawa

In August in Mattawa, the average temperature is 25°C (77°F). Maximums can reach 41°C (105°F) and minimums can be as low as 10°C (51°F). It's a great time to explore the local attractions, but be prepared for the possibility of hot days and cooler evenings.

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

The chart illustrates August temperature patterns in Mattawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mattawa, August typically has an average temperature of 25°C (77°F), with highs reaching up to 41°C (105°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Mattawa generated using information from the Copernicus Climate Change Service.

August Precipitation in Mattawa

In Mattawa in August, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

August Precipitation Trends in Mattawa

The chart displays monthly precipitation patterns in Mattawa, 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 Mattawa, August typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Mattawa

In Mattawa in August humidity is 63%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, creating a thick atmosphere that can make outdoor activities a little sluggish, but the warmth invites leisurely strolls and relaxation in shaded spots.

August Average Humidity in Mattawa

This chart illustrates the average monthly humidity levels in Mattawa, 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 Mattawa is approximately 63%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Mattawa

In Mattawa 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 Mattawa.

Maximum UV Index Levels in Mattawa for August

The chart shows the monthly maximum UV Index (UVI) for Mattawa 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 Mattawa typically reaches 9, which falls under the very high exposure category.

Data source: Mattawa 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 Mattawa Compares to Other Months

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

This table compares monthly weather conditions in Mattawa, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	45 mm (1.8 inches)	86%	low
February Weather	0°C (33°F)	43 mm (1.7 inches)	86%	moderate
March Weather	6°C (43°F)	27 mm (1.1 inches)	87%	moderate
April Weather	11°C (52°F)	26 mm (1.0 inches)	84%	high
May Weather	17°C (63°F)	17 mm (0.7 inches)	81%	very high
June Weather	21°C (70°F)	7 mm (0.3 inches)	82%	very high
July Weather	25°C (77°F)	1 mm (0.0 inches)	79%	very high
August Weather	25°C (77°F)	5 mm (0.2 inches)	63%	very high
September Weather	19°C (66°F)	14 mm (0.5 inches)	62%	high
October Weather	11°C (51°F)	33 mm (1.3 inches)	83%	moderate
November Weather	4°C (40°F)	35 mm (1.4 inches)	89%	moderate
December Weather	0°C (33°F)	38 mm (1.5 inches)	88%	low