July Weather in Mattawa, United States

Last updated: June 24, 2025

In Mattawa, United States, the average temperature in July hovers around 25°C (77°F), with minimums dipping to 11°C (53°F) and occasional peaks reaching up to 43°C (109°F). Rainfall is minimal, with an average precipitation of just 1 mm (0.0 in) over a span of 0 days. The atmosphere feels quite humid, boasting an average humidity of 79%.

July Temperature in Mattawa

In July in Mattawa, the average temperature is 25°C (77°F). The maximum can reach 43°C (109°F), and the minimum can be as low as 11°C (53°F). Travelers should be prepared for warm days and cooler evenings during this time.

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

The chart illustrates July 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, July typically has an average temperature of 25°C (77°F), with highs reaching up to 43°C (109°F) and lows dropping to around 11°C (53°F).

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

July Precipitation in Mattawa

In Mattawa in July, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

July Precipitation Trends in Mattawa

The chart displays monthly precipitation patterns in Mattawa, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Mattawa, July typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Mattawa

In Mattawa in July, humidity is 79%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sluggish but pleasantly tropical.

July Average Humidity in Mattawa

This chart illustrates the average monthly humidity levels in Mattawa, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Mattawa is approximately 79%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Mattawa

In Mattawa in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Mattawa.

Maximum UV Index Levels in Mattawa for July

The chart shows the monthly maximum UV Index (UVI) for Mattawa in July, 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 July, the maximum UV index in Mattawa typically reaches 10, which falls under the very high exposure category.

Data source: Mattawa July 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 July 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 July’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 July’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