July Weather in Chehalis, United States

Last updated: June 24, 2025

In July, the average temperature in Chehalis, United States is a pleasant 18°C (65°F), with daytime highs soaring to a maximum of 35°C (95°F) and nighttime lows dipping to around 8°C (47°F). Expect 12 mm (0.5 in) of precipitation spread across 3 days, while the average humidity hovers around a comfortable 82%. Ideal weather for exploration!

July Temperature in Chehalis

In July in Chehalis, the average temperature is 18°C (65°F). Maximum temperatures can reach 35°C (95°F), while minimums can dip as low as 8°C (47°F). It's important to pack for varying weather conditions when traveling during this month.

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

The chart illustrates July temperature patterns in Chehalis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chehalis, July typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (95°F) and lows dropping to around 8°C (47°F).

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

July Precipitation in Chehalis

In Chehalis in July, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.

July Precipitation Trends in Chehalis

The chart displays monthly precipitation patterns in Chehalis, 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 Chehalis, July typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 3 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 Chehalis

In Chehalis in July, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

July Average Humidity in Chehalis

This chart illustrates the average monthly humidity levels in Chehalis, 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 Chehalis is approximately 82%, 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 Chehalis

In Chehalis in July, 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 Chehalis.

Maximum UV Index Levels in Chehalis for July

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

Data source: Chehalis 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 Chehalis Compares to Other Months

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

This table compares monthly weather conditions in Chehalis, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	186 mm (7.3 inches)	86%	low
February Weather	4°C (40°F)	169 mm (6.7 inches)	84%	moderate
March Weather	7°C (45°F)	137 mm (5.4 inches)	85%	moderate
April Weather	10°C (49°F)	119 mm (4.7 inches)	83%	high
May Weather	13°C (56°F)	71 mm (2.8 inches)	84%	very high
June Weather	16°C (60°F)	54 mm (2.1 inches)	84%	very high
July Weather	18°C (65°F)	12 mm (0.5 inches)	82%	very high
August Weather	19°C (66°F)	15 mm (0.6 inches)	73%	very high
September Weather	16°C (61°F)	88 mm (3.5 inches)	74%	high
October Weather	10°C (51°F)	132 mm (5.2 inches)	83%	moderate
November Weather	7°C (45°F)	181 mm (7.1 inches)	86%	moderate
December Weather	5°C (40°F)	198 mm (7.8 inches)	87%	low