August Weather in Joint Base Lewis McChord, United States

Last updated: June 24, 2025

In August, the average temperature in Joint Base Lewis McChord, United States hovers around 18°C (66°F). Expect a range where the minimum dips to 9°C (48°F) and the maximum soars to 34°C (93°F). During this month, anticipate approximately 13 mm (0.5 in) of precipitation over 3 days, paired with a comforting average humidity of 73%. Enjoy exploring this vibrant locale!

August Temperature in Joint Base Lewis McChord

In August in Joint Base Lewis McChord, the average temperature is 18°C (66°F), with maximums reaching 34°C (93°F) and minimums dipping as low as 9°C (48°F). This mild climate makes it an ideal time for outdoor activities and exploring the local sights.

August Weather in Joint Base Lewis McChord: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Joint Base Lewis McChord, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joint Base Lewis McChord, August typically has an average temperature of 18°C (66°F), with highs reaching up to 34°C (93°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for Joint Base Lewis McChord generated using information from the Copernicus Climate Change Service.

August Precipitation in Joint Base Lewis McChord

In Joint Base Lewis McChord in August, the precipitation amount is 13 mm (0.5 in) over a span of 3 days.

August Precipitation Trends in Joint Base Lewis McChord

The chart displays monthly precipitation patterns in Joint Base Lewis McChord, 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 Joint Base Lewis McChord, August typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 3 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 Joint Base Lewis McChord

In Joint Base Lewis McChord in August, humidity is 73%. With an average temperature of 18°C (66°F), this humidity feels like a warm and sticky embrace, making travel somewhat uncomfortable as the air feels heavy, and you may find yourself longing for a refreshing breeze.

August Average Humidity in Joint Base Lewis McChord

This chart illustrates the average monthly humidity levels in Joint Base Lewis McChord, 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 Joint Base Lewis McChord is approximately 73%, 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 Joint Base Lewis McChord

In Joint Base Lewis McChord in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Joint Base Lewis McChord.

Maximum UV Index Levels in Joint Base Lewis McChord for August

The chart shows the monthly maximum UV Index (UVI) for Joint Base Lewis McChord 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 Joint Base Lewis McChord typically reaches 8, which falls under the very high exposure category.

Data source: Joint Base Lewis McChord 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 Joint Base Lewis McChord Compares to Other Months

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

This table compares monthly weather conditions in Joint Base Lewis McChord, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	183 mm (7.2 inches)	86%	low
February Weather	4°C (40°F)	189 mm (7.4 inches)	84%	moderate
March Weather	7°C (44°F)	136 mm (5.4 inches)	85%	moderate
April Weather	9°C (49°F)	118 mm (4.7 inches)	83%	high
May Weather	13°C (55°F)	68 mm (2.7 inches)	84%	very high
June Weather	16°C (60°F)	58 mm (2.3 inches)	84%	very high
July Weather	18°C (65°F)	11 mm (0.4 inches)	82%	very high
August Weather	18°C (66°F)	13 mm (0.5 inches)	73%	very high
September Weather	16°C (60°F)	90 mm (3.5 inches)	74%	high
October Weather	10°C (51°F)	142 mm (5.6 inches)	83%	moderate
November Weather	7°C (45°F)	180 mm (7.1 inches)	86%	moderate
December Weather	5°C (41°F)	201 mm (7.9 inches)	87%	low