August Weather in Barstow, United States

Last updated: June 24, 2025

In August, the average temperature in Barstow, United States is a warm 31°C (88°F). While it may feel toasty, temperatures can dip to a refreshing 15°C (60°F) or soar up to a sweltering 43°C (110°F). Fortunately, you won’t have to worry about rain, as precipitation is a mere 1 mm (0.0 in) over 0 days. With an average humidity of just 28%, it’s the perfect time to enjoy the sunshine!

August Temperature in Barstow

In August in Barstow, the average temperature is 31°C (88°F), with maximums reaching 43°C (110°F) and minimums dropping to as low as 15°C (60°F). Travelers should be prepared for hot weather and ensure they have suitable clothing and hydration options.

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

The chart illustrates August temperature patterns in Barstow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barstow, August typically has an average temperature of 31°C (88°F), with highs reaching up to 43°C (110°F) and lows dropping to around 15°C (60°F).

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

August Precipitation in Barstow

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

August Precipitation Trends in Barstow

The chart displays monthly precipitation patterns in Barstow, 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 Barstow, August typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 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 Barstow

In Barstow in August, humidity is 28%. With an average temperature of 31°C (88°F), this humidity feels like a warm embrace, making traveling feel pleasantly tropical yet still comfortable, allowing for enjoyable outdoor exploration without overwhelming stickiness.

August Average Humidity in Barstow

This chart illustrates the average monthly humidity levels in Barstow, 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 Barstow is approximately 28%, 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 Barstow

In Barstow in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Barstow.

Maximum UV Index Levels in Barstow for August

The chart shows the monthly maximum UV Index (UVI) for Barstow 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 Barstow typically reaches 11, which falls under the extreme exposure category.

Data source: Barstow 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 Barstow Compares to Other Months

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

This table compares monthly weather conditions in Barstow, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	22 mm (0.9 inches)	76%	moderate
February Weather	11°C (51°F)	13 mm (0.5 inches)	80%	high
March Weather	14°C (57°F)	17 mm (0.7 inches)	69%	very high
April Weather	18°C (65°F)	11 mm (0.4 inches)	57%	very high
May Weather	22°C (71°F)	3 mm (0.1 inches)	45%	extreme
June Weather	28°C (83°F)	1 mm (0.0 inches)	34%	extreme
July Weather	31°C (89°F)	3 mm (0.1 inches)	29%	extreme
August Weather	31°C (88°F)	1 mm (0.0 inches)	28%	extreme
September Weather	27°C (80°F)	1 mm (0.0 inches)	41%	very high
October Weather	19°C (67°F)	2 mm (0.1 inches)	54%	very high
November Weather	14°C (57°F)	6 mm (0.2 inches)	68%	moderate
December Weather	8°C (47°F)	19 mm (0.7 inches)	75%	moderate