August Weather in Vacaville, United States

Last updated: June 24, 2025

In August, the average temperature in Vacaville, United States is a pleasant 22°C (72°F). Expect a range from a refreshing 11°C (53°F) to a sweltering 43°C (109°F). With 0 mm (0.0 in) of precipitation over the month, you'll enjoy clear skies on all 0 days, complemented by an average humidity of just 36%. Perfect weather for outdoor adventures!

August Temperature in Vacaville

In August in Vacaville, the average temperature is 22°C (72°F). The maximum can reach 43°C (109°F) and the minimum can be as low as 11°C (53°F). This makes Vacaville a great destination for travelers seeking warm weather, but it's advisable to be prepared for both heat and cooler evenings.

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

The chart illustrates August temperature patterns in Vacaville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vacaville, August typically has an average temperature of 22°C (72°F), with highs reaching up to 43°C (109°F) and lows dropping to around 11°C (53°F).

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

August Precipitation in Vacaville

In Vacaville in August, the precipitation amount is 0 mm (0.0 in) during 0 days.

August Precipitation Trends in Vacaville

The chart displays monthly precipitation patterns in Vacaville, 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 Vacaville, August typically receives around 0 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 Vacaville

In Vacaville in August, humidity is 36%. With an average temperature of 22°C (72°F), this humidity feels like a comfortable and pleasant environment for traveling, making outdoor activities enjoyable without feeling overly sticky or oppressive.

August Average Humidity in Vacaville

This chart illustrates the average monthly humidity levels in Vacaville, 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 Vacaville is approximately 36%, 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 Vacaville

In Vacaville in August, 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 Vacaville.

Maximum UV Index Levels in Vacaville for August

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

Data source: Vacaville 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 Vacaville Compares to Other Months

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

This table compares monthly weather conditions in Vacaville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	119 mm (4.7 inches)	84%	moderate
February Weather	12°C (53°F)	102 mm (4.0 inches)	84%	moderate
March Weather	13°C (56°F)	77 mm (3.0 inches)	83%	high
April Weather	16°C (61°F)	32 mm (1.3 inches)	81%	very high
May Weather	19°C (66°F)	17 mm (0.7 inches)	74%	very high
June Weather	22°C (71°F)	1 mm (0.1 inches)	64%	extreme
July Weather	22°C (71°F)	0 mm (0.0 inches)	44%	extreme
August Weather	22°C (72°F)	0 mm (0.0 inches)	36%	very high
September Weather	21°C (71°F)	1 mm (0.0 inches)	44%	very high
October Weather	18°C (65°F)	26 mm (1.0 inches)	65%	high
November Weather	13°C (56°F)	38 mm (1.5 inches)	84%	moderate
December Weather	10°C (50°F)	85 mm (3.3 inches)	83%	moderate