July Weather in Grass Valley, United States

Last updated: June 24, 2025

In Grass Valley, United States, the average temperature in July hovers around 26°C (79°F), with fluctuations between a chilly 11°C (53°F) and a scorching 41°C (105°F). Expect very little rain, with a mere 1 mm (0.0 in) of precipitation over 0 days, contributing to an average humidity level of just 44%. Ideal weather for outdoor adventures!

July Temperature in Grass Valley

In July in Grass Valley, the average temperature is 26°C (79°F). Maximum temperatures can reach 41°C (105°F), and minimums can drop as low as 11°C (53°F). Pack accordingly for a range of temperatures while enjoying your travel experience!

July Weather in Grass Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Grass Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grass Valley, July typically has an average temperature of 26°C (79°F), with highs reaching up to 41°C (105°F) and lows dropping to around 11°C (53°F).

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

July Precipitation in Grass Valley

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

July Precipitation Trends in Grass Valley

The chart displays monthly precipitation patterns in Grass Valley, 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 Grass Valley, 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 Grass Valley

In Grass Valley in July, humidity is 44%. With an average temperature of 26°C (79°F), this humidity feels like a warm embrace—pleasant for strolling outdoors, yet with just enough moisture in the air to keep travelers refreshed during their adventures.

July Average Humidity in Grass Valley

This chart illustrates the average monthly humidity levels in Grass Valley, 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 Grass Valley is approximately 44%, 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 Grass Valley

In Grass Valley in July, 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 Grass Valley.

Maximum UV Index Levels in Grass Valley for July

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

Data source: Grass Valley 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 Grass Valley Compares to Other Months

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

This table compares monthly weather conditions in Grass Valley, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	269 mm (10.6 inches)	84%	moderate
February Weather	8°C (46°F)	279 mm (11.0 inches)	84%	moderate
March Weather	9°C (48°F)	267 mm (10.5 inches)	83%	high
April Weather	13°C (55°F)	129 mm (5.1 inches)	81%	very high
May Weather	17°C (62°F)	76 mm (3.0 inches)	74%	very high
June Weather	22°C (72°F)	13 mm (0.5 inches)	64%	extreme
July Weather	26°C (79°F)	1 mm (0.0 inches)	44%	extreme
August Weather	25°C (77°F)	2 mm (0.1 inches)	36%	very high
September Weather	21°C (70°F)	23 mm (0.9 inches)	44%	very high
October Weather	15°C (60°F)	78 mm (3.1 inches)	65%	high
November Weather	10°C (51°F)	157 mm (6.2 inches)	84%	moderate
December Weather	7°C (44°F)	215 mm (8.4 inches)	83%	moderate