July weather forecastGrass Valley, CA
July
Weather in July
July is a hot summer month in Grass Valley, California, with an average temperature varying between 60.1°F (15.6°C) and 90.1°F (32.3°C).Temperature
July is the warmest month of the year, registering average temperatures as high as 90.1°F (32.3°C) and as low as 60.1°F (15.6°C).Humidity
July is the least humid month, with an average relative humidity of 37%.Rainfall
July and August are months with the least rain when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.Snowfall
In Grass Valley, snow does not fall in June through October.Daylight
In Grass Valley, the average length of the day in July is 14h and 36min.On the first day of the month, sunrise is at 5:42 am and sunset at 8:34 pm. On the last day of July, in Grass Valley, sunrise is at 6:04 am and sunset at 8:16 pm PDT.
Sunshine
The month with the most sunshine is July, with an average of 12.2h of sunshine.UV index
With an average maximum UV index of 7, July is the month with the highest UV index in Grass Valley, California. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In July, the maximum UV index of 7 transforms into these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Grass Valley, CA
- Average high temperature in July: 90.1°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in July: 60.1°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in July
Grass Valley, CA
- Average pressure in July: 29.91"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in July
Grass Valley, CA
- Average wind speed in July: 5mph
The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in July
Grass Valley, CA
- Average humidity in July: 37%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall in July
Grass Valley, CA
- Average rainfall in July: 0.04"
The wettest month (with the highest rainfall) is March (6.57").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in July
Grass Valley, CA
- Average rainfall days in July: 1.1 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (1.1 days).
Average snowfall in July
Grass Valley, CA
- Average snowfall in July: 0"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in July
Grass Valley, CA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is March (2.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Grass Valley, CA
- Average daylight in July: 14h and 36min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in July: 12h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in July
Grass Valley, CA
- Average sunshine days in July: 29.8 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).
Average UV index in July
Grass Valley, CA
- Average UV index in July: 7
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in July
Grass Valley, CA
- Average cloud cover in July: 4
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in July
Grass Valley, CA
- Average visibility in July: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
