Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May introduces a marginal temperature uplift, with average high-temperatures adjusting from April's enjoyable 63.1°F (17.3°C) to an agreeable 71.2°F (21.8°C). In May, a remarkable difference from daytime highs is noted, as Grass Valley records an average temperature of 48.4°F (9.1°C) during the night.Humidity
In Grass Valley, the average relative humidity in May is 60%.Rainfall
In Grass Valley, in May, during 6.5 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, in Grass Valley, there are 82 rainfall days, and 33.11" (841mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows in Grass Valley. During 0.1 snowfall days, in May, Grass Valley aggregates 0.08" (2mm) of snow. Throughout the year, in Grass Valley, there are 6.8 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
In Grass Valley, the average length of the day in May is 14h and 20min.On the first day of the month, sunrise is at 6:04 am and sunset at 7:57 pm. On the last day of May, in Grass Valley, sunrise is at 5:39 am and sunset at 8:24 pm PDT.
Sunshine
In May, the average sunshine in Grass Valley is 10.8h.UV index
The average daily maximum UV index in May in Grass Valley is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 5 during May translates into the following guidance:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Grass Valley in May?
What is the average humidity in May in Grass Valley?
How much does it rain in Grass Valley in May?
What is the last month it snows in Grass Valley?
How many hours of daylight does Grass Valley have in May?
When are sunrise and sunset in May in Grass Valley?
How many hours of sunshine does Grass Valley have in May?
What is the UV index intensity in May in Grass Valley?
Average temperature in May
Grass Valley, CA
- Average high temperature in May: 71.2°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 May: 48.4°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 May
Grass Valley, CA
- Average pressure in May: 29.95"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 May
Grass Valley, CA
- Average wind speed in May: 5.5mph
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 May
Grass Valley, CA
- Average humidity in May: 60%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall in May
Grass Valley, CA
- Average rainfall in May: 1.73"
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 May
Grass Valley, CA
- Average rainfall days in May: 6.5 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 May
Grass Valley, CA
- Average snowfall in May: 0.08"
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 May
Grass Valley, CA
- Average snowfall days in May: 0.1 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 May /
Average sunshine in May
Grass Valley, CA
- Average daylight in May: 14h and 2min
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 May: 10h and 5min
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 May
Grass Valley, CA
- Average sunshine days in May: 23.3 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 May
Grass Valley, CA
- Average UV index in May: 5
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 May
Grass Valley, CA
- Average cloud cover in May: 22
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 May
Grass Valley, CA
- Average visibility in May: 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).
Grass Valley, California, USA
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