April weather forecastGrass Valley, CA
April
Weather in April
April is a refreshing spring month in Grass Valley, California, with an average temperature ranging between min 43.3°F (6.3°C) and max 63.1°F (17.3°C).Temperature
Grass Valley's April weather indicates a minor increase in high-temperatures, edging from March's moderate 56.5°F (13.6°C) to a comfortable 63.1°F (17.3°C). In Grass Valley, the average low-temperature during the month of April is a chilly 43.3°F (6.3°C).Humidity
In Grass Valley, the average relative humidity in April is 68%.Rainfall
In April, the rain falls for 10.3 days. Throughout April, 2.28" (58mm) of precipitation is accumulated. In Grass Valley, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Grass Valley, during April, snow falls for 0.3 days and regularly aggregates up to 0.24" (6mm) of snow. Throughout the year, there are 6.8 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
In April, the average length of the day in Grass Valley is 13h and 16min.On the first day of April in Grass Valley, sunrise is at 6:47 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:56 pm PDT.
Sunshine
The average sunshine in April in Grass Valley is 9.9h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in April translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Grass Valley, CA
- Average high temperature in April: 63.1°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 April: 43.3°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 April
Grass Valley, CA
- Average pressure in April: 30.01"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 April
Grass Valley, CA
- Average wind speed in April: 5.7mph
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 April
Grass Valley, CA
- Average humidity in April: 68%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall in April
Grass Valley, CA
- Average rainfall in April: 2.28"
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 April
Grass Valley, CA
- Average rainfall days in April: 10.3 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 April
Grass Valley, CA
- Average snowfall in April: 0.24"
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 April
Grass Valley, CA
- Average snowfall days in April: 0.3 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 April /
Average sunshine in April
Grass Valley, CA
- Average daylight in April: 13h and 18min
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 April: 9h and 54min
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 April
Grass Valley, CA
- Average sunshine days in April: 18.8 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 April
Grass Valley, CA
- Average UV index in April: 4
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 April
Grass Valley, CA
- Average cloud cover in April: 31
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 April
Grass Valley, CA
- Average visibility in April: 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).
