April weather forecastMount Wilson, CA
April
Weather in April
April in Mount Wilson, California, is a pleasant spring month, with an average temperature ranging between max 68.9°F (20.5°C) and min 47.8°F (8.8°C).Temperature
The arrival of April marks a slight shift to an average high-temperature of an agreeable 68.9°F (20.5°C) from March's 64.6°F (18.1°C). Throughout April, Mount Wilson anticipates an average low-temperature of 47.8°F (8.8°C).Humidity
In April, the average relative humidity is 54%.Rainfall
In Mount Wilson, during April, the rain falls for 5.2 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 50.3 rainfall days, and 8.7" (221mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Mount Wilson. April is the last month it regularly snows. During 0.4 snowfall days, in April, Mount Wilson aggregates 1.18" (30mm) of snow. Throughout the year, there are 3.5 snowfall days, and 7.32" (186mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 4min.On the first day of April, sunrise is at 6:38 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 7:36 pm PDT.
Sunshine
The average sunshine in April is 11.4h.UV index
The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 5 in April translates into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Mount Wilson, CA
- Average high temperature in April: 68.9°F
The warmest month (with the highest average high temperature) is August (86.2°F).
The month with the lowest average high temperature is December (58.5°F).
- Average low temperature in April: 47.8°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (43.3°F).
Average pressure in April
Mount Wilson, CA
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in April
Mount Wilson, CA
- Average wind speed in April: 6mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in April
Mount Wilson, CA
- Average humidity in April: 54%
The month with the highest relative humidity is March (56%).
The month with the lowest relative humidity is August (45%).
Average rainfall in April
Mount Wilson, CA
- Average rainfall in April: 0.63"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in April
Mount Wilson, CA
- Average rainfall days in April: 5.2 days
The month with the highest number of rainy days is March (6.4 days).
The month with the least rainy days is June (1.3 days).
Average snowfall in April
Mount Wilson, CA
- Average snowfall in April: 1.18"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Mount Wilson, CA
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Mount Wilson, CA
- Average daylight in April: 13h and 6min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in April: 11h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in April
Mount Wilson, CA
- Average sunshine days in April: 24.3 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.4 days).
Average UV index in April
Mount Wilson, CA
- Average UV index in April: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in April
Mount Wilson, CA
- Average cloud cover in April: 16
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in April
Mount Wilson, 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).
