Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
In Riverdale, stepping into April brings a gentle temperature nudge, moving slightly up from March's comfortable 67.8°F (19.9°C) to a moderately hot 74.8°F (23.8°C). Riverdale documents a significant temperature variance in April, with the mean nighttime lows settling at a cool 51.4°F (10.8°C).Humidity
In Riverdale, the average relative humidity in April is 53%.Rainfall
In Riverdale, in April, during 7 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Riverdale, during the entire year, the rain falls for 58.2 days and collects up to 9.29" (236mm) of precipitation.Daylight
The average length of the day in April is 13h and 9min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:22 pm. On the last day of April, sunrise is at 6:06 am and sunset at 7:47 pm PDT.
Sunshine
The average sunshine in April is 10.9h.UV index
In Riverdale, California, the average daily maximum UV index in April is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 6 in April suggests the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the average humidity in April?
How much does it rain in April?
How many hours of daylight does Riverdale have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Riverdale have in April?
What is the UV index reading in April?
Average temperature in April
Riverdale, CA
- Average high temperature in April: 74.8°F
The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in April: 51.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).
Average pressure in April
Riverdale, CA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Riverdale, CA
- Average wind speed in April: 6.5mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).
Average humidity in April
Riverdale, CA
- Average humidity in April: 53%
The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).
Average rainfall in April
Riverdale, CA
- Average rainfall in April: 0.94"
The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").
Average rainfall days in April
Riverdale, CA
- Average rainfall days in April: 7 days
The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in April /
Average sunshine in April
Riverdale, CA
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in April: 10h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in April
Riverdale, CA
- Average sunshine days in April: 22.5 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).
Average UV index in April
Riverdale, CA
- Average UV index in April: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in April
Riverdale, CA
- Average cloud cover in April: 21
The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in April
Riverdale, 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).
Riverdale, California, USA
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