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 snowfall in April
- Average snowfall 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
April's onset is marked by a subtle temperature increase, moving from a chilly 44.4°F (6.9°C) in March to a cool 53.2°F (11.8°C). Riverside's temperature in April lowers to a consistent average of 34°F (1.1°C) during the nights.Humidity
The average relative humidity in April is 59%.Rainfall
In Riverside, during April, the rain falls for 13.7 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 109.9 rainfall days, and 11.34" (288mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In April, in Riverside, it is snowing for 1.5 days. Throughout April, 0.35" (9mm) of snow is accumulated. Throughout the year, there are 46.8 snowfall days, and 25.75" (654mm) of snow is accumulated.Daylight
In Riverside, the average length of the day in April is 13h and 28min.On the first day of the month, sunrise is at 7:32 am and sunset at 8:19 pm. On the last day of April, sunrise is at 6:45 am and sunset at 8:54 pm MDT.
Sunshine
In Riverside, the average sunshine in April is 9.2h.UV index
In Riverside, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 3 during April translates into the following directions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How much does it rain in April?
How many days does it snow in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
How high is the UV index in April?
Average temperature in April
Riverside, OR
- Average high temperature in April: 53.2°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.8°F).
- Average low temperature in April: 34°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in April
Riverside, OR
- Average pressure in April: 30.01"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in April
Riverside, OR
- Average wind speed in April: 7.8mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity in April
Riverside, OR
- Average humidity in April: 59%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in April
Riverside, OR
- Average rainfall in April: 0.94"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in April
Riverside, OR
- Average rainfall days in April: 13.7 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall in April
Riverside, OR
- Average snowfall in April: 0.35"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Riverside, OR
- Average snowfall days in April: 1.5 days
The month with the highest number of snowfall days is December (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Riverside, OR
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 9h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in April
Riverside, OR
- Average sunshine days in April: 14.4 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in April
Riverside, OR
- Average UV index in April: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Riverside, OR
- Average cloud cover in April: 32
The months with the most cloud cover are January and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in April
Riverside, OR
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Riverside, Oregon, USA
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