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
As Richland transitions into April, a marginal rise in the average high-temperature is observed, moving from a cool 54.7°F (12.6°C) in March to a refreshing 63.3°F (17.4°C). An average nighttime temperature of 43.2°F (6.2°C) is observed during April.Humidity
In April, the average relative humidity is 53%.Rainfall
In Richland, in April, it is raining for 9.9 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, there are 100.2 rainfall days, and 7.05" (179mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In April, the average length of the day is 13h and 36min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:26 pm. On the last day of April, sunrise is at 5:43 am and sunset at 8:05 pm PDT.
Sunshine
In Richland, the average sunshine in April is 10.2h.UV index
The average daily maximum UV index in April in Richland is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 4 during April translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
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 in Richland?
How much does it rain in April?
When it does not snow?
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?
What is the UV index reading in April?
Average temperature in April
Richland, WA
- Average high temperature in April: 63.3°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 (38.1°F).
- Average low temperature in April: 43.2°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).
Average pressure in April
Richland, WA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in April
Richland, WA
- Average wind speed in April: 8.3mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).
Average humidity in April
Richland, WA
- Average humidity in April: 53%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (35%).
Average rainfall in April
Richland, WA
- Average rainfall in April: 0.51"
The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and September (0.2").
Average rainfall days in April
Richland, WA
- Average rainfall days in April: 9.9 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in April
Richland, WA
- Average snowfall in April: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Richland, WA
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is December (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Richland, WA
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in April: 10h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in April
Richland, WA
- Average sunshine days in April: 17 days
The month with the most sunshine days is July (25.7 days).
The months with the least sunshine days are February and March (15.3 days).
Average UV index in April
Richland, WA
- Average UV index in April: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Richland, WA
- Average cloud cover in April: 32
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in April
Richland, WA
- 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).
Richland, Washington, USA
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