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 arrival coincides with a rise in the average high-temperature, moving from March's cool 51.4°F (10.8°C) to a comfortable 61.3°F (16.3°C). The average nighttime temperature in Mattawa lowers to a cold 41.5°F (5.3°C) throughout April.Humidity
The average relative humidity in April in Mattawa is 52%.Rainfall
In Mattawa, in April, it is raining for 8.8 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, in Mattawa, there are 86.4 rainfall days, and 6.38" (162mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, September, November and December. April is the last month it regularly snows. During 0.4 snowfall days, in April, Mattawa aggregates 0.08" (2mm) of snow. In Mattawa, during the entire year, snow falls for 22.3 days and aggregates up to 10" (254mm) of snow.Daylight
In Mattawa, the average length of the day in April is 13h and 38min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:29 pm. On the last day of April, in Mattawa, sunrise is at 5:44 am and sunset at 8:08 pm PDT.
Sunshine
The average sunshine in April in Mattawa, Washington, is 10.3h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 4 in April, converts into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What is the average April temperature in Mattawa?
What is the average humidity in April in Mattawa?
How many days does it rain in April in Mattawa?
What is the last month it snows in Mattawa?
How many hours of daylight does Mattawa have in April?
When is the sunrise / sunset in April in Mattawa?
How long on average sun shines in April in Mattawa?
How high is the UV index in April in Mattawa?
Average temperature in April
Mattawa, WA
- Average high temperature in April: 61.3°F
The warmest months (with the highest average high temperature) are July and August (88.3°F).
The month with the lowest average high temperature is December (34.5°F).
- Average low temperature in April: 41.5°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is December (24.3°F).
Average pressure in April
Mattawa, WA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in April
Mattawa, WA
- Average wind speed in April: 7.6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity in April
Mattawa, WA
- Average humidity in April: 52%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (37%).
Average rainfall in April
Mattawa, WA
- Average rainfall in April: 0.39"
The wettest months (with the highest rainfall) are January and December (0.87").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in April
Mattawa, WA
- Average rainfall days in April: 8.8 days
The month with the highest number of rainy days is March (10.6 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in April
Mattawa, WA
- Average snowfall in April: 0.08"
The month with the highest snowfall is December (3.43").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in April
Mattawa, WA
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is December (6.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Mattawa, WA
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in April: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in April
Mattawa, WA
- Average sunshine days in April: 19 days
The months with the most sunshine days are July and August (25.8 days).
The month with the least sunshine days is February (16 days).
Average UV index in April
Mattawa, 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
Mattawa, WA
- Average cloud cover in April: 32
The month with the most cloud cover is January (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in April
Mattawa, WA
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Mattawa, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
