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
With the arrival of April, the average high-temperature transitions from a cold 42.3°F (5.7°C) in March to a fresh 53.2°F (11.8°C). Keller documents a significant temperature variance in April, with the mean nighttime lows settling at a subzero cold 31.5°F (-0.3°C).Humidity
The average relative humidity in April is 71%.Rainfall
In April, the rain falls for 9.9 days. Throughout April, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 86.6 rainfall days, and 6.38" (162mm) of precipitation is accumulated.Snowfall
January through April, September, November and December are months with snowfall. April is the last month it regularly snows. During 0.5 snowfall days, in April, Keller aggregates 0.04" (1mm) of snow. In Keller, during the entire year, snow falls for 24.6 days and aggregates up to 6.34" (161mm) of snow.Daylight
The average length of the day in April is 13h and 42min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:25 pm. On the last day of April, sunrise is at 5:36 am and sunset at 8:07 pm PDT.
Sunshine
In Keller, the average sunshine in April is 9.6h.UV index
In Keller, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A daily high UV index of 3 in April leads to these guidelines:
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. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Keller in April?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
When are sunrise and sunset in April in Keller?
How long on average sun shines in April in Keller?
What is the UV index intensity in April?
Average temperature in April
Keller, WA
- Average high temperature in April: 53.2°F
The warmest month (with the highest average high temperature) is August (82.8°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in April: 31.5°F
The month with the highest average low temperature is August (52.3°F).
The coldest months (with the lowest average low temperature) are February and December (18.3°F).
Average pressure in April
Keller, WA
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in April
Keller, WA
- Average wind speed in April: 4.6mph
The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest months (with the lowest average wind speed) are January and December (3.4mph).
Average humidity in April
Keller, WA
- Average humidity in April: 71%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in April
Keller, WA
- Average rainfall in April: 0.43"
The wettest month (with the highest rainfall) is May (1.06").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in April
Keller, WA
- Average rainfall days in April: 9.9 days
The month with the highest number of rainy days is May (11.3 days).
The months with the least rainy days are February and September (5 days).
Average snowfall in April
Keller, WA
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in April
Keller, WA
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is December (7.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Keller, WA
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in April: 9h and 4min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Keller, WA
- Average sunshine days in April: 18.4 days
The month with the most sunshine days is September (23.8 days).
The month with the least sunshine days is June (17.3 days).
Average UV index in April
Keller, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in April
Keller, WA
- Average cloud cover in April: 40
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in April
Keller, WA
- Average visibility in April: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (2mi).
Keller, Washington, USA
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