April weather forecastCasper, WY
April
Weather in April
Casper, Wyoming experiences a brisk spring throughout April, characterised by a further climb in temperatures. Changing weather brings the touch of spring along with it, as snowfall effectively ends during this month with rainfall surpassing 1.22" (31mm). The city blossoms beautifully under the extended sunlight of 13.4 hours. With the average high temperature climbing above 50°F (10°C), the outdoor activities become increasingly pleasant. Thus, April paints Wyoming in a refreshing palette of spring season.Temperature
The shift from March to April in Casper is marked by a slight increase in the average high-temperature, moving from a frosty 43°F (6.1°C) to a cool 50.7°F (10.4°C). The average temperature in Casper, Wyoming, drops to a wintry 32°F (0°C) during the night in the month of April.Humidity
In April, the average relative humidity is 61%.Rainfall
In Casper, during April, the rain falls for 11.7 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 91.6 rainfall days, and 9.69" (246mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Casper. In Casper, in April, snow falls for 7.3 days, with typically accumulated 4.02" (102mm) of snow. In Casper, during the entire year, snow falls for 61.5 days and aggregates up to 32.13" (816mm) of snow.Daylight
In April, the average length of the day in Casper is 13h and 26min.On the first day of April, sunrise is at 6:45 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 8:05 pm MDT.
Sunshine
The average sunshine in April in Casper is 10h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In April, the maximum UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Casper, WY
- Average high temperature in April: 50.7°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in April: 32°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure in April
Casper, WY
- Average pressure in April: 29.9"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in April
Casper, WY
- Average wind speed in April: 10.9mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in April
Casper, WY
- Average humidity in April: 61%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (37%).
Average rainfall in April
Casper, WY
- Average rainfall in April: 1.22"
The wettest month (with the highest rainfall) is May (1.77").
The driest months (with the least rainfall) are January, August and September (0.43").
Average rainfall days in April
Casper, WY
- Average rainfall days in April: 11.7 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in April
Casper, WY
- Average snowfall in April: 4.02"
The month with the highest snowfall is November (5.47").
The months with the least snowfall are June, July and August (0").
Average snowfall days in April
Casper, WY
- Average snowfall days in April: 7.3 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Casper, WY
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in April: 10h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in April
Casper, WY
- Average sunshine days in April: 12.1 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in April
Casper, WY
- Average UV index in April: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in April
Casper, WY
- Average cloud cover in April: 33
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in April
Casper, WY
- 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).
