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 onset of April, Alpena's weather sees a temperature rise, transitioning from a cold 42.3°F (5.7°C) in March to a mild 55.9°F (13.3°C). In April, the average low-temperature records at a wintry 37.9°F (3.3°C) during the nights.Humidity
The average relative humidity in April in Alpena is 67%.Rainfall
In Alpena, South Dakota, in April, during 11.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 101.8 rainfall days, and 18.19" (462mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows in Alpena. During 3 snowfall days, in April, Alpena aggregates 2.68" (68mm) of snow. In Alpena, during the entire year, snow falls for 42.3 days and aggregates up to 16.54" (420mm) of snow.Daylight
In April, the average length of the day in Alpena is 13h and 29min.On the first day of the month, sunrise is at 7:13 am and sunset at 8:01 pm. On the last day of April, in Alpena, sunrise is at 6:24 am and sunset at 8:36 pm CDT.
Sunshine
The average sunshine in April is 7.9h.UV index
In Alpena, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In April, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What are April temperatures in Alpena?
What is the average humidity in April in Alpena?
How many days does it rain in April in Alpena?
What is the last month it snows in Alpena?
How many hours of daylight does Alpena have in April?
When is the sunrise / sunset in April in Alpena?
How many hours of sunshine does Alpena have in April?
What is the UV index intensity in April in Alpena?
Average temperature in April
Alpena, SD
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in April: 37.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).
Average pressure in April
Alpena, SD
- Average pressure in April: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in April
Alpena, SD
- Average wind speed in April: 11.1mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).
Average humidity in April
Alpena, SD
- Average humidity in April: 67%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (62%).
Average rainfall in April
Alpena, SD
- Average rainfall in April: 1.77"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in April
Alpena, SD
- Average rainfall days in April: 11.3 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in April
Alpena, SD
- Average snowfall in April: 2.68"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Alpena, SD
- Average snowfall days in April: 3 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Alpena, SD
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Alpena, SD
- Average sunshine days in April: 14.8 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in April
Alpena, SD
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in April
Alpena, SD
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in April
Alpena, SD
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Alpena, South Dakota, USA
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