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 Jefferson transitions into April, the average high-temperature shows a change, moving from a frosty 46.6°F (8.1°C) in March to a refreshing 58.6°F (14.8°C). Jefferson experiences a consistent average temperature of 40.8°F (4.9°C) throughout the nights in April.Humidity
In April, the average relative humidity is 67%.Rainfall
In April, the rain falls for 13.3 days. Throughout April, 2.56" (65mm) of precipitation is accumulated. Throughout the year, in Jefferson, there are 122 rainfall days, and 21.61" (549mm) of precipitation is accumulated.Snowfall
Months with snowfall in Jefferson are January through May, October through December. In Jefferson, during April, snow falls for 2.1 days and regularly aggregates up to 1.61" (41mm) of snow. Throughout the year, in Jefferson, South Dakota, there are 38 snowfall days, and 13.23" (336mm) of snow is accumulated.Daylight
In April, the average length of the day in Jefferson is 13h and 25min.On the first day of April in Jefferson, South Dakota, sunrise is at 7:06 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:25 pm CDT.
Sunshine
The average sunshine in April is 8.1h.UV index
In Jefferson, the average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In April, a regular UV index of 4 translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What are April temperatures in Jefferson?
What is the average humidity in April in Jefferson?
How much does it rain in Jefferson in April?
How many days does it snow in April in Jefferson?
How many hours of daylight does Jefferson have in April?
When are sunrise and sunset in April in Jefferson?
How long on average sun shines in April in Jefferson?
How high is the UV index in April in Jefferson?
Average temperature in April
Jefferson, SD
- Average high temperature in April: 58.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in April: 40.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in April
Jefferson, SD
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in April
Jefferson, SD
- Average wind speed in April: 11.1mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in April
Jefferson, SD
- Average humidity in April: 67%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in April
Jefferson, SD
- Average rainfall in April: 2.56"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in April
Jefferson, SD
- Average rainfall days in April: 13.3 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in April
Jefferson, SD
- Average snowfall in April: 1.61"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Jefferson, SD
- Average snowfall days in April: 2.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Jefferson, SD
- Average daylight in April: 13h and 2min
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: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Jefferson, SD
- Average sunshine days in April: 13.6 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in April
Jefferson, SD
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Jefferson, SD
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in April
Jefferson, SD
- 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).
Jefferson, South Dakota, USA
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