April weather forecastFort Thompson, SD
April
Weather in April
April in Fort Thompson, South Dakota, is a moderate spring month, with an average temperature fluctuating between 56.3°F (13.5°C) and 38.3°F (3.5°C).Temperature
The onset of April brings a temperature shift, with the average high-temperature moving from a chilly 45°F (7.2°C) in March to a mild 56.3°F (13.5°C). Throughout the nights in April, an average low-temperature of 38.3°F (3.5°C) is noted.Humidity
The average relative humidity in April is 66%.Rainfall
In Fort Thompson, in April, it is raining for 13.7 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 107.6 rainfall days, and 17.83" (453mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 3.4 snowfall days, in April, Fort Thompson aggregates 1.89" (48mm) of snow. In Fort Thompson, South Dakota, during the entire year, snow falls for 50.9 days and aggregates up to 17.87" (454mm) of snow.Daylight
In Fort Thompson, the average length of the day in April is 13h and 29min.On the first day of the month, sunrise is at 7:17 am and sunset at 8:05 pm. On the last day of April, sunrise is at 6:29 am and sunset at 8:40 pm CDT.
Sunshine
In Fort Thompson, the average sunshine in April is 7.9h.UV index
In Fort Thompson, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during April translates into the following guidance:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. 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
Average temperature in April
Fort Thompson, SD
- Average high temperature in April: 56.3°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in April: 38.3°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in April
Fort Thompson, 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 (29.84"Hg).
Average wind speed in April
Fort Thompson, SD
- Average wind speed in April: 11.3mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in April
Fort Thompson, SD
- Average humidity in April: 66%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).
Average rainfall in April
Fort Thompson, SD
- Average rainfall in April: 1.89"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").
Average rainfall days in April
Fort Thompson, SD
- Average rainfall days in April: 13.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in April
Fort Thompson, SD
- Average snowfall in April: 1.89"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Fort Thompson, SD
- Average snowfall days in April: 3.4 days
The months with the highest number of snowfall days are January and February (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Fort Thompson, SD
- Average daylight in April: 13h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in April: 7h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in April
Fort Thompson, SD
- Average sunshine days in April: 11.8 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in April
Fort Thompson, SD
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in April
Fort Thompson, SD
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in April
Fort Thompson, 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).
