April weather forecastSullivan, IN
April
Weather in April
April is a comfortable spring month in Sullivan, Indiana, with an average temperature fluctuating between 63.7°F (17.6°C) and 46.9°F (8.3°C).Temperature
With the onset of April, Sullivan sees a temperature rise, with the average high-temperature moving from March's fresh 52.3°F (11.3°C) to an enjoyable 63.7°F (17.6°C). Nightly temperatures drop to an average low of 46.9°F (8.3°C) in April.Humidity
The average relative humidity in April is 77%.Rainfall
The month with the most rainfall is April, when the rain falls for 16 days and typically aggregates up to 4.06" (103mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.4 snowfall days, in April, Sullivan aggregates 0.16" (4mm) of snow. Throughout the year, there are 23.8 snowfall days, and 6.89" (175mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 16min.On the first day of April, sunrise is at 7:32 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 8:42 pm EDT.
Sunshine
In April, the average sunshine is 7.1h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 4 in April transforms into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sullivan, IN
- Average high temperature in April: 63.7°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in April: 46.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in April
Sullivan, IN
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Sullivan, IN
- Average wind speed in April: 9.6mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in April
Sullivan, IN
- Average humidity in April: 77%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Sullivan, IN
- Average rainfall in April: 4.06"
The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in April
Sullivan, IN
- Average rainfall days in April: 16 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in April
Sullivan, IN
- Average snowfall in April: 0.16"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Sullivan, IN
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Sullivan, IN
- Average daylight in April: 13h and 18min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in April: 7h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in April
Sullivan, IN
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in April
Sullivan, IN
- Average UV index in April: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Sullivan, IN
- Average cloud cover in April: 44
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Sullivan, IN
- 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).
