April weather forecastSalem, IL
April
Weather in April
April is an enjoyable spring month in Salem, Illinois, with an average temperature varying between 47.3°F (8.5°C) and 64.4°F (18°C).Temperature
The shift from March to April sees an increase in the average high-temperature, transitioning from a fresh 53.2°F (11.8°C) to a comfortable 64.4°F (18°C). In the month of April, the temperature generally rests at an average low of 47.3°F (8.5°C).Humidity
In April, the average relative humidity is 78%.Rainfall
April is the month with the most rainfall. Rain falls for 13 days and accumulates 2.01" (51mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.3 snowfall days, in April, Salem aggregates 0.04" (1mm) of snow. Throughout the year, there are 16.4 snowfall days, and 2.05" (52mm) of snow is accumulated.Daylight
In Salem, the average length of the day in April is 13h and 14min.On the first day of April in Salem, sunrise is at 6:39 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 7:47 pm CDT.
Sunshine
The average sunshine in April is 8.4h.UV index
The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In April, the maximum UV index of 4 suggests these recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Salem, IL
- Average high temperature in April: 64.4°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in April: 47.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in April
Salem, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Salem, IL
- Average wind speed in April: 9.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in April
Salem, IL
- Average humidity in April: 78%
The months with the highest relative humidity are May, July and August (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Salem, IL
- Average rainfall in April: 2.01"
The wettest month (with the highest rainfall) is April (2.01").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in April
Salem, IL
- Average rainfall days in April: 13 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in April
Salem, IL
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (0.63").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Salem, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Salem, IL
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in April: 8h and 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Salem, IL
- Average sunshine days in April: 15 days
The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in April
Salem, IL
- 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
Salem, IL
- 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 June (Cloud cover 28).
Average visibility in April
Salem, IL
- 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).
