April weather forecastChicago, IL
April
Weather in April
April witnesses a considerable shift in Chicago's weather landscape with enhanced warmth and increased daylight. This month is a relief to the residents, marking the true beginning of spring and a departure from the colder temperatures of March. Warmer temperatures become a new norm, although rainfall also increases compared to the previous month. Nowhere is the arrival of spring more apparent than in the blooming flowers that adorn Chicago's parks and gardens during April. Even as the city grapples with rain, the vibrant life bursting forth provides a counterbalance.Temperature
The arrival of April brings a change in Chicago's weather, with average high-temperatures moving from March's icy 41.5°F (5.3°C) to a cool 50.7°F (10.4°C). An average low-temperature of 40.6°F (4.8°C) is observed during April nights.Humidity
The average relative humidity in April is 77%.Rainfall
In Chicago, during April, the rain falls for 16.6 days and regularly aggregates up to 3.7" (94mm) of precipitation. Throughout the year, there are 160.2 rainfall days, and 36.97" (939mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In April, it is snowing for 2.4 days. Throughout April, 1.61" (41mm) of snow is accumulated. Throughout the year, there are 40.9 snowfall days, and 13.9" (353mm) of snow is accumulated.Ocean temperature
In Chicago, Illinois, in April, the average water temperature is 41°F (5°C).Note: It is risky to swim in 41°F (5°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
The average length of the day in April is 13h and 23min.On the first day of April, sunrise is at 6:31 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 7:48 pm CDT.
Sunshine
The average sunshine in April in Chicago is 7.8h.UV index
The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 3 in April leads to these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Chicago, IL
- Average high temperature in April: 50.7°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in April: 40.6°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in April
Chicago, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Chicago, IL
- Average wind speed in April: 11.1mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in April
Chicago, IL
- Average humidity in April: 77%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Chicago, IL
- Average rainfall in April: 3.7"
The wettest month (with the highest rainfall) is June (4.88").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in April
Chicago, IL
- Average rainfall days in April: 16.6 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in April
Chicago, IL
- Average snowfall in April: 1.61"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Chicago, IL
- Average snowfall days in April: 2.4 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Chicago, IL
- Average sea temperature in April: 40.9°F
The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).
Average daylight in April /
Average sunshine in April
Chicago, IL
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Chicago, IL
- Average sunshine days in April: 10.8 days
The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in April
Chicago, IL
- Average UV index in April: 3
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Chicago, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in April
Chicago, 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).
