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
McLean in April shows a temperature shift, moving from an average high of a frosty 49.5°F (9.7°C) in March to a comfortable 61.3°F (16.3°C). In April, the nighttime temperature lowers to an average of 45.1°F (7.3°C).Humidity
In McLean, the average relative humidity in April is 74%.Rainfall
In McLean, in April, it is raining for 14 days, with typically 1.93" (49mm) of accumulated precipitation. In McLean, during the entire year, the rain falls for 135 days and collects up to 17.72" (450mm) of precipitation.Snowfall
Months with snowfall in McLean are January through April, November and December. April is the last month it regularly snows. During 0.8 snowfall days, in April, McLean aggregates 0.28" (7mm) of snow. Throughout the year, there are 27.1 snowfall days, and 7.2" (183mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 19min.On the first day of April in McLean, Illinois, sunrise is at 6:39 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 7:51 pm CDT.
Sunshine
In April, the average sunshine is 8.1h.UV index
The average daily maximum UV index in April in McLean is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 4 during April translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in McLean?
What is the average humidity in April in McLean?
How much does it rain in McLean in April?
What is the last month it snows in McLean?
What is the average length of the day in April in McLean?
When are sunrise and sunset in April in McLean?
How long on average sun shines in April in McLean?
What is the UV index reading in April in McLean?
Average temperature in April
McLean, IL
- Average high temperature in April: 61.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in April: 45.1°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in April
McLean, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
McLean, IL
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in April
McLean, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
McLean, IL
- Average rainfall in April: 1.93"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days in April
McLean, IL
- Average rainfall days in April: 14 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in April
McLean, IL
- Average snowfall in April: 0.28"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
McLean, IL
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (9.5 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
McLean, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in April
McLean, IL
- Average sunshine days in April: 14 days
The months with the most sunshine days are November and December (20 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in April
McLean, IL
- Average UV index in April: 4
The months with the highest UV index are 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
McLean, IL
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in April
McLean, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
McLean, Illinois, USA
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