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
Observing a rise in April, the average high-temperature goes from March's frosty 45.5°F (7.5°C) to a refreshing 56.7°F (13.7°C). Throughout the month of April, Thornton witnesses an average low-temperature of 41.7°F (5.4°C).Humidity
In April, the average relative humidity is 75%.Rainfall
In Thornton, in April, it is raining for 16.8 days, with typically 3.43" (87mm) of accumulated precipitation. Throughout the year, there are 155.6 rainfall days, and 31.3" (795mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 1.9 snowfall days, in April, Thornton aggregates 1.97" (50mm) of snow. In Thornton, during the entire year, snow falls for 44.6 days and aggregates up to 16.46" (418mm) of snow.Daylight
In Thornton, the average length of the day in April is 13h and 22min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:16 pm. On the last day of April, in Thornton, sunrise is at 5:47 am and sunset at 7:47 pm CDT.
Sunshine
In April, the average sunshine is 7.6h.UV index
The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 3 in April leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April in Thornton?
How many days does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Thornton have in April?
How high is the UV index in April?
Average temperature in April
Thornton, IL
- Average high temperature in April: 56.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in April
Thornton, 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
Thornton, IL
- Average wind speed in April: 9.8mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in April
Thornton, IL
- Average humidity in April: 75%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Thornton, IL
- Average rainfall in April: 3.43"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in April
Thornton, IL
- Average rainfall days in April: 16.8 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in April
Thornton, IL
- Average snowfall in April: 1.97"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Thornton, IL
- Average snowfall days in April: 1.9 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Thornton, IL
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in April
Thornton, IL
- Average sunshine days in April: 10.2 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in April
Thornton, IL
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Thornton, IL
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Thornton, IL
- 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).
Thornton, Illinois, USA
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