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
The shift from March to April is marked by an increase in the average high-temperature, moving from a chilly 48.6°F (9.2°C) to a refreshing 60.4°F (15.8°C). The average nighttime temperature in Washington lowers to a frosty 44.2°F (6.8°C) throughout April.Humidity
In Washington, the average relative humidity in April is 74%.Rainfall
In April, in Washington, the rain falls for 12.8 days. Throughout April, 2.36" (60mm) of precipitation is accumulated. In Washington, during the entire year, the rain falls for 128.3 days and collects up to 19.13" (486mm) of precipitation.Snowfall
Months with snowfall in Washington are January through April, November and December. April is the last month it regularly snows in Washington. During 0.7 snowfall days, in April, Washington aggregates 1.3" (33mm) of snow. Throughout the year, there are 29.2 snowfall days, and 9.13" (232mm) of snow is accumulated.Daylight
In Washington, the average length of the day in April is 13h and 20min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:22 pm. On the last day of April, in Washington, sunrise is at 5:56 am and sunset at 7:53 pm CDT.
Sunshine
In April, the average sunshine in Washington is 8.1h.UV index
The average daily maximum UV index in April in Washington is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during April translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Washington?
What is the average humidity in April in Washington?
How many days does it rain in April in Washington?
What is the last month it snows in Washington?
How many hours of daylight does Washington have in April?
What time are sunrise and sunset in April in Washington?
How many hours of sunshine does Washington have in April?
What is the UV index reading in April in Washington?
Average temperature in April
Washington, IL
- Average high temperature in April: 60.4°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 (30.6°F).
- Average low temperature in April: 44.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in April
Washington, 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 (29.91"Hg).
Average wind speed in April
Washington, 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 (6.5mph).
Average humidity in April
Washington, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Washington, IL
- Average rainfall in April: 2.36"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in April
Washington, IL
- Average rainfall days in April: 12.8 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in April
Washington, IL
- Average snowfall in April: 1.3"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Washington, IL
- Average snowfall days in April: 0.7 days
The month with the highest number of snowfall days is January (10.3 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
Washington, 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 18min).
- Average sunshine in April: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Washington, IL
- Average sunshine days in April: 14.8 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in April
Washington, 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
Washington, IL
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in April
Washington, 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).
Washington, Illinois, USA
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