April weather forecastChatham, IL
April
Weather in April
April is a refreshing spring month in Chatham, Illinois, with an average temperature varying between 63.3°F (17.4°C) and 46.2°F (7.9°C).Temperature
April's arrival sees a rise in the average high-temperature, jumping from March's fresh 51.4°F (10.8°C) to a refreshing 63.3°F (17.4°C). Nighttime temperature experiences an average drop to a frosty 46.2°F (7.9°C) in April.Humidity
In April, the average relative humidity is 75%.Rainfall
In Chatham, in April, it is raining for 11.3 days, with typically 1.06" (27mm) of accumulated precipitation. In Chatham, during the entire year, the rain falls for 104.2 days and collects up to 9.29" (236mm) 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, Chatham aggregates 0.04" (1mm) of snow. In Chatham, Illinois, during the entire year, snow falls for 18.6 days and aggregates up to 2.68" (68mm) of snow.Daylight
The average length of the day in April in Chatham is 13h and 17min.On the first day of April in Chatham, sunrise is at 6:41 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 7:52 pm CDT.
Sunshine
In April, the average sunshine is 8.3h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, the maximum UV index of 4 suggests this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Chatham, IL
- Average high temperature in April: 63.3°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in April: 46.2°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in April
Chatham, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Chatham, IL
- Average wind speed in April: 10.2mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in April
Chatham, IL
- Average humidity in April: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Chatham, IL
- Average rainfall in April: 1.06"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in April
Chatham, IL
- Average rainfall days in April: 11.3 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in April
Chatham, IL
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Chatham, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (5.7 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
Chatham, IL
- Average daylight in April: 13h and 18min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 8h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Chatham, IL
- Average sunshine days in April: 16.2 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index in April
Chatham, 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
Chatham, IL
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in April
Chatham, 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).
