April weather forecastPort Byron, IL
April
Weather in April
April in Port Byron, Illinois, is a mild spring month, with an average temperature varying between 42.4°F (5.8°C) and 59°F (15°C).Temperature
Port Byron's transition into April is marked by a temperature shift, moving from a chilly 46.8°F (8.2°C) in March to a mild 59°F (15°C). Port Byron experiences an average temperature drop to a cold 42.4°F (5.8°C) during April nights.Humidity
The average relative humidity in April is 74%.Rainfall
In Port Byron, in April, during 11.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Port Byron, during the entire year, the rain falls for 99.4 days and collects up to 9.57" (243mm) of precipitation.Snowfall
January through April, September through December are months with snowfall. April is the last month it regularly snows. During 0.8 snowfall days, in April, Port Byron aggregates 0.28" (7mm) of snow. In Port Byron, Illinois, during the entire year, snow falls for 24.5 days and aggregates up to 4.09" (104mm) of snow.Daylight
In April, the average length of the day is 13h and 22min.On the first day of April in Port Byron, sunrise is at 6:42 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 7:58 pm CDT.
Sunshine
In April, the average sunshine is 7.6h.UV index
The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in April interprets into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Port Byron, IL
- Average high temperature in April: 59°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in April
Port Byron, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Port Byron, 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 (6.7mph).
Average humidity in April
Port Byron, IL
- Average humidity in April: 74%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Port Byron, IL
- Average rainfall in April: 1.02"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in April
Port Byron, IL
- Average rainfall days in April: 11.8 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in April
Port Byron, IL
- Average snowfall in April: 0.28"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in April
Port Byron, IL
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Port Byron, IL
- Average daylight in April: 13h and 24min
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 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Port Byron, IL
- Average sunshine days in April: 16.7 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).
Average UV index in April
Port Byron, IL
- Average UV index in April: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Port Byron, IL
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Port Byron, 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).
