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 beginning of April signals a rise in the average high-temperature, moving from a fresh 55.2°F (12.9°C) in March to a comfortable 66.4°F (19.1°C). During April, Herrin experiences a consistent low-temperature average of 48.7°F (9.3°C).Humidity
In Herrin, the average relative humidity in April is 77%.Rainfall
The month with the most rainfall is April, when the rain falls for 13.8 days and typically aggregates up to 3.11" (79mm) of precipitation.Snowfall
Months with snowfall in Herrin are January through April, October through December. April is the last month it regularly snows. During 0.5 snowfall days, in April, Herrin aggregates 0.08" (2mm) of snow. Throughout the year, in Herrin, there are 14.5 snowfall days, and 4.13" (105mm) of snow is accumulated.Daylight
In April, the average length of the day in Herrin is 13h and 12min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:19 pm. On the last day of April, in Herrin, sunrise is at 6:00 am and sunset at 7:46 pm CDT.
Sunshine
In Herrin, the average sunshine in April is 8.6h.UV index
In April, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In April, the UV index of 5 transforms into the following advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Herrin?
What is the average humidity in April in Herrin?
What is the wettest month in Herrin?
How much does it rain in Herrin in April?
What is the last month it snows in Herrin?
What is the average length of the day in April in Herrin?
When are sunrise and sunset in April in Herrin?
How long on average sun shines in April in Herrin?
How high is the UV index in April in Herrin?
Average temperature in April
Herrin, IL
- Average high temperature in April: 66.4°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in April: 48.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in April
Herrin, IL
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Herrin, IL
- Average wind speed in April: 9.1mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in April
Herrin, IL
- Average humidity in April: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Herrin, IL
- Average rainfall in April: 3.11"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days in April
Herrin, IL
- Average rainfall days in April: 13.8 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in April
Herrin, IL
- Average snowfall in April: 0.08"
The months with the highest snowfall are January and February (0.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Herrin, IL
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is February (4.3 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
Herrin, IL
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in April
Herrin, IL
- Average sunshine days in April: 13.7 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in April
Herrin, IL
- Average UV index in April: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in April
Herrin, IL
- Average cloud cover in April: 41
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).
Average visibility in April
Herrin, 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).
Herrin, Illinois, USA
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