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
As Seneca transitions into April, the average high-temperature is observed to rise from a chilly 46.9°F (8.3°C) in March to a moderate 58.8°F (14.9°C). Seneca observes an average nighttime low-temperature of 42.4°F (5.8°C) during the month of April.Humidity
The average relative humidity in April is 74%.Rainfall
In April, the rain falls for 17.7 days. Throughout April, 3.86" (98mm) of precipitation is accumulated. In Seneca, during the entire year, the rain falls for 154.1 days and collects up to 31.73" (806mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows in Seneca. During 1.4 snowfall days, in April, Seneca aggregates 1.46" (37mm) of snow. Throughout the year, there are 39.8 snowfall days, and 15.71" (399mm) of snow is accumulated.Daylight
In Seneca, Illinois, the average length of the day in April is 13h and 21min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:20 pm. On the last day of April, sunrise is at 5:51 am and sunset at 7:51 pm CDT.
Sunshine
The average sunshine in April is 7.8h.UV index
In Seneca, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 3 in April leads to these recommendations:
Take precautions - Protection against sun damage is advised. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What are April temperatures in Seneca?
What is the average humidity in April in Seneca?
How many days does it rain in April in Seneca?
What is the last month it snows in Seneca?
How many hours of daylight does Seneca have in April?
When is the sunrise / sunset in April in Seneca?
How many hours of sunshine does Seneca have in April?
How high is the UV index in April in Seneca?
Average temperature in April
Seneca, IL
- Average high temperature in April: 58.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in April
Seneca, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Seneca, IL
- Average wind speed in April: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in April
Seneca, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Seneca, IL
- Average rainfall in April: 3.86"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in April
Seneca, IL
- Average rainfall days in April: 17.7 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in April
Seneca, IL
- Average snowfall in April: 1.46"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Seneca, IL
- Average snowfall days in April: 1.4 days
The month with the highest number of snowfall days is January (11.9 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
Seneca, 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 18min).
- Average sunshine in April: 7h and 5min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Seneca, IL
- Average sunshine days in April: 10.6 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in April
Seneca, 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 January (UV index 1).
Average cloud cover in April
Seneca, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in April
Seneca, IL
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Seneca, Illinois, USA
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