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
April's arrival is marked by an increase in the average high-temperature, moving from a chilly 48.9°F (9.4°C) in March to a refreshing 60.4°F (15.8°C). Potomac's temperature tends to fall to an average low of 44.6°F (7°C) during the nights of April.Humidity
The average relative humidity in April is 75%.Rainfall
In Potomac, in April, it is raining for 14.8 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, in Potomac, there are 146.3 rainfall days, and 22.76" (578mm) of precipitation is accumulated.Snowfall
Months with snowfall in Potomac are January through April, November and December. April is the last month it regularly snows. During 1.1 snowfall days, in April, Potomac aggregates 0.28" (7mm) of snow. Throughout the year, there are 34.2 snowfall days, and 7.8" (198mm) of snow is accumulated.Daylight
In Potomac, the average length of the day in April is 13h and 19min.On the first day of April in Potomac, sunrise is at 6:33 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 7:45 pm CDT.
Sunshine
In Potomac, the average sunshine in April is 8h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during April translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Potomac?
What is the average humidity in April in Potomac?
How many days does it rain in April in Potomac?
What is the last month it snows in Potomac?
What is the average length of the day in April in Potomac?
When is the sunrise / sunset in April in Potomac?
How long on average sun shines in April in Potomac?
What is the UV index reading in April in Potomac?
Average temperature in April
Potomac, IL
- Average high temperature in April: 60.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in April: 44.6°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in April
Potomac, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Potomac, IL
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in April
Potomac, IL
- Average humidity in April: 75%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Potomac, IL
- Average rainfall in April: 2.72"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in April
Potomac, IL
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in April
Potomac, IL
- Average snowfall in April: 0.28"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Potomac, IL
- Average snowfall days in April: 1.1 days
The month with the highest number of snowfall days is January (9.8 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
Potomac, 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 24min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Potomac, IL
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in April
Potomac, IL
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Potomac, IL
- Average cloud cover in April: 46
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are June, August and September (Cloud cover 33).
Average visibility in April
Potomac, 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).
Potomac, Illinois, USA
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