April weather forecastVergennes, IL
April
Weather in April
April is a refreshing spring month in Vergennes, Illinois, with an average temperature varying between 48.4°F (9.1°C) and 66°F (18.9°C).Temperature
The transition from March to April brings a temperature rise, with average high-temperatures increasing from a cool 55°F (12.8°C) to a comfortable 66°F (18.9°C). In the month of April, the nighttime temperature dips to a steady average of 48.4°F (9.1°C).Humidity
In April, the average relative humidity is 77%.Rainfall
April is the month with the most rainfall. Rain falls for 15.1 days and accumulates 3.58" (91mm) of precipitation.Snowfall
Months with snowfall in Vergennes are January through April, November and December. April is the last month it regularly snows. During 0.5 snowfall days, in April, Vergennes aggregates 0.08" (2mm) of snow. In Vergennes, during the entire year, snow falls for 18 days and aggregates up to 4.53" (115mm) of snow.Daylight
In Vergennes, the average length of the day in April is 13h and 13min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:20 pm. On the last day of April, sunrise is at 6:01 am and sunset at 7:47 pm CDT.
Sunshine
The average sunshine in April is 8.5h.UV index
In Vergennes, 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 average individuals.Note: The maximum daily UV index of 4 during April translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Vergennes, IL
- Average high temperature in April: 66°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in April: 48.4°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in April
Vergennes, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Vergennes, IL
- Average wind speed in April: 9.3mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in April
Vergennes, 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
Vergennes, IL
- Average rainfall in April: 3.58"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in April
Vergennes, IL
- Average rainfall days in April: 15.1 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is December (8.2 days).
Average snowfall in April
Vergennes, IL
- Average snowfall in April: 0.08"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Vergennes, IL
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (5.4 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
Vergennes, IL
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in April
Vergennes, IL
- Average sunshine days in April: 12.4 days
The months with the most sunshine days are October and November (19.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in April
Vergennes, 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
Vergennes, IL
- Average cloud cover in April: 42
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in April
Vergennes, 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).
