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 sees a temperature increase, moving from a fresh 53.4°F (11.9°C) in March to a comfortable 64.4°F (18°C). During the month of April, an average temperature of 46.9°F (8.3°C) is noted during the nights in East Alton, Illinois.Humidity
In East Alton, the average relative humidity in April is 76%.Rainfall
In April, in East Alton, the rain falls for 13.4 days. Throughout April, 2.4" (61mm) of precipitation is accumulated. In East Alton, during the entire year, the rain falls for 138 days and collects up to 23.9" (607mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in East Alton. April is the last month it regularly snows. During 0.3 snowfall days, in April, East Alton aggregates 0.04" (1mm) of snow. Throughout the year, there are 18.6 snowfall days, and 4.53" (115mm) of snow is accumulated.Daylight
In April, the average length of the day in East Alton is 13h and 15min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:24 pm. On the last day of April, in East Alton, sunrise is at 6:02 am and sunset at 7:52 pm CDT.
Sunshine
In East Alton, the average sunshine in April is 8.5h.UV index
The average daily maximum UV index in April in East Alton is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 4 in April suggests the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in East Alton?
What is the average humidity in April in East Alton?
How many days does it rain in April in East Alton?
What is the last month it snows in East Alton?
What is the average length of the day in April in East Alton?
When are sunrise and sunset in April in East Alton?
How many hours of sunshine does East Alton have in April?
How high is the UV index in April in East Alton?
Average temperature in April
East Alton, IL
- Average high temperature in April: 64.4°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in April: 46.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in April
East Alton, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
East Alton, 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 month (with the lowest average wind speed) is July (5.7mph).
Average humidity in April
East Alton, IL
- Average humidity in April: 76%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
East Alton, IL
- Average rainfall in April: 2.4"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in April
East Alton, IL
- Average rainfall days in April: 13.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in April
East Alton, IL
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
East Alton, IL
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (6 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
East Alton, IL
- Average daylight in April: 13h and 1min
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 30min).
- Average sunshine in April: 8h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in April
East Alton, IL
- Average sunshine days in April: 15.3 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in April
East Alton, IL
- Average UV index in April: 4
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, November and December (UV index 2).
Average cloud cover in April
East Alton, IL
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in April
East Alton, 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).
East Alton, Illinois, USA
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