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
An escalation in the average high-temperature is seen with the onset of April, moving from a refreshing 57.7°F (14.3°C) in March to a comfortable 67.8°F (19.9°C). April brings with it a nighttime average temperature of 48.9°F (9.4°C) in Alton.Humidity
The average relative humidity in April is 77%.Rainfall
In Alton, Missouri, in April, during 13.5 rainfall days, 4.13" (105mm) of precipitation is typically accumulated. In Alton, during the entire year, the rain falls for 148 days and collects up to 35.39" (899mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.2 snowfall days, in April, Alton aggregates 0.04" (1mm) of snow. In Alton, during the entire year, snow falls for 8.9 days and aggregates up to 4.57" (116mm) of snow.Daylight
In April, the average length of the day is 13h and 10min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:28 pm. On the last day of April, sunrise is at 6:11 am and sunset at 7:53 pm CDT.
Sunshine
In April, the average sunshine is 8.2h.UV index
The average daily maximum UV index in April is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 5 in April suggests the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
How many hours of daylight does Alton have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Alton have in April?
What is the UV index intensity in April?
Average temperature in April
Alton, MO
- Average high temperature in April: 67.8°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in April: 48.9°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 (28.4°F).
Average pressure in April
Alton, MO
- 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
Alton, MO
- Average wind speed in April: 8.1mph
The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in April
Alton, MO
- Average humidity in April: 77%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Alton, MO
- Average rainfall in April: 4.13"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in April
Alton, MO
- Average rainfall days in April: 13.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in April
Alton, MO
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Alton, MO
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Alton, MO
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in April: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in April
Alton, MO
- Average sunshine days in April: 14.5 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in April
Alton, MO
- Average UV index in April: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in April
Alton, MO
- Average cloud cover in April: 43
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in April
Alton, MO
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Alton, Missouri, USA
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