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
The shift from March to April brings an increase in the average high-temperature, moving from a fresh 51.1°F (10.6°C) to an enjoyable 63.1°F (17.3°C). During April, the nighttime temperature in Old Saint Louis averages to a frosty 45.9°F (7.7°C).Humidity
In April, the average relative humidity in Old Saint Louis is 77%.Rainfall
In Old Saint Louis, in April, during 16 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. Throughout the year, in Old Saint Louis, there are 163.5 rainfall days, and 29.29" (744mm) of precipitation is accumulated.Snowfall
Months with snowfall in Old Saint Louis, Indiana, are January through April, November and December. April is the last month it regularly snows in Old Saint Louis, Indiana. During 0.8 snowfall days, in April, Old Saint Louis aggregates 0.16" (4mm) of snow. Throughout the year, there are 34.1 snowfall days, and 8.54" (217mm) of snow is accumulated.Daylight
In Old Saint Louis, the average length of the day in April is 13h and 16min.On the first day of the month, sunrise is at 7:26 am and sunset at 8:07 pm. On the last day of April, sunrise is at 6:44 am and sunset at 8:35 pm EDT.
Sunshine
In Old Saint Louis, the average sunshine in April is 7.4h.UV index
The average daily maximum UV index in April in Old Saint Louis is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In April, the maximum UV index of 4 translates into these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Old Saint Louis in April?
What is the average humidity in April in Old Saint Louis?
How many days does it rain in April in Old Saint Louis?
What is the last month it snows in Old Saint Louis?
How many hours of daylight does Old Saint Louis have in April?
What time are sunrise and sunset in April in Old Saint Louis?
How long on average sun shines in April in Old Saint Louis?
What is the UV index intensity in April in Old Saint Louis?
Average temperature in April
Old Saint Louis, IN
- Average high temperature in April: 63.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in April: 45.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in April
Old Saint Louis, IN
- Average pressure in April: 29.96"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
Old Saint Louis, IN
- Average wind speed in April: 8.7mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in April
Old Saint Louis, IN
- Average humidity in April: 77%
The months with the highest relative humidity are January, February, July and December (81%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Old Saint Louis, IN
- Average rainfall in April: 3.23"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in April
Old Saint Louis, IN
- Average rainfall days in April: 16 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (9.4 days).
Average snowfall in April
Old Saint Louis, IN
- Average snowfall in April: 0.16"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Old Saint Louis, IN
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (9.6 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
Old Saint Louis, IN
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in April: 7h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in April
Old Saint Louis, IN
- Average sunshine days in April: 11.8 days
The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in April
Old Saint Louis, IN
- 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
Old Saint Louis, IN
- Average cloud cover in April: 44
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Old Saint Louis, IN
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are July and December (5mi).
Old Saint Louis, Indiana, USA
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