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
Saint Louis's transition into April sees a rise in the average high-temperature, advancing from an icy 40.8°F (4.9°C) in March to a cool 52.9°F (11.6°C). April brings with it a nighttime average temperature of 36.3°F (2.4°C) in Saint Louis.Humidity
With an average relative humidity of 75%, April is the least humid month.Rainfall
In Saint Louis, Michigan, in April, during 14.5 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Saint Louis, during the entire year, the rain falls for 141.3 days and collects up to 22.48" (571mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 3.3 snowfall days, in April, Saint Louis aggregates 1.65" (42mm) of snow. Throughout the year, there are 65.5 snowfall days, and 19.65" (499mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 27min.On the first day of the month, sunrise is at 7:18 am and sunset at 8:05 pm. On the last day of April, sunrise is at 6:31 am and sunset at 8:39 pm EDT.
Sunshine
The average sunshine in April in Saint Louis is 7h.UV index
The average daily maximum UV index in April in Saint Louis is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 3 in April transforms into this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. 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 are April temperatures?
What is the least humid month?
What is the average humidity in April?
How much does it rain in Saint Louis in April?
What is the last month it snows?
What is the average length of the day in April in Saint Louis?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index intensity in April in Saint Louis?
Average temperature in April
Saint Louis, MI
- Average high temperature in April: 52.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in April: 36.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in April
Saint Louis, MI
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Saint Louis, MI
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in April
Saint Louis, MI
- Average humidity in April: 75%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in April
Saint Louis, MI
- Average rainfall in April: 2.44"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in April
Saint Louis, MI
- Average rainfall days in April: 14.5 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in April
Saint Louis, MI
- Average snowfall in April: 1.65"
The month with the highest snowfall is January (5.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Saint Louis, MI
- Average snowfall days in April: 3.3 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Saint Louis, MI
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 7h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in April
Saint Louis, MI
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is January (10.3 days).
Average UV index in April
Saint Louis, MI
- Average UV index in April: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in April
Saint Louis, MI
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in April
Saint Louis, MI
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Saint Louis, Michigan, USA
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