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 Marys sees an increase in the average high-temperature with the arrival of April, moving from March's frosty 47.8°F (8.8°C) to a moderate 59.9°F (15.5°C). Throughout April nights, Saint Marys registers an average low-temperature of 42.4°F (5.8°C).Humidity
The average relative humidity in April is 73%.Rainfall
In April, the rain falls for 13 days. Throughout April, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 118.9 rainfall days, and 18.62" (473mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Saint Marys, during April, snow falls for 0.9 days and regularly aggregates up to 0.63" (16mm) of snow. Throughout the year, there are 31.9 snowfall days, and 10.12" (257mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 21min.On the first day of April, sunrise is at 6:56 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:11 pm CDT.
Sunshine
In April, the average sunshine in Saint Marys is 8.1h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 4 during April, leads to the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Saint Marys in April?
What is the average humidity in April in Saint Marys?
How many days does it rain in April?
How many days does it snow in April?
What is the average length of the day in April?
When are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index reading in April in Saint Marys?
Average temperature in April
Saint Marys, IA
- Average high temperature in April: 59.9°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in April
Saint Marys, IA
- Average pressure in April: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Saint Marys, IA
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in April
Saint Marys, IA
- Average humidity in April: 73%
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Saint Marys, IA
- Average rainfall in April: 1.81"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in April
Saint Marys, IA
- Average rainfall days in April: 13 days
The months with the highest number of rainy days are May and June (15.9 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in April
Saint Marys, IA
- Average snowfall in April: 0.63"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Saint Marys, IA
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (9.7 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 Marys, IA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 8h and 1min
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 18min).
Average sunshine days in April
Saint Marys, IA
- Average sunshine days in April: 14.7 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (11 days).
Average UV index in April
Saint Marys, IA
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Saint Marys, IA
- Average cloud cover in April: 44
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in April
Saint Marys, IA
- 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).
Saint Marys, Iowa, USA
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