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 onset of April marks an increase in the average high-temperature, moving from a chilly 47.5°F (8.6°C) in March to a refreshing 59.5°F (15.3°C). An average low-temperature of 43.2°F (6.2°C) is observed during April nights.Humidity
The average relative humidity in April is 76%.Rainfall
In Keystone, in April, it is raining for 14.8 days, with typically 1.81" (46mm) of accumulated precipitation. In Keystone, during the entire year, the rain falls for 137.2 days and collects up to 17.95" (456mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 1.2 snowfall days, in April, Keystone aggregates 0.39" (10mm) of snow. Throughout the year, there are 35.6 snowfall days, and 7.64" (194mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 19min.On the first day of April, sunrise is at 7:23 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 8:36 pm EDT.
Sunshine
The average sunshine in April is 7h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 4 during April leads to these instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Stay sun-safe with clothing that is both closely woven and worn loosely. 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 is the average April temperature?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the average length of the day in April in Keystone?
When are sunrise and sunset in April?
How many hours of sunshine does Keystone have in April?
What is the UV index intensity in April?
Average temperature in April
Keystone, IN
- Average high temperature in April: 59.5°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in April: 43.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in April
Keystone, IN
- Average pressure in April: 29.96"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Keystone, IN
- Average wind speed in April: 10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in April
Keystone, IN
- Average humidity in April: 76%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Keystone, IN
- Average rainfall in April: 1.81"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in April
Keystone, IN
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in April
Keystone, IN
- Average snowfall in April: 0.39"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Keystone, IN
- Average snowfall days in April: 1.2 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Keystone, IN
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in April
Keystone, IN
- Average sunshine days in April: 13.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in April
Keystone, IN
- 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 December (UV index 1).
Average cloud cover in April
Keystone, IN
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in April
Keystone, IN
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Keystone, Indiana, USA
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