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 into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 47.5°F (8.6°C) to a moderate 59.5°F (15.3°C). April's average low-temperature reading settles at a chilly 43.2°F (6.2°C).Humidity
In Keystone, the average relative humidity in April is 76%.Rainfall
In April, the rain falls for 14.8 days. Throughout April, 1.81" (46mm) of precipitation is accumulated. In Keystone, during the entire year, the rain falls for 137.2 days and collects up to 17.95" (456mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1.2 snowfall days, in April, Keystone aggregates 0.39" (10mm) of snow. In Keystone, during the entire year, snow falls for 35.6 days and aggregates up to 7.64" (194mm) of snow.Daylight
The average length of the day in April is 13h and 19min.On the first day of April in Keystone, 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 in Keystone is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In April, the maximum UV index of 4 transforms into these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
What are April temperatures in Keystone?
What is the average humidity in April in Keystone?
How many days does it rain in April in Keystone?
What is the last month it snows in Keystone?
How many hours of daylight does Keystone have in April?
What time are sunrise and sunset in April in Keystone?
How long on average sun shines in April in Keystone?
What is the UV index reading in April in Keystone?
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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