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 transition to April introduces an increase in the average high-temperature, shifting from a frosty 49.3°F (9.6°C) in March to a refreshing 61°F (16.1°C). Castleton experiences an average low-temperature reading of 44.8°F (7.1°C) throughout April.Humidity
In Castleton, the average relative humidity in April is 76%.Rainfall
In April, the rain falls for 13.9 days. Throughout April, 2.36" (60mm) of precipitation is accumulated. In Castleton, during the entire year, the rain falls for 141 days and collects up to 20.98" (533mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 0.9 snowfall days, in April, Castleton aggregates 0.16" (4mm) of snow. In Castleton, during the entire year, snow falls for 29.1 days and aggregates up to 7.99" (203mm) of snow.Daylight
In Castleton, the average length of the day in April is 13h and 17min.On the first day of April, sunrise is at 7:26 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 8:38 pm EDT.
Sunshine
In Castleton, the average sunshine in April is 6.9h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 during April translates into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
When is the sunrise / sunset in April?
How long on average sun shines in April?
What is the UV index reading in April?
Average temperature in April
Castleton, IN
- Average high temperature in April: 61°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in April: 44.8°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 (20.7°F).
Average pressure in April
Castleton, IN
- Average pressure in April: 29.95"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Castleton, IN
- Average wind speed in April: 9.8mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in April
Castleton, IN
- Average humidity in April: 76%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Castleton, IN
- Average rainfall in April: 2.36"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in April
Castleton, IN
- Average rainfall days in April: 13.9 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (6 days).
Average snowfall in April
Castleton, IN
- Average snowfall in April: 0.16"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Castleton, IN
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Castleton, 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 24min).
- Average sunshine in April: 6h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Castleton, IN
- Average sunshine days in April: 13.8 days
The months with the most sunshine days are October and November (18.7 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in April
Castleton, 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
Castleton, IN
- Average cloud cover in April: 47
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in April
Castleton, IN
- 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).
Castleton, Indiana, USA
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