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 from March to April sees an increase in the average high-temperature, transitioning from a chilly 46.9°F (8.3°C) to a moderate 59.4°F (15.2°C). Mount Gretna's nights in April experience an average temperature drop to a cold 41.4°F (5.2°C).Humidity
The least humid month in Mount Gretna, Pennsylvania, is April, with an average relative humidity of 76%.Rainfall
In April, the rain falls for 12.7 days. Throughout April, 1.26" (32mm) of precipitation is accumulated. In Mount Gretna, during the entire year, the rain falls for 137.4 days and collects up to 16.26" (413mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In April, it is snowing for 0.3 days. Throughout April, 0.04" (1mm) of snow is accumulated. Throughout the year, in Mount Gretna, there are 19.5 snowfall days, and 6.69" (170mm) of snow is accumulated.Daylight
In April, the average length of the day in Mount Gretna is 13h and 18min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:30 pm. On the last day of April, sunrise is at 6:05 am and sunset at 8:00 pm EDT.
Sunshine
The average sunshine in April in Mount Gretna is 8.1h.UV index
In Mount Gretna, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 in April translates into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What are April temperatures in Mount Gretna?
What is the least humid month in Mount Gretna?
What is the average humidity in April in Mount Gretna?
How much does it rain in Mount Gretna in April?
How much does it snow in Mount Gretna in April?
What is the average length of the day in April in Mount Gretna?
What time are sunrise and sunset in April in Mount Gretna?
How long on average sun shines in April in Mount Gretna?
How high is the UV index in April in Mount Gretna?
Average temperature in April
Mount Gretna, PA
- Average high temperature in April: 59.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in April
Mount Gretna, PA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Mount Gretna, PA
- Average wind speed in April: 8.6mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in April
Mount Gretna, PA
- Average humidity in April: 76%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in April
Mount Gretna, PA
- Average rainfall in April: 1.26"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in April
Mount Gretna, PA
- Average rainfall days in April: 12.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in April
Mount Gretna, PA
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Mount Gretna, PA
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Mount Gretna, PA
- 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: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in April
Mount Gretna, PA
- Average sunshine days in April: 15.3 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in April
Mount Gretna, PA
- Average UV index in April: 4
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Mount Gretna, PA
- Average cloud cover in April: 46
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in April
Mount Gretna, PA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Mount Gretna, Pennsylvania, USA
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