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
With the onset of April, South Mountain sees a temperature rise, with the average high-temperature moving from March's frosty 48.7°F (9.3°C) to a comfortable 61.2°F (16.2°C). Throughout April, South Mountain witnesses a nighttime temperature average of 41.7°F (5.4°C).Humidity
The average relative humidity in April in South Mountain is 76%.Rainfall
In April, the rain falls for 13.5 days. Throughout April, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 125.3 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
Months with snowfall in South Mountain are January through April, November and December. April is the last month it regularly snows in South Mountain, Pennsylvania. During 0.4 snowfall days, in April, South Mountain aggregates 0.04" (1mm) of snow. In South Mountain, Pennsylvania, during the entire year, snow falls for 20.2 days and aggregates up to 3.54" (90mm) of snow.Daylight
In South Mountain, the average length of the day in April is 13h and 17min.On the first day of April, sunrise is at 6:52 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:03 pm EDT.
Sunshine
In South Mountain, the average sunshine in April is 8.4h.UV index
In South Mountain, the average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 4 in April leads to these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What is the usual temperature for South Mountain in April?
What is the average humidity in April in South Mountain?
How much does it rain in South Mountain in April?
What is the last month it snows in South Mountain?
What is the average length of the day in April in South Mountain?
What time are sunrise and sunset in April in South Mountain?
How many hours of sunshine does South Mountain have in April?
What is the UV index reading in April in South Mountain?
Average temperature in April
South Mountain, PA
- Average high temperature in April: 61.2°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in April
South Mountain, PA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in April
South Mountain, PA
- Average wind speed in April: 7.8mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in April
South Mountain, PA
- Average humidity in April: 76%
The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in April
South Mountain, PA
- Average rainfall in April: 1.02"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in April
South Mountain, PA
- Average rainfall days in April: 13.5 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in April
South Mountain, PA
- Average snowfall in April: 0.04"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
South Mountain, PA
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
South Mountain, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in April
South Mountain, PA
- Average sunshine days in April: 14.3 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in April
South Mountain, PA
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
South Mountain, PA
- Average cloud cover in April: 45
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in April
South Mountain, PA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
South Mountain, Pennsylvania, USA
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