April weather forecastSouthwest, PA
April
Weather in April
April in Southwest, Pennsylvania, is a refreshing spring month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 59.5°F (15.3°C).Temperature
The start of April brings a rise in the average high-temperature, moving from a frosty 46.8°F (8.2°C) in March to a moderate 59.5°F (15.3°C). Throughout the month of April, Southwest sees a steady low-temperature average of 40.6°F (4.8°C).Humidity
April, July and August, with an average relative humidity of 77%, are the least humid months.Rainfall
In April, the rain falls for 18.2 days. Throughout April, 3.23" (82mm) of precipitation is accumulated. In Southwest, during the entire year, the rain falls for 185.4 days and collects up to 34.02" (864mm) of precipitation.Snowfall
Months with snowfall in Southwest are January through May, October through December. In Southwest, during April, snow falls for 2.9 days and regularly aggregates up to 1.1" (28mm) of snow. In Southwest, during the entire year, snow falls for 63.2 days and aggregates up to 29.02" (737mm) of snow.Daylight
The average length of the day in April is 13h and 18min.On the first day of April, sunrise is at 7:00 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 8:12 pm EDT.
Sunshine
The average sunshine in April is 7.7h.UV index
In Southwest, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 in April translates into these instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Southwest, PA
- Average high temperature in April: 59.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in April: 40.6°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in April
Southwest, PA
- Average pressure in April: 29.98"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
Southwest, PA
- Average wind speed in April: 7.8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in April
Southwest, PA
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in April
Southwest, PA
- Average rainfall in April: 3.23"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in April
Southwest, PA
- Average rainfall days in April: 18.2 days
The month with the highest number of rainy days is May (22 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in April
Southwest, PA
- Average snowfall in April: 1.1"
The month with the highest snowfall is January (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Southwest, PA
- Average snowfall days in April: 2.9 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Southwest, PA
- Average daylight in April: 13h and 18min
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: 7h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in April
Southwest, PA
- Average sunshine days in April: 9.8 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is January (6.5 days).
Average UV index in April
Southwest, PA
- Average UV index in April: 4
The month with the highest UV index is 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
Southwest, PA
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in April
Southwest, PA
- Average visibility in April: 6mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
