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
Mercersburg's weather shows a temperature rise with the arrival of April, moving from a frosty 48.6°F (9.2°C) in March to a refreshing 61.2°F (16.2°C). Throughout the month of April, Mercersburg reports a steady low-temperature average of 41.5°F (5.3°C).Humidity
April and July, with an average relative humidity of 75%, are the least humid months in Mercersburg.Rainfall
In Mercersburg, in April, it is raining for 16.7 days, with typically 2.99" (76mm) of accumulated precipitation. In Mercersburg, Pennsylvania, during the entire year, the rain falls for 170.5 days and collects up to 31.02" (788mm) of precipitation.Snowfall
Months with snowfall in Mercersburg, Pennsylvania, are January through April, October through December. April is the last month it regularly snows in Mercersburg. During 1.3 snowfall days, in April, Mercersburg aggregates 0.51" (13mm) of snow. In Mercersburg, Pennsylvania, during the entire year, snow falls for 33.6 days and aggregates up to 17.91" (455mm) of snow.Daylight
In April, the average length of the day in Mercersburg is 13h and 17min.On the first day of April in Mercersburg, sunrise is at 6:54 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:05 pm EDT.
Sunshine
In Mercersburg, the average sunshine in April is 8.4h.UV index
The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 3 in April transforms into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What are the temperatures in Mercersburg in April?
What are the least humid months in Mercersburg?
What is the average humidity in April in Mercersburg?
How much does it rain in Mercersburg in April?
What is the last month it snows in Mercersburg?
What is the average length of the day in April in Mercersburg?
When are sunrise and sunset in April in Mercersburg?
How long on average sun shines in April in Mercersburg?
What is the UV index intensity in April in Mercersburg?
Average temperature in April
Mercersburg, PA
- Average high temperature in April: 61.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in April: 41.5°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in April
Mercersburg, 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
Mercersburg, PA
- Average wind speed in April: 7.3mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in April
Mercersburg, PA
- Average humidity in April: 75%
The months with the highest relative humidity are February, May, October and December (79%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in April
Mercersburg, PA
- Average rainfall in April: 2.99"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in April
Mercersburg, PA
- Average rainfall days in April: 16.7 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in April
Mercersburg, PA
- Average snowfall in April: 0.51"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Mercersburg, PA
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Mercersburg, PA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 January (Average sunshine: 4h and 36min).
Average sunshine days in April
Mercersburg, PA
- Average sunshine days in April: 11 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in April
Mercersburg, PA
- Average UV index in April: 3
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
Mercersburg, PA
- Average cloud cover in April: 45
The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in April
Mercersburg, PA
- Average visibility in April: 6mi
The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).
Mercersburg, Pennsylvania, USA
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