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
As March transitions into April, a change in temperatures is observed, with average highs moving from a frosty 44.4°F (6.9°C) to a mild 57°F (13.9°C). An average nighttime temperature of 38.1°F (3.4°C) is recorded during April.Humidity
April, May and July, with an average relative humidity of 79%, are the least humid months.Rainfall
The wettest months are April and June, with an average 3.74" (95mm) of rainfall.Snowfall
Months with snowfall are January through May, October through December. In Mercer, in April, snow falls for 4.2 days, with typically accumulated 1.26" (32mm) of snow. Throughout the year, there are 76.2 snowfall days, and 32.36" (822mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 21min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:46 pm. On the last day of April, sunrise is at 6:18 am and sunset at 8:17 pm EDT.
Sunshine
The average sunshine in April in Mercer is 7h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 3 in April interprets into the following advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the least humid month?
What is the average humidity in April?
What is the rainiest month?
How much does it rain in April?
How much does it snow in Mercer in April?
How many hours of daylight does Mercer have in April?
When is the sunrise / sunset in April?
How long on average sun shines in April in Mercer?
What is the UV index intensity in April?
Average temperature in April
Mercer, PA
- Average high temperature in April: 57°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in April: 38.1°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in April
Mercer, PA
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Mercer, PA
- Average wind speed in April: 7.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in April
Mercer, PA
- Average humidity in April: 79%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are April, May and July (79%).
Average rainfall in April
Mercer, PA
- Average rainfall in April: 3.74"
The wettest months (with the highest rainfall) are April and June (3.74").
The driest month (with the least rainfall) is November (2.2").
Average rainfall days in April
Mercer, PA
- Average rainfall days in April: 17.8 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in April
Mercer, PA
- Average snowfall in April: 1.26"
The month with the highest snowfall is January (8.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Mercer, PA
- Average snowfall days in April: 4.2 days
The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Mercer, PA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in April
Mercer, PA
- Average sunshine days in April: 9 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (6.2 days).
Average UV index in April
Mercer, PA
- Average UV index in April: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Mercer, PA
- Average cloud cover in April: 53
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in April
Mercer, PA
- Average visibility in April: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
Mercer, Pennsylvania, USA
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