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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Mercer, Pennsylvania, with an average temperature fluctuating between 18.3°F (-7.6°C) and 30.6°F (-0.8°C). During the coldest month, January, temperatures average a high of 30.6°F (-0.8°C) and a low of 18.3°F (-7.6°C). Weather in January »
Weather in February
February, the last month of the winter in Mercer, is a cold month, with an average temperature fluctuating between 19.9°F (-6.7°C) and 34.5°F (1.4°C). The shift into February reveals an average high-temperature of a cold 34.5°F (1.4°C), closely mirroring January's climate. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Mercer, Pennsylvania, with an average temperature ranging between max 44.4°F (6.9°C) and min 28.2°F (-2.1°C). Mercer's transition into March is marked by a temperature shift, moving from a wintry 34.5°F (1.4°C) in February to a chilly 44.4°F (6.9°C). Weather in March »
Weather in April
April in Mercer, Pennsylvania, is a moderate spring month, with an average temperature varying between 57°F (13.9°C) and 38.1°F (3.4°C). 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). Weather in April »
Weather in May
May, the last month of the spring in Mercer, is an agreeable month, with an average temperature varying between 69.4°F (20.8°C) and 49.1°F (9.5°C). The beginning of May signals a rise in the average high-temperature, moving from a mild 57°F (13.9°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Mercer, Pennsylvania, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 55.4°F (13°C). June showcases a minor temperature ascent, adjusting from May's pleasant 69.4°F (20.8°C) to a warm 76.3°F (24.6°C). Weather in June »
Weather in July
July, like June, in Mercer, Pennsylvania, is another warm summer month, with an average temperature varying between 59.5°F (15.3°C) and 80.4°F (26.9°C). In Mercer, the peak average temperatures are observed in July, with a high of 80.4°F (26.9°C) and a low of 59.5°F (15.3°C). Weather in July »
Weather in August
August, the last month of the summer in Mercer, is also a moderately hot month, with an average temperature fluctuating between 58.3°F (14.6°C) and 79.2°F (26.2°C). The introduction of August notes a subtle temperature variation to a still moderately hot 79.2°F (26.2°C) from July's 80.4°F (26.9°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Mercer, Pennsylvania, with an average temperature varying between 53.4°F (11.9°C) and 72.9°F (22.7°C). A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 79.2°F (26.2°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »
Weather in October
October, the same as September, in Mercer, Pennsylvania, is another refreshing autumn month, with an average temperature varying between 43.9°F (6.6°C) and 59.5°F (15.3°C). During Mercer's transition into October, the average high-temperature lessens, moving from an agreeable 72.9°F (22.7°C) in September to a refreshing 59.5°F (15.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Mercer, Pennsylvania, with an average temperature fluctuating between 32.9°F (0.5°C) and 46.9°F (8.3°C). The onset of November is marked by a decrease in temperature, transitioning from a refreshing 59.5°F (15.3°C) in October to a frosty 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Mercer, Pennsylvania, with an average temperature fluctuating between 37°F (2.8°C) and 26.2°F (-3.2°C). December's onset brings a slight change in high-temperatures, falling from a chilly 46.9°F (8.3°C) in November to a cold 37°F (2.8°C). Weather in December »
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
In Mercer, January is the month with the lowest recorded average temperatures, measuring a high of 30.6°F (-0.8°C) and a low of 18.3°F (-7.6°C).
How much does it rain?
In Mercer, during the entire year, the rain falls for 180.8 days and collects up to 36.65" (931mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 19.6 days and typically aggregates up to 8.27" (210mm) of snow.
How much does it snow?
Throughout the year, in Mercer, there are 76.2 snowfall days, and 32.36" (822mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 2.4h of sunshine, January has the least sunshine of the year.
What is the most humid month?
February is the most humid month, with an average relative humidity of 89%.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in Mercer?
April, May and July, with an average relative humidity of 79%, are the least humid months.
What is the rainiest month?
The wettest months are April and June, with an average 3.74" (95mm) of rainfall.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 5.
When it does not snow in Mercer?
June through September are months without snowfall in Mercer.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What part of the year is the hottest?
The warmest temperatures occur during July, when averages reach a peak of 80.4°F (26.9°C) and a low of 59.5°F (15.3°C).
What is the month with the most sunshine?
July and August, with an average of 9.9h of sunshine, are months with the most sunshine.
What is the driest month?
The month with the least rainfall is November, when the rain falls for 11.5 days and typically collects 2.2" (56mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
What is the month with the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Mercer, PA
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).
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
Mercer, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.09"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
Mercer, PA
- Average wind speed in January:
8.3mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.6mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.6mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.3mph - Average wind speed in December:
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
Mercer, PA
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
Mercer, PA
- Average rainfall in January:
2.87" - Average rainfall in February:
2.72" - Average rainfall in March:
3.03" - Average rainfall in April:
3.74" - Average rainfall in May:
3.7" - Average rainfall in June:
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
Mercer, PA
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
10.2 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
20.9 days - Average rainfall days in June:
18.1 days
- Average rainfall days in July:
19.6 days - Average rainfall days in August:
18.8 days - Average rainfall days in September:
13.8 days - Average rainfall days in October:
16.7 days - Average rainfall days in November:
11.5 days - Average rainfall days in December:
11.3 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
Mercer, PA
- Average snowfall in January:
8.27" - Average snowfall in February:
8.15" - Average snowfall in March:
4.33" - Average snowfall in April:
1.26" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
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
Mercer, PA
- Average snowfall days in January:
19.6 days - Average snowfall days in February:
17 days - Average snowfall days in March:
11.8 days - Average snowfall days in April:
4.2 days - Average snowfall days in May:
0.4 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.8 days - Average snowfall days in November:
7.5 days - Average snowfall days in December:
14.9 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 / Average sunshine
Mercer, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h 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 January:
2h and 2min - Average sunshine in February:
2h and 5min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 1min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 2min - Average sunshine in December:
2h and 5min
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
Mercer, PA
- Average sunshine days in January:
7.3 days - Average sunshine days in February:
6.2 days - Average sunshine days in March:
9.3 days - Average sunshine days in April:
9 days - Average sunshine days in May:
8.3 days - Average sunshine days in June:
9.3 days
- Average sunshine days in July:
9.2 days - Average sunshine days in August:
10.5 days - Average sunshine days in September:
14 days - Average sunshine days in October:
11.7 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
8.5 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
Mercer, PA
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
Mercer, PA
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
Mercer, PA
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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