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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, in Mertztown, Pennsylvania, is an icy winter month, with temperature in the range of an average low of 21.6°F (-5.8°C) and an average high of 34.3°F (1.3°C). Mertztown's coldest weather arrives in January, when temperatures average a high of 34.3°F (1.3°C) and a low of 21.6°F (-5.8°C). Weather in January »
Weather in February
February, the last month of the winter in Mertztown, is also a wintry month, with temperature in the range of an average low of 23.4°F (-4.8°C) and an average high of 37.9°F (3.3°C). Mertztown, Pennsylvania, signifies an average high-temperature of a still icy 37.9°F (3.3°C) in February, closely mirroring the 34.3°F (1.3°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Mertztown, Pennsylvania, with temperature in the range of an average low of 30.6°F (-0.8°C) and an average high of 46.6°F (8.1°C). March's onset brings a minor rise in the average high-temperature, moving from an icy 37.9°F (3.3°C) in February to a frosty 46.6°F (8.1°C). Weather in March »
Weather in April
April is a refreshing spring month in Mertztown, Pennsylvania, with an average temperature ranging between max 59°F (15°C) and min 40.5°F (4.7°C). Mertztown sees a rise in temperature during April, with average high-temperatures transitioning from a frosty 46.6°F (8.1°C) in March to a mild 59°F (15°C). Weather in April »
Weather in May
May, the last month of the spring in Mertztown, is a pleasant month, with an average temperature ranging between max 69.8°F (21°C) and min 50.7°F (10.4°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a refreshing 59°F (15°C) in April to a pleasant 69.8°F (21°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Mertztown, Pennsylvania, with an average temperature ranging between min 58.3°F (14.6°C) and max 77.5°F (25.3°C). The onset of June brings a minor temperature shift, with the average high-temperature moving from a pleasant 69.8°F (21°C) in May to a moderately hot 77.5°F (25.3°C). Weather in June »
Weather in July
July, like June, in Mertztown, Pennsylvania, is a moderately hot summer month, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 63.5°F (17.5°C). July brings the highest temperatures, with an average high of 83.8°F (28.8°C) and an average low of 63.5°F (17.5°C). July's mean heat index is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Mertztown, Pennsylvania, with temperature in the range of an average low of 61.5°F (16.4°C) and an average high of 81.1°F (27.3°C). An average high-temperature of a still moderately hot 81.1°F (27.3°C) marks August, exhibiting a close resemblance to the conditions in July. Weather in August »
Weather in September
September, the first month of the autumn in Mertztown, is still a warm month, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 74.5°F (23.6°C). As September commences, the average high-temperature subtly reduces, transitioning from 81.1°F (27.3°C) in August to a still warm 74.5°F (23.6°C). Weather in September »
Weather in October
October, like September, in Mertztown, Pennsylvania, is another comfortable autumn month, with an average temperature ranging between max 62.1°F (16.7°C) and min 46°F (7.8°C). October comes with a decrease in the average high-temperature, falling from a moderately hot 74.5°F (23.6°C) in September to an enjoyable 62.1°F (16.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Mertztown, Pennsylvania, with an average temperature ranging between max 50°F (10°C) and min 35.2°F (1.8°C). Mertztown's November weather features a mild decline in high-temperatures, reducing from a comfortable 62.1°F (16.7°C) in October to a fresh 50°F (10°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Mertztown, Pennsylvania, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 40.3°F (4.6°C). Mertztown's average high-temperature decreases in December, falling from a fresh 50°F (10°C) in November to a wintry 40.3°F (4.6°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 is the coldest month?
January is the month when Mertztown experiences its coldest temperatures, averaging a high of 34.3°F (1.3°C) and a low of 21.6°F (-5.8°C).
How much does it rain in Mertztown?
In Mertztown, during the entire year, the rain falls for 155.8 days and collects up to 30.75" (781mm) of precipitation.
When does it snow?
Months with snowfall in Mertztown are January through May, October through December.
How many days does it snow?
Throughout the year, there are 29.4 snowfall days, and 15.87" (403mm) of snow is accumulated.
What are the months with the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the most humid month?
With an average relative humidity of 82%, February is the most humid month.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.4h of sunshine.
What is the snowiest month?
March is the month with the most snowfall. Snow falls for 5.6 days and accumulates 4.29" (109mm) of snow.
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 are the least humid months?
April and July, with an average relative humidity of 76%, are the least humid months.
What is the rainiest month?
The month with the most rainfall is April, when the rain falls for 16.3 days and typically aggregates up to 2.99" (76mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest?
Mertztown's warmest month, July, registers temperatures that range from a high of 83.8°F (28.8°C) to a low of 63.5°F (17.5°C).
What month has the most sunshine?
With an average of 10.4h of sunshine, July has the most sunshine of the year.
What is the driest month in Mertztown?
September is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.77" (45mm) 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.
Average temperature
Mertztown, PA
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.3°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Mertztown, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"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
Mertztown, PA
- Average wind speed in January:
8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.9mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.6mph - Average wind speed in November:
7mph - Average wind speed in December:
7.6mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Mertztown, PA
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall
Mertztown, PA
- Average rainfall in January:
2.36" - Average rainfall in February:
2.13" - Average rainfall in March:
2.56" - Average rainfall in April:
2.99" - Average rainfall in May:
2.91" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.87" - Average rainfall in September:
1.77" - Average rainfall in October:
2.68" - Average rainfall in November:
2.44" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days
Mertztown, PA
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
14.7 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
13.3 days - Average rainfall days in November:
10.3 days - Average rainfall days in December:
11.2 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.5 days).
Average snowfall
Mertztown, PA
- Average snowfall in January:
4.17" - Average snowfall in February:
3.78" - Average snowfall in March:
4.29" - Average snowfall in April:
0.2" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is March (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Mertztown, PA
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
8.4 days - Average snowfall days in March:
5.6 days - Average snowfall days in April:
0.5 days - Average snowfall days in May:
0.1 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:
0.1 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mertztown, 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 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - 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 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days
Mertztown, PA
- Average sunshine days in January:
17 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
16.6 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (11.2 days).
Average UV index
Mertztown, PA
The months with the highest UV index are 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
Mertztown, PA
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility
Mertztown, PA
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).
Mertztown, Pennsylvania, USA
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