Climate and monthly weather forecastHarleysville, PA
Climate and monthly weather forecast
Weather in January
January, like December, in Harleysville, Pennsylvania, is another cold winter month, with temperature in the range of an average low of 22.8°F (-5.1°C) and an average high of 35.2°F (1.8°C). January is the month when Harleysville experiences its coldest temperatures, averaging a high of 35.2°F (1.8°C) and a low of 22.8°F (-5.1°C). Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Harleysville, Pennsylvania, with an average temperature fluctuating between 25°F (-3.9°C) and 38.8°F (3.8°C). The high-temperature average in February for Harleysville is a still cold 38.8°F (3.8°C), staying closely aligned with January's conditions. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Harleysville, Pennsylvania, with temperature in the range of an average high of 47.5°F (8.6°C) and an average low of 32°F (0°C). The commencement of March sees a minor shift in the average high-temperature, moving from an icy 38.8°F (3.8°C) in February to a frosty 47.5°F (8.6°C). Weather in March »Weather in April
April in Harleysville, Pennsylvania, is a mild spring month, with temperature in the range of an average low of 42.1°F (5.6°C) and an average high of 60.1°F (15.6°C). As Harleysville, Pennsylvania, transitions into April, the average high-temperature shows a change, moving from a chilly 47.5°F (8.6°C) in March to a mild 60.1°F (15.6°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Harleysville, Pennsylvania, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 70.7°F (21.5°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a mild 60.1°F (15.6°C) in April to an agreeable 70.7°F (21.5°C). Weather in May »Weather in June
June, the first month of the summer in Harleysville, is a moderately hot month, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 78.8°F (26°C). June showcases a minor temperature ascent, adjusting from May's agreeable 70.7°F (21.5°C) to a warm 78.8°F (26°C). Weather in June »Weather in July
July, like June, in Harleysville, Pennsylvania, is a moderately hot summer month, with an average temperature varying between 84.6°F (29.2°C) and 65.3°F (18.5°C). Harleysville's warmest month, July, generally records average temperatures ranging from a high of 84.6°F (29.2°C) to a low of 65.3°F (18.5°C). During July, the heat index is appraised at a tropical 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Harleysville, Pennsylvania, with an average temperature ranging between max 81.9°F (27.7°C) and min 63.7°F (17.6°C). Harleysville, Pennsylvania, registers an average high-temperature of a still warm 81.9°F (27.7°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Harleysville, is still a warm month, with an average temperature ranging between max 75.4°F (24.1°C) and min 57.2°F (14°C). Harleysville records a mild change in average high-temperature during September, easing from a moderately hot 81.9°F (27.7°C) in August to a still warm 75.4°F (24.1°C). Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Harleysville, Pennsylvania, with an average temperature ranging between max 63.1°F (17.3°C) and min 47.3°F (8.5°C). Harleysville's October weather shows a moderate shift in high-temperatures, falling from September's moderately hot 75.4°F (24.1°C) to a refreshing 63.1°F (17.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Harleysville, Pennsylvania, with an average temperature varying between 36.5°F (2.5°C) and 50.9°F (10.5°C). The decrease of average high-temperatures is mild in November, with a decline from a comfortable 63.1°F (17.3°C) in October to a fresh 50.9°F (10.5°C). Weather in November »Weather in December
December, the first month of the winter in Harleysville, is also a wintry month, with an average temperature varying between 41.5°F (5.3°C) and 30.4°F (-0.9°C). December implies a gentle temperature shift, with average high-temperatures reducing from November's cool 50.9°F (10.5°C) to an icy 41.5°F (5.3°C). Weather in December »Updated: Jul 19, 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
Harleysville's coldest month, January, registers temperatures that range from a high of 35.2°F (1.8°C) to a low of 22.8°F (-5.1°C).
January is the month with the least rainfall. Rain falls for 5.7 days and accumulates 0.87" (22mm) of precipitation.
In Harleysville, during the entire year, the rain falls for 128.6 days and collects up to 15.16" (385mm) of precipitation.
January through May, November and December are months with snowfall.
In Harleysville, Pennsylvania, during the entire year, snow falls for 17 days and aggregates up to 5.43" (138mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
With an average relative humidity of 81%, February is the most humid month.
With an average of 4.6h of sunshine, February has the least sunshine of the year.
March is the month with the most snowfall. Snow falls for 3.8 days and accumulates 1.46" (37mm) of snow.
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.
April and July, with an average relative humidity of 75%, are the least humid months.
The months with the highest UV index in Harleysville are May through August, with an average maximum UV index of 6.
June through October are months without snowfall.
The month with the longest days is June, with an average of 15h and 0min of daylight.
Harleysville notes the warmest temperatures in July, with a average high of 84.6°F (29.2°C) and a low of 65.3°F (18.5°C).
July is the month with the most rainfall. Rain falls for 15.7 days and accumulates 1.97" (50mm) of precipitation.
July has the most sunshine of the year, with an average of 10.5h of sunshine.
The month with the shortest days in Harleysville is December, with an average of 9h and 24min of daylight.
Average temperature
Harleysville, PA
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.2°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Harleysville, 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
Harleysville, PA
- Average wind speed in January:
7.9mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8.1mph - Average wind speed in April:
8mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.9mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
7mph - Average wind speed in December:
7.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Harleysville, PA
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall
Harleysville, PA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.91" - Average rainfall in March:
1.18" - Average rainfall in April:
1.18" - Average rainfall in May:
1.38" - Average rainfall in June:
1.46"
- Average rainfall in July:
1.97" - Average rainfall in August:
1.81" - Average rainfall in September:
0.91" - Average rainfall in October:
1.14" - Average rainfall in November:
1.02" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is July (1.97").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Harleysville, PA
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
14 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
11 days - Average rainfall days in October:
10.2 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall
Harleysville, PA
- Average snowfall in January:
1.06" - Average snowfall in February:
1.14" - Average snowfall in March:
1.46" - Average snowfall in April:
0.12" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Harleysville, PA
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.3 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:
0.6 days - Average snowfall days in December:
2 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Harleysville, PA
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 January:
4h and 42min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Harleysville, PA
- Average sunshine days in January:
20.7 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
16.6 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
13.2 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
14 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
21.4 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (12.8 days).
Average UV index
Harleysville, PA
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Harleysville, PA
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Harleysville, PA
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
