Climate and monthly weather forecastHummelstown, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Hummelstown, Pennsylvania, with an average temperature varying between 34.2°F (1.2°C) and 21.9°F (-5.6°C). January is the coldest month of the year, registering average temperatures as high as 34.2°F (1.2°C) and as low as 21.9°F (-5.6°C). Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Hummelstown, Pennsylvania, with an average temperature ranging between max 37.9°F (3.3°C) and min 23.5°F (-4.7°C). The commencement of February notes an average high-temperature of a still icy 37.9°F (3.3°C), exhibiting little difference from the previous month. Weather in February »Weather in March
March, the first month of the spring in Hummelstown, is a chilly month, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 31.5°F (-0.3°C). March brings an increase in the average high-temperature, progressing from a wintry 37.9°F (3.3°C) in February to a chilly 46.9°F (8.3°C). Weather in March »Weather in April
April in Hummelstown, Pennsylvania, is a refreshing spring month, with an average temperature ranging between max 59.5°F (15.3°C) and min 41.5°F (5.3°C). The shift from March to April brings an increase in the average high-temperature, moving from a frosty 46.9°F (8.3°C) to a refreshing 59.5°F (15.3°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Hummelstown, Pennsylvania, with an average temperature varying between 51.3°F (10.7°C) and 69.8°F (21°C). Hummelstown in May experiences an increase in the average high-temperature, moving from April's mild 59.5°F (15.3°C) to a pleasant 69.8°F (21°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Hummelstown, Pennsylvania, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 77°F (25°C). Hummelstown experiences a minor temperature shift with the start of June, with average high-temperatures moving from an agreeable 69.8°F (21°C) in May to a warm 77°F (25°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Hummelstown, Pennsylvania, with an average temperature ranging between min 63.5°F (17.5°C) and max 82.4°F (28°C). July, having an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.5°F (17.5°C), is the warmest month. The heat index value for July is computed to be a tropical 89.6°F (32°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Hummelstown, Pennsylvania, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 80.2°F (26.8°C). The commencement of August notes an average high-temperature of a still warm 80.2°F (26.8°C), exhibiting little difference from the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Hummelstown, Pennsylvania, with an average temperature varying between 55.4°F (13°C) and 74.3°F (23.5°C). As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 80.2°F (26.8°C) to a still warm 74.3°F (23.5°C). Weather in September »Weather in October
October, like September, in Hummelstown, Pennsylvania, is another refreshing autumn month, with an average temperature varying between 45.9°F (7.7°C) and 61.9°F (16.6°C). Start of October brings a shift in the average high-temperature, falling from September's moderately hot 74.3°F (23.5°C) to a refreshing 61.9°F (16.6°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Hummelstown, Pennsylvania, with an average temperature fluctuating between 49.8°F (9.9°C) and 34.9°F (1.6°C). Hummelstown's transition into November involves a shift in temperature, receding from an enjoyable 61.9°F (16.6°C) in October to a chilly 49.8°F (9.9°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Hummelstown, Pennsylvania, with an average temperature ranging between max 41°F (5°C) and min 29.5°F (-1.4°C). Hummelstown's progression into December involves a minor drop in the average high-temperature, slightly receding from a chilly 49.8°F (9.9°C) in November to a cold 41°F (5°C). Weather in December »Updated: Aug 6, 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
With average temperatures fluctuating between a high of 34.2°F (1.2°C) and a low of 21.9°F (-5.6°C), January stands out as the coldest month.
In Hummelstown, during the entire year, the rain falls for 162.3 days and collects up to 30.71" (780mm) of precipitation.
January through April, October through December are months with snowfall.
January is the month with the most snowfall in Hummelstown. Snow falls for 9 days and accumulates 3.94" (100mm) of snow.
In Hummelstown, during the entire year, snow falls for 27.8 days and aggregates up to 13.23" (336mm) of snow.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February and May, with an average relative humidity of 81%.
The month with the least sunshine is February, with an average of 4.5h of sunshine.
The months with the lowest humidity are March and April, with an average relative humidity of 76%.
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.
May is the month with the most rainfall. Rain falls for 18.4 days and accumulates 3.15" (80mm) of precipitation.
May through September are months without snowfall.
May through July, with an average maximum UV index of 6, are months with the highest UV index.
With an average of 15h and 0min of daylight, June has the longest days of the year.
Hummelstown's July weather, with an average high temperature of 82.4°F (28°C) and an average low temperature of 63.5°F (17.5°C), tends to be the warmest of the year.
The month with the most sunshine is July, with an average of 10.5h of sunshine.
The month with the least rainfall is September, when the rain falls for 12 days and typically collects 2.05" (52mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Hummelstown, PA
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (34.2°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 (21.9°F).
Average pressure
Hummelstown, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"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:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Hummelstown, PA
- Average wind speed in January:
8.4mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Hummelstown, PA
The months with the highest relative humidity are February and May (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall
Hummelstown, PA
- Average rainfall in January:
2.24" - Average rainfall in February:
2.13" - Average rainfall in March:
2.4" - Average rainfall in April:
2.87" - Average rainfall in May:
3.15" - Average rainfall in June:
2.52"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.87" - Average rainfall in September:
2.05" - Average rainfall in October:
2.87" - Average rainfall in November:
2.28" - Average rainfall in December:
2.44"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days
Hummelstown, PA
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
9.7 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
17 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
12 days - Average rainfall days in October:
13.7 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
12 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).
Average snowfall
Hummelstown, PA
The month with the highest snowfall is January (3.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Hummelstown, PA
- Average snowfall days in January:
9 days - Average snowfall days in February:
6.6 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.4 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:
1.1 days - Average snowfall days in December:
5.2 days
The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Hummelstown, 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 30min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 36min
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 30min).
Average sunshine days
Hummelstown, PA
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10 days).
Average UV index
Hummelstown, PA
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
Hummelstown, PA
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Hummelstown, PA
The months with the highest visibility are January, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are February, May, September and October (5mi).
