Climate and monthly weather forecastDuncannon, PA
Climate and monthly weather forecast
Weather in January
January, like December, in Duncannon, Pennsylvania, is another cold winter month, with an average temperature varying between 21.6°F (-5.8°C) and 34°F (1.1°C). In Duncannon, the month of January registers the lowest temperatures, averaging 34°F (1.1°C) at the peak and 21.6°F (-5.8°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in Duncannon, is also an icy month, with an average temperature varying between 23.4°F (-4.8°C) and 37.9°F (3.3°C). February brings a marginal elevation to a still wintry 37.9°F (3.3°C) from January's 34°F (1.1°C) in Duncannon's average high-temperatures. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Duncannon, Pennsylvania, with an average temperature varying between 47.5°F (8.6°C) and 31.3°F (-0.4°C). Duncannon's transition into March is marked by a temperature shift, moving from an icy 37.9°F (3.3°C) in February to a chilly 47.5°F (8.6°C). Weather in March »Weather in April
April in Duncannon, Pennsylvania, is a refreshing spring month, with an average temperature ranging between min 41.2°F (5.1°C) and max 59.7°F (15.4°C). April indicates a change in the average high-temperature, moving up from a frosty 47.5°F (8.6°C) in March to a mild 59.7°F (15.4°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Duncannon, Pennsylvania, with an average temperature ranging between max 70.2°F (21.2°C) and min 50.9°F (10.5°C). Observing a rise in May, the average high-temperature goes from April's refreshing 59.7°F (15.4°C) to a pleasant 70.2°F (21.2°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Duncannon, Pennsylvania, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 78.3°F (25.7°C). Duncannon's weather in June presents a minor rise in the average high-temperature, moving from a pleasant 70.2°F (21.2°C) in May to a warm 78.3°F (25.7°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Duncannon, Pennsylvania, with an average temperature ranging between max 83.7°F (28.7°C) and min 63.1°F (17.3°C). In Duncannon, temperatures reach their average annual highs in July, measuring 83.7°F (28.7°C) and a minimum average of 63.1°F (17.3°C). The average heat index in July is evaluated at a tropical 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Duncannon, is also a moderately hot month, with an average temperature fluctuating between 60.6°F (15.9°C) and 81.5°F (27.5°C). Duncannon, Pennsylvania, experiences an average high-temperature of a still moderately hot 81.5°F (27.5°C) with the onset of August, subtly varied from July's 83.7°F (28.7°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Duncannon, Pennsylvania, with an average temperature fluctuating between 74.3°F (23.5°C) and 54.9°F (12.7°C). As Duncannon enters September, the average high-temperature subtly lowers from the a moderately hot 81.5°F (27.5°C) of August to a still warm 74.3°F (23.5°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Duncannon, Pennsylvania, with an average temperature fluctuating between 62.4°F (16.9°C) and 45.5°F (7.5°C). As October commences, the average high-temperature shows a reduction, transitioning from a moderately hot 74.3°F (23.5°C) in September to a refreshing 62.4°F (16.9°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Duncannon, Pennsylvania, with an average temperature ranging between min 34.7°F (1.5°C) and max 49.8°F (9.9°C). In November, the average high-temperature goes from a refreshing 62.4°F (16.9°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 also a wintry month in Duncannon, Pennsylvania, with an average temperature ranging between max 40.3°F (4.6°C) and min 28.8°F (-1.8°C). With December's arrival, Duncannon sees a decrease in average high-temperatures, moving from a chilly 49.8°F (9.9°C) in November to a wintry 40.3°F (4.6°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
In Duncannon, the lowest temperatures are generally noted in January, averaging a high of 34°F (1.1°C) and a low of 21.6°F (-5.8°C).
The month with the least rainfall is January, when the rain falls for 8.8 days and typically collects 2.13" (54mm) of precipitation.
In Duncannon, during the entire year, the rain falls for 161.8 days and collects up to 30.71" (780mm) of precipitation.
Months with snowfall are January through May, October through December.
The month with the most snowfall is January, when snow falls for 8.9 days and typically aggregates up to 4.57" (116mm) of snow.
Throughout the year, in Duncannon, there are 28.8 snowfall days, and 15.67" (398mm) of snow is accumulated.
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 80%, February is the most humid month.
February has the least sunshine of the year, with an average of 4.3h of sunshine.
The months with the lowest humidity are March and April, with an average relative humidity of 75%.
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 18.3 days and accumulates 3.15" (80mm) of precipitation.
The months with the highest UV index are May through July, with an average maximum UV index of 6.
In Duncannon, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 0min of daylight.
July, with average temperatures reaching a high of 83.7°F (28.7°C) and a low of 63.1°F (17.3°C), is the warmest month.
With an average of 10.3h of sunshine, July has the most sunshine of the year.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Duncannon, PA
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (34°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Duncannon, 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:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"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 (29.95"Hg).
Average wind speed
Duncannon, PA
- Average wind speed in January:
7.7mph - Average wind speed in February:
7.7mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.9mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.5mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.4mph - Average wind speed in November:
6.7mph - Average wind speed in December:
7.2mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity
Duncannon, PA
The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are March and April (75%).
Average rainfall
Duncannon, PA
- Average rainfall in January:
2.13" - Average rainfall in February:
2.2" - Average rainfall in March:
2.28" - Average rainfall in April:
2.8" - Average rainfall in May:
3.15" - Average rainfall in June:
2.6"
- Average rainfall in July:
3.11" - Average rainfall in August:
2.95" - Average rainfall in September:
2.28" - Average rainfall in October:
2.68" - Average rainfall in November:
2.24" - Average rainfall in December:
2.28"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days
Duncannon, PA
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
17.1 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
18 days - Average rainfall days in August:
16.2 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
13.5 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
11 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (8.8 days).
Average snowfall
Duncannon, PA
- Average snowfall in January:
4.57" - Average snowfall in February:
3.58" - Average snowfall in March:
4.29" - Average snowfall in April:
0.28" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Duncannon, PA
- Average snowfall days in January:
8.9 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
0.6 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:
5.5 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Duncannon, 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 18min
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 24min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days
Duncannon, PA
- Average sunshine days in January:
15.6 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
12.9 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
16 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
Duncannon, 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
Duncannon, PA
The months with the most cloud cover are February and December (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Duncannon, PA
The months with the highest visibility are March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are January, February, May and September (5mi).
