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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, the same as December, is an icy winter month in Castle Shannon, Pennsylvania, with an average temperature ranging between min 20.8°F (-6.2°C) and max 33.4°F (0.8°C). Castle Shannon notes the coldest temperatures in January, with a high average of 33.4°F (0.8°C) and a low of 20.8°F (-6.2°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Castle Shannon, Pennsylvania, with an average temperature fluctuating between 37.8°F (3.2°C) and 23.4°F (-4.8°C). Castle Shannon notes an average high-temperature of a still wintry 37.8°F (3.2°C) in February, displaying minor variation from January. Weather in February »
Weather in March
March, the first month of the spring in Castle Shannon, is a chilly month, with an average temperature varying between 47.8°F (8.8°C) and 31.5°F (-0.3°C). March marks a rise in the average high-temperature, moving from February's wintry 37.8°F (3.2°C) to a frosty 47.8°F (8.8°C). Weather in March »
Weather in April
April in Castle Shannon, Pennsylvania, is a refreshing spring month, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 60.6°F (15.9°C). April brings a rise in the average high-temperature, transitioning from March's chilly 47.8°F (8.8°C) to a mild 60.6°F (15.9°C). Weather in April »
Weather in May
May, the last month of the spring in Castle Shannon, is an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 51.4°F (10.8°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a refreshing 60.6°F (15.9°C) in April to a pleasant 72.3°F (22.4°C). Weather in May »
Weather in June
June, the first month of the summer in Castle Shannon, is a moderately hot month, with an average temperature fluctuating between 58.6°F (14.8°C) and 79.3°F (26.3°C). A minor escalation in the average high-temperature is seen with the onset of June, moving from a pleasant 72.3°F (22.4°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Castle Shannon, Pennsylvania, with an average temperature ranging between min 63°F (17.2°C) and max 83.8°F (28.8°C). July, characterized by an average high temperature of 83.8°F (28.8°C) and a low temperature of 63°F (17.2°C), is generally the warmest month. In July, the average heat index is evaluated 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 Castle Shannon, Pennsylvania, with an average temperature fluctuating between 82.2°F (27.9°C) and 61.2°F (16.2°C). Castle Shannon, Pennsylvania, notes an average high-temperature of a still moderately hot 82.2°F (27.9°C) in August, hardly diverging from July. Weather in August »
Weather in September
September, the first month of the autumn in Castle Shannon, is also a moderately hot month, with an average temperature varying between 75.7°F (24.3°C) and 55.9°F (13.3°C). The average high-temperature slightly decreases in September, shifting from 82.2°F (27.9°C) in August to a still moderately hot 75.7°F (24.3°C). Weather in September »
Weather in October
October, like September, in Castle Shannon, Pennsylvania, is another enjoyable autumn month, with an average temperature varying between 45.5°F (7.5°C) and 62.1°F (16.7°C). The onset of October comes with a shift in the average high-temperature, falling from a warm 75.7°F (24.3°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 also a frosty month in Castle Shannon, Pennsylvania, with an average temperature fluctuating between 34.3°F (1.3°C) and 49.3°F (9.6°C). November's arrival corresponds with a decrease in average high-temperatures, from October's enjoyable 62.1°F (16.7°C) to a chilly 49.3°F (9.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Castle Shannon, Pennsylvania, with temperature in the range of an average high of 39.7°F (4.3°C) and an average low of 28.2°F (-2.1°C). The arrival of December corresponds with a reduction in the average high-temperature, down from November's chilly 49.3°F (9.6°C) to a cold 39.7°F (4.3°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Castle Shannon?
January is Castle Shannon's coldest month, registering average high temperatures of 33.4°F (0.8°C) and lows of 20.8°F (-6.2°C).
What is the most humid month in Castle Shannon?
The months with the highest humidity are January and February, with an average relative humidity of 84%.
How many days does it rain in Castle Shannon?
Throughout the year, in Castle Shannon, there are 164 rainfall days, and 26.89" (683mm) of precipitation is accumulated.
When does it snow in Castle Shannon?
January through April, October through December are months with snowfall in Castle Shannon.
When does it snow the most in Castle Shannon?
January is the month with the most snowfall. Snow falls for 16.3 days and accumulates 3.46" (88mm) of snow.
How many days does it snow in Castle Shannon?
In Castle Shannon, during the entire year, snow falls for 53.3 days and aggregates up to 13.27" (337mm) of snow.
What is the month with the least sunshine in Castle Shannon?
The month with the least sunshine in Castle Shannon is January, with an average of 2.9h of sunshine.
When is Daylight Saving Time (DST) in Castle Shannon?
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 rainiest month in Castle Shannon?
May is the month with the most rainfall in Castle Shannon, Pennsylvania. Rain falls for 18.4 days and accumulates 3.07" (78mm) of precipitation.
When it does not snow in Castle Shannon?
In Castle Shannon, snow does not fall in May through September.
When are the longest days in Castle Shannon?
June has the longest days of the year, with an average of 15h and 0min of daylight.
When is the highest UV index in Castle Shannon?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest in Castle Shannon?
July is the warmest month of the year in Castle Shannon, Pennsylvania, registering average temperatures as high as 83.8°F (28.8°C) and as low as 63°F (17.2°C).
What is the least humid month in Castle Shannon?
August is the least humid month, with an average relative humidity of 73%.
What month has the most sunshine in Castle Shannon?
August has the most sunshine of the year in Castle Shannon, Pennsylvania, with an average of 10.1h of sunshine.
What is the driest month in Castle Shannon?
The month with the least rainfall in Castle Shannon, Pennsylvania, is November, when the rain falls for 10 days and typically collects 1.61" (41mm) of precipitation.
What is the month with the shortest days in Castle Shannon?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
When is the lowest UV index in Castle Shannon?
With an average maximum UV index of 1, December is the month with the lowest UV index in Castle Shannon.
Average temperature
Castle Shannon, 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 (33.4°F).
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure
Castle Shannon, PA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.11"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
Castle Shannon, PA
- Average wind speed in January:
7.9mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.4mph - Average wind speed in May:
6mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity
Castle Shannon, PA
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (73%).
Average rainfall
Castle Shannon, PA
- Average rainfall in January:
1.65" - Average rainfall in February:
1.85" - Average rainfall in March:
1.97" - Average rainfall in April:
2.8" - Average rainfall in May:
3.07" - Average rainfall in June:
2.76"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days
Castle Shannon, PA
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
8.9 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
16.6 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10 days - Average rainfall days in December:
10.7 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
Castle Shannon, PA
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Castle Shannon, PA
- Average snowfall days in January:
16.3 days - Average snowfall days in February:
11.9 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0 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:
0.3 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
11.8 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Castle Shannon, 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 2min - 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:
10h and 0min - 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 24min).
- Average sunshine in January:
2h and 5min - Average sunshine in February:
3h and 3min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
5h and 1min - Average sunshine in November:
4h and 4min - Average sunshine in December:
3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days
Castle Shannon, PA
- Average sunshine days in January:
9.7 days - Average sunshine days in February:
9.5 days - Average sunshine days in March:
11.9 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
13 days - Average sunshine days in September:
14 days - Average sunshine days in October:
14.4 days - Average sunshine days in November:
16.4 days - Average sunshine days in December:
11 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (9.5 days).
Average UV index
Castle Shannon, PA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Castle Shannon, PA
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Castle Shannon, PA
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Castle Shannon, Pennsylvania, USA
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