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 Saint Clair, Pennsylvania, is a wintry winter month, with an average temperature varying between 20.5°F (-6.4°C) and 32.5°F (0.3°C). January is the coldest month, with an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.5°F (-6.4°C). Weather in January »
Weather in February
February, the last month of the winter in Saint Clair, is another cold month, with temperature in the range of an average high of 36.1°F (2.3°C) and an average low of 22.3°F (-5.4°C). In February, the average high-temperature is almost the same as in January - a still wintry 36.1°F (2.3°C). Weather in February »
Weather in March
March, the first month of the spring in Saint Clair, is a frosty month, with an average temperature fluctuating between 29.3°F (-1.5°C) and 45.3°F (7.4°C). In March, the average high-temperature rises from a wintry 36.1°F (2.3°C) in February to a chilly 45.3°F (7.4°C). Weather in March »
Weather in April
April is a moderate spring month in Saint Clair, Pennsylvania, with an average temperature fluctuating between 57.4°F (14.1°C) and 39.7°F (4.3°C). In Saint Clair, Pennsylvania, the average high-temperature in April increases from a frosty 45.3°F (7.4°C) in March to a mild 57.4°F (14.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Saint Clair, Pennsylvania, with temperature in the range of an average high of 68.4°F (20.2°C) and an average low of 49.6°F (9.8°C). In Saint Clair, Pennsylvania, the average high-temperature in May increases from a moderate 57.4°F (14.1°C) in April to a pleasant 68.4°F (20.2°C). Weather in May »
Weather in June
June, the first month of the summer in Saint Clair, is a moderately hot month, with an average temperature varying between 75.7°F (24.3°C) and 56.8°F (13.8°C). In June, the average high-temperature slightly increases from a pleasant 68.4°F (20.2°C) in May to a warm 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Saint Clair, Pennsylvania, with an average temperature varying between 81.5°F (27.5°C) and 61.3°F (16.3°C). The warmest month is July, with an average high-temperature of 81.5°F (27.5°C) and an average low-temperature of 61.3°F (16.3°C). The average heat index in July is evaluated at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Saint Clair, Pennsylvania, with an average temperature fluctuating between 59.5°F (15.3°C) and 79°F (26.1°C). In Saint Clair, the average high-temperature in August is essentially the same as in July - a still warm 79°F (26.1°C). Weather in August »
Weather in September
September, the first month of the autumn in Saint Clair, is also an agreeable month, with an average temperature varying between 73°F (22.8°C) and 53.6°F (12°C). In September, the average high-temperature marginally drops from a warm 79°F (26.1°C) in August to a pleasant 73°F (22.8°C). Weather in September »
Weather in October
October, like September, in Saint Clair, Pennsylvania, is another enjoyable autumn month, with an average temperature varying between 60.8°F (16°C) and 44.6°F (7°C). In October, the average high-temperature drops from an agreeable 73°F (22.8°C) in September to an enjoyable 60.8°F (16°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Saint Clair, Pennsylvania, with an average temperature ranging between max 48°F (8.9°C) and min 33.8°F (1°C). In Saint Clair, the average high-temperature in November drops from a comfortable 60.8°F (16°C) in October to a chilly 48°F (8.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Saint Clair, Pennsylvania, with an average temperature varying between 27.7°F (-2.4°C) and 38.8°F (3.8°C). In December, the average high-temperature decreases from a frosty 48°F (8.9°C) in November to a wintry 38.8°F (3.8°C). Weather in December »
[Resources]FAQ
What is the coldest month in Saint Clair?
With an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.5°F (-6.4°C), January is the coldest month in Saint Clair, Pennsylvania.
How much does it rain in Saint Clair?
Throughout the year, there are 172.9 rainfall days, and 34.21" (869mm) of precipitation is accumulated.
When does it snow in Saint Clair?
Months with snowfall in Saint Clair are January through May, October through December.
What is the snowiest month in Saint Clair?
January is the month with the most snowfall in Saint Clair, Pennsylvania. Snow falls for 11.8 days and accumulates 5.47" (139mm) of snow.
How much does it snow in Saint Clair?
Throughout the year, there are 39.7 snowfall days, and 20.47" (520mm) of snow is accumulated.
What is the month with the least sunshine in Saint Clair?
January, February and December, with an average of 4.4h of sunshine, are months with the least sunshine in Saint Clair, Pennsylvania.
When is the lowest UV index in Saint Clair?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Clair, Pennsylvania.
What is the most humid month in Saint Clair?
The most humid month in Saint Clair, Pennsylvania, is February, with an average relative humidity of 83%.
When is Daylight Saving Time (DST) in Saint Clair?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Saint Clair, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in Saint Clair?
The least humid month is April, with an average relative humidity of 77%.
What is the wettest month in Saint Clair?
May is the month with the most rainfall. Rain falls for 18.7 days and accumulates 3.39" (86mm) of precipitation.
When it does not snow in Saint Clair?
June through September are months without snowfall in Saint Clair.
When are the longest days in Saint Clair?
With an average of 15h and 3min of daylight, June has the longest days of the year.
What is the warmest month in Saint Clair?
The warmest month is July, with an average high-temperature of 81.5°F (27.5°C) and an average low-temperature of 61.3°F (16.3°C).
What month has the most sunshine in Saint Clair?
The month with the most sunshine is July, with an average of 10.5h of sunshine.
When is the highest UV index in Saint Clair?
July is the month with the highest UV index in Saint Clair, with an average maximum UV index of 6.
What is the driest month in Saint Clair?
September is the month with the least rainfall. Rain falls for 12.7 days and accumulates 2.09" (53mm) of precipitation.
What is the month with the shortest days in Saint Clair?
With an average of 9h and 19min of daylight, December has the shortest days of the year in Saint Clair.
Average temperature
Saint Clair, PA
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Saint Clair, PA
- Average pressure in January:
30.09"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:
30.03"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
Saint Clair, PA
- Average wind speed in January:
8.1mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.4mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.9mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.2mph - Average wind speed in December:
7.7mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Saint Clair, PA
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall
Saint Clair, PA
- Average rainfall in January:
2.68" - Average rainfall in February:
2.6" - Average rainfall in March:
2.76" - Average rainfall in April:
3.15" - Average rainfall in May:
3.39" - Average rainfall in June:
2.76"
- Average rainfall in July:
3.19" - Average rainfall in August:
3.07" - Average rainfall in September:
2.09" - Average rainfall in October:
2.95" - Average rainfall in November:
2.72" - Average rainfall in December:
2.87"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days
Saint Clair, PA
- Average rainfall days in January:
10.8 days - Average rainfall days in February:
10.9 days - Average rainfall days in March:
14.2 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
18.7 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
16.2 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
13.9 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
13.5 days
The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and November (10.8 days).
Average snowfall
Saint Clair, PA
- Average snowfall in January:
5.47" - Average snowfall in February:
4.84" - Average snowfall in March:
4.96" - Average snowfall in April:
0.24" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is January (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint Clair, PA
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
10.4 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.2 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:
0.2 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
6.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Clair, 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 5min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - 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 2min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 24min).
Average sunshine days
Saint Clair, PA
- Average sunshine days in January:
13.3 days - Average sunshine days in February:
10.6 days - Average sunshine days in March:
11.9 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
9.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
12.2 days - Average sunshine days in September:
14.9 days - Average sunshine days in October:
13.7 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
14.2 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is May (9.6 days).
Average UV index
Saint Clair, PA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Saint Clair, PA
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Saint Clair, PA
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
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