Climate and monthly weather forecastSaint Marys, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, in Saint Marys, Pennsylvania, is a freezing cold winter month, with an average temperature ranging between min 16.3°F (-8.7°C) and max 28.8°F (-1.8°C). Temperature readings reach their annual highs in January, averaging 28.8°F (-1.8°C) and a minimum average of 16.3°F (-8.7°C). Weather in January »Weather in February
The last month of the winter, February, is an icy month in Saint Marys, Pennsylvania, with an average temperature fluctuating between 32.5°F (0.3°C) and 18.5°F (-7.5°C). The introduction of February notes a subtle temperature variation to an icy 32.5°F (0.3°C) from January's 28.8°F (-1.8°C). Weather in February »Weather in March
March, the first month of the spring in Saint Marys, is also a wintry month, with temperature in the range of an average low of 26.1°F (-3.3°C) and an average high of 42.3°F (5.7°C). As Saint Marys enters March, the average high-temperature increases from the an icy 32.5°F (0.3°C) of February to a still cold 42.3°F (5.7°C). Weather in March »Weather in April
April in Saint Marys, Pennsylvania, is a cool spring month, with an average temperature ranging between min 35.8°F (2.1°C) and max 54.3°F (12.4°C). April's arrival signals a temperature shift, moving from an icy 42.3°F (5.7°C) in March to a fresh 54.3°F (12.4°C). Weather in April »Weather in May
May, the last month of the spring in Saint Marys, is a comfortable month, with an average temperature ranging between min 46.8°F (8.2°C) and max 66.9°F (19.4°C). With the onset of May, the average high-temperature slightly shifts from April's fresh 54.3°F (12.4°C) to a comfortable 66.9°F (19.4°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Saint Marys, Pennsylvania, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 74.7°F (23.7°C). With the onset of June, Saint Marys observes a minor temperature ascent, with the average high-temperature adjusting from May's comfortable 66.9°F (19.4°C) to a warm 74.7°F (23.7°C). Weather in June »Weather in July
July, like June, in Saint Marys, Pennsylvania, is another warm summer month, with an average temperature fluctuating between 79.3°F (26.3°C) and 57.2°F (14°C). In Saint Marys, July records the highest average temperatures, peaking at 79.3°F (26.3°C) and reaching a low of 57.2°F (14°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Saint Marys, Pennsylvania, with an average temperature ranging between min 55.4°F (13°C) and max 77.5°F (25.3°C). Saint Marys starts August with an average high-temperature of a still warm 77.5°F (25.3°C), a minor shift from July's 79.3°F (26.3°C). Weather in August »Weather in September
September, the first month of the autumn in Saint Marys, is still a pleasant month, with an average temperature varying between 70.3°F (21.3°C) and 50.5°F (10.3°C). September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a moderately hot 77.5°F (25.3°C) in August to an agreeable 70.3°F (21.3°C). Weather in September »Weather in October
October, the same as September, in Saint Marys, Pennsylvania, is another mild autumn month, with an average temperature varying between 41.9°F (5.5°C) and 57.4°F (14.1°C). The average high-temperature decreases in October, shifting from a pleasant 70.3°F (21.3°C) in September to a moderate 57.4°F (14.1°C). Weather in October »Weather in November
November, the last month of the autumn in Saint Marys, is also a frosty month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 44.4°F (6.9°C). Saint Marys in November experiences a subtle temperature decline, with average high-temperatures reducing from a mild 57.4°F (14.1°C) in October to a frosty 44.4°F (6.9°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Saint Marys, Pennsylvania, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 25°F (-3.9°C). In December, the average high-temperature decreases from a frosty 44.4°F (6.9°C) in November to a wintry 34.7°F (1.5°C). Weather in December »Updated: Aug 17, 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
January, noted for its average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 16.3°F (-8.7°C), is considered the coldest month in Saint Marys, Pennsylvania.
The months with the least rainfall in Saint Marys are January and November Rain falls for 5.3 days and accumulates 0.83" (21mm) of rain.
Throughout the year, there are 118.9 rainfall days, and 13.31" (338mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
In Saint Marys, during the entire year, snow falls for 52.7 days and aggregates up to 16.14" (410mm) of snow.
With an average of 2.5h of sunshine, January has the least sunshine of the year.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Saint Marys.
February is the most humid month, with an average relative humidity of 89%.
February is the month with the most snowfall. Snow falls for 11 days and accumulates 4.21" (107mm) 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 is the month with the most rainfall in Saint Marys. Rain falls for 12.8 days and accumulates 1.5" (38mm) of precipitation.
May through August, with an average maximum UV index of 5, are months with the highest UV index.
June and July, with an average relative humidity of 78%, are the least humid months.
June through September are months without snowfall.
June has the longest days of the year, with an average of 15h and 6min of daylight.
July is the month when Saint Marys experiences its warmest temperatures, averaging a high of 79.3°F (26.3°C) and a low of 57.2°F (14°C).
July and August, with an average of 9.5h of sunshine, are months with the most sunshine.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Saint Marys, PA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure
Saint Marys, 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:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"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:
30.12"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
Saint Marys, PA
- Average wind speed in January:
8.9mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.2mph - Average wind speed in April:
8.3mph - Average wind speed in May:
7mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.7mph - Average wind speed in December:
8.3mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Saint Marys, PA
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are June and July (78%).
Average rainfall
Saint Marys, PA
- Average rainfall in January:
0.83" - Average rainfall in February:
1.14" - Average rainfall in March:
1.06" - Average rainfall in April:
1.5" - Average rainfall in May:
1.42" - Average rainfall in June:
1.18"
- Average rainfall in July:
1.14" - Average rainfall in August:
0.87" - Average rainfall in September:
1.02" - Average rainfall in October:
1.26" - Average rainfall in November:
0.83" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is April (1.5").
The driest months (with the least rainfall) are January and November (0.83").
Average rainfall days
Saint Marys, PA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
9.2 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
15.7 days - Average rainfall days in June:
12.7 days
- Average rainfall days in July:
13.7 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Saint Marys, PA
- Average snowfall in January:
2.91" - Average snowfall in February:
4.21" - Average snowfall in March:
1.81" - Average snowfall in April:
0.98" - Average snowfall in May:
0.75" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint Marys, PA
- Average snowfall days in January:
12.2 days - Average snowfall days in February:
11 days - Average snowfall days in March:
7.6 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
0.5 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:
1.5 days - Average snowfall days in November:
6.4 days - Average snowfall days in December:
10.2 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Marys, PA
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
2h and 30min - Average sunshine in February:
2h and 48min - Average sunshine in March:
5h and 6min - Average sunshine in April:
6h and 42min - Average sunshine in May:
8h and 0min - Average sunshine in June:
8h and 54min
- Average sunshine in July:
9h and 30min - Average sunshine in August:
9h and 30min - Average sunshine in September:
8h and 0min - Average sunshine in October:
4h and 30min - Average sunshine in November:
4h and 12min - Average sunshine in December:
2h and 36min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days
Saint Marys, PA
- Average sunshine days in January:
17.6 days - Average sunshine days in February:
15.7 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
14 days - Average sunshine days in May:
13 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (13 days).
Average UV index
Saint Marys, PA
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Saint Marys, PA
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility
Saint Marys, PA
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (5mi).
The months with the lowest visibility are August and September (4mi).
