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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, like December, is a freezing cold winter month in Saint Marys, Pennsylvania, with an average temperature fluctuating between 28.8°F (-1.8°C) and 16.3°F (-8.7°C). January tends to be the coldest month, with temperatures averaging a daily high of 28.8°F (-1.8°C) and a low of 16.3°F (-8.7°C). Weather in January »
Weather in February
February, the last month of the winter in Saint Marys, is an icy month, with an average temperature varying between 32.5°F (0.3°C) and 18.5°F (-7.5°C). In February, Saint Marys experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 28.8°F (-1.8°C) in January to a cold 32.5°F (0.3°C). Weather in February »
Weather in March
March, the first month of the spring in Saint Marys, is also an icy 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). The shift into March is characterized by a rise in the average high-temperature, transitioning from February's icy 32.5°F (0.3°C) to a still wintry 42.3°F (5.7°C). Weather in March »
Weather in April
April is a cool spring month in Saint Marys, Pennsylvania, with temperature in the range of an average low of 35.8°F (2.1°C) and an average high of 54.3°F (12.4°C). April sees a rise in the average high-temperature, climbing from a cold 42.3°F (5.7°C) in March to a cool 54.3°F (12.4°C). Weather in April »
Weather in May
May, the last month of the spring in Saint Marys, is a refreshing month, with temperature in the range of an average low of 46.8°F (8.2°C) and an average high of 66.9°F (19.4°C). Entering May, Saint Marys sees a temperature rise, with the average high-temperature advancing 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
June, the first month of the summer in Saint Marys, is a moderately hot month, with an average temperature ranging between min 53.2°F (11.8°C) and max 74.7°F (23.7°C). The beginning of June signals a minor rise in the average high-temperature, moving from an enjoyable 66.9°F (19.4°C) in May to a warm 74.7°F (23.7°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Saint Marys, Pennsylvania, with an average temperature ranging between max 79.3°F (26.3°C) and min 57.2°F (14°C). With average high and low temperatures of 79.3°F (26.3°C) and 57.2°F (14°C) respectively, July is Saint Marys's warmest month. Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Saint Marys, Pennsylvania, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 77.5°F (25.3°C). Stepping into August, Saint Marys records an average high-temperature of a still moderately hot 77.5°F (25.3°C), almost consistent with July. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Saint Marys, Pennsylvania, with temperature in the range of an average low of 50.5°F (10.3°C) and an average high of 70.3°F (21.3°C). The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 77.5°F (25.3°C) in August to a pleasant 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 ranging between max 57.4°F (14.1°C) and min 41.9°F (5.5°C). Saint Marys experiences a temperature shift at the start of October, with average high-temperatures adjusting from an agreeable 70.3°F (21.3°C) in September to a mild 57.4°F (14.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Saint Marys, Pennsylvania, with an average temperature varying between 31.1°F (-0.5°C) and 44.4°F (6.9°C). In Saint Marys, the beginning of November is marked by a lowered average high-temperature, shifting from October's refreshing 57.4°F (14.1°C) 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 an average temperature varying between 34.7°F (1.5°C) and 25°F (-3.9°C). Saint Marys's December weather shows a moderate shift in high-temperatures, falling from November's chilly 44.4°F (6.9°C) to an icy 34.7°F (1.5°C). Weather in December »
Updated: Jun 26, 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
What are the coldest months?
With its average high temperature of 28.8°F (-1.8°C) and a low of 16.3°F (-8.7°C), January is regarded as the coldest month.
What is the driest month?
January and November are months with the least rain when the rain falls for 5.3 days and typically aggregates up to 0.83" (21mm) of rain.
How many days does it rain?
In Saint Marys, during the entire year, the rain falls for 118.9 days and collects up to 13.31" (338mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
In Saint Marys, during the entire year, snow falls for 52.7 days and aggregates up to 16.14" (410mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year in Saint Marys, with an average of 2.5h of sunshine.
When is the lowest UV index in Saint Marys?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the most humid month?
The most humid month is February, with an average relative humidity of 89%.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 11 days and typically aggregates up to 4.21" (107mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Saint Marys, 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?
The month with the most rainfall is April, when the rain falls for 12.8 days and typically aggregates up to 1.5" (38mm) of precipitation.
What is the month with the highest UV index in Saint Marys?
The months with the highest UV index are May through August, with an average maximum UV index of 5.
What is the least humid month in Saint Marys?
June and July, with an average relative humidity of 78%, are the least humid months.
When it does not snow?
June through September are months without snowfall.
When are the longest days in Saint Marys?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What month is the hottest?
July stands out as Saint Marys's warmest month, with temperatures ranging between an average high of 79.3°F (26.3°C) and a low of 57.2°F (14°C).
What is the month with the most sunshine?
July and August, with an average of 9.5h of sunshine, are months with the most sunshine.
What is the month with the shortest days?
The month with the shortest days is December, 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 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 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - 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 1min
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 3min - Average sunshine in February:
2h and 5min - Average sunshine in March:
5h and 1min - Average sunshine in April:
6h and 4min - Average sunshine in May:
8h and 0min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
9h and 3min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 0min - Average sunshine in October:
4h and 3min - Average sunshine in November:
4h and 1min - Average sunshine in December:
2h and 4min
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).
Saint Marys, Pennsylvania, USA
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