Climate and monthly weather forecastSaint Marys, WV
Climate and monthly weather forecast
Weather in January
January, like December, in Saint Marys, West Virginia, is an icy winter month, with an average temperature fluctuating between 36.1°F (2.3°C) and 23.2°F (-4.9°C). January, on average, is the coldest month, registering a high temperature of 36.1°F (2.3°C) and a low of 23.2°F (-4.9°C). Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Saint Marys, West Virginia, with an average temperature varying between 26.6°F (-3°C) and 40.6°F (4.8°C). February's arrival brings an average high-temperature of a still wintry 40.6°F (4.8°C), demonstrating subtle variation from the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a cool month in Saint Marys, West Virginia, with an average temperature ranging between min 34.2°F (1.2°C) and max 51.3°F (10.7°C). The average high-temperature increases in March, moving from an icy 40.6°F (4.8°C) in February to a fresh 51.3°F (10.7°C). Weather in March »Weather in April
April in Saint Marys, West Virginia, is a comfortable spring month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 43.7°F (6.5°C). Saint Marys's weather in April presents a rise in the average high-temperature, moving from a cool 51.3°F (10.7°C) in March to an enjoyable 63.5°F (17.5°C). Weather in April »Weather in May
May, the last month of the spring in Saint Marys, is a moderately hot month, with an average temperature varying between 74.1°F (23.4°C) and 53.4°F (11.9°C). May's onset brings a rise in the average high-temperature, moving from an enjoyable 63.5°F (17.5°C) in April to a warm 74.1°F (23.4°C). Weather in May »Weather in June
June, the first month of the summer in Saint Marys, is still a warm month, with temperature in the range of an average low of 59.9°F (15.5°C) and an average high of 81.3°F (27.4°C). June marks a minor ascent in the average high-temperature, adjusting from May's 74.1°F (23.4°C) to a still moderately hot 81.3°F (27.4°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Saint Marys, West Virginia, with an average temperature varying between 85.5°F (29.7°C) and 63.1°F (17.3°C). Saint Marys records the warmest temperatures in July, averaging a high of 85.5°F (29.7°C) and a low of 63.1°F (17.3°C). Throughout July, the heat index is computed to be a torrid 96.8°F (36°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Saint Marys, West Virginia, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 61.3°F (16.3°C). The commencement of August notes an average high-temperature of a still warm 83.8°F (28.8°C), exhibiting little difference from the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Saint Marys, West Virginia, with an average temperature fluctuating between 56.7°F (13.7°C) and 77.9°F (25.5°C). A modest decline in the average high-temperature is seen during September, decreasing from a warm 83.8°F (28.8°C) in August to a still moderately hot 77.9°F (25.5°C). Weather in September »Weather in October
October, like September, in Saint Marys, West Virginia, is another comfortable autumn month, with an average temperature fluctuating between 46°F (7.8°C) and 64.4°F (18°C). The onset of October introduces a moderate change in Saint Marys's weather, with average high-temperatures falling from September's moderately hot 77.9°F (25.5°C) to a comfortable 64.4°F (18°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Saint Marys, West Virginia, with temperature in the range of an average high of 51.1°F (10.6°C) and an average low of 35.8°F (2.1°C). The beginning of November marks a decrease in the average high-temperature, transitioning from an enjoyable 64.4°F (18°C) in October to a cool 51.1°F (10.6°C). Weather in November »Weather in December
December, the first month of the winter in Saint Marys, is still a cold month, with temperature in the range of an average high of 41.9°F (5.5°C) and an average low of 30.6°F (-0.8°C). A moderate decline in the average high-temperature is seen during December, decreasing from a cool 51.1°F (10.6°C) in November to a wintry 41.9°F (5.5°C). Weather in December »Updated: Feb 14, 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
The month of January sees the average lowest temperatures in Saint Marys, West Virginia, reaching 36.1°F (2.3°C) at the peak and 23.2°F (-4.9°C) at the low.
January is the most humid month, with an average relative humidity of 83%.
Throughout the year, in Saint Marys, there are 177.1 rainfall days, and 33.39" (848mm) of precipitation is accumulated.
January through April, October through December are months with snowfall in Saint Marys, West Virginia.
In Saint Marys, West Virginia, during the entire year, snow falls for 47.1 days and aggregates up to 17.99" (457mm) of snow.
The month with the least sunshine is January, with an average of 3.4h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall in Saint Marys, West Virginia, is February, when snow falls for 11.3 days and typically aggregates up to 4.84" (123mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Saint Marys, West Virginia, 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.
The month with the most rainfall is May, when the rain falls for 20 days and typically aggregates up to 3.82" (97mm) of precipitation.
May through September are months without snowfall in Saint Marys.
With an average of 14h and 54min of daylight, June has the longest days of the year in Saint Marys, West Virginia.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
Saint Marys records the warmest temperatures in July, averaging a high of 85.5°F (29.7°C) and a low of 63.1°F (17.3°C).
July and August, with an average relative humidity of 76%, are the least humid months in Saint Marys.
With an average of 10.2h of sunshine, August has the most sunshine of the year.
The month with the least rainfall in Saint Marys is September, when the rain falls for 13.9 days and typically collects 2.05" (52mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Saint Marys, WV
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.1°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 (23.2°F).
Average pressure
Saint Marys, WV
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed
Saint Marys, WV
- Average wind speed in January:
6.7mph - Average wind speed in February:
6.8mph - Average wind speed in March:
6.4mph - Average wind speed in April:
6.6mph - Average wind speed in May:
5.5mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.2mph - Average wind speed in September:
4.7mph - Average wind speed in October:
5.4mph - Average wind speed in November:
5.7mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity
Saint Marys, WV
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall
Saint Marys, WV
- Average rainfall in January:
2.4" - Average rainfall in February:
2.83" - Average rainfall in March:
3.03" - Average rainfall in April:
3.39" - Average rainfall in May:
3.82" - Average rainfall in June:
2.87"
- Average rainfall in July:
2.99" - Average rainfall in August:
2.28" - Average rainfall in September:
2.05" - Average rainfall in October:
2.36" - Average rainfall in November:
2.24" - Average rainfall in December:
3.11"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days
Saint Marys, WV
- Average rainfall days in January:
11.8 days - Average rainfall days in February:
11.3 days - Average rainfall days in March:
15.5 days - Average rainfall days in April:
16.9 days - Average rainfall days in May:
20 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
15.4 days - Average rainfall days in September:
13.9 days - Average rainfall days in October:
13.9 days - Average rainfall days in November:
10.7 days - Average rainfall days in December:
12.5 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is November (10.7 days).
Average snowfall
Saint Marys, WV
The month with the highest snowfall is February (4.84").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Saint Marys, WV
- Average snowfall days in January:
14 days - Average snowfall days in February:
11.3 days - Average snowfall days in March:
7.1 days - Average snowfall days in April:
1.5 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:
0.4 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
10 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Marys, WV
- Average daylight in January:
9h and 48min - 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:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 48min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 30min - Average sunshine in December:
3h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Saint Marys, WV
- Average sunshine days in January:
9.3 days - Average sunshine days in February:
8.9 days - Average sunshine days in March:
10.8 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
13.1 days - Average sunshine days in October:
15.3 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
11.4 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (8.5 days).
Average UV index
Saint Marys, WV
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Saint Marys, WV
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Saint Marys, WV
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
