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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 another cold winter month in Saint Mary, Missouri, with temperature in the range of an average high of 39.6°F (4.2°C) and an average low of 25.7°F (-3.5°C). Saint Mary's January weather reaches an average high of 39.6°F (4.2°C) and an average low of 25.7°F (-3.5°C), making it the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Saint Mary, Missouri, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 43.7°F (6.5°C). The initiation of February records an average high-temperature of a frosty 43.7°F (6.5°C), displaying a near consistency with the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a refreshing month in Saint Mary, Missouri, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 55.4°F (13°C). March sees a temperature increase, moving from a frosty 43.7°F (6.5°C) in February to a mild 55.4°F (13°C). Weather in March »
Weather in April
April is an enjoyable spring month in Saint Mary, Missouri, with an average temperature ranging between max 66.4°F (19.1°C) and min 48°F (8.9°C). Saint Mary's weather in April shows a rise in the average high-temperature, moving up from March's mild 55.4°F (13°C) to a comfortable 66.4°F (19.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Saint Mary, Missouri, with an average temperature ranging between min 57.9°F (14.4°C) and max 75.7°F (24.3°C). Saint Mary's weather in May shows a rise in the average high-temperature, moving up from April's enjoyable 66.4°F (19.1°C) to a moderately hot 75.7°F (24.3°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Saint Mary, Missouri, with temperature in the range of an average low of 66.6°F (19.2°C) and an average high of 85.1°F (29.5°C). Saint Mary in June experiences an increase in the average high-temperature, moving from May's 75.7°F (24.3°C) to a still moderately hot 85.1°F (29.5°C). Weather in June »
Weather in July
July in Saint Mary, Missouri, is a hot summer month, with an average temperature varying between 68.5°F (20.3°C) and 87.4°F (30.8°C). Saint Mary's July weather reaches an average high of 87.4°F (30.8°C) and an average low of 68.5°F (20.3°C), making it the warmest month. In July, the heat index is calculated to be a fiery hot 102.2°F (39°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Mary, is also a moderately hot month, with an average temperature ranging between max 85.8°F (29.9°C) and min 66.2°F (19°C). The advent of August observes an average high-temperature of a moderately hot 85.8°F (29.9°C), nearly identical to July's 87.4°F (30.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Saint Mary, is still a warm month, with temperature in the range of an average low of 60.1°F (15.6°C) and an average high of 79.9°F (26.6°C). As August makes way for September, Saint Mary's average high-temperature eases from a moderately hot 85.8°F (29.9°C) to a still warm 79.9°F (26.6°C). Weather in September »
Weather in October
October, like September, in Saint Mary, Missouri, is another refreshing autumn month, with an average temperature fluctuating between 67.1°F (19.5°C) and 49.1°F (9.5°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a moderately hot 79.9°F (26.6°C) to a refreshing 67.1°F (19.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Saint Mary, Missouri, with an average temperature varying between 38.7°F (3.7°C) and 53.8°F (12.1°C). The arrival of November corresponds with a reduction in the average high-temperature, down from October's refreshing 67.1°F (19.5°C) to a cool 53.8°F (12.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Saint Mary, Missouri, with an average temperature varying between 43.7°F (6.5°C) and 31.1°F (-0.5°C). The arrival of December corresponds with a reduction in the average high-temperature, down from November's cool 53.8°F (12.1°C) to a frosty 43.7°F (6.5°C). Weather in December »
Updated: Feb 12, 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 month is the coldest in Saint Mary?
January brings the lowest temperatures in Saint Mary, with an average high of 39.6°F (4.2°C) and an average low of 25.7°F (-3.5°C).
How much does it rain in Saint Mary?
Throughout the year, there are 156.4 rainfall days, and 34.25" (870mm) of precipitation is accumulated.
When does it snow in Saint Mary?
January through April, October through December are months with snowfall in Saint Mary.
How many days does it snow in Saint Mary?
In Saint Mary, Missouri, during the entire year, snow falls for 16 days and aggregates up to 6.89" (175mm) of snow.
What is the month with the least sunshine in Saint Mary?
With an average of 4.7h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index in Saint Mary?
The months with the lowest UV index in Saint Mary are January, February and December, with an average maximum UV index of 2.
What is the snowiest month in Saint Mary?
The month with the most snowfall in Saint Mary, Missouri, is February, when snow falls for 5.2 days and typically aggregates up to 2.56" (65mm) of snow.
When is Daylight Saving Time (DST) in Saint Mary?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Saint Mary, Missouri, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month in Saint Mary?
The month with the most rainfall is April, when the rain falls for 15.6 days and typically aggregates up to 4.13" (105mm) of precipitation.
What is the most humid month in Saint Mary?
The most humid month in Saint Mary is May, with an average relative humidity of 79%.
When it does not snow in Saint Mary?
May through September are months without snowfall in Saint Mary, Missouri.
When is the highest UV index in Saint Mary?
May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Mary, Missouri.
When are the longest days in Saint Mary?
With an average of 14h and 42min of daylight, June has the longest days of the year.
What is the month with the most sunshine in Saint Mary?
The months with the most sunshine are June and July, with an average of 10.5h of sunshine.
What are the warmest months in Saint Mary?
July, recording an average high temperature of 87.4°F (30.8°C) and a low temperature of 68.5°F (20.3°C), is Saint Mary's warmest month.
What is the driest month in Saint Mary?
September is the month with the least rainfall in Saint Mary, Missouri. Rain falls for 13 days and accumulates 1.97" (50mm) of precipitation.
What is the least humid month in Saint Mary?
October is the least humid month in Saint Mary, Missouri, with an average relative humidity of 71%.
What is the month with the shortest days in Saint Mary?
December has the shortest days of the year in Saint Mary, with an average of 9h and 36min of daylight.
Average temperature
Saint Mary, MO
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure
Saint Mary, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Saint Mary, MO
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.2mph - Average wind speed in March:
9.1mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.4mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.7mph - Average wind speed in November:
8.4mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Saint Mary, MO
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Saint Mary, MO
- Average rainfall in January:
2.13" - Average rainfall in February:
2.01" - Average rainfall in March:
2.95" - Average rainfall in April:
4.13" - Average rainfall in May:
3.86" - Average rainfall in June:
3.27"
- Average rainfall in July:
3.19" - Average rainfall in August:
3.19" - Average rainfall in September:
1.97" - Average rainfall in October:
2.87" - Average rainfall in November:
2.28" - Average rainfall in December:
2.4"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days
Saint Mary, MO
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
15.1 days - Average rainfall days in April:
15.6 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.9 days - Average rainfall days in September:
13 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall
Saint Mary, MO
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Saint Mary, MO
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
5.2 days - Average snowfall days in March:
1.3 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
3 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Mary, MO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Saint Mary, MO
- Average sunshine days in January:
18.8 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
13.6 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
13 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
18.7 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.8 days).
Average UV index
Saint Mary, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Saint Mary, MO
The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility
Saint Mary, MO
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Saint Mary, Missouri, USA
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