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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 an icy winter month in Saint Clair, Missouri, with temperature in the range of an average low of 24.3°F (-4.3°C) and an average high of 39°F (3.9°C). In Saint Clair, the month of January registers the lowest temperatures, averaging 39°F (3.9°C) at the peak and 24.3°F (-4.3°C) at the lowest. Weather in January »
Weather in February
February, the last month of the winter in Saint Clair, is a frosty month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 43°F (6.1°C). Saint Clair experiences a minor change to a chilly 43°F (6.1°C) in average high-temperature during February, closely reflecting January. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Saint Clair, Missouri, with an average temperature fluctuating between 55°F (12.8°C) and 37.9°F (3.3°C). The shift into March is accompanied by a temperature increase, with the average high-temperature rising from a chilly 43°F (6.1°C) in February to a fresh 55°F (12.8°C). Weather in March »
Weather in April
April is a refreshing spring month in Saint Clair, Missouri, with an average temperature varying between 66.6°F (19.2°C) and 46.9°F (8.3°C). April brings a temperature increase, with average high-temperatures moving from March's cool 55°F (12.8°C) to a comfortable 66.6°F (19.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Saint Clair, Missouri, with an average temperature varying between 56.3°F (13.5°C) and 76.3°F (24.6°C). An upsurge in temperatures occurs as April gives way to May, with average highs shifting from a refreshing 66.6°F (19.2°C) to a warm 76.3°F (24.6°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Saint Clair, Missouri, with an average temperature varying between 64.9°F (18.3°C) and 85.6°F (29.8°C). The arrival of June brings an increase in high-temperatures, moving from 76.3°F (24.6°C) in May to a still moderately hot 85.6°F (29.8°C). Weather in June »
Weather in July
July is a hot summer month in Saint Clair, Missouri, with an average temperature fluctuating between 88.9°F (31.6°C) and 68°F (20°C). July is the month when Saint Clair sees the highest average temperatures, with a high of 88.9°F (31.6°C) and a low of 68°F (20°C). July's average heat index is appraised at a scorching 105.8°F (41°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Clair, is also a hot month, with an average temperature varying between 87.3°F (30.7°C) and 65.8°F (18.8°C). The beginning of August reveals an average high-temperature of a still tropical 87.3°F (30.7°C), showing minimal deviation from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Saint Clair, is still a warm month, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 80.2°F (26.8°C). The commencement of September indicates a gentle shift in the average high-temperature, receding from August's tropical 87.3°F (30.7°C) to a warm 80.2°F (26.8°C). Weather in September »
Weather in October
October, like September, in Saint Clair, Missouri, is another enjoyable autumn month, with an average temperature ranging between max 66.6°F (19.2°C) and min 48.2°F (9°C). The beginning of October marks a decrease in the average high-temperature, transitioning from a moderately hot 80.2°F (26.8°C) in September to an enjoyable 66.6°F (19.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Saint Clair, is also a fresh month, with an average temperature fluctuating between 37.2°F (2.9°C) and 53.8°F (12.1°C). Setting in of November comes with a decrease in the average high-temperature, moving from a refreshing 66.6°F (19.2°C) in October to a fresh 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 Clair, Missouri, with temperature in the range of an average high of 43.2°F (6.2°C) and an average low of 29.8°F (-1.2°C). December's arrival coincides with a drop in the average high-temperature, decreasing from November's fresh 53.8°F (12.1°C) to a frosty 43.2°F (6.2°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Saint Clair?
January is the month that records the lowest temperatures, with averages ranging from a high of 39°F (3.9°C) to a low of 24.3°F (-4.3°C).
What is the driest month in Saint Clair?
January and February are months with the least rain in Saint Clair, Missouri, when the rain falls for 5.9 days and typically aggregates up to 0.98" (25mm) of rain.
How much does it rain in Saint Clair?
Throughout the year, there are 126.7 rainfall days, and 20.63" (524mm) of precipitation is accumulated.
When does it snow in Saint Clair?
Months with snowfall are January through March, November and December.
How many days does it snow in Saint Clair?
In Saint Clair, during the entire year, snow falls for 19.3 days and aggregates up to 4.17" (106mm) of snow.
What are the months with the least sunshine in Saint Clair?
The months with the least sunshine are January and February, with an average of 4.7h of sunshine.
What is the month with the lowest UV index in Saint Clair?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Clair, Missouri.
What is the snowiest month in Saint Clair?
The month with the most snowfall in Saint Clair is February, when snow falls for 5.7 days and typically aggregates up to 1.57" (40mm) of snow.
When is Daylight Saving Time (DST) in Saint Clair?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Saint Clair, 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 rainiest month in Saint Clair?
The wettest months are April and May, with an average 2.48" (63mm) of rainfall.
When it does not snow in Saint Clair?
April through October are months without snowfall in Saint Clair, Missouri.
What is the most humid month in Saint Clair?
The most humid month in Saint Clair is May, with an average relative humidity of 78%.
What are the months with the highest UV index in Saint Clair?
The months with the highest UV index in Saint Clair are May through August, with an average maximum UV index of 6.
When are the longest days in Saint Clair?
June has the longest days of the year in Saint Clair, Missouri, with an average of 14h and 48min of daylight.
What are the months with the most sunshine in Saint Clair?
The months with the most sunshine are June and July, with an average of 10.4h of sunshine.
What is the warmest month in Saint Clair?
The warmest period in Saint Clair, Missouri, tends to be July, when average temperatures fluctuate between a high of 88.9°F (31.6°C) and a low of 68°F (20°C).
What is the least humid month in Saint Clair?
With an average relative humidity of 72%, October is the least humid month in Saint Clair, Missouri.
What is the month with the shortest days in Saint Clair?
December has the shortest days of the year in Saint Clair, Missouri, with an average of 9h and 30min of daylight.
Average temperature
Saint Clair, MO
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (39°F).
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Saint Clair, 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:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Saint Clair, MO
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.2mph - Average wind speed in April:
8.2mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.1mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7mph - Average wind speed in November:
7.8mph - Average wind speed in December:
8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Saint Clair, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Saint Clair, MO
- Average rainfall in January:
0.98" - Average rainfall in February:
0.98" - Average rainfall in March:
1.65" - Average rainfall in April:
2.48" - Average rainfall in May:
2.48" - Average rainfall in June:
2.01"
- Average rainfall in July:
2.13" - Average rainfall in August:
2.44" - Average rainfall in September:
1.46" - Average rainfall in October:
1.65" - Average rainfall in November:
1.22" - Average rainfall in December:
1.14"
The wettest months (with the highest rainfall) are April and May (2.48").
The driest months (with the least rainfall) are January and February (0.98").
Average rainfall days
Saint Clair, MO
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
7.1 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
12.9 days - Average rainfall days in May:
15.4 days - Average rainfall days in June:
12.8 days
- Average rainfall days in July:
13.5 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
6.3 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Saint Clair, MO
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Saint Clair, MO
- Average snowfall days in January:
6.2 days - Average snowfall days in February:
5.7 days - Average snowfall days in March:
2.2 days - Average snowfall days in April:
0.2 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
3.7 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Saint Clair, 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 2min - Average daylight in June:
14h and 5min
- 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 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days
Saint Clair, MO
- Average sunshine days in January:
20.6 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
15.7 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
14.2 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
15.2 days - Average sunshine days in September:
18.1 days - Average sunshine days in October:
20 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is May (13.7 days).
Average UV index
Saint Clair, 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, November and December (UV index 2).
Average cloud cover
Saint Clair, MO
The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility
Saint Clair, MO
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
Saint Clair, Missouri, USA
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