Climate and monthly weather forecast
Saint Peters, MO

Weather in January

January, the same as December, is another cold winter month in Saint Peters, Missouri, with temperature in the range of an average low of 23.9°F (-4.5°C) and an average high of 37.4°F (3°C). With an average high-temperature of 37.4°F (3°C) and an average low-temperature of 23.9°F (-4.5°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Saint Peters, is another cold month, with an average temperature varying between 27.1°F (-2.7°C) and 42.1°F (5.6°C). In Saint Peters, the average high-temperature in February is almost the same as in January - a still cold 42.1°F (5.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a fresh month in Saint Peters, Missouri, with an average temperature ranging between max 54.1°F (12.3°C) and min 37.9°F (3.3°C). In Saint Peters, the average high-temperature in March rises from a wintry 42.1°F (5.6°C) in February to a cool 54.1°F (12.3°C). Weather in March »

Weather in April

April is an enjoyable spring month in Saint Peters, Missouri, with temperature in the range of an average high of 65.3°F (18.5°C) and an average low of 47.3°F (8.5°C). In Saint Peters, Missouri, the average high-temperature in April rises from a cool 54.1°F (12.3°C) in March to a comfortable 65.3°F (18.5°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Saint Peters, Missouri, with an average temperature ranging between max 74.7°F (23.7°C) and min 57°F (13.9°C). In Saint Peters, the average high-temperature in May increases from an enjoyable 65.3°F (18.5°C) in April to a warm 74.7°F (23.7°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Saint Peters, Missouri, with an average temperature varying between 66°F (18.9°C) and 84°F (28.9°C). In June, the average high-temperature rises from a warm 74.7°F (23.7°C) in May to a still moderately hot 84°F (28.9°C). Weather in June »

Weather in July

July is a tropical summer month in Saint Peters, Missouri, with an average temperature ranging between max 87.1°F (30.6°C) and min 68.4°F (20.2°C). With an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 68.4°F (20.2°C), July is the warmest month. The average heat index in July is computed to be a sweltering 101.5°F (38.6°C). Weather in July »

Weather in August

August, the last month of the summer in Saint Peters, is another warm month, with an average temperature fluctuating between 66.4°F (19.1°C) and 85.3°F (29.6°C). In August, the average high-temperature is essentially the same as in July - a moderately hot 85.3°F (29.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Saint Peters, Missouri, with temperature in the range of an average low of 59.7°F (15.4°C) and an average high of 79.5°F (26.4°C). In September, the average high-temperature slightly decreases from 85.3°F (29.6°C) in August to a still moderately hot 79.5°F (26.4°C). Weather in September »

Weather in October

October, like September, in Saint Peters, Missouri, is another enjoyable autumn month, with an average temperature fluctuating between 48.4°F (9.1°C) and 66°F (18.9°C). In Saint Peters, the average high-temperature in October decreases from a warm 79.5°F (26.4°C) in September to an enjoyable 66°F (18.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Saint Peters, Missouri, with temperature in the range of an average low of 37.6°F (3.1°C) and an average high of 53.2°F (11.8°C). In Saint Peters, the average high-temperature in November decreases from a comfortable 66°F (18.9°C) in October to a fresh 53.2°F (11.8°C). Weather in November »

Weather in December

December, the first month of the winter in Saint Peters, is still a cold month, with an average temperature varying between 41.9°F (5.5°C) and 30°F (-1.1°C). In Saint Peters, the average high-temperature in December drops from a fresh 53.2°F (11.8°C) in November to a wintry 41.9°F (5.5°C). Weather in December »
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FAQ

What is the coldest month in Saint Peters?

The coldest month is January, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 23.9°F (-4.5°C).

How many days does it rain in Saint Peters?

Throughout the year, in Saint Peters, there are 133.4 rainfall days, and 20.98" (533mm) of precipitation is accumulated.

When does it snow in Saint Peters?

January through March, November and December are months with snowfall in Saint Peters.

How much does it snow in Saint Peters?

Throughout the year, there are 19.4 snowfall days, and 4.92" (125mm) of snow is accumulated.

What is the month with the least sunshine in Saint Peters?

January has the least sunshine of the year, with an average of 4.7h of sunshine.

What is the month with the lowest UV index in Saint Peters?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the driest month in Saint Peters?

The month with the least rainfall is February, when the rain falls for 6.7 days and typically collects 1.06" (27mm) of precipitation.

When does it snow the most in Saint Peters?

February is the month with the most snowfall. Snow falls for 5.8 days and accumulates 1.65" (42mm) of snow.

When is Daylight Saving Time (DST) in Saint Peters?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Saint Peters?

The month with the most rainfall in Saint Peters, Missouri, is April, when the rain falls for 13.4 days and typically aggregates up to 2.48" (63mm) of precipitation.

When it does not snow in Saint Peters?

April through October are months without snowfall.

What is the most humid month in Saint Peters?

With an average relative humidity of 78%, May is the most humid month in Saint Peters.

What is the month with the highest UV index in Saint Peters?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

When are the longest days in Saint Peters?

With an average of 14h and 50min of daylight, June has the longest days of the year in Saint Peters, Missouri.

What is the month with the most sunshine in Saint Peters?

June and July, with an average of 10.5h of sunshine, are months with the most sunshine in Saint Peters.

What is the warmest month in Saint Peters?

The warmest month is July, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 68.4°F (20.2°C).

What is the least humid month in Saint Peters?

With an average relative humidity of 71%, October is the least humid month.

What is the month with the shortest days in Saint Peters?

With an average of 9h and 31min of daylight, December has the shortest days of the year in Saint Peters.

Average temperature
Saint Peters, MO

Average temperature - Saint Peters, MO

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure
Saint Peters, MO

Average pressure - Saint Peters, MO

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Saint Peters, MO

Average wind speed - Saint Peters, MO

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average rainfall
Saint Peters, MO

Average rainfall - Saint Peters, MO

The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is February (1.06").

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Average rainfall days
Saint Peters, MO

Average rainfall days - Saint Peters, MO

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.7 days).

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Average snowfall
Saint Peters, MO

Average snowfall - Saint Peters, MO

The month with the highest snowfall is February (1.65").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Saint Peters, MO

Average snowfall days - Saint Peters, MO

The months with the highest number of snowfall days are January and February (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Saint Peters, MO

Average daylight / Average sunshine - Saint Peters, MO

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 31min).

The months with the most sunshine are June and July (Average sunshine: 10.5h).
The month with the least sunshine is January (Average sunshine: 4.7h).

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Average sunshine days
Saint Peters, MO

Average sunshine days - Saint Peters, MO

The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is July (12.7 days).

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Average UV index
Saint Peters, MO

Average UV index - Saint Peters, 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).

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Average visibility
Saint Peters, MO

Average visibility - Saint Peters, 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).

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