Climate and monthly weather forecast
Saint Peters, PA

Weather in January

January, like December, in Saint Peters, Pennsylvania, is another cold winter month, with temperature in the range of an average low of 22.8°F (-5.1°C) and an average high of 35.2°F (1.8°C). With an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 22.8°F (-5.1°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 ranging between min 24.6°F (-4.1°C) and max 38.8°F (3.8°C). In Saint Peters, the average high-temperature in February is almost the same as in January - a still wintry 38.8°F (3.8°C). Weather in February »

Weather in March

March, the first month of the spring in Saint Peters, is a frosty month, with an average temperature fluctuating between 32°F (0°C) and 47.1°F (8.4°C). In Saint Peters, the average high-temperature in March slightly increases from a cold 38.8°F (3.8°C) in February to a chilly 47.1°F (8.4°C). Weather in March »

Weather in April

April is a mild spring month in Saint Peters, Pennsylvania, with an average temperature fluctuating between 42.1°F (5.6°C) and 59.7°F (15.4°C). In Saint Peters, the average high-temperature in April rises from a chilly 47.1°F (8.4°C) in March to a mild 59.7°F (15.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Saint Peters, Pennsylvania, with temperature in the range of an average low of 51.8°F (11°C) and an average high of 70.5°F (21.4°C). In Saint Peters, the average high-temperature in May rises from a moderate 59.7°F (15.4°C) in April to an agreeable 70.5°F (21.4°C). Weather in May »

Weather in June

June, the first month of the summer in Saint Peters, is a moderately hot month, with an average temperature ranging between max 78.1°F (25.6°C) and min 59.4°F (15.2°C). In Saint Peters, the average high-temperature in June marginally rises from a pleasant 70.5°F (21.4°C) in May to a moderately hot 78.1°F (25.6°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Saint Peters, Pennsylvania, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 64.2°F (17.9°C). With an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 64.2°F (17.9°C), July is the warmest month. In July, the average heat index is calculated to be a tropical 91.4°F (33°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 63°F (17.2°C) and 81.1°F (27.3°C). In Saint Peters, the average high-temperature in August is almost the same as in July - a still warm 81.1°F (27.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Saint Peters, is also a moderately hot month, with an average temperature ranging between min 56.5°F (13.6°C) and max 75°F (23.9°C). In September, the average high-temperature slightly decreases from a warm 81.1°F (27.3°C) in August to a still moderately hot 75°F (23.9°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Saint Peters, Pennsylvania, with an average temperature varying between 63°F (17.2°C) and 46.9°F (8.3°C). In October, the average high-temperature drops from a warm 75°F (23.9°C) in September to a comfortable 63°F (17.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Saint Peters, Pennsylvania, with an average temperature fluctuating between 36°F (2.2°C) and 50.4°F (10.2°C). In November, the average high-temperature drops from an enjoyable 63°F (17.2°C) in October to a cool 50.4°F (10.2°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Saint Peters, Pennsylvania, with an average temperature ranging between max 41.4°F (5.2°C) and min 30°F (-1.1°C). In December, the average high-temperature marginally drops from a fresh 50.4°F (10.2°C) in November to a cold 41.4°F (5.2°C). Weather in December »
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FAQ

What is the coldest month in Saint Peters?

With an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 22.8°F (-5.1°C), January is the coldest month in Saint Peters.

How many days does it rain in Saint Peters?

Throughout the year, there are 162.2 rainfall days, and 27.87" (708mm) of precipitation is accumulated.

When does it snow in Saint Peters?

Months with snowfall in Saint Peters are January through May, October through December.

How much does it snow in Saint Peters?

In Saint Peters, Pennsylvania, during the entire year, snow falls for 22.9 days and aggregates up to 10.35" (263mm) of snow.

When is the lowest UV index in Saint Peters?

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

What is the most humid month in Saint Peters?

The months with the highest humidity are February and October, with an average relative humidity of 81%.

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

With an average of 4.7h of sunshine, February has the least sunshine of the year in Saint Peters, Pennsylvania.

What is the snowiest month in Saint Peters?

The month with the most snowfall in Saint Peters is March, when snow falls for 4.3 days and typically aggregates up to 3.03" (77mm) of snow.

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

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Saint Peters, Pennsylvania, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Saint Peters?

April is the least humid month, with an average relative humidity of 76%.

What are the months with the highest UV index in Saint Peters?

The months with the highest UV index in Saint Peters, Pennsylvania, are May through July, with an average maximum UV index of 6.

When it does not snow in Saint Peters?

In Saint Peters, snow does not fall in June through September.

When are the longest days in Saint Peters?

The month with the longest days is June, with an average of 14h and 59min of daylight.

What is the warmest month in Saint Peters?

July is the warmest month, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 64.2°F (17.9°C).

What month has the most sunshine in Saint Peters?

The month with the most sunshine in Saint Peters, Pennsylvania, is July, with an average of 10.6h of sunshine.

What is the rainiest month in Saint Peters?

The month with the most rainfall in Saint Peters, Pennsylvania, is August, when the rain falls for 15.3 days and typically aggregates up to 2.83" (72mm) of precipitation.

What is the driest month in Saint Peters?

September is the month with the least rainfall in Saint Peters, Pennsylvania. Rain falls for 12.9 days and accumulates 1.77" (45mm) of precipitation.

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

December has the shortest days of the year in Saint Peters, Pennsylvania, with an average of 9h and 22min of daylight.

Average temperature
Saint Peters, PA

Average temperature - Saint Peters, PA

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

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Average pressure
Saint Peters, PA

Average pressure - Saint Peters, PA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Saint Peters, PA

Average wind speed - Saint Peters, PA

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Saint Peters, PA

Average humidity - Saint Peters, PA

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall
Saint Peters, PA

Average rainfall - Saint Peters, PA

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days
Saint Peters, PA

Average rainfall days - Saint Peters, PA

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall
Saint Peters, PA

Average snowfall - Saint Peters, PA

The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Saint Peters, PA

Average snowfall days - Saint Peters, PA

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Saint Peters, PA

Average daylight / Average sunshine - Saint Peters, PA

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days
Saint Peters, PA

Average sunshine days - Saint Peters, PA

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (11.6 days).

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Average UV index
Saint Peters, PA

Average UV index - Saint Peters, PA

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Saint Peters, PA

Average visibility - Saint Peters, PA

The months with the highest visibility are January, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are February, May, September and October (5mi).

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