Climate and monthly weather forecastSaint Peters, PA
Climate and monthly weather forecast
Weather in January
January, like December, in Saint Peters, Pennsylvania, is an icy winter month, with an average temperature varying between 35.2°F (1.8°C) and 22.8°F (-5.1°C). January, characterized by an average high temperature of 35.2°F (1.8°C) and a low temperature of 22.8°F (-5.1°C), is generally 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 fluctuating between 24.6°F (-4.1°C) and 38.8°F (3.8°C). Saint Peters starts February with an average high-temperature of a still icy 38.8°F (3.8°C), hinting at a minimal fluctuation from January. 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 47.1°F (8.4°C) and 32°F (0°C). As March begins, there's a slight increase in the average high-temperature, moving from an icy 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). April signals a shift in the average high-temperature, moving from March's frosty 47.1°F (8.4°C) 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). The onset of May brings a temperature shift, with the average high-temperature moving from a mild 59.7°F (15.4°C) in April to a pleasant 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 min 59.4°F (15.2°C) and max 78.1°F (25.6°C). The shift from May to June sees a slight increase in the average high-temperature, transitioning from an agreeable 70.5°F (21.4°C) 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 an average temperature varying between 83.7°F (28.7°C) and 64.2°F (17.9°C). The temperatures reach their highest averages in July, with highs of 83.7°F (28.7°C) and lows of 64.2°F (17.9°C). The heat index for July is estimated at a hot 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 ranging between max 81.1°F (27.3°C) and min 63°F (17.2°C). August registers an average high-temperature of a still moderately hot 81.1°F (27.3°C), slightly varied from July's 83.7°F (28.7°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Saint Peters, Pennsylvania, with an average temperature varying between 75°F (23.9°C) and 56.5°F (13.6°C). The advent of September brings a subtle shift in temperature, with the average high moving from 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, like September, in Saint Peters, Pennsylvania, is another refreshing autumn month, with an average temperature ranging between max 63°F (17.2°C) and min 46.9°F (8.3°C). During the transition into October, Saint Peters observes a decrease in the average high-temperature, falling from a warm 75°F (23.9°C) in September to a comfortable 63°F (17.2°C). Weather in October »Weather in November
November, the last month of the autumn in Saint Peters, is another cool month, with temperature in the range of an average high of 50.4°F (10.2°C) and an average low of 36°F (2.2°C). November's arrival correlates with a reduction in the average high-temperature, down from a comfortable 63°F (17.2°C) in October to a cool 50.4°F (10.2°C). Weather in November »Weather in December
December, the first month of the winter in Saint Peters, is still a cold month, with temperature in the range of an average high of 41.4°F (5.2°C) and an average low of 30°F (-1.1°C). The onset of December aligns with a soft reduction in the average high-temperature, gently falling from a fresh 50.4°F (10.2°C) in November to a wintry 41.4°F (5.2°C). Weather in December »Updated: Jun 4, 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
Saint Peters's January weather reaches an average high of 35.2°F (1.8°C) and an average low of 22.8°F (-5.1°C), making it the coldest month.
In Saint Peters, during the entire year, the rain falls for 162.2 days and collects up to 27.87" (708mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 22.9 snowfall days, and 10.35" (263mm) of snow is accumulated.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February and October, with an average relative humidity of 81%, are most humid months.
With an average of 4.7h of sunshine, February has the least sunshine of the year.
March is the month with the most snowfall. Snow falls for 4.3 days and accumulates 3.03" (77mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
April is the least humid month, with an average relative humidity of 76%.
May through July, with an average maximum UV index of 6, are months with the highest UV index.
In Saint Peters, snow does not fall in June through September.
With an average of 15h and 0min of daylight, June has the longest days of the year.
In Saint Peters, the average highest temperatures are observed in July, with a high of 83.7°F (28.7°C) and a low of 64.2°F (17.9°C).
The month with the most sunshine is July, with an average of 10.6h of sunshine.
August is the month with the most rainfall. Rain falls for 15.3 days and accumulates 2.83" (72mm) of precipitation.
The month with the least rainfall in Saint Peters is September, when the rain falls for 12.9 days and typically collects 1.77" (45mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
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).
Average pressure
Saint Peters, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Saint Peters, PA
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.8mph
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).
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%).
Average rainfall
Saint Peters, PA
- Average rainfall in January:
2.09" - Average rainfall in February:
2.09" - Average rainfall in March:
2.36" - Average rainfall in April:
2.4" - Average rainfall in May:
2.6" - Average rainfall in June:
2.24"
The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days
Saint Peters, PA
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.7 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
16.2 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
11.1 days
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).
Average snowfall
Saint Peters, PA
- Average snowfall in January:
2.4" - Average snowfall in February:
2.72" - Average snowfall in March:
3.03" - Average snowfall in April:
0.16" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint Peters, PA
- Average snowfall days in January:
7.3 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.2 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:
0.8 days - Average snowfall days in December:
3.6 days
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).
Average daylight / Average sunshine
Saint Peters, PA
- Average daylight in January:
9h and 42min - 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:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 48min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
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).
Average sunshine days
Saint Peters, PA
- Average sunshine days in January:
16.7 days - Average sunshine days in February:
13 days - Average sunshine days in March:
12.3 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
12.4 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
15.4 days - Average sunshine days in November:
17.8 days - Average sunshine days in December:
15.9 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (11.6 days).
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).
Average cloud cover
Saint Peters, PA
The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).
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).
