Climate and monthly weather forecastSaint Peters, MO
Climate and monthly weather forecast
The climate of Saint Peters
Saint Peters, a city in Missouri, USA, falls under the 'Cfa', or Humid Subtropical no dry season, category of the Köppen climate classification. Records place Saint Peters at an average annual temperature that varies between a high 37.4°F (3°C) and 87.1°F (30.6°C), with the lows recorded from 23.9°F (-4.5°C) to 68.4°F (20.2°C). The city's weather presents year-round variations, with clear seasonal delineation.Climate data reveals that while sunshine hours oscillate from 4.7 to 10.5 hours a day, daylight hours see an alteration from 9.8 to 14.9 hours daily. The temperature readings alongside the sunlight duration point to distinct changes in weather across seasons. Interestingly, the relative humidity remains somewhat constant throughout the year, ranging from 71% to 78%. This shows the consistent presence of moisture in the air, regardless of the month or season.
An examination of the precipitation data delivers a discernible trend as well. Rainfall inches see a hike between 1.06" (27mm) in February to 2.48" (63mm) in April, witnessing a subsequent decline to 1.26" (32mm) in December. By contrast, the snowfall shows its presence from 0.98" (25mm) in January to 1.34" (34mm) in December with noticeable absences from April to November. The city's average wind speed remains moderately stable from 5.5mph (8.9km/h) to 9.1mph (14.6km/h) throughout the year, frequently accompanied by gusts reaching up to 14.4mph (23.2km/h).
The best time to visit Saint Peters
Planning a visit to Saint Peters would prove most enjoyable when the climate shows its most agreeable side. Given the temperature, sunshine, and precipitation data, the months from May to September might serve as the best window for a visit. During this time, temperatures range from a high of 74.7°F (23.7°C) to 87.1°F (30.6°C), and lows between 57°F (13.9°C) to 68.4°F (20.2°C). Sunshine hours are highest with 9.6 to 10.5 hours daily, and daylight extends from 14.3 to 14.9 hours a day. The city offers a delightful and warm atmosphere that would surely enrich the trip.The worst time to visit Saint Peters
It's crucial to carefully assess the potential drawbacks of visiting Saint Peters during certain times of the year. Given the weather data, the period from December through February could pose challenges for visitors. During these months, temperatures can drop to an average low of 23.9°F (-4.5°C)-27.1°F (-32.8°C) and reach only up to 37.4°F (3°C)-42.1°F (-41.2°C). Alongside this reduced temperature range, daylight hours shrink to 9.5-10.8 hours a day, and the city averages only 4.7-5 hours of sunshine.Spring weather in Saint Peters
The climax of spring in Saint Peters comes with an escalating scale of temperatures, reaching a high from 54.1°F (12.3°C) in March to 74.7°F (23.7°C) in May. Corresponding lows also witness an increase from 37.9°F (3.3°C) to 57°F (13.9°C). These are accompanied by an increment in sunshine hours from 6.6 to 9.6 hours a day. Average rainfall inches also rise, peaking at 2.48" (63mm) in April before declining slightly to 2.44" (62mm) in May.Summer weather in Saint Peters
June to August marks the summer season in Saint Peters, and it is perhaps the city's warmest period. High temperatures reach a peak at 87.1°F (30.6°C) in July and lows remain pleasant at 66°F (18.9°C)-68.4°F (-55.8°C). Humidity rises slightly and the average rainfall amounts record over 2.24" (57mm) monthly. Despite this, the city basks in abundant sunshine, receiving between 10.5 hours per day throughout these months.Autumn weather in Saint Peters
Autumn in Saint Peters presents a decrease in temperatures, with September experiencing a high of 79.5°F (26.4°C), which then falls gradually to 53.2°F (11.8°C) by November. The low average temperatures also see a decline from 59.7°F (15.4°C) to 37.6°F (3.1°C). The daylight hours decrease notably, falling from 12.4 to 10.1 hours per day from September to November, mirroring the retreat of summer.Winter weather in Saint Peters
Winter ushers in a drop in temperatures in Saint Peters, with highs from 41.9°F (5.5°C) in December to 37.4°F (3°C) in January. The lows also see a similar dip, from 30°F (-1.1°C) in December to 23.9°F (-4.5°C) in January, the coldest month of the year. December and January also mark a rise in snowfall, with an average of 1.34" (34mm) and 0.98" (25mm) respectively. Interestingly, December records the longest nights of the year, with daylight hours reducing to a minimum of 9.5 hours, and sunshine hours at 5. Despite these conditions, the city's winter has its own tranquillity and charm.Weather in January
January showcases the cool, crisp specifics of Saint Peters, Missouri in the heart of winter. It can be described that this beginning month provides cooler temperatures, abundant cloud coverage coupled with reduced sunlight. Snowfall of 0.98" (25mm) typically accompanies the arrival of the new year. Weather in January »Weather in February
February in Saint Peters, Missouri often brings slightly elevated temperatures compared to January. A gradual increase in daylight hours is observed, indicating the approach of spring. February is the month with the highest snowfall of 1.65" (42mm) observed. Weather in February »Weather in March
The weather in March sees the commencement of warmer weather patterns for Saint Peters, Missouri. Increased daylight and rising temperatures herald the onset of spring. This month is associated with the highest rise in average daily temperature, from 37.4°F (3°C) to 54.1°F (12.3°C), signifying the transition from winter to spring. Weather in March »Weather in April
April's weather in Saint Peters, Missouri boasts the full-blown effects of spring. Its characteristic mild temperatures and longer daylight hours make outdoor activities more enticing. The significant increase in rainfall is apparent, with the amount of rainfall more than doubling to 2.48" (63mm) when compared to the previous month. Weather in April »Weather in May
May presents an amalgamation of increased warmth and humidity in Saint Peters, Missouri. Marked increases in temperature and rising humidity levels characterize the advent of summer. This month stands out due to its peak temperature raising above 74.7°F (23.7°C) for the first time in the year. Weather in May »Weather in June
June marks a quintessential summer month for Saint Peters, Missouri with its distinctly warmer weather pattern. Extended daylight, increased sunshine hours, and prevalent high temperatures define this month. This month witnesses the highest average low temperature of 66°F (18.9°C). Weather in June »Weather in July
July in Saint Peters, Missouri, is the pinnacle of summer. It is characterized by the year's hottest temperatures, elevated humidity levels, and generous sunshine. The peak temperature for the year is experienced in July, with average highs reaching 87.1°F (30.6°C). Weather in July »Weather in August
August is a persistently warm and humid month for Saint Peters, Missouri. Although temperatures begin to dip from their peak, they remain high contributing to a noticeable summer heat. August stands out due to its uniquely high average temperature of 85.3°F (29.6°C) amidst a slow cooling trend. Weather in August »Weather in September
September brings welcome relief from the summer heat in Saint Peters, Missouri. Falling temperatures, reduced rainfall, and shorter daylight hours hint at the onset of autumn. This month is characterized by a significant drop in average daily temperatures from 85.3°F (29.6°C) to 79.5°F (26.4°C). Weather in September »Weather in October
October manifests an undeniable autumnal feel in Saint Peters, Missouri. Cooler temperatures, reduced daylight hours and falls in humidity are indicative of the changing seasons. Given the first signs of winter, temperatures continue to decrease noticeably month-to-month. Weather in October »Weather in November
November ushers the initial signs of winter for Saint Peters, Missouri. In marked contrast to October, this month heralds shorter daylight hours, lower temperatures, and the first traces of snow. Increased cloud cover and a decrease in average temperature from 66°F (18.9°C) to 53.2°F (11.8°C) signal a definite shift in the weather pattern. Weather in November »Weather in December
December concludes the year in Saint Peters, Missouri with the arrival of winter. The cold temperatures, increased snowfall, and shortened daylight hours mark the essence of this month. December gains distinction from accumulating 1.34" (34mm) of snowfall, signifying the onset of the winter season. Weather in December »Updated: Aug 16, 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
January, on average, is the coldest month, registering a high temperature of 37.4°F (3°C) and a low of 23.9°F (-4.5°C).
Throughout the year, in Saint Peters, there are 133.4 rainfall days, and 20.98" (533mm) of precipitation is accumulated.
January through March, November and December are months with snowfall.
Throughout the year, there are 19.4 snowfall days, and 4.92" (125mm) of snow is accumulated.
With an average of 4.7h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The month with the least rainfall is February, when the rain falls for 6.7 days and typically collects 1.06" (27mm) of precipitation.
February is the month with the most snowfall. Snow falls for 5.8 days and accumulates 1.65" (42mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
April is the month with the most rainfall. Rain falls for 13.4 days and accumulates 2.48" (63mm) of precipitation.
April through October are months without snowfall.
May is the most humid month, with an average relative humidity of 78%.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the longest days in Saint Peters is June, with an average of 14h and 48min of daylight.
The months with the most sunshine are June and July, with an average of 10.5h of sunshine.
In Saint Peters, July registers the highest temperatures, averaging 87.1°F (30.6°C) at the peak and 68.4°F (20.2°C) at the lowest.
The least humid month in Saint Peters is October, with an average relative humidity of 71%.
December has the shortest days of the year, with an average of 9h and 30min of daylight.
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).
Average pressure
Saint Peters, 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 Peters, MO
- Average wind speed in January:
9.1mph - Average wind speed in February:
9mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.4mph - Average wind speed in December:
8.5mph
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).
Average humidity
Saint Peters, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Saint Peters, MO
- Average rainfall in January:
1.14" - Average rainfall in February:
1.06" - Average rainfall in March:
1.5" - Average rainfall in April:
2.48" - Average rainfall in May:
2.44" - Average rainfall in June:
2.24"
The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days
Saint Peters, MO
- Average rainfall days in January:
7.2 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
7.4 days
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).
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").
Average snowfall days
Saint Peters, MO
- Average snowfall days in January:
5.8 days - Average snowfall days in February:
5.8 days - Average snowfall days in March:
1.9 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:
1.4 days - Average snowfall days in December:
4.1 days
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).
Average daylight / Average sunshine
Saint Peters, MO
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
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 42min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 36min - Average sunshine in May:
9h and 36min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 36min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 36min - 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 Peters, MO
- Average sunshine days in January:
20.4 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
16.2 days - Average sunshine days in April:
15 days - Average sunshine days in May:
13 days - Average sunshine days in June:
12.9 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is July (12.7 days).
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).
Average cloud cover
Saint Peters, MO
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
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).
