October weather forecastSaint Peters, MO
October
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 conditions in October often include rain with less frequency compared to the summer months. As October transitions into November, the first signs of winter become progressively more palpable.Temperature
The onset of October introduces a moderate change in Saint Peters's weather, with average high-temperatures falling from September's warm 79.5°F (26.4°C) to a comfortable 66°F (18.9°C). Throughout the month of October, Saint Peters expects an average low of 48.4°F (9.1°C).Humidity
The least humid month is October, with an average relative humidity of 71%.Rainfall
In Saint Peters, in October, during 10.1 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 133.4 rainfall days, and 20.98" (533mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in October is 11h and 10min.On the first day of the month, sunrise is at 6:59 am and sunset at 6:44 pm. On the last day of October, sunrise is at 7:29 am and sunset at 6:02 pm CDT.
Sunshine
The average sunshine in October is 6.1h.UV index
In Saint Peters, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In October, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Saint Peters, MO
- Average high temperature in October: 66°F
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).
- Average low temperature in October: 48.4°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 in October
Saint Peters, MO
- Average pressure in October: 30.03"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 in October
Saint Peters, MO
- Average wind speed in October: 7.6mph
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 in October
Saint Peters, MO
- Average humidity in October: 71%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Saint Peters, MO
- Average rainfall in October: 1.69"
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 in October
Saint Peters, MO
- Average rainfall days in October: 10.1 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 in October
Saint Peters, MO
- Average snowfall in October: 0"
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 in October
Saint Peters, MO
- Average snowfall days in October: 0.1 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 in October /
Average sunshine in October
Saint Peters, MO
- Average daylight in October: 11h and 12min
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 October: 6h and 6min
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 in October
Saint Peters, MO
- Average sunshine days in October: 19.8 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 in October
Saint Peters, MO
- Average UV index in October: 3
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 in October
Saint Peters, MO
- Average cloud cover in October: 33
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 in October
Saint Peters, MO
- Average visibility in October: 6mi
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).
