October weather forecast
Saint Peter, IL

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Weather in October

October, like September, in Saint Peter, Illinois, is another refreshing autumn month, with an average temperature varying between 48.4°F (9.1°C) and 65.1°F (18.4°C).

Temperature

The average high-temperature drops in October, from September's warm 77.9°F (25.5°C) to a refreshing 65.1°F (18.4°C). Nightly temperatures in Saint Peter drop to an average low of 48.4°F (9.1°C) in October.

Humidity

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

Rainfall

In October, the rain falls for 9.7 days. Throughout October, 1.97" (50mm) of precipitation is accumulated. Throughout the year, in Saint Peter, there are 139.3 rainfall days, and 23.94" (608mm) of precipitation is accumulated.

Snowfall

In Saint Peter, Illinois, snow does not fall in May through October.

Daylight

In October, the average length of the day in Saint Peter is 11h and 10min.
On the first day of the month, sunrise is at 6:52 am and sunset at 6:37 pm. On the last day of October, sunrise is at 7:22 am and sunset at 5:55 pm CDT.

Sunshine

The average sunshine in October in Saint Peter, Illinois, is 6.3h.

UV index

In Saint Peter, Illinois, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In October, the average maximum UV index of 3 translates into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Saint Peter in October?

In Saint Peter, in October, the average high-temperature is 65.1°F (18.4°C), and the average low-temperature is 48.4°F (9.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the least humid month in Saint Peter?

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

What is the average humidity in October in Saint Peter?

In Saint Peter, Illinois, the average relative humidity in October is 71%.

How many days does it rain in October in Saint Peter?

In Saint Peter, Illinois, in October, it is raining for 9.7 days, with typically 1.97" (50mm) of accumulated precipitation.

When it does not snow in Saint Peter?

May through October are months without snowfall in Saint Peter, Illinois.

Does it snow in Saint Peter in October?

In Saint Peter, Illinois, in October, it doesn't snow. In November, it regularly snows.

How many hours of daylight does Saint Peter have in October?

In October, the average day length is 11h and 10min.

What time are sunrise and sunset in October in Saint Peter?

In October, on the first day of the month, sunrise is at 6:52 am and sunset at 6:37 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:55 pm CDT.

How many hours of sunshine does Saint Peter have in October?

In October, the average sunshine duration in Saint Peter, Illinois, is 6.3h.

What is the UV index intensity in October in Saint Peter?

The average daily maximum UV index in October in Saint Peter, Illinois, is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Saint Peter, IL

Average temperature in October - Saint Peter, IL
  • Average high temperature in October: 65.1°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in October: 48.4°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in October
Saint Peter, IL

Average pressure in October - Saint Peter, IL
  • 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 (29.93"Hg).

Average wind speed in October
Saint Peter, IL

Average wind speed in October - Saint Peter, IL
  • Average wind speed in October: 8.7mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in October
Saint Peter, IL

Average humidity in October - Saint Peter, IL
  • Average humidity in October: 71%

The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in October
Saint Peter, IL

Average rainfall in October - Saint Peter, IL
  • Average rainfall in October: 1.97"

The wettest months (with the highest rainfall) are April and June (2.95").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in October
Saint Peter, IL

Average rainfall days in October - Saint Peter, IL
  • Average rainfall days in October: 9.7 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in October
Saint Peter, IL

Average snowfall in October - Saint Peter, IL
  • Average snowfall in October: 0"

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

Average snowfall days in October
Saint Peter, IL

Average snowfall days in October - Saint Peter, IL
  • Average snowfall days in October: 0.1 days

The month with the highest number of snowfall days is January (5.7 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 Peter, IL

Average daylight in October / Average sunshine in October - Saint Peter, IL
  • Average daylight in October: 11h and 1min

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 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in October
Saint Peter, IL

Average sunshine days in October - Saint Peter, IL
  • Average sunshine days in October: 19.4 days

The months with the most sunshine days are January and November (19.5 days).
The months with the least sunshine days are May and July (12.3 days).

Average UV index in October
Saint Peter, IL

Average UV index in October - Saint Peter, IL
  • Average UV index in October: 3

The months with the highest UV index are 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 Peter, IL

Average cloud cover in October - Saint Peter, IL
  • Average cloud cover in October: 34

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and July (Cloud cover 29).

Average visibility in October
Saint Peter, IL

Average visibility in October - Saint Peter, IL
  • 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).

Saint Peter, Illinois, USA

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