Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The transition into October involves a decrease in the average high-temperature, falling from a moderately hot 77.4°F (25.2°C) in September to a refreshing 63.9°F (17.7°C). Petersburg experiences an average low-temperature of 47.7°F (8.7°C) in month of October.Humidity
October is the least humid month, with an average relative humidity of 70%.Rainfall
In Petersburg, Illinois, in October, it is raining for 11.6 days, with typically 2.8" (71mm) of accumulated precipitation. Throughout the year, there are 146.4 rainfall days, and 30.67" (779mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Petersburg. October is the first month it typically snows. Throughout October, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Petersburg, there are 29.2 snowfall days, and 10.39" (264mm) of snow is accumulated.Daylight
In October, the average length of the day in Petersburg, Illinois, is 11h and 8min.On the first day of October, sunrise is at 6:56 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:57 pm CDT.
Sunshine
In Petersburg, the average sunshine in October is 5.8h.UV index
In October, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 3 during October translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October in Petersburg?
What is the least humid month in Petersburg?
What is the average humidity in October in Petersburg?
How much does it rain in Petersburg in October?
When does it start to snow in Petersburg?
What is the average length of the day in October in Petersburg?
When are sunrise and sunset in October in Petersburg?
How many hours of sunshine does Petersburg have in October?
What is the UV index intensity in October in Petersburg?
Average temperature in October
Petersburg, IL
- Average high temperature in October: 63.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in October: 47.7°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in October
Petersburg, IL
- Average pressure in October: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in October
Petersburg, IL
- Average wind speed in October: 9.1mph
The windiest months (with the highest average wind speed) are January, February and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in October
Petersburg, IL
- Average humidity in October: 70%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in October
Petersburg, IL
- Average rainfall in October: 2.8"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days in October
Petersburg, IL
- Average rainfall days in October: 11.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in October
Petersburg, IL
- Average snowfall in October: 0.04"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Petersburg, IL
- Average snowfall days in October: 0.2 days
The month with the highest number of snowfall days is January (10.3 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
Petersburg, IL
- Average daylight in October: 11h and 1min
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 October: 5h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in October
Petersburg, IL
- Average sunshine days in October: 17.6 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in October
Petersburg, 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
Petersburg, IL
- Average cloud cover in October: 36
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in October
Petersburg, IL
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Petersburg, Illinois, USA
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