October weather forecastPotomac, IL
October
Weather in October
October, like September, in Potomac, Illinois, is another comfortable autumn month, with an average temperature fluctuating between 46.9°F (8.3°C) and 62.8°F (17.1°C).Temperature
The decrease of average high-temperatures is mild in October, with a decline from a moderately hot 75.6°F (24.2°C) in September to a refreshing 62.8°F (17.1°C). An average temperature of 46.9°F (8.3°C) marks the nights in Potomac in October.Humidity
With an average relative humidity of 72%, October is the least humid month in Potomac, Illinois.Rainfall
In Potomac, in October, during 11.9 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, there are 146.3 rainfall days, and 22.76" (578mm) of precipitation is accumulated.Snowfall
In Potomac, snow does not fall in May through October.Daylight
The average length of the day in October in Potomac is 11h and 7min.On the first day of the month, sunrise is at 6:48 am and sunset at 6:32 pm. On the last day of October, sunrise is at 7:20 am and sunset at 5:49 pm CDT.
Sunshine
In Potomac, Illinois, the average sunshine in October is 6.2h.UV index
In October, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 3 in October transforms into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Enhance your sun protection with tightly woven, yet airy clothing. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Potomac, IL
- Average high temperature in October: 62.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in October: 46.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in October
Potomac, IL
- Average pressure in October: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Potomac, IL
- Average wind speed in October: 9.2mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in October
Potomac, IL
- Average humidity in October: 72%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in October
Potomac, IL
- Average rainfall in October: 1.73"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in October
Potomac, IL
- Average rainfall days in October: 11.9 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in October
Potomac, IL
- Average snowfall in October: 0"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Potomac, IL
- Average snowfall days in October: 0.2 days
The month with the highest number of snowfall days is January (9.8 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
Potomac, IL
- Average daylight in October: 11h and 6min
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: 6h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in October
Potomac, IL
- Average sunshine days in October: 17.1 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in October
Potomac, IL
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in October
Potomac, IL
- Average cloud cover in October: 38
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are June, August and September (Cloud cover 33).
Average visibility in October
Potomac, 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).
