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
A shift in Shannon's weather is observed as September turns into October, with the average high temperature reducing from an agreeable 72.9°F (22.7°C) to a moderate 59.4°F (15.2°C). During October, Shannon's temperature falls to a steady low-temperature average of 43.2°F (6.2°C).Humidity
The least humid month is October, with an average relative humidity of 75%.Rainfall
In Shannon, during October, the rain falls for 10.8 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 130.8 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.43" (11mm) of snow. In Shannon, during the entire year, snow falls for 39.2 days and aggregates up to 8.62" (219mm) of snow.Daylight
The average length of the day in October is 11h and 3min.On the first day of the month, sunrise is at 6:56 am and sunset at 6:39 pm. On the last day of October, sunrise is at 7:31 am and sunset at 5:53 pm CDT.
Sunshine
The average sunshine in October is 5.4h.UV index
In October, the average daily maximum UV index in Shannon is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: An average UV index of 2 in October transforms into this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in October?
What is the least humid month?
What is the average humidity in October in Shannon?
How much does it rain in October?
When does it start to snow?
What is the average length of the day in October?
When is the sunrise / sunset in October?
How long on average sun shines in October?
How high is the UV index in October?
Average temperature in October
Shannon, IL
- Average high temperature in October: 59.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in October: 43.2°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in October
Shannon, IL
- Average pressure in October: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in October
Shannon, IL
- Average wind speed in October: 9.1mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in October
Shannon, IL
- Average humidity in October: 75%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in October
Shannon, IL
- Average rainfall in October: 1.57"
The wettest month (with the highest rainfall) is May (2.76").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days in October
Shannon, IL
- Average rainfall days in October: 10.8 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in October
Shannon, IL
- Average snowfall in October: 0.43"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Shannon, IL
- Average snowfall days in October: 0.5 days
The month with the highest number of snowfall days is January (11.2 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
Shannon, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in October: 5h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in October
Shannon, IL
- Average sunshine days in October: 18.6 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10 days).
Average UV index in October
Shannon, IL
- Average UV index in October: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in October
Shannon, IL
- Average cloud cover in October: 41
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in October
Shannon, IL
- Average visibility in October: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Shannon, Illinois, USA
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