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
In October, the average high-temperature decreases from a moderately hot 74.7°F (23.7°C) in September to a comfortable 61.7°F (16.5°C). The average temperature during October nights dips to a chilly 45.9°F (7.7°C).Humidity
October is the least humid month in Seneca, with an average relative humidity of 72%.Rainfall
In October, the rain falls for 12.8 days. Throughout October, 2.87" (73mm) of precipitation is accumulated. Throughout the year, there are 154.1 rainfall days, and 31.73" (806mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Seneca, Illinois. October is the first month it typically snows in Seneca. Throughout October, in the average 0.4 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, in Seneca, Illinois, there are 39.8 snowfall days, and 15.71" (399mm) of snow is accumulated.Daylight
In October, the average length of the day in Seneca is 11h and 5min.On the first day of the month, sunrise is at 6:51 am and sunset at 6:35 pm. On the last day of October, in Seneca, sunrise is at 7:25 am and sunset at 5:50 pm CDT.
Sunshine
In Seneca, the average sunshine in October is 5.9h.UV index
The average daily maximum UV index in October in Seneca is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In October, an average UV index of 3 transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Seneca in October?
What is the least humid month in Seneca?
What is the average humidity in October in Seneca?
How much does it rain in Seneca in October?
When does it start snowing in Seneca?
How many hours of daylight does Seneca have in October?
When is the sunrise / sunset in October in Seneca?
How long on average sun shines in October in Seneca?
How high is the UV index in October in Seneca?
Average temperature in October
Seneca, IL
- Average high temperature in October: 61.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in October: 45.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in October
Seneca, IL
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Seneca, IL
- Average wind speed in October: 9mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in October
Seneca, 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
Seneca, IL
- Average rainfall in October: 2.87"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in October
Seneca, IL
- Average rainfall days in October: 12.8 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in October
Seneca, IL
- Average snowfall in October: 0.12"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Seneca, IL
- Average snowfall days in October: 0.4 days
The month with the highest number of snowfall days is January (11.9 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
Seneca, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in October: 5h and 5min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in October
Seneca, IL
- Average sunshine days in October: 16 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in October
Seneca, IL
- Average UV index in October: 3
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in October
Seneca, IL
- Average cloud cover in October: 39
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in October
Seneca, 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).
Seneca, Illinois, USA
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