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
Arrival of October in Decatur, Illinois, comes with a reduction in the average high-temperature, falling from a warm 77°F (25°C) in September to an enjoyable 64°F (17.8°C). October nights in Decatur, Illinois, are marked by an average temperature drop to a chilly 48°F (8.9°C).Humidity
With an average relative humidity of 70%, October is the least humid month in Decatur.Rainfall
In Decatur, in October, during 9.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Decatur, during the entire year, the rain falls for 130.2 days and collects up to 16.34" (415mm) of precipitation.Snowfall
In Decatur, snow does not fall in May through October.Daylight
The average length of the day in October is 11h and 8min.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, in Decatur, sunrise is at 7:24 am and sunset at 5:54 pm CDT.
Sunshine
In October, the average sunshine is 6.3h.UV index
In Decatur, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 3 in October suggests the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average October temperature in Decatur?
What is the least humid month in Decatur?
What is the average humidity in October in Decatur?
How much does it rain in Decatur in October?
When it does not snow in Decatur?
Does it snow in Decatur in October?
How many hours of daylight does Decatur have in October?
When are sunrise and sunset in October in Decatur?
How long on average sun shines in October in Decatur?
How high is the UV index in October in Decatur?
Average temperature in October
Decatur, IL
- Average high temperature in October: 64°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in October: 48°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in October
Decatur, IL
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Decatur, IL
- Average wind speed in October: 9.4mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in October
Decatur, 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
Decatur, IL
- Average rainfall in October: 1.22"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in October
Decatur, IL
- Average rainfall days in October: 9.5 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in October
Decatur, IL
- Average snowfall in October: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Decatur, IL
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Decatur, 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: 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 6min).
Average sunshine days in October
Decatur, IL
- Average sunshine days in October: 19.8 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in October
Decatur, 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
Decatur, IL
- Average cloud cover in October: 35
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in October
Decatur, 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).
Decatur, Illinois, USA
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