Normal weather for Illinois in October
It's pleasantly warm in October in Illinois with an average temperature of 19°C. Temperatures this month range from a low of 11°C to a high of 25°C. At night, you can expect temperatures between 3°C and 15°C.
In October, there is an average of 94 mm of precipitation, spread over 13 days. Of the total precipitation, about 0,6 cm falls as snow in October. The wind speed is around 4 Bft, mostly coming from the South.
Illinois in October |
New York | ||
|---|---|---|---|
 Average Temperature |
19°C | 21°C | |
 High Temp |
25°C | 26°C | |
| Low Temp |
11°C | 16°C | |
 Total Precipitation |
94 mm | 119 mm | |
| Rainy Days |
13 days | 13 days | |
 Total Snowfall |
0,6 cm | 0 cm | |
| Snowy Days |
1 day | 0 days | |
Start of October
The month of October starts in Illinois with warm temps, averaging around 23°C during the day and nights around 13°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid October
By mid-October, daytime temps drop to around 19°C, with nights around 8°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
End of October
By the end of October, the average daytime temperature in Illinois is around 16°C, while nighttime temps are about 7°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Because temperatures drop in the evening, wearing layers is recommended. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is October a good time to visit Illinois?
Looking for great weather? October is a good time to be in Illinois. The temperatures are nice, and there’s not too much rain.
Check out the climate of Illinois for all months and discover the best travel time
The climate in Illinois is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Illinois to get the full picture of the climate.
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Daily Temperature in October in Illinois
This chart shows the average daily high and low temperatures in October for Illinois, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in October in Illinois
The chart below shows the average daily precipitation in October for Illinois, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for October, you can expect about 13 days of precipitation in Illinois.
Daily Snowfall in October in Illinois
This chart shows the average daily snowfall in October in Illinois, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in October.
Daily UV Index in October in Illinois
This chart shows the average daily UV index in October in Illinois, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in October in Illinois Over the Years
This chart shows the average temperature in October in Illinois, measured in degrees Celsius, over the past few years.
Total Precipitation in October in Illinois Over the Years
This chart shows the average precipitation in October in Illinois, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in October in Illinois per year
This chart shows the average snowfall in October in Illinois, measured in centimeters, over the past few years.
Daily Climate in October for Illinois
Click on any day in October to get detailed info about the usual weather on that day in Illinois. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in October in Illinois
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Average Weather in Illinois by Month
Click on a month below to see detailed weather info for Illinois. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
