October weather forecast
Eureka, IL

Share

Weather in October

October, the same as September, is another refreshing autumn month in Eureka, Illinois, with temperature in the range of an average high of 61.9°F (16.6°C) and an average low of 46.4°F (8°C).

Temperature

The average high-temperature decreases in October, shifting from a moderately hot 75.7°F (24.3°C) in September to a comfortable 61.9°F (16.6°C). October in Eureka sees the temperature falling to a mean low of 46.4°F (8°C).

Humidity

With an average relative humidity of 72%, October is the least humid month.

Rainfall

In Eureka, in October, during 11.8 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Eureka, during the entire year, the rain falls for 147.1 days and collects up to 24.17" (614mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 0.4 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, in Eureka, there are 34.9 snowfall days, and 11.65" (296mm) of snow is accumulated.

Daylight

In Eureka, the average length of the day in October is 11h and 7min.
On the first day of October in Eureka, sunrise is at 6:54 am and sunset at 6:38 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:54 pm CDT.

Sunshine

The average sunshine in October is 5.8h.

UV index

In October, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In October, the average maximum UV index of 3 translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Eureka in October?

The high-temperature, in October, in Eureka, records 61.9°F (16.6°C), while the low-temperature is 46.4°F (8°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is evaluated at 87.8°F (31°C).

What is the least humid month in Eureka?

The least humid month in Eureka is October, with an average relative humidity of 72%.

What is the average humidity in October in Eureka?

In October, the average relative humidity in Eureka is 72%.

How many days does it rain in October in Eureka?

In Eureka, in October, during 11.8 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When does it start snowing in Eureka?

October is the first month it typically snows in Eureka. Throughout October, in the average 0.4 snowfall days, it receives 0.16" (4mm) of snow.

How many hours of daylight does Eureka have in October?

In Eureka, the average day length in October is 11h and 7min.

What time are sunrise and sunset in October in Eureka?

On the first day of October in Eureka, Illinois, sunrise is at 6:54 am and sunset at 6:38 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:54 pm CDT.

How many hours of sunshine does Eureka have in October?

The average sunshine duration in October in Eureka, Illinois, is 5.8h.

How high is the UV index in October in Eureka?

In October, the average daily maximum UV index in Eureka is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Eureka, IL

Average temperature in October - Eureka, IL
  • Average high temperature in October: 61.9°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 (30.4°F).

  • Average low temperature in October: 46.4°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in October
Eureka, IL

Average pressure in October - Eureka, 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 (29.91"Hg).

Average wind speed in October
Eureka, IL

Average wind speed in October - Eureka, IL
  • Average wind speed in October: 9.4mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in October
Eureka, IL

Average humidity in October - Eureka, 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
Eureka, IL

Average rainfall in October - Eureka, IL
  • Average rainfall in October: 2.28"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.22").

Average rainfall days in October
Eureka, IL

Average rainfall days in October - Eureka, IL
  • Average rainfall days in October: 11.8 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (5.8 days).

Average snowfall in October
Eureka, IL

Average snowfall in October - Eureka, IL
  • Average snowfall in October: 0.16"

The months with the highest snowfall are January and February (2.8").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in October
Eureka, IL

Average snowfall days in October - Eureka, IL
  • Average snowfall days in October: 0.4 days

The month with the highest number of snowfall days is January (11 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
Eureka, IL

Average daylight in October / Average sunshine in October - Eureka, 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 18min).

  • Average sunshine in October: 5h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in October
Eureka, IL

Average sunshine days in October - Eureka, IL
  • Average sunshine days in October: 16.5 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9 days).

Average UV index in October
Eureka, IL

Average UV index in October - Eureka, IL
  • Average UV index in October: 3

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in October
Eureka, IL

Average cloud cover in October - Eureka, IL
  • Average cloud cover in October: 38

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in October
Eureka, IL

Average visibility in October - Eureka, 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).

Eureka, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location