October weather forecast
Rio, IL

Weather in October

October, like September, in Rio, Illinois, is another enjoyable autumn month, with an average temperature fluctuating between 61.5°F (16.4°C) and 45.7°F (7.6°C).

Temperature

In Rio, Illinois, the average high-temperature in October decreases from a moderately hot 75.6°F (24.2°C) in September to an enjoyable 61.5°F (16.4°C). The average low-temperature, is 45.7°F (7.6°C).

Humidity

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

Rainfall

In Rio, in October, it is raining for 8.8 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 109.9 rainfall days, and 11.14" (283mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. October is the first month it typically snows in Rio, Illinois. Throughout October, in the average 0.3 snowfall days, it receives 0.28" (7mm) of snow. In Rio, during the entire year, snow falls for 28 days and aggregates up to 4.53" (115mm) of snow.

Daylight

In October, the average length of the day is 11h and 5min.
On the first day of the month, sunrise is at 6:58 am and sunset at 6:44 pm. On the last day of October, in Rio, Illinois, sunrise is at 7:31 am and sunset at 5:58 pm CDT.

Sunshine

The average sunshine in October in Rio, Illinois, is 5.6h.

UV index

In October, the average daily maximum UV index in Rio is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in October transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in October in Rio?

In Rio, Illinois, in October, the average high-temperature is 61.5°F (16.4°C), and the average low-temperature is 45.7°F (7.6°C). in August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the least humid month in Rio?

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

What is the average humidity in October in Rio?

The average relative humidity in October is 72%.

How much does it rain in Rio in October?

In October, in Rio, the rain falls for 8.8 days. Throughout October, 0.98" (25mm) of precipitation is accumulated.

When does it start to snow in Rio?

October is the first month it typically snows in Rio. Throughout October, in the average 0.3 snowfall days, it receives 0.28" (7mm) of snow.

What is the average length of the day in October in Rio?

In Rio, the average day length in October is 11h and 5min.

When are sunrise and sunset in October in Rio?

In October, on the first day of the month, sunrise is at 6:58 am and sunset at 6:44 pm. On the last day of the month, in Rio, Illinois, sunrise is at 7:31 am and sunset at 5:58 pm CDT.

How long on average sun shines in October in Rio?

In October, the average sunshine duration in Rio, Illinois, is 5.6h.

How high is the UV index in October in Rio?

The average daily maximum UV index in October in Rio is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Rio, IL

Average temperature in October - Rio, IL
  • Average high temperature in October: 61.5°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 (29.5°F).

  • Average low temperature in October: 45.7°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 (17.4°F).

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Average pressure in October
Rio, IL

Average pressure in October - Rio, IL
  • Average pressure in October: 30.01"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).

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Average wind speed in October
Rio, IL

Average wind speed in October - Rio, IL
  • Average wind speed in October: 9.5mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in October
Rio, IL

Average humidity in October - Rio, IL
  • Average humidity in October: 72%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in October
Rio, IL

Average rainfall in October - Rio, IL
  • Average rainfall in October: 0.98"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").

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Average rainfall days in October
Rio, IL

Average rainfall days in October - Rio, IL
  • Average rainfall days in October: 8.8 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in October
Rio, IL

Average snowfall in October - Rio, IL
  • Average snowfall in October: 0.28"

The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in October
Rio, IL

Average snowfall days in October - Rio, IL
  • Average snowfall days in October: 0.3 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Rio, IL

Average daylight in October / Average sunshine in October - Rio, IL
  • Average daylight in October: 11h and 5min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 16min).

  • Average sunshine in October: 5h and 36min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in October
Rio, IL

Average sunshine days in October - Rio, IL
  • Average sunshine days in October: 19.9 days

The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).

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Average UV index in October
Rio, IL

Average UV index in October - Rio, 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 December (UV index 1).

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Average cloud cover in October
Rio, IL

Average cloud cover in October - Rio, 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).

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Average visibility in October
Rio, IL

Average visibility in October - Rio, IL
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

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