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As of 21:30 CDT

Weather in Rio, IL

70°Current weather

Rio, Friday, 9 October, 21:30

Clear. Feels like 69°. High 77°, low 55°.

Pressure30.00 inHg
Wind4.6 mph SE
Humidity58%
Visibility6.2 mi
Dew point54°
Sat, 1080° / 61°0Overcast
80 °Overcast

Rio, Saturday, 10 October

Overcast. High 80°, low 61°.

Pressure30.03 inHg
Wind10.3 mph S
Humidity53%
Visibility6.2 mi
Dew point57°
Sun, 1179° / 55°0Clear
79 °Clear

Rio, Sunday, 11 October

Clear. High 79°, low 55°.

Pressure29.94 inHg
Wind6.7 mph S
Humidity56%
Visibility6.2 mi
Dew point57°
Mon, 1284° / 66°0Clear
84 °Clear

Rio, Monday, 12 October

Clear. High 84°, low 66°.

Pressure29.83 inHg
Wind12.1 mph SW
Humidity56%
Visibility6.2 mi
Dew point63°
Tue, 1378° / 66°0Clear
78 °Clear

Rio, Tuesday, 13 October

Clear. High 78°, low 66°.

Pressure29.85 inHg
Wind7.1 mph NW
Humidity67%
Visibility6.2 mi
Dew point65°
Wed, 1469° / 63°0.12Light rain
69 °Light rain

Rio, Wednesday, 14 October

Light rain. High 69°, low 63°.

Pressure30.09 inHg
Wind10.3 mph NE
Humidity69%
Visibility—
Dew point58°
Thu, 1569° / 56°0.08Light rain
69 °Light rain

Rio, Thursday, 15 October

Light rain. High 69°, low 56°.

Pressure30.24 inHg
Wind16.3 mph W
Humidity60%
Visibility—
Dew point49°
Fri, 1660° / 46°0Partly cloudy
60 °Partly cloudy

Rio, Friday, 16 October

Partly cloudy. High 60°, low 46°.

Pressure29.94 inHg
Wind25.9 mph W
Humidity46%
Visibility—
Dew point37°
Sat, 1744° / 35°0.01Light rain
44 °Light rain

Rio, Saturday, 17 October

Light rain. High 44°, low 35°.

Pressure30.42 inHg
Wind23.5 mph W
Humidity51%
Visibility—
Dew point26°
Sun, 1853° / 31°0Clear
53 °Clear

Rio, Sunday, 18 October

Clear. High 53°, low 31°.

Pressure30.39 inHg
Wind14.9 mph S
Humidity34%
Visibility—
Dew point20°
Mon, 1961° / 39°0Clear
61 °Clear

Rio, Monday, 19 October

Clear. High 61°, low 39°.

Pressure30.33 inHg
Wind9.5 mph S
Humidity38%
Visibility—
Dew point31°
Tue, 2066° / 47°0Overcast
66 °Overcast

Rio, Tuesday, 20 October

Overcast. High 66°, low 47°.

Pressure30.18 inHg
Wind15.5 mph S
Humidity37%
Visibility—
Dew point34°
Wed, 2159° / 50°0.9Rain
59 °Rain

Rio, Wednesday, 21 October

Rain. High 59°, low 50°.

Pressure29.97 inHg
Wind15.4 mph SE
Humidity78%
Visibility—
Dew point50°
Thu, 2260° / 54°0.38Light rain
60 °Light rain

Rio, Thursday, 22 October

Light rain. High 60°, low 54°.

Pressure29.65 inHg
Wind14.5 mph NW
Humidity87%
Visibility—
Dew point55°
Fri, 2365° / 49°0Mostly clear
65 °Mostly clear

Rio, Friday, 23 October

Mostly clear. High 65°, low 49°.

Pressure29.94 inHg
Wind11.3 mph NW
Humidity64%
Visibility—
Dew point49°
Sat, 2455° / 43°0Overcast
55 °Overcast

Rio, Saturday, 24 October

Overcast. High 55°, low 43°.

Pressure30.00 inHg
Wind18 mph NW
Humidity54%
Visibility—
Dew point38°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Rio, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Rio, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.