As of 22:06 CDT

Weather in Rio, IL

68°

Rio, Sunday, 11 October, 22:06

Overcast. Feels like 68°. High 82°, low 53°.

Pressure29.91 inHg

Wind5.7 mph S

Humidity76%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

Mon, 1287° / 65°

87 °

Rio, Monday, 12 October

Mostly clear. High 87°, low 65°.

Pressure29.83 inHg

Wind13.2 mph SW

Humidity56%

Visibility6.2 mi

Dew point63°

Tue, 1382° / 67°

0.04

82 °

Rio, Tuesday, 13 October

Light rain. High 82°, low 67°.

Pressure29.85 inHg

Wind5.5 mph W

Humidity65%

Visibility6.2 mi

Dew point65°

Wed, 1474° / 63°

0.34

74 °

Rio, Wednesday, 14 October

Heavy rain. High 74°, low 63°.

Pressure30.06 inHg

Wind8.9 mph NE

Humidity69%

Visibility6.2 mi

Dew point59°

Thu, 1566° / 60°

1.08

66 °

Rio, Thursday, 15 October

Rain. High 66°, low 60°.

Pressure30.03 inHg

Wind5 mph E

Humidity94%

Visibility2.7 mi

Dew point61°

Fri, 1659° / 48°

59 °

Rio, Friday, 16 October

Overcast. High 59°, low 48°.

Pressure30.45 inHg

Wind18.6 mph N

Humidity48%

Visibility—

Dew point37°

Sat, 1757° / 40°

57 °

Rio, Saturday, 17 October

Clear. High 57°, low 40°.

Pressure30.50 inHg

Wind9.5 mph S

Humidity39%

Visibility—

Dew point29°

Sun, 1862° / 38°

62 °

Rio, Sunday, 18 October

Clear. High 62°, low 38°.

Pressure30.36 inHg

Wind17.9 mph SW

Humidity33%

Visibility—

Dew point27°

Mon, 1969° / 46°

69 °

Rio, Monday, 19 October

Overcast. High 69°, low 46°.

Pressure30.27 inHg

Wind13.8 mph S

Humidity37%

Visibility—

Dew point37°

Tue, 2073° / 54°

0.01

73 °

Rio, Tuesday, 20 October

Light rain. High 73°, low 54°.

Pressure30.12 inHg

Wind12.5 mph S

Humidity53%

Visibility—

Dew point50°

Wed, 2175° / 61°

1.03

75 °

Rio, Wednesday, 21 October

Heavy rain. High 75°, low 61°.

Pressure29.91 inHg

Wind19.3 mph S

Humidity63%

Visibility—

Dew point60°

Thu, 2267° / 49°

0.7

67 °

Rio, Thursday, 22 October

Heavy rain. High 67°, low 49°.

Pressure29.83 inHg

Wind19.3 mph S

Humidity54%

Visibility—

Dew point41°

Fri, 2349° / 41°

49 °

Rio, Friday, 23 October

Clear. High 49°, low 41°.

Pressure30.06 inHg

Wind18.1 mph NW

Humidity55%

Visibility—

Dew point32°

Sat, 2452° / 35°

52 °

Rio, Saturday, 24 October

Overcast. High 52°, low 35°.

Pressure30.15 inHg

Wind10.3 mph SE

Humidity48%

Visibility—

Dew point29°

Sun, 2550° / 43°

0.11

50 °

Rio, Sunday, 25 October

Light rain. High 50°, low 43°.

Pressure29.71 inHg

Wind13.5 mph SE

Humidity63%

Visibility—

Dew point38°

Mon, 2653° / 42°

53 °

Rio, Monday, 26 October

Overcast. High 53°, low 42°.

Pressure30.03 inHg

Wind7.4 mph N

Humidity75%

Visibility—

Dew point43°

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.