As of 19:28 CDT

Weather in Rio, IL

65°

Rio, Thursday, 8 October, 19:28

Clear. Feels like 64°. High 76°, low 49°.

Pressure30.06 inHg

Wind0 mph N

Humidity60%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Fri, 0981° / 54°

0.02

81 °

Rio, Friday, 9 October

Light rain. High 81°, low 54°.

Pressure30.09 inHg

Wind10.2 mph E

Humidity67%

Visibility4.6 mi

Dew point56°

Sat, 1077° / 58°

77 °

Rio, Saturday, 10 October

Overcast. High 77°, low 58°.

Pressure30.06 inHg

Wind8.1 mph S

Humidity55%

Visibility6.2 mi

Dew point57°

Sun, 1177° / 54°

77 °

Rio, Sunday, 11 October

Clear. High 77°, low 54°.

Pressure29.97 inHg

Wind3 mph S

Humidity60%

Visibility6.2 mi

Dew point57°

Mon, 1282° / 62°

82 °

Rio, Monday, 12 October

Overcast. High 82°, low 62°.

Pressure29.85 inHg

Wind11.2 mph SW

Humidity56%

Visibility6.2 mi

Dew point62°

Tue, 1369° / 60°

69 °

Rio, Tuesday, 13 October

Overcast. High 69°, low 60°.

Pressure29.97 inHg

Wind12.1 mph NE

Humidity74%

Visibility—

Dew point58°

Wed, 1471° / 56°

0.48

71 °

Rio, Wednesday, 14 October

Rain. High 71°, low 56°.

Pressure29.91 inHg

Wind14.6 mph S

Humidity94%

Visibility—

Dew point56°

Thu, 1574° / 66°

0.52

74 °

Rio, Thursday, 15 October

Rain. High 74°, low 66°.

Pressure30.00 inHg

Wind15.6 mph SW

Humidity48%

Visibility—

Dew point53°

Fri, 1665° / 49°

0.35

65 °

Rio, Friday, 16 October

Rain. High 65°, low 49°.

Pressure30.36 inHg

Wind15.1 mph N

Humidity55%

Visibility—

Dew point43°

Sat, 1751° / 40°

51 °

Rio, Saturday, 17 October

Clear. High 51°, low 40°.

Pressure30.53 inHg

Wind13 mph N

Humidity51%

Visibility—

Dew point31°

Sun, 1855° / 38°

55 °

Rio, Sunday, 18 October

Clear. High 55°, low 38°.

Pressure30.56 inHg

Wind6.8 mph SE

Humidity41%

Visibility—

Dew point28°

Mon, 1959° / 41°

59 °

Rio, Monday, 19 October

Partly cloudy. High 59°, low 41°.

Pressure30.42 inHg

Wind11.4 mph S

Humidity40%

Visibility—

Dew point31°

Tue, 2068° / 45°

68 °

Rio, Tuesday, 20 October

Clear. High 68°, low 45°.

Pressure30.21 inHg

Wind12.8 mph S

Humidity50%

Visibility—

Dew point44°

Wed, 2170° / 55°

0.1

70 °

Rio, Wednesday, 21 October

Light rain. High 70°, low 55°.

Pressure30.03 inHg

Wind10.9 mph W

Humidity65%

Visibility—

Dew point54°

Thu, 2268° / 51°

68 °

Rio, Thursday, 22 October

Clear. High 68°, low 51°.

Pressure30.15 inHg

Wind7.1 mph W

Humidity53%

Visibility—

Dew point47°

Fri, 2371° / 53°

71 °

Rio, Friday, 23 October

Clear. High 71°, low 53°.

Pressure30.21 inHg

Wind5.2 mph SE

Humidity51%

Visibility—

Dew point48°

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.