As of 09:20 CDT

Weather in Marion, IL

70°

Marion, Monday, 12 October, 09:20

Clear. Feels like 70°. High 89°, low 62°.

Pressure30.03 inHg

Wind4.6 mph S

Humidity77%

Visibility6.2 mi

Dew point62°

See detailed hourly forecast

Tue, 1391° / 65°

91 °

Marion, Tuesday, 13 October

Clear. High 91°, low 65°.

Pressure29.97 inHg

Wind8.6 mph SW

Humidity52%

Visibility6.2 mi

Dew point64°

Wed, 1481° / 72°

0.21

81 °

Marion, Wednesday, 14 October

Rain. High 81°, low 72°.

Pressure30.06 inHg

Wind7.4 mph SW

Humidity77%

Visibility6.2 mi

Dew point71°

Thu, 1583° / 71°

0.41

83 °

Marion, Thursday, 15 October

Heavy rain. High 83°, low 71°.

Pressure30.03 inHg

Wind10 mph SW

Humidity80%

Visibility6.2 mi

Dew point73°

Fri, 1671° / 55°

0.22

71 °

Marion, Friday, 16 October

Rain. High 71°, low 55°.

Pressure30.33 inHg

Wind18.6 mph N

Humidity46%

Visibility—

Dew point41°

Sat, 1762° / 46°

62 °

Marion, Saturday, 17 October

Clear. High 62°, low 46°.

Pressure30.47 inHg

Wind9.9 mph N

Humidity48%

Visibility—

Dew point39°

Sun, 1869° / 41°

69 °

Marion, Sunday, 18 October

Clear. High 69°, low 41°.

Pressure30.33 inHg

Wind10.4 mph S

Humidity22%

Visibility—

Dew point23°

Mon, 1974° / 51°

74 °

Marion, Monday, 19 October

Overcast. High 74°, low 51°.

Pressure30.27 inHg

Wind12.1 mph S

Humidity49%

Visibility—

Dew point50°

Tue, 2080° / 59°

0.03

80 °

Marion, Tuesday, 20 October

Light rain. High 80°, low 59°.

Pressure30.18 inHg

Wind8.6 mph S

Humidity47%

Visibility—

Dew point55°

Wed, 2179° / 60°

79 °

Marion, Wednesday, 21 October

Partly cloudy. High 79°, low 60°.

Pressure30.24 inHg

Wind8.8 mph SE

Humidity60%

Visibility—

Dew point58°

Thu, 2283° / 62°

83 °

Marion, Thursday, 22 October

Mostly clear. High 83°, low 62°.

Pressure30.27 inHg

Wind9.7 mph SE

Humidity40%

Visibility—

Dew point53°

Fri, 2380° / 65°

80 °

Marion, Friday, 23 October

Overcast. High 80°, low 65°.

Pressure30.30 inHg

Wind13.8 mph SW

Humidity40%

Visibility—

Dew point51°

Sat, 2483° / 61°

83 °

Marion, Saturday, 24 October

Overcast. High 83°, low 61°.

Pressure30.12 inHg

Wind17.1 mph S

Humidity50%

Visibility—

Dew point57°

Sun, 2572° / 58°

0.07

72 °

Marion, Sunday, 25 October

Light rain. High 72°, low 58°.

Pressure30.06 inHg

Wind15.7 mph NW

Humidity41%

Visibility—

Dew point44°

Mon, 2663° / 49°

63 °

Marion, Monday, 26 October

Overcast. High 63°, low 49°.

Pressure30.21 inHg

Wind12.3 mph NW

Humidity30%

Visibility—

Dew point27°

Tue, 2772° / 44°

72 °

Marion, Tuesday, 27 October

Clear. High 72°, low 44°.

Pressure29.85 inHg

Wind15.8 mph NW

Humidity28%

Visibility—

Dew point33°

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 Marion, 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 Marion, 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.