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As of 03:14 CDT

Weather in Jamestown, IL

56°Current weather

Jamestown, Friday, 16 October, 03:14

Overcast. Feels like 55°. High 59°, low 52°.

Pressure30.06 inHg
Wind18.4 mph NW
Humidity83%
Visibility6.2 mi
Dew point51°
Sat, 1760° / 43°0Clear
60 °Clear

Jamestown, Saturday, 17 October

Clear. High 60°, low 43°.

Pressure30.56 inHg
Wind4.3 mph NE
Humidity50%
Visibility6.2 mi
Dew point37°
Sun, 1862° / 42°0Clear
62 °Clear

Jamestown, Sunday, 18 October

Clear. High 62°, low 42°.

Pressure30.50 inHg
Wind7.6 mph S
Humidity41%
Visibility6.2 mi
Dew point35°
Mon, 1968° / 43°0Clear
68 °Clear

Jamestown, Monday, 19 October

Clear. High 68°, low 43°.

Pressure30.39 inHg
Wind4.6 mph SE
Humidity50%
Visibility6.2 mi
Dew point44°
Tue, 2069° / 45°0Overcast
69 °Overcast

Jamestown, Tuesday, 20 October

Overcast. High 69°, low 45°.

Pressure30.33 inHg
Wind4.5 mph E
Humidity39%
Visibility—
Dew point40°
Wed, 2173° / 48°0Mostly clear
73 °Mostly clear

Jamestown, Wednesday, 21 October

Mostly clear. High 73°, low 48°.

Pressure30.27 inHg
Wind4.7 mph SE
Humidity37%
Visibility—
Dew point40°
Thu, 2277° / 53°0Overcast
77 °Overcast

Jamestown, Thursday, 22 October

Overcast. High 77°, low 53°.

Pressure30.24 inHg
Wind6.3 mph SE
Humidity25%
Visibility—
Dew point34°
Fri, 2378° / 55°0Overcast
78 °Overcast

Jamestown, Friday, 23 October

Overcast. High 78°, low 55°.

Pressure30.15 inHg
Wind9.5 mph SE
Humidity24%
Visibility—
Dew point34°
Sat, 2477° / 57°0Overcast
77 °Overcast

Jamestown, Saturday, 24 October

Overcast. High 77°, low 57°.

Pressure30.18 inHg
Wind7.6 mph SE
Humidity28%
Visibility—
Dew point38°
Sun, 2576° / 55°0Overcast
76 °Overcast

Jamestown, Sunday, 25 October

Overcast. High 76°, low 55°.

Pressure30.21 inHg
Wind6.8 mph E
Humidity33%
Visibility—
Dew point40°
Mon, 2679° / 58°0Overcast
79 °Overcast

Jamestown, Monday, 26 October

Overcast. High 79°, low 58°.

Pressure30.03 inHg
Wind14.8 mph S
Humidity33%
Visibility—
Dew point43°
Tue, 2768° / 48°0Clear
68 °Clear

Jamestown, Tuesday, 27 October

Clear. High 68°, low 48°.

Pressure30.06 inHg
Wind9.3 mph NW
Humidity33%
Visibility—
Dew point34°
Wed, 2867° / 52°0.58Heavy rain
67 °Heavy rain

Jamestown, Wednesday, 28 October

Heavy rain. High 67°, low 52°.

Pressure29.71 inHg
Wind21.8 mph W
Humidity80%
Visibility—
Dew point51°
Thu, 2962° / 45°0Partly cloudy
62 °Partly cloudy

Jamestown, Thursday, 29 October

Partly cloudy. High 62°, low 45°.

Pressure29.97 inHg
Wind18 mph W
Humidity48%
Visibility—
Dew point38°
Fri, 3068° / 47°0Overcast
68 °Overcast

Jamestown, Friday, 30 October

Overcast. High 68°, low 47°.

Pressure30.06 inHg
Wind6.6 mph NW
Humidity43%
Visibility—
Dew point40°
Sat, 3171° / 50°0Overcast
71 °Overcast

Jamestown, Saturday, 31 October

Overcast. High 71°, low 50°.

Pressure29.97 inHg
Wind10.3 mph S
Humidity37%
Visibility—
Dew point41°

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 Jamestown, 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 Jamestown, 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.