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As of 22:41 CDT

Weather in Jamestown, IL

43°Current weather

Jamestown, Saturday, 17 October, 22:41

Clear. Feels like 41°. High 59°, low 41°.

Pressure30.47 inHg
Wind3.8 mph SE
Humidity82%
Visibility6.2 mi
Dew point38°
Sun, 1864° / 39°0Clear
64 °Clear

Jamestown, Sunday, 18 October

Clear. High 64°, low 39°.

Pressure30.47 inHg
Wind7.6 mph S
Humidity47%
Visibility6.2 mi
Dew point39°
Mon, 1968° / 44°0Clear
68 °Clear

Jamestown, Monday, 19 October

Clear. High 68°, low 44°.

Pressure30.39 inHg
Wind2 mph S
Humidity48%
Visibility6.2 mi
Dew point43°
Tue, 2069° / 46°0Partly cloudy
69 °Partly cloudy

Jamestown, Tuesday, 20 October

Partly cloudy. High 69°, low 46°.

Pressure30.39 inHg
Wind2.1 mph E
Humidity47%
Visibility6.2 mi
Dew point46°
Wed, 2170° / 47°0Clear
70 °Clear

Jamestown, Wednesday, 21 October

Clear. High 70°, low 47°.

Pressure30.30 inHg
Wind2 mph SE
Humidity52%
Visibility6.2 mi
Dew point48°
Thu, 2272° / 48°0Clear
72 °Clear

Jamestown, Thursday, 22 October

Clear. High 72°, low 48°.

Pressure30.24 inHg
Wind4.8 mph NE
Humidity44%
Visibility—
Dew point45°
Fri, 2373° / 51°0Clear
73 °Clear

Jamestown, Friday, 23 October

Clear. High 73°, low 51°.

Pressure30.27 inHg
Wind8.7 mph SE
Humidity46%
Visibility—
Dew point46°
Sat, 2478° / 56°0Overcast
78 °Overcast

Jamestown, Saturday, 24 October

Overcast. High 78°, low 56°.

Pressure30.24 inHg
Wind10.8 mph S
Humidity24%
Visibility—
Dew point33°
Sun, 2567° / 51°0Overcast
67 °Overcast

Jamestown, Sunday, 25 October

Overcast. High 67°, low 51°.

Pressure30.36 inHg
Wind12.1 mph N
Humidity46%
Visibility—
Dew point44°
Mon, 2662° / 44°0Overcast
62 °Overcast

Jamestown, Monday, 26 October

Overcast. High 62°, low 44°.

Pressure30.39 inHg
Wind8.4 mph N
Humidity29%
Visibility—
Dew point25°
Tue, 2769° / 46°0Overcast
69 °Overcast

Jamestown, Tuesday, 27 October

Overcast. High 69°, low 46°.

Pressure30.30 inHg
Wind7.7 mph SE
Humidity29%
Visibility—
Dew point29°
Wed, 2868° / 53°0Overcast
68 °Overcast

Jamestown, Wednesday, 28 October

Overcast. High 68°, low 53°.

Pressure30.15 inHg
Wind9.9 mph S
Humidity47%
Visibility—
Dew point40°
Thu, 2976° / 59°0.04Light rain
76 °Light rain

Jamestown, Thursday, 29 October

Light rain. High 76°, low 59°.

Pressure29.91 inHg
Wind21.1 mph S
Humidity34%
Visibility—
Dew point44°
Fri, 3071° / 60°0.04Light rain
71 °Light rain

Jamestown, Friday, 30 October

Light rain. High 71°, low 60°.

Pressure29.97 inHg
Wind10.5 mph SW
Humidity67%
Visibility—
Dew point57°
Sat, 3171° / 56°1.49Heavy rain
71 °Heavy rain

Jamestown, Saturday, 31 October

Heavy rain. High 71°, low 56°.

Pressure29.94 inHg
Wind13.6 mph SE
Humidity66%
Visibility—
Dew point57°
Sun, 0171° / 56°0.18Light rain
71 °Light rain

Jamestown, Sunday, 1 November

Light rain. High 71°, low 56°.

Pressure29.94 inHg
Wind20.4 mph SW
Humidity36%
Visibility—
Dew point42°

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.