As of 05:59 CDT

Weather in Jamestown, IL

45°

Jamestown, Sunday, 18 October, 05:59

Clear. Feels like 43°. High 65°, low 41°.

Pressure30.47 inHg

Wind4.1 mph S

Humidity87%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Mon, 1969° / 44°

69 °

Jamestown, Monday, 19 October

Clear. High 69°, low 44°.

Pressure30.39 inHg

Wind2.7 mph S

Humidity49%

Visibility6.2 mi

Dew point44°

Tue, 2069° / 46°

69 °

Jamestown, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.36 inHg

Wind1.8 mph E

Humidity50%

Visibility6.2 mi

Dew point47°

Wed, 2171° / 47°

71 °

Jamestown, Wednesday, 21 October

Clear. High 71°, low 47°.

Pressure30.30 inHg

Wind1.1 mph S

Humidity47%

Visibility6.2 mi

Dew point47°

Thu, 2272° / 48°

72 °

Jamestown, Thursday, 22 October

Clear. High 72°, low 48°.

Pressure30.27 inHg

Wind4.6 mph NE

Humidity44%

Visibility—

Dew point45°

Fri, 2369° / 51°

69 °

Jamestown, Friday, 23 October

Clear. High 69°, low 51°.

Pressure30.30 inHg

Wind8.1 mph E

Humidity53%

Visibility—

Dew point48°

Sat, 2478° / 55°

78 °

Jamestown, Saturday, 24 October

Overcast. High 78°, low 55°.

Pressure30.27 inHg

Wind11.6 mph S

Humidity22%

Visibility—

Dew point32°

Sun, 2563° / 53°

63 °

Jamestown, Sunday, 25 October

Overcast. High 63°, low 53°.

Pressure30.42 inHg

Wind13.4 mph N

Humidity55%

Visibility—

Dew point44°

Mon, 2661° / 45°

61 °

Jamestown, Monday, 26 October

Overcast. High 61°, low 45°.

Pressure30.36 inHg

Wind9 mph E

Humidity31%

Visibility—

Dew point26°

Tue, 2772° / 54°

72 °

Jamestown, Tuesday, 27 October

Overcast. High 72°, low 54°.

Pressure30.18 inHg

Wind7.1 mph S

Humidity39%

Visibility—

Dew point43°

Wed, 2875° / 58°

75 °

Jamestown, Wednesday, 28 October

Overcast. High 75°, low 58°.

Pressure30.00 inHg

Wind12.1 mph S

Humidity39%

Visibility—

Dew point45°

Thu, 2964° / 58°

0.17

64 °

Jamestown, Thursday, 29 October

Light rain. High 64°, low 58°.

Pressure29.80 inHg

Wind7.8 mph S

Humidity84%

Visibility—

Dew point58°

Fri, 3075° / 56°

75 °

Jamestown, Friday, 30 October

Partly cloudy. High 75°, low 56°.

Pressure29.83 inHg

Wind10.2 mph SW

Humidity52%

Visibility—

Dew point52°

Sat, 3181° / 61°

0.06

81 °

Jamestown, Saturday, 31 October

Light rain. High 81°, low 61°.

Pressure29.83 inHg

Wind14.9 mph SW

Humidity53%

Visibility—

Dew point57°

Sun, 0185° / 63°

85 °

Jamestown, Sunday, 1 November

Clear. High 85°, low 63°.

Pressure30.00 inHg

Wind12.2 mph SW

Humidity47%

Visibility—

Dew point58°

Mon, 0281° / 65°

81 °

Jamestown, Monday, 2 November

Overcast. High 81°, low 65°.

Pressure30.12 inHg

Wind8 mph NE

Humidity44%

Visibility—

Dew point54°

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.