As of 12:19 CDT

Weather in Newcastle, IL

68°

Newcastle, Monday, 19 October, 12:19

Clear. Feels like 66°. High 69°, low 40°.

Pressure30.39 inHg

Wind3.8 mph S

Humidity48%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Tue, 2072° / 42°

72 °

Newcastle, Tuesday, 20 October

Clear. High 72°, low 42°.

Pressure30.36 inHg

Wind2.4 mph NE

Humidity44%

Visibility6.2 mi

Dew point45°

Wed, 2171° / 45°

71 °

Newcastle, Wednesday, 21 October

Overcast. High 71°, low 45°.

Pressure30.30 inHg

Wind2.4 mph N

Humidity49%

Visibility6.2 mi

Dew point48°

Thu, 2272° / 49°

72 °

Newcastle, Thursday, 22 October

Clear. High 72°, low 49°.

Pressure30.27 inHg

Wind4 mph NE

Humidity45%

Visibility6.2 mi

Dew point48°

Fri, 2369° / 48°

69 °

Newcastle, Friday, 23 October

Clear. High 69°, low 48°.

Pressure30.30 inHg

Wind6.4 mph E

Humidity56%

Visibility6.2 mi

Dew point49°

Sat, 2470° / 46°

70 °

Newcastle, Saturday, 24 October

Partly cloudy. High 70°, low 46°.

Pressure30.36 inHg

Wind7.6 mph E

Humidity41%

Visibility—

Dew point42°

Sun, 2575° / 53°

75 °

Newcastle, Sunday, 25 October

Overcast. High 75°, low 53°.

Pressure30.36 inHg

Wind8.8 mph S

Humidity33%

Visibility—

Dew point40°

Mon, 2676° / 59°

76 °

Newcastle, Monday, 26 October

Overcast. High 76°, low 59°.

Pressure30.24 inHg

Wind7 mph S

Humidity33%

Visibility—

Dew point40°

Tue, 2775° / 57°

0.02

75 °

Newcastle, Tuesday, 27 October

Light rain. High 75°, low 57°.

Pressure30.03 inHg

Wind13.3 mph SW

Humidity30%

Visibility—

Dew point39°

Wed, 2850° / 36°

50 °

Newcastle, Wednesday, 28 October

Clear. High 50°, low 36°.

Pressure30.33 inHg

Wind16 mph NW

Humidity22%

Visibility—

Dew point11°

Thu, 2956° / 29°

56 °

Newcastle, Thursday, 29 October

Clear. High 56°, low 29°.

Pressure30.33 inHg

Wind5.1 mph N

Humidity19%

Visibility—

Dew point10°

Fri, 3060° / 36°

60 °

Newcastle, Friday, 30 October

Overcast. High 60°, low 36°.

Pressure30.09 inHg

Wind11.9 mph S

Humidity16%

Visibility—

Dew point9°

Sat, 3153° / 47°

0.08

53 °

Newcastle, Saturday, 31 October

Light rain. High 53°, low 47°.

Pressure30.15 inHg

Wind5.9 mph E

Humidity79%

Visibility—

Dew point41°

Sun, 0171° / 50°

0.14

71 °

Newcastle, Sunday, 1 November

Light rain. High 71°, low 50°.

Pressure29.97 inHg

Wind9 mph W

Humidity57%

Visibility—

Dew point51°

Mon, 0256° / 39°

56 °

Newcastle, Monday, 2 November

Partly cloudy. High 56°, low 39°.

Pressure30.15 inHg

Wind15.1 mph N

Humidity46%

Visibility—

Dew point31°

Tue, 0353° / 39°

0.01

53 °

Newcastle, Tuesday, 3 November

Light rain. High 53°, low 39°.

Pressure30.00 inHg

Wind7.4 mph N

Humidity56%

Visibility—

Dew point36°

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 Newcastle, 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 Newcastle, 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.