What is today's weather forecast for New Castle, IL?

Today's forecast for New Castle shows a low of 43 degrees Fahrenheit. Mostly cloudy, with a low around 43.

What is the 7-day weather forecast for New Castle, IL?

The 7-day forecast for New Castle shows highs from 55 to 60 degrees and lows from 37 to 47 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in New Castle, IL this week?

Yes, rain is possible in New Castle this week. Precipitation chances: Saturday (20% chance), Sunday (40% chance), Monday (37% chance), Tuesday (38% chance), Wednesday (34% chance).

How accurate is the New Castle weather forecast?

WeatherForYou provides highly accurate New Castle forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

New Castle, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

47°F
Feels Like 47°F

Humidity 63% Dew Point 35°F Wind ENE 1 MPH Gusts 2 Barometer 29.59 in.751.6 mm

Solar Rad 0 w/m2

Report from a personal weather station 3.5 miles ESE of central New Castle
at 10:31 PM Fri, Oct 24, 2025

Current Conditions From Nearby Local Station

47°F
Feels Like 47°F

Humidity 63% Dew Point 35°F Wind ENE 1 MPH Gusts 2 Barometer 29.59 in.751.6 mm

Solar Rad 0 w/m2

Report from a personal weather station 3.5 miles ESE of central New Castle
at 10:31 PM Fri, Oct 24, 2025

Point Forecast at a Glance

FriOct 24

43°

SatOct 25

20%

59°

47°

SunOct 26

40%

60°

43°

MonOct 27

40%

59°

40°

TueOct 28

30%

58°

40°

WedOct 29

30%

55°

37°

ThuOct 30

56°

37°

7-Day Temperature Trend

Week Ahead Summary

High temperatures remain relatively stable through the week, ranging from 55°F to 60°F. Unsettled weather expected with rain likely on at least 6 days.

Climate Context

This week's forecast shows temperatures running 9°F below the historical average for October. Normal highs for this period are around 67°F with lows around 44°F.

This Date in Weather History

1785 - A four day rain swelled the Merrimack River in New Hampshire and Massachusetts to the greatest height of record causing extensive damage to bridges and mills.

New Castle 7 Day Weather Forecast Details

Friday Oct 24

Night: Mostly cloudy, with a low around 43. East wind around 6 mph.

Saturday Oct 25

Day: A slight chance of rain showers after 1pm. Cloudy, with a high near 59. East southeast wind 6 to 9 mph. Chance of precipitation is 20%.

Night: A slight chance of rain showers. Cloudy, with a low around 47. East wind around 9 mph. Chance of precipitation is 20%.

Sunday Oct 26

Day: A chance of rain showers. Mostly cloudy, with a high near 60. East wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Night: A chance of rain showers. Mostly cloudy, with a low around 43. East wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Monday Oct 27

Day: A chance of rain showers before 1pm. Partly sunny, with a high near 59. East northeast wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.