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Forecast confidence: High · models disagree by 3°F

South Shore weather

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Light drizzle,rain likely tomorrow

NWS, the American and the European model agree on a high near 70° in South Shore today. Tomorrow looks rain around 75°, with a 98% chance of rain.

70°65°
75°64°
70°64°
64°60°
63°57°
62°58°
Todaymodels agreeTomorrowsplit ±5°Sundaymodels agreeMondaymodels agreeTuesdaysplit ±4°Wednesdaymodels agree
NWSNational Blend (NBM)
75°
Overcast
Feels 80° · Wind 6 mph · Humidity 87%
AmericanNOAA GFS
69°
Overcast
Feels 74° · Wind 2 mph · Humidity 95%
EuropeanECMWF
80°
Overcast
Feels 86° · Wind 6 mph · Humidity 78%

Latest for South Shore: NWS (National Blend (NBM)): 75° Overcast · American (NOAA GFS): 69° Overcast · European (ECMWF): 80° Overcast.

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South Shore weather alerts and warnings

active National Weather Service watches, warnings and advisories

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South Shore weather in numbers

from 30 years of measured normals

South Shore swings 55°F across the year, from 79°F highs in July to 24°F lows in January, and July is usually the wettest month in a year that brings about 42 in of precipitation.

Warmest month
July
79°F average high
Coldest month
January
24°F average low
Wettest month
July
42 in a year
Below freezing
3 months
January, February and December
Comfortable
4 months
May, June, September and October
Residents
51,000
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The weather map: all three models at once

NWS, American, European side by side around South Shore and nearby towns.Live rain radar →
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South Shore hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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South Shore 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Light drizzle
70° 65°
models agree
Tomorrow
Rain
75° 64°
±5°
Sun
Rain
70° 64°
models agree
Mon
Drizzle
64° 60°
models agree
Tue
Light drizzle
63° 57°
±4°
Wed
Partly cloudy
62° 58°
models agree
Thu
Light drizzle
64° 59°
models agree
Fri
Partly cloudy
66° 60°
models agree
Sat
Mostly clear
69° 59°
±8°
Sun
Cloudy
71° 56°
±8°
Mon
Light drizzle
69° 56°
models agree
Tue
Drizzle
60° 53°
±16°
Wed
Light drizzle
61° 49°
models agree
Thu
Cloudy
67° 50°
models agree

South Shore, Illinois (IL) is at its warmest in Jul (average highs near 79°F) and coldest in Jan (lows around 24°F), with roughly 42 in of precipitation across the year. Below, compare what NWS, American, European forecast for South Shore right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

South Shore climate by month

average daytime high and overnight low across a typical year
Jan
34°
24°
Feb
43°
28°
Mar
47°
33°
Apr
58°
42°
May
67°
51°
Jun
77°
62°
Jul
79°
66°
Aug
79°
66°
Sep
74°
61°
Oct
64°
50°
Nov
51°
39°
Dec
40°
31°

Which forecast is most accurate in South Shore?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
87
/100rank #1
78±2.2°F92±2.6 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
71
/100rank #2
78±2.2°F94±1.7 mph4771% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±3°69° to 72°±58%17% to 75% chance
Tomorrow±5°73° to 78°±43%55% to 98% chance
Sun±1°70° to 71°±9%89% to 98% chance
Mon±1°63° to 64°±2%41% to 43% chance
Tue±4°61° to 65°±22%15% to 37% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in South Shore

today, local time
Sunrise
06:33
Sunset
18:54
Daylight
12h 21m

Common questions

What's the weather in South Shore today?
On this page we show what NWS, American, European each forecast for South Shore today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in South Shore today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for South Shore and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for South Shore?
Over the last 30 days, the European model has been the most accurate for South Shore (CheckWeather Score 87/100), ahead of the American at 71. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in South Shore?
July is typically the warmest month in South Shore, with average highs around 79°F.
How cold does South Shore get?
The coldest month in South Shore is January, when overnight lows average about 24°F.
How much rain does South Shore get?
South Shore sees roughly 42 in of precipitation a year, with July usually the wettest month.

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