GRANITE CITY, IL 62040 Weather Forecast & Current Conditions

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62040 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALTON, IL Current Weather
7:50 PM CDT APR 8, 2026
Clear 68°F
Feels Like:	68°F
Dewpoint:	41°F
Rel. Hum.:	37%
Visibility:	10 miles
Wind:	S at 14 mph
Pressure:	30.07 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

62040 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	GRANITE CITY, IL 62040 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly clear. Not as cool with lows in the mid 50s. South winds 10 to 15 mph with gusts up to 25 mph.

THURSDAY
Sunny. Highs in the upper 70s. Southwest winds 10 to 15 mph.

THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 50s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.

FRIDAY
Mostly cloudy. A chance of showers in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Southwest winds 5 to 10 mph, becoming west in the afternoon. Chance of rain 70 percent.

FRIDAY NIGHT
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 50s. Northeast winds around 5 mph. Chance of rain 50 percent.

SATURDAY
Mostly cloudy with a chance of showers in the morning, then partly sunny with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 50 percent.

SATURDAY NIGHT
Mostly cloudy. Lows in the lower 60s.

SUNDAY
Mostly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent.

SUNDAY NIGHT
Mostly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 60 percent.

MONDAY AND MONDAY NIGHT
Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 50 percent.

TUESDAY AND TUESDAY NIGHT
Showers likely with a chance of thunderstorms. Highs in the lower 80s. Lows in the mid 50s. Chance of rain 70 percent.

WEDNESDAY
Mostly sunny with a chance of showers with a slight chance of thunderstorms. Cooler with highs in the upper 60s. Chance of rain 50 percent.

62040 WEATHER SATELLITE LOOPS

Visible Weather Satellite
GRANITE CITY, IL 62040

Infrared Weather Satellite
GRANITE CITY, IL 62040

62040 WEATHER RADAR LOOP

NEXRAD Weather Radar
GRANITE CITY, IL 62040

MOS COMPUTER WEATHER FORECAST

ALTON, IL 3 hourly weather forecast

weather forecast created 6:00 AM MDT 4/ 8/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
8 APR 2026

1 PM

68°

68°

Partly Cloudy

0%

0% Thunder
( 1% severe)

S 16

39%

42°

High 73°

4 PM

72°

72°

Partly Cloudy

S 17

34%

42°

Partly Cloudy

7 PM

68°

68°

Partly Cloudy

0%

0% Thunder
( 1% severe)

S 13

40%

43°

10 PM

61°

59°

Clear

S 12

51%

43°

Thursday
9 APR 2026

1 AM

57°

55°

Clear

2%

0% Thunder
( 3% severe)

S 10

62%

44°

Low 53°

4 AM

55°

52°

Partly Cloudy

S 9

64%

43°

High 78°

7 AM

54°

51°

Clear

2%

0% Thunder
( 4% severe)

S 9

66%

43°

Partly Cloudy

10 AM

67°

67°

Partly Cloudy

SSW 12

47%

46°

1 PM

76°

78°

Clear

6%

0% Thunder
( 7% severe)

SW 12

34%

46°

4 PM

78°

78°

Partly Cloudy

SSW 12

32%

46°

7 PM

73°

73°

Partly Cloudy

4%

0% Thunder
( 6% severe)

S 9

40%

47°

10 PM

65°

65°

Partly Cloudy

S 10

50%

46°

Friday
10 APR 2026

1 AM

62°

61°

Mostly Cloudy

14%
RAIN
<.01 in

0% Thunder
( 5% severe)

S 10

58%

47°

Low 57°

4 AM

59°

57°

Mostly Cloudy

SSW 10

64%

47°

High 68°

7 AM

59°

57°

Mostly Cloudy

46%
RAIN
1–2 in

0% Thunder
( 9% severe)

SSW 9

67%

48°

Mostly Cloudy

Rain Likely

10 AM

64°

63°

Mostly Cloudy

WSW 10

63%

51°

1 PM

67°

67°

Mostly Cloudy

59%
RAIN
***

0% Thunder
( 14% severe)

WSW 10

61%

53°

4 PM

67°

67°

Mostly Cloudy

NW 9

63%

54°

7 PM

63°

63°

Mostly Cloudy

N 7

70%

53°


ALTON, IL extended weather forecast
Saturday 11 APR 2026	Sunday 12 APR 2026	Monday 13 APR 2026	Tuesday 14 APR 2026	Wednesday 15 APR 2026
Low 51°	Low 56°	Low 57°	Low 60°	Low 58°
High 71°	High 76°	High 78°	High 75°	High 73°

Overcast 57% Rain	Overcast 42% Rain	Overcast 57% Rain	Overcast 43% Rain	Overcast 57% Rain

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