ALTON, IL 62002 Weather Forecast & Current Conditions

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62002 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALTON, IL Current Weather
8:50 PM CDT APR 3, 2026
Scattered Clouds 79°F
Feels Like:	80°F
Dewpoint:	61°F
Rel. Hum.:	54%
Visibility:	10 miles
Wind:	S at 14 mph
Pressure:	29.94 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

62002 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	ALTON, IL 62002 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly cloudy. A chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Lows in the mid 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.

SATURDAY
Cloudy. Showers with a chance of thunderstorms in the morning. Much cooler. Less humid with highs in the lower 60s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.

SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Much cooler with lows in the upper 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph.

SUNDAY
Sunny. Highs in the upper 50s. Northwest winds 10 to 15 mph.

SUNDAY NIGHT
Clear. Lows around 40. West winds 5 to 10 mph.

MONDAY
Sunny. Highs in the lower 60s.

MONDAY NIGHT
Mostly cloudy. A slight chance of showers after midnight. Lows in the upper 30s. Chance of rain 20 percent.

TUESDAY AND TUESDAY NIGHT
Mostly cloudy. Highs in the mid 50s. Lows around 40.

WEDNESDAY
Mostly sunny. Not as cool with highs in the lower 70s.

WEDNESDAY NIGHT
Mostly clear. Not as cool with lows in the mid 50s.

THURSDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 20 percent.

THURSDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. Chance of rain 30 percent.

FRIDAY
Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40 percent.

62002 WEATHER SATELLITE LOOPS

Visible Weather Satellite
ALTON, IL 62002

Infrared Weather Satellite
ALTON, IL 62002

62002 WEATHER RADAR LOOP

NEXRAD Weather Radar
ALTON, IL 62002

MOS COMPUTER WEATHER FORECAST

ALTON, IL 3 hourly weather forecast

weather forecast created 5:00 AM MST 4/ 3/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Friday
3 APR 2026

12 PM

76°

78°

Mostly Cloudy

43%
RAIN
.1–.25 in

0% Thunder
( 28% severe)

S 14

69%

65°

High 80°

3 PM

79°

81°

Mostly Cloudy

S 16

58%

63°

Mostly Cloudy

Rain Likely

6 PM

76°

78°

Mostly Cloudy

65%
RAIN
.25–.5 in

0% Thunder
( 48% severe)

S 13

62%

62°

9 PM

72°

72°

Mostly Cloudy

S 12

68%

61°

Saturday
4 APR 2026

12 AM

69°

69°

Mostly Cloudy

97%
RAIN
***

0% Thunder
( 39% severe)

S 12

78%

62°

Low 55°

3 AM

65°

65°

Mostly Cloudy

SW 12

84%

60°

High 62°

6 AM

61°

60°

Mostly Cloudy

83%
RAIN
***

0% Thunder
( 10% severe)

W 10

87%

57°

Mostly Cloudy

Rain Likely

9 AM

56°

53°

Mostly Cloudy

WNW 14

83%

51°

12 PM

55°

51°

Mostly Cloudy

20%
RAIN
.01–.1 in

0% Thunder
( 1% severe)

WNW 15

69%

45°

3 PM

56°

52°

Mostly Cloudy

WNW 16

57%

41°

6 PM

53°

49°

Partly Cloudy

2%

0% Thunder
( 1% severe)

WNW 14

52%

36°

9 PM

47°

42°

Partly Cloudy

WNW 10

60%

34°

Sunday
5 APR 2026

12 AM

44°

39°

Partly Cloudy

1%

0% Thunder
( 1% severe)

WNW 8

68%

34°

Low 38°

3 AM

41°

36°

Partly Cloudy

WNW 8

70%

32°

High 60°

6 AM

39°

33°

Partly Cloudy

1%

0% Thunder
( 0% severe)

WNW 8

76%

32°

Partly Cloudy

9 AM

46°

40°

Partly Cloudy

NW 13

58%

32°

12 PM

53°

49°

Clear

1%

0% Thunder
( 0% severe)

NW 13

45%

32°

3 PM

57°

54°

Clear

NW 13

40%

33°

6 PM

55°

53°

Clear

NW 8

45%

34°


ALTON, IL extended weather forecast
Monday 6 APR 2026	Tuesday 7 APR 2026	Wednesday 8 APR 2026	Thursday 9 APR 2026	Friday 10 APR 2026
Low 38°	Low 33°	Low 35°	Low 48°	Low 50°
High 55°	High 51°	High 62°	High 68°	High 73°

Mostly Cloudy 24% Rain	Mostly Cloudy 24% Rain	Partly Cloudy 17% Rain	Partly Cloudy 26% Rain	Partly Cloudy 28% Rain

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