ALTON, IL 62002 Weather Forecast & Current Conditions

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62002 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALTON, IL Current Weather
12:35 AM CDT JUL 20, 2025
Clear 79°F
Feels Like:	83°F
Dewpoint:	75°F
Rel. Hum.:	88%
Visibility:	10 miles
Wind:	S at 5 mph
Pressure:	29.95 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Weather Map

(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

REST OF TONIGHT
Partly cloudy. Near steady temperature in the upper 70s. Southwest winds around 5 mph.

SUNDAY
Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109.

SUNDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms. Humid with lows in the mid 70s. Southwest winds around 5 mph, becoming east after midnight. Chance of rain 50 percent. Heat index values up to 106 early in the evening.

MONDAY
Mostly cloudy in the morning, then becoming mostly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Humid with highs in the lower 90s. West winds around 5 mph. Chance of rain 50 percent. Heat index values up to 106.

MONDAY NIGHT
Partly cloudy. Humid with lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 104 early in the evening.

TUESDAY THROUGH THURSDAY NIGHT
Mostly clear. Hot. Highs in the upper 90s. Lows in the upper 70s. Heat index values up to 110.

FRIDAY
Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 110.

FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 70s. Heat index values up to 105 early in the evening.

SATURDAY
Sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110.

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 6:00 PM MDT 7/19/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
20 JUL 2025

1 AM

76°

76°

Partly Cloudy

7%

0% Thunder
( 12% severe)

SSW 3

94%

74°

Low 74°

4 AM

75°

75°

Mostly Cloudy

SSW 5

94%

73°

High 93°

7 AM

76°

76°

Mostly Cloudy

8%

0% Thunder
( 8% severe)

SW 5

90%

73°

Mostly Cloudy

10 AM

82°

87°

Mostly Cloudy

WSW 8

74%

73°

1 PM

89°

97°

Partly Cloudy

18%
RAIN
.1–.25 in

0% Thunder
( 28% severe)

SW 8

59%

73°

4 PM

91°

99°

Partly Cloudy

WSW 7

54%

72°

7 PM

88°

96°

Partly Cloudy

40%
RAIN
***

0% Thunder
( 60% severe)

W 7

61%

73°

10 PM

80°

85°

Partly Cloudy

NNE 5

82%

74°

Monday
21 JUL 2025

1 AM

77°

78°

Mostly Cloudy

26%
RAIN
***

0% Thunder
( 27% severe)

E 3

90%

74°

Low 74°

4 AM

75°

75°

Mostly Cloudy

ENE 3

97%

74°

High 88°

7 AM

76°

76°

Mostly Cloudy

17%
RAIN
***

0% Thunder
( 24% severe)

E 3

94%

74°

Mostly Cloudy

Chance of Rain

10 AM

80°

85°

Mostly Cloudy

NW 6

82%

74°

1 PM

85°

93°

Mostly Cloudy

22%
RAIN
<.01 in

0% Thunder
( 28% severe)

NE 6

72%

75°

4 PM

86°

94°

Partly Cloudy

E 6

68%

74°

7 PM

84°

91°

Partly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 37% severe)

E 7

72%

74°

10 PM

78°

81°

Partly Cloudy

E 5

91%

75°


ALTON, IL extended weather forecast
BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE
Low 73°	Low 73°	Low 74°	Low 73°	Low 72°
High 87°	High 89°	High 94°	High 92°	High 89°

Overcast 66% Rain	Partly Cloudy 46% Rain	Partly Cloudy 34% Rain	Partly Cloudy 25% Rain	Partly Cloudy 30% Rain

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