SOUTHERN ILLINOIS UNIVERSITY, IL 62026 Weather Forecast & Current Conditions

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62026 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALTON, IL Current Weather
11:35 PM CDT JUN 18, 2025
Clear 70°F
Feels Like:	70°F
Dewpoint:	68°F
Rel. Hum.:	93%
Visibility:	10 miles
Wind:	W at 6 mph
Pressure:	29.89 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

62026 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	SOUTHERN ILLINOIS UNIVERSITY, IL 62026 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TONIGHT
Partly cloudy. A slight chance of showers and thunderstorms late this evening. Near steady temperature around 70. West winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 20 percent.

JUNETEENTH
Sunny. Highs in the mid 80s. Northwest winds 5 to 10 mph.

THURSDAY NIGHT
Mostly clear. Lows in the upper 60s. Southwest winds around 5 mph.

FRIDAY
Sunny. Highs around 90. South winds 5 to 10 mph with gusts up to 20 mph.

FRIDAY NIGHT
Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph.

SATURDAY
Sunny, hot with highs in the mid 90s. Heat index values up to 105.

SATURDAY NIGHT
Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening.

SUNDAY
Sunny, hot with highs in the mid 90s. Heat index values up to 105.

SUNDAY NIGHT THROUGH MONDAY NIGHT
Mostly clear. Hot. Lows in the mid 70s. Highs in the mid 90s. Heat index values up to 105.

TUESDAY
Sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100.

TUESDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent.

WEDNESDAY
Mostly sunny with a slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100.

62026 WEATHER SATELLITE LOOPS

Visible Weather Satellite
SOUTHERN ILLINOIS UNIVERSITY, IL 62026

Infrared Weather Satellite
SOUTHERN ILLINOIS UNIVERSITY, IL 62026

62026 WEATHER RADAR LOOP

NEXRAD Weather Radar
SOUTHERN ILLINOIS UNIVERSITY, IL 62026

MOS COMPUTER WEATHER FORECAST

ALTON, IL 3 hourly weather forecast

weather forecast created 6:00 AM MDT 6/18/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
18 JUN 2025

1 PM

77°

79°

Mostly Cloudy

54%
RAIN
1–2 in

0% Thunder
( 54% severe)

WSW 17

74%

68°

High 80°

4 PM

79°

81°

Mostly Cloudy

WSW 14

69%

68°

Mostly Cloudy

Rain Likely

7 PM

77°

79°

Mostly Cloudy

37%
RAIN
***

0% Thunder
( 24% severe)

WSW 12

74%

68°

10 PM

72°

72°

Partly Cloudy

WSW 7

87%

68°

Thursday
19 JUN 2025

1 AM

69°

69°

Partly Cloudy

7%

0% Thunder
( 10% severe)

WSW 5

97%

68°

Low 66°

4 AM

67°

67°

Mostly Cloudy

W 5

100%

67°

High 83°

7 AM

67°

67°

Partly Cloudy

2%

0% Thunder
( 11% severe)

WNW 5

97%

66°

Partly Cloudy

10 AM

74°

74°

Partly Cloudy

NW 7

76%

66°

1 PM

79°

81°

Partly Cloudy

1%

0% Thunder
( 16% severe)

NW 8

62%

65°

4 PM

83°

84°

Clear

NW 6

53%

64°

7 PM

82°

84°

Partly Cloudy

0%

0% Thunder
( 6% severe)

NNW 3

55%

64°

10 PM

72°

72°

Clear

S 1

76%

64°

Friday
20 JUN 2025

1 AM

69°

69°

Partly Cloudy

0%

0% Thunder
( 1% severe)

S 2

87%

65°

Low 66°

4 AM

67°

67°

Clear

S 2

93%

65°

High 88°

7 AM

68°

68°

Partly Cloudy

0%

0% Thunder
( 5% severe)

S 3

90%

65°

Partly Cloudy

10 AM

79°

81°

Clear

S 8

69%

68°

1 PM

85°

88°

Partly Cloudy

0%

0% Thunder
( 13% severe)

S 10

57%

68°

4 PM

87°

90°

Partly Cloudy

S 12

53%

68°

7 PM

86°

90°

Partly Cloudy

S 12

57%

69°


ALTON, IL extended weather forecast
Saturday 21 JUN 2025	Sunday 22 JUN 2025	Monday 23 JUN 2025	Tuesday 24 JUN 2025	Wednesday 25 JUN 2025
Low 72°	Low 71°	Low 71°	Low 71°	Low 69°
High 94°	High 94°	High 92°	High 91°	High 89°

Partly Cloudy 12% Rain	Partly Cloudy 18% Rain	Partly Cloudy 23% Rain	Partly Cloudy 31% Rain	Partly Cloudy 35% Rain

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