PONTOON BEACH, IL 62040 Weather Forecast & Current Conditions

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62040 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALTON, IL Current Weather
4:50 PM CDT MAY 16, 2026
Clear 72°F
Feels Like:	72°F
Dewpoint:	66°F
Rel. Hum.:	81%
Visibility:	10 miles
Wind:	SE at 9 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)

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

TONIGHT
Mostly cloudy. A chance of showers and thunderstorms this evening. Lows in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 30 percent.

SUNDAY
Sunny. Highs in the upper 80s. South winds 15 to 20 mph with gusts up to 30 mph.

SUNDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 70. South winds 15 to 20 mph with gusts up to 30 mph.

MONDAY
Partly sunny with a slight chance of showers and thunderstorms in the morning, then mostly cloudy with showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.

MONDAY NIGHT
Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

TUESDAY
Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. Highs in the upper 80s. Chance of rain 90 percent.

TUESDAY NIGHT
Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Cooler with lows around 60. Chance of rain 90 percent.

WEDNESDAY
Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms in the morning. A slight chance of showers. Much cooler with highs in the lower 70s. Chance of rain 20 percent.

WEDNESDAY NIGHT
Mostly cloudy with a 20 percent chance of showers. Lows in the lower 50s.

THURSDAY
Partly sunny. Highs in the lower 70s.

THURSDAY NIGHT THROUGH FRIDAY NIGHT
Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. Highs in the mid 70s.

SATURDAY
Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20 percent.

62040 WEATHER SATELLITE LOOPS

Visible Weather Satellite
PONTOON BEACH, IL 62040

Infrared Weather Satellite
PONTOON BEACH, IL 62040

62040 WEATHER RADAR LOOP

NEXRAD Weather Radar
PONTOON BEACH, IL 62040

MOS COMPUTER WEATHER FORECAST

ALTON, IL 3 hourly weather forecast

weather forecast created 6:00 AM MDT 5/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
16 MAY 2026

1 PM

78°

80°

Mostly Cloudy

33%
RAIN
.25–.5 in

0% Thunder
( 34% severe)

SW 10

62%

64°

High 82°

4 PM

81°

83°

Mostly Cloudy

S 10

56%

64°

Mostly Cloudy

Chance of Rain

7 PM

80°

82°

Mostly Cloudy

8%

0% Thunder
( 18% severe)

S 10

58%

64°

10 PM

73°

73°

Partly Cloudy

SE 10

68%

62°

Sunday
17 MAY 2026

1 AM

70°

70°

Mostly Cloudy

5%

0% Thunder
( 12% severe)

SE 8

76%

62°

Low 64°

4 AM

68°

68°

Mostly Cloudy

SSE 9

78%

61°

High 88°

7 AM

68°

68°

Partly Cloudy

1%

0% Thunder
( 4% severe)

SSE 12

78%

61°

Partly Cloudy

Breezy

10 AM

78°

80°

Partly Cloudy

S 16

60%

63°

1 PM

85°

86°

Clear

1%

0% Thunder
( 11% severe)

S 20

48%

63°

4 PM

88°

88°

Clear

S 22

40%

61°

7 PM

86°

86°

Clear

0%

0% Thunder
( 11% severe)

S 18

43%

61°

10 PM

78°

79°

Clear

SSE 15

52%

59°

Monday
18 MAY 2026

1 AM

75°

75°

Partly Cloudy

3%

0% Thunder
( 14% severe)

S 14

60%

60°

Low 69°

4 AM

72°

72°

Mostly Cloudy

S 14

68%

61°

High 87°

7 AM

73°

73°

Mostly Cloudy

26%
RAIN
<.01 in

0% Thunder
( 19% severe)

S 16

73%

64°

Mostly Cloudy

Chance of Rain

Breezy

10 AM

80°

82°

Mostly Cloudy

S 18

65%

67°

1 PM

84°

87°

Mostly Cloudy

47%
RAIN
***

0% Thunder
( 55% severe)

S 20

57%

67°

4 PM

86°

88°

Mostly Cloudy

S 21

51%

66°

7 PM

84°

86°

Mostly Cloudy

S 20

55%

66°


ALTON, IL extended weather forecast
Tuesday 19 MAY 2026	Wednesday 20 MAY 2026	Thursday 21 MAY 2026	Friday 22 MAY 2026	Saturday 23 MAY 2026
Low 68°	Low 60°	Low 51°	Low 48°	Low 53°
High 79°	High 65°	High 67°	High 72°	High 78°

Overcast 82% Rain	Overcast 75% Rain	Overcast 43% Rain	Partly Cloudy 25% Rain	Partly Cloudy 15% Rain

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