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Current weather in East Alton is overcast clouds.

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Weather data for East Alton is updated regularly with the latest available observations and forecasts.

Now · 5:03 PM

East Alton Weather & Hourly Forecast

United States · Illinois · 62024

89°F

Overcast

Feels like: 94°F

💧 Humidity 59% 🌡 Pressure 30.15 inHg 💨 Wind 6 mph 👁 Visibility 9.8 mi ☁ Clouds 95% ☀️ UV index 1.4 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for East Alton

Today

6:00 PM

Overcast

85° 💧 0.000 in 💨 7 mph H 70%30.15 inHg

9:00 PM

Mostly clear night

81° 💧 None 💨 4 mph H 83%30.21 inHg

Tomorrow

12:00 AM

Clear night

79° 💧 None 💨 3 mph H 89%30.21 inHg

3:00 AM

Clear night

78° 💧 None 💨 6 mph H 86%30.18 inHg

6:00 AM

Clear night

77° 💧 None 💨 5 mph H 78%30.18 inHg

9:00 AM

Sunny

83° 💧 None 💨 5 mph H 66%30.21 inHg

12:00 PM

Sunny

92° 💧 0.002 in 💨 7 mph H 52%30.18 inHg

3:00 PM

Strong thunderstorm

95° 💧 0.008 in 💨 5 mph H 45%30.12 inHg

6:00 PM

Light rain

87° 💧 0.005 in 💨 3 mph H 63%30.12 inHg

9:00 PM

Clear night

82° 💧 None 💨 1 mph H 80%30.12 inHg

Friday

12:00 AM

Clear night

80° 💧 None 💨 1 mph H 83%30.15 inHg

3:00 AM

Clear night

78° 💧 None 💨 5 mph H 89%30.12 inHg

6:00 AM

Clear night

76° 💧 None 💨 6 mph H 96%30.15 inHg

9:00 AM

Mostly sunny

81° 💧 None 💨 7 mph H 80%30.15 inHg

12:00 PM

Strong thunderstorm

89° 💧 0.003 in 💨 3 mph H 60%30.12 inHg

3:00 PM

Light thunderstorms

92° 💧 0.029 in 💨 2 mph H 53%30.06 inHg

Today

6:00 PM

Overcast

85° 💧 0.000 in 💨 7 mph H 70%30.15 inHg

7:00 PM

Mostly cloudy

82° 💧 None 💨 3 mph H 78%30.18 inHg

8:00 PM

Mostly clear night

81° 💧 None 💨 3 mph H 81%30.18 inHg

9:00 PM

Mostly clear night

81° 💧 None 💨 4 mph H 83%30.21 inHg

10:00 PM

Clear night

80° 💧 None 💨 4 mph H 85%30.21 inHg

11:00 PM

Clear night

79° 💧 None 💨 3 mph H 88%30.21 inHg

Tomorrow

12:00 AM

Clear night

79° 💧 None 💨 3 mph H 89%30.21 inHg

1:00 AM

Mostly clear night

79° 💧 None 💨 4 mph H 90%30.18 inHg

2:00 AM

Clear night

79° 💧 None 💨 5 mph H 88%30.18 inHg

3:00 AM

Clear night

78° 💧 None 💨 6 mph H 86%30.18 inHg

4:00 AM

Clear night

78° 💧 None 💨 6 mph H 82%30.18 inHg

5:00 AM

Clear night

78° 💧 None 💨 5 mph H 80%30.18 inHg

6:00 AM

Clear night

77° 💧 None 💨 5 mph H 78%30.18 inHg

7:00 AM

Sunny

77° 💧 None 💨 5 mph H 77%30.21 inHg

8:00 AM

Sunny

80° 💧 None 💨 6 mph H 73%30.21 inHg

9:00 AM

Sunny

83° 💧 None 💨 5 mph H 66%30.21 inHg

10:00 AM

Sunny

86° 💧 None 💨 5 mph H 60%30.21 inHg

11:00 AM

Sunny

89° 💧 None 💨 6 mph H 55%30.18 inHg

12:00 PM

Sunny

92° 💧 None 💨 7 mph H 52%30.18 inHg

1:00 PM

Strong thunderstorm

93° 💧 0.000 in 💨 6 mph H 49%30.15 inHg

2:00 PM

Strong thunderstorm

94° 💧 0.001 in 💨 6 mph H 47%30.15 inHg

3:00 PM

Strong thunderstorm

95° 💧 0.001 in 💨 5 mph H 45%30.12 inHg

4:00 PM

Sunny

95° 💧 0.000 in 💨 5 mph H 44%30.12 inHg

5:00 PM

Light rain

91° 💧 0.006 in 💨 9 mph H 53%30.09 inHg

6:00 PM

Light rain

87° 💧 0.005 in 💨 3 mph H 63%30.12 inHg

7:00 PM

Sunny

85° 💧 0.000 in 💨 1 mph H 73%30.12 inHg

8:00 PM

Clear night

83° 💧 None 💨 0 mph H 78%30.12 inHg

9:00 PM

Clear night

82° 💧 None 💨 1 mph H 80%30.12 inHg

10:00 PM

Clear night

81° 💧 None 💨 0 mph H 81%30.15 inHg

11:00 PM

Clear night

81° 💧 None 💨 1 mph H 81%30.15 inHg

Friday

12:00 AM

Clear night

80° 💧 None 💨 1 mph H 83%30.15 inHg

1:00 AM

Clear night

79° 💧 None 💨 1 mph H 85%30.15 inHg

2:00 AM

Clear night

78° 💧 None 💨 5 mph H 87%30.12 inHg

3:00 AM

Clear night

78° 💧 None 💨 5 mph H 89%30.12 inHg

4:00 AM

Clear night

77° 💧 None 💨 5 mph H 92%30.12 inHg

5:00 AM

Clear night

76° 💧 None 💨 5 mph H 95%30.12 inHg

6:00 AM

Clear night

76° 💧 None 💨 6 mph H 96%30.15 inHg

7:00 AM

Sunny

75° 💧 None 💨 6 mph H 96%30.15 inHg

8:00 AM

Sunny

77° 💧 None 💨 5 mph H 90%30.15 inHg

9:00 AM

Mostly sunny

81° 💧 None 💨 7 mph H 80%30.15 inHg

10:00 AM

Partly cloudy

84° 💧 None 💨 5 mph H 71%30.15 inHg

11:00 AM

Sunny

87° 💧 None 💨 3 mph H 65%30.15 inHg

12:00 PM

Strong thunderstorm

89° 💧 0.001 in 💨 3 mph H 60%30.12 inHg

1:00 PM

Strong thunderstorm

91° 💧 0.001 in 💨 3 mph H 57%30.09 inHg

2:00 PM

Mostly sunny

92° 💧 0.001 in 💨 2 mph H 55%30.06 inHg

3:00 PM

Light thunderstorms

92° 💧 0.003 in 💨 2 mph H 53%30.06 inHg

4:00 PM

Light thunderstorms

92° 💧 0.004 in 💨 2 mph H 52%30.03 inHg

5:00 PM

Light thunderstorms

87° 💧 0.021 in 💨 5 mph H 64%30.03 inHg

6:00 PM

Light thunderstorms

84° 💧 0.020 in 💨 3 mph H 71%30.03 inHg

7:00 PM

Mostly sunny

83° 💧 0.002 in 💨 4 mph H 75%30.00 inHg

8:00 PM

Clear night

82° 💧 None 💨 6 mph H 77%30.00 inHg

9:00 PM

Clear night

81° 💧 None 💨 7 mph H 77%30.00 inHg

10:00 PM

Clear night

81° 💧 None 💨 7 mph H 80%30.03 inHg

11:00 PM

Clear night

80° 💧 None 💨 7 mph H 82%30.00 inHg

Saturday

12:00 AM

Clear night

79° 💧 None 💨 8 mph H 84%30.00 inHg

1:00 AM

Clear night

79° 💧 None 💨 7 mph H 85%30.00 inHg

2:00 AM

Mostly clear night

78° 💧 None 💨 8 mph H 85%29.97 inHg

3:00 AM

Mostly clear night

77° 💧 None 💨 8 mph H 85%29.97 inHg

4:00 AM

Clear night

77° 💧 None 💨 7 mph H 86%29.97 inHg

5:00 AM

Light thunderstorms

74° 💧 0.044 in 💨 15 mph H 92%30.03 inHg

6:00 AM

Light thunderstorms

73° 💧 0.072 in 💨 10 mph H 97%29.97 inHg

7:00 AM

Sunny

74° 💧 0.001 in 💨 7 mph H 95%29.94 inHg

10:00 AM

Mostly sunny

82° 💧 None 💨 6 mph H 74%29.97 inHg

1:00 PM

Mostly cloudy

92° 💧 None 💨 7 mph H 48%29.91 inHg

4:00 PM

Overcast

92° 💧 None 💨 6 mph H 40%29.85 inHg

7:00 PM

Partly cloudy

86° 💧 None 💨 1 mph H 57%29.83 inHg

10:00 PM

Partly cloudy night

81° 💧 None 💨 3 mph H 63%29.83 inHg

Sunday

1:00 AM

Partly cloudy night

79° 💧 None 💨 4 mph H 68%29.83 inHg

4:00 AM

Mostly clear night

75° 💧 None 💨 7 mph H 79%29.85 inHg

7:00 AM

Partly cloudy

72° 💧 None 💨 5 mph H 96%29.88 inHg

10:00 AM

Mostly cloudy

78° 💧 None 💨 2 mph H 84%29.88 inHg

1:00 PM

Mostly cloudy

87° 💧 None 💨 4 mph H 57%29.88 inHg

4:00 PM

Partly cloudy

88° 💧 None 💨 6 mph H 57%29.85 inHg

7:00 PM

Mostly sunny

80° 💧 None 💨 8 mph H 75%29.85 inHg

10:00 PM

Mostly clear night

76° 💧 None 💨 10 mph H 86%29.91 inHg

Monday

1:00 AM

Partly cloudy night

72° 💧 None 💨 7 mph H 88%29.91 inHg

4:00 AM

Clear night

70° 💧 None 💨 6 mph H 91%29.88 inHg

7:00 AM

Light rain

68° 💧 None 💨 7 mph H 95%29.94 inHg

10:00 AM

Mostly cloudy

75° 💧 None 💨 3 mph H 82%29.94 inHg

1:00 PM

Mostly cloudy

81° 💧 None 💨 7 mph H 70%29.94 inHg

4:00 PM

Moderate rain

73° 💧 None 💨 5 mph H 91%29.91 inHg

7:00 PM

Overcast night

70° 💧 None 💨 7 mph H 96%29.94 inHg

10:00 PM

Overcast night

67° 💧 None 💨 10 mph H 89%30.00 inHg

Tuesday

1:00 AM

Overcast night

65° 💧 None 💨 8 mph H 81%30.03 inHg

4:00 AM

Overcast night

64° 💧 None 💨 9 mph H 82%30.03 inHg

7:00 AM

Overcast

62° 💧 None 💨 9 mph H 80%30.06 inHg

1:00 PM

Overcast

65° 💧 None 💨 11 mph H 72%30.15 inHg

7:00 PM

Mostly clear night

65° 💧 None 💨 10 mph H 62%30.15 inHg

Wednesday

1:00 AM

Clear night

57° 💧 None 💨 9 mph H 78%30.21 inHg

7:00 AM

Sunny

53° 💧 None 💨 9 mph H 84%30.24 inHg

1:00 PM

Sunny

69° 💧 None 💨 9 mph H 54%30.24 inHg

7:00 PM

Mostly clear night

65° 💧 None 💨 7 mph H 62%30.21 inHg

Thursday

1:00 AM

Clear night

56° 💧 None 💨 8 mph H 82%30.21 inHg

7:00 AM

Sunny

53° 💧 None 💨 7 mph H 93%30.24 inHg

1:00 PM

Overcast

69° 💧 None 💨 10 mph H 58%30.21 inHg

7:00 PM

Overcast night

66° 💧 None 💨 7 mph H 68%30.18 inHg

Friday

1:00 AM

Overcast night

62° 💧 None 💨 5 mph H 82%30.21 inHg

7:00 AM

Overcast

60° 💧 None 💨 7 mph H 84%30.24 inHg

1:00 PM

Overcast

68° 💧 None 💨 9 mph H 60%30.24 inHg

7:00 PM

Partly cloudy night

67° 💧 None 💨 5 mph H 64%30.18 inHg

Saturday

1:00 AM

Clear night

60° 💧 None 💨 8 mph H 82%30.24 inHg

7:00 AM

Sunny

54° 💧 None 💨 7 mph H 92%30.27 inHg

1:00 PM

Sunny

72° 💧 None 💨 8 mph H 48%30.27 inHg

7:00 PM

Clear night

66° 💧 None 💨 7 mph H 58%30.21 inHg

Sunday

1:00 AM

Clear night

58° 💧 None 💨 8 mph H 79%30.21 inHg

7:00 AM

Sunny

52° 💧 None 💨 5 mph H 92%30.24 inHg

1:00 PM

Sunny

71° 💧 None 💨 5 mph H 46%30.18 inHg

7:00 PM

Clear night

64° 💧 None 💨 4 mph H 53%30.12 inHg

Monday

1:00 AM

Clear night

54° 💧 None 💨 5 mph H 70%30.15 inHg

7:00 AM

Sunny

50° 💧 None 💨 5 mph H 81%30.18 inHg

1:00 PM

Sunny

75° 💧 None 💨 5 mph H 32%30.15 inHg

7:00 PM

Clear night

66° 💧 None 💨 5 mph H 40%30.12 inHg

Tuesday

1:00 AM

Clear night

57° 💧 None 💨 6 mph H 57%30.15 inHg

7:00 AM

Sunny

52° 💧 None 💨 6 mph H 74%30.18 inHg

1:00 PM

Sunny

80° 💧 None 💨 4 mph H 25%30.15 inHg

7:00 PM

Clear night

71° 💧 None 💨 7 mph H 32%30.09 inHg

Wednesday

1:00 AM

Clear night

61° 💧 None 💨 6 mph H 51%30.09 inHg

7:00 AM

Sunny

56° 💧 None 💨 6 mph H 60%30.12 inHg

1:00 PM

Sunny

81° 💧 None 💨 6 mph H 26%30.12 inHg

7:00 PM

Clear night

72° 💧 None 💨 5 mph H 35%30.06 inHg

Thursday

1:00 AM

Mostly clear night

63° 💧 None 💨 5 mph H 52%30.12 inHg

7:00 AM

Overcast

62° 💧 None 💨 1 mph H 61%30.15 inHg

In East Alton and, more broadly, across the state of Illinois: The late afternoon will be mostly sunny with a few clouds drifting across the sky. Temperatures are expected to remain mild to warm, ranging from 75 to 84 degrees Fahrenheit. Winds will be light, coming from the west at around 6 mph, with occasional gusts up to 11 mph. No precipitation is forecasted for the evening, so it should remain dry throughout. As the night approaches, temperatures may gradually cool but will stay within a comfortable range. Overall, it looks like a pleasant evening with clear to partly cloudy skies and gentle breezes.

15-Day Weather Outlook for East Alton

TomorrowTomorrow

Strong thunderstorm 95°/77° 💧 None 💨 9 mph

Friday, Sep 18Fri Sep 18

Strong thunderstorm 92°/75° 💧 None 💨 7 mph

Saturday, Sep 19Sat Sep 19

Light thunderstorms 92°/73° 💧 0.303 in 💨 15 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 88°/72° 💧 0.056 in 💨 10 mph

Monday, Sep 21Mon Sep 21

Moderate rain 81°/67° 💧 0.455 in 💨 10 mph

Tuesday, Sep 22Tue Sep 22

Overcast 65°/62° 💧 0.008 in 💨 11 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 69°/53° 💧 None 💨 9 mph

Thursday, Sep 24Thu Sep 24

Overcast 69°/53° 💧 None 💨 10 mph

Friday, Sep 25Fri Sep 25

Overcast 68°/60° 💧 0.001 in 💨 9 mph

Saturday, Sep 26Sat Sep 26

Sunny 72°/54° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Sunny 71°/52° 💧 None 💨 8 mph

Monday, Sep 28Mon Sep 28

Sunny 75°/50° 💧 None 💨 5 mph

Tuesday, Sep 29Tue Sep 29

Sunny 80°/52° 💧 0.001 in 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Sunny 81°/56° 💧 None 💨 6 mph

Thursday, Oct 1Thu Oct 1

Mostly sunny 63°/62° 💧 None 💨 5 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in East Alton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for East Alton

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 6:00 PM

PM2.5 Fine particles Good 3,6µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 3,8µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 72,2µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in East Alton

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 7,0High 🙂Fair

Tomorrow UV 6,9High 🙂Fair

Friday UV 7,0High 🙂Fair

Saturday UV 6,3High 😐Moderate

Sunday UV 9,0Very high 🙂Fair

Monday UV 7,0High —Unavailable

Tuesday UV 7,0High —Unavailable

Hourly UV index today

6:00 PMUV 0,4 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for East Alton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · EAST ALTON, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:37 PM–5:13 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 31% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 85° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min81%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for East Alton were last refreshed today at 5:03 PM. The current forecast period extends through 18/09/2026 at 3:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.