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Current weather in Alton is broken clouds.

Where can I find the hourly weather forecast for Alton?

This page shows hourly weather forecast for Alton, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Alton updated regularly?

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

Now · 6:56 AM

Alton Weather & Hourly Forecast

United States · Missouri · 65606

66°F

Mostly cloudy

Feels like: 68°F

💧 Humidity 94% 🌡 Pressure 30.06 inHg 💨 Wind 6 mph 👁 Visibility 7.1 mi ☁ Clouds 84% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:52 AM 🌇 Sunset 7:03 PM

Hourly Forecast for Alton

Today

7:00 AM

Mostly cloudy

66° 💧 0.184 in 💨 6 mph H 94%30.06 inHg

10:00 AM

Light rain

67° 💧 0.083 in 💨 7 mph H 96%30.12 inHg

1:00 PM

Overcast

75° 💧 0.001 in 💨 7 mph H 70%30.12 inHg

4:00 PM

Mostly sunny

79° 💧 None 💨 7 mph H 58%30.06 inHg

7:00 PM

Mostly sunny

74° 💧 None 💨 6 mph H 69%30.06 inHg

10:00 PM

Clear night

68° 💧 None 💨 9 mph H 74%30.15 inHg

Tomorrow

1:00 AM

Clear night

64° 💧 None 💨 5 mph H 83%30.18 inHg

4:00 AM

Clear night

61° 💧 0.000 in 💨 5 mph H 90%30.18 inHg

7:00 AM

Sunny

60° 💧 None 💨 6 mph H 89%30.21 inHg

10:00 AM

Sunny

69° 💧 None 💨 7 mph H 67%30.24 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 8 mph H 47%30.21 inHg

4:00 PM

Sunny

78° 💧 None 💨 8 mph H 44%30.15 inHg

7:00 PM

Sunny

70° 💧 None 💨 5 mph H 60%30.15 inHg

10:00 PM

Clear night

65° 💧 None 💨 8 mph H 69%30.21 inHg

Thursday

1:00 AM

Clear night

61° 💧 None 💨 5 mph H 82%30.21 inHg

4:00 AM

Clear night

59° 💧 None 💨 5 mph H 88%30.21 inHg

Today

7:00 AM

Mostly cloudy

66° 💧 0.001 in 💨 6 mph H 94%30.06 inHg

8:00 AM

Thunderstorms

66° 💧 0.116 in 💨 7 mph H 96%30.09 inHg

9:00 AM

Light rain

67° 💧 0.067 in 💨 7 mph H 95%30.12 inHg

10:00 AM

Light rain

67° 💧 0.080 in 💨 7 mph H 96%30.12 inHg

11:00 AM

Partly cloudy

70° 💧 0.002 in 💨 8 mph H 86%30.15 inHg

12:00 PM

Overcast

73° 💧 0.001 in 💨 6 mph H 75%30.12 inHg

1:00 PM

Overcast

75° 💧 0.001 in 💨 7 mph H 70%30.12 inHg

2:00 PM

Overcast

76° 💧 0.000 in 💨 7 mph H 66%30.09 inHg

3:00 PM

Mostly sunny

78° 💧 None 💨 7 mph H 61%30.06 inHg

4:00 PM

Mostly sunny

79° 💧 None 💨 7 mph H 58%30.06 inHg

5:00 PM

Sunny

79° 💧 None 💨 7 mph H 58%30.03 inHg

6:00 PM

Mostly sunny

77° 💧 None 💨 6 mph H 62%30.06 inHg

7:00 PM

Mostly sunny

74° 💧 None 💨 6 mph H 69%30.06 inHg

8:00 PM

Clear night

72° 💧 None 💨 9 mph H 70%30.09 inHg

9:00 PM

Clear night

70° 💧 None 💨 9 mph H 72%30.12 inHg

10:00 PM

Clear night

68° 💧 None 💨 9 mph H 74%30.15 inHg

11:00 PM

Clear night

67° 💧 None 💨 8 mph H 77%30.15 inHg

Tomorrow

12:00 AM

Clear night

65° 💧 None 💨 6 mph H 79%30.18 inHg

1:00 AM

Clear night

64° 💧 None 💨 5 mph H 83%30.18 inHg

2:00 AM

Clear night

63° 💧 None 💨 4 mph H 87%30.18 inHg

3:00 AM

Clear night

62° 💧 None 💨 5 mph H 89%30.18 inHg

4:00 AM

Clear night

61° 💧 None 💨 5 mph H 90%30.18 inHg

5:00 AM

Clear night

61° 💧 0.000 in 💨 5 mph H 89%30.18 inHg

6:00 AM

Clear night

61° 💧 None 💨 6 mph H 88%30.21 inHg

7:00 AM

Sunny

60° 💧 None 💨 6 mph H 89%30.21 inHg

8:00 AM

Sunny

62° 💧 None 💨 6 mph H 84%30.24 inHg

9:00 AM

Sunny

66° 💧 None 💨 7 mph H 76%30.24 inHg

10:00 AM

Sunny

69° 💧 None 💨 7 mph H 67%30.24 inHg

11:00 AM

Sunny

71° 💧 None 💨 7 mph H 62%30.24 inHg

12:00 PM

Partly cloudy

75° 💧 None 💨 8 mph H 53%30.24 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 8 mph H 47%30.21 inHg

2:00 PM

Sunny

77° 💧 None 💨 8 mph H 46%30.18 inHg

3:00 PM

Mostly sunny

78° 💧 None 💨 8 mph H 45%30.15 inHg

4:00 PM

Sunny

78° 💧 None 💨 8 mph H 44%30.15 inHg

5:00 PM

Sunny

77° 💧 None 💨 9 mph H 45%30.15 inHg

6:00 PM

Sunny

75° 💧 None 💨 6 mph H 50%30.15 inHg

7:00 PM

Sunny

70° 💧 None 💨 5 mph H 60%30.15 inHg

8:00 PM

Clear night

68° 💧 None 💨 7 mph H 62%30.18 inHg

9:00 PM

Clear night

67° 💧 None 💨 8 mph H 65%30.21 inHg

10:00 PM

Clear night

65° 💧 None 💨 8 mph H 69%30.21 inHg

11:00 PM

Clear night

63° 💧 None 💨 6 mph H 74%30.24 inHg

Thursday

12:00 AM

Clear night

62° 💧 None 💨 5 mph H 79%30.21 inHg

1:00 AM

Clear night

61° 💧 None 💨 5 mph H 82%30.21 inHg

2:00 AM

Clear night

60° 💧 None 💨 6 mph H 83%30.21 inHg

3:00 AM

Clear night

60° 💧 None 💨 6 mph H 85%30.21 inHg

4:00 AM

Clear night

59° 💧 None 💨 5 mph H 88%30.21 inHg

5:00 AM

Clear night

59° 💧 None 💨 4 mph H 91%30.21 inHg

6:00 AM

Mostly clear night

58° 💧 None 💨 5 mph H 93%30.24 inHg

7:00 AM

Sunny

58° 💧 None 💨 5 mph H 94%30.24 inHg

8:00 AM

Sunny

61° 💧 None 💨 5 mph H 89%30.24 inHg

9:00 AM

Sunny

65° 💧 None 💨 5 mph H 78%30.27 inHg

10:00 AM

Partly cloudy

68° 💧 None 💨 7 mph H 66%30.27 inHg

11:00 AM

Partly cloudy

70° 💧 None 💨 6 mph H 61%30.24 inHg

12:00 PM

Mostly sunny

73° 💧 None 💨 6 mph H 55%30.24 inHg

1:00 PM

Sunny

74° 💧 None 💨 5 mph H 55%30.21 inHg

2:00 PM

Sunny

75° 💧 None 💨 5 mph H 53%30.18 inHg

3:00 PM

Mostly sunny

76° 💧 None 💨 5 mph H 52%30.15 inHg

4:00 PM

Partly cloudy

77° 💧 None 💨 5 mph H 51%30.15 inHg

5:00 PM

Mostly cloudy

77° 💧 None 💨 5 mph H 52%30.15 inHg

6:00 PM

Mostly cloudy

75° 💧 None 💨 6 mph H 55%30.15 inHg

7:00 PM

Partly cloudy

71° 💧 None 💨 6 mph H 64%30.15 inHg

10:00 PM

Partly cloudy night

64° 💧 None 💨 5 mph H 79%30.18 inHg

Friday

1:00 AM

Mostly clear night

62° 💧 None 💨 5 mph H 82%30.18 inHg

4:00 AM

Clear night

60° 💧 None 💨 4 mph H 87%30.18 inHg

7:00 AM

Mostly cloudy

59° 💧 None 💨 4 mph H 91%30.21 inHg

10:00 AM

Mostly sunny

70° 💧 None 💨 5 mph H 72%30.21 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 53%30.18 inHg

4:00 PM

Partly cloudy

78° 💧 None 💨 5 mph H 51%30.12 inHg

7:00 PM

Clear night

72° 💧 None 💨 6 mph H 65%30.09 inHg

10:00 PM

Mostly clear night

67° 💧 None 💨 6 mph H 72%30.15 inHg

Saturday

1:00 AM

Mostly cloudy night

65° 💧 None 💨 6 mph H 79%30.12 inHg

4:00 AM

Partly cloudy night

62° 💧 None 💨 4 mph H 83%30.09 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 4 mph H 85%30.12 inHg

10:00 AM

Overcast

70° 💧 None 💨 3 mph H 62%30.15 inHg

1:00 PM

Overcast

77° 💧 None 💨 2 mph H 52%30.12 inHg

4:00 PM

Overcast

76° 💧 None 💨 3 mph H 56%30.03 inHg

7:00 PM

Partly cloudy night

72° 💧 None 💨 3 mph H 66%30.03 inHg

10:00 PM

Clear night

67° 💧 None 💨 6 mph H 71%30.06 inHg

Sunday

1:00 AM

Clear night

63° 💧 None 💨 4 mph H 76%30.03 inHg

4:00 AM

Mostly clear night

62° 💧 None 💨 3 mph H 77%30.03 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 2 mph H 79%30.03 inHg

10:00 AM

Partly cloudy

71° 💧 None 💨 1 mph H 57%30.06 inHg

1:00 PM

Partly cloudy

80° 💧 None 💨 1 mph H 47%30.00 inHg

4:00 PM

Sunny

83° 💧 None 💨 1 mph H 46%29.91 inHg

7:00 PM

Partly cloudy night

76° 💧 None 💨 1 mph H 65%29.91 inHg

Monday

1:00 AM

Mostly clear night

66° 💧 None 💨 5 mph H 62%29.94 inHg

7:00 AM

Mostly sunny

61° 💧 None 💨 3 mph H 79%29.97 inHg

1:00 PM

Sunny

81° 💧 None 💨 3 mph H 46%29.91 inHg

7:00 PM

Clear night

75° 💧 None 💨 5 mph H 56%29.85 inHg

Tuesday

1:00 AM

Partly cloudy night

67° 💧 None 💨 5 mph H 67%29.88 inHg

7:00 AM

Mostly cloudy

62° 💧 None 💨 5 mph H 59%29.91 inHg

1:00 PM

Partly cloudy

83° 💧 None 💨 7 mph H 33%29.88 inHg

7:00 PM

Mostly cloudy night

77° 💧 None 💨 7 mph H 45%29.83 inHg

Wednesday

1:00 AM

Overcast night

70° 💧 None 💨 8 mph H 43%29.88 inHg

7:00 AM

Mostly cloudy

64° 💧 None 💨 6 mph H 42%29.88 inHg

1:00 PM

Overcast

84° 💧 None 💨 6 mph H 30%29.88 inHg

7:00 PM

Overcast night

76° 💧 None 💨 2 mph H 66%29.85 inHg

Thursday

1:00 AM

Overcast night

71° 💧 None 💨 4 mph H 58%29.91 inHg

7:00 AM

Overcast

68° 💧 None 💨 4 mph H 44%29.94 inHg

1:00 PM

Overcast

84° 💧 None 💨 7 mph H 37%29.97 inHg

7:00 PM

Overcast night

78° 💧 None 💨 4 mph H 50%29.94 inHg

Friday

1:00 AM

Overcast night

76° 💧 None 💨 6 mph H 49%30.00 inHg

7:00 AM

Overcast night

73° 💧 None 💨 4 mph H 50%30.03 inHg

1:00 PM

Mostly cloudy

82° 💧 None 💨 10 mph H 49%30.03 inHg

7:00 PM

Mostly cloudy night

80° 💧 None 💨 8 mph H 51%29.97 inHg

Saturday

1:00 AM

Overcast night

72° 💧 None 💨 6 mph H 79%30.00 inHg

7:00 AM

Light rain

69° 💧 None 💨 10 mph H 97%29.97 inHg

1:00 PM

Light rain

69° 💧 None 💨 10 mph H 96%30.00 inHg

7:00 PM

Overcast night

71° 💧 None 💨 7 mph H 99%29.94 inHg

Sunday

1:00 AM

Overcast night

71° 💧 None 💨 4 mph H 99%29.94 inHg

7:00 AM

Light rain

71° 💧 None 💨 3 mph H 99%29.94 inHg

1:00 PM

Light rain

79° 💧 None 💨 4 mph H 78%29.94 inHg

7:00 PM

Light rain

72° 💧 None 💨 3 mph H 99%29.94 inHg

Monday

1:00 AM

Overcast night

69° 💧 None 💨 4 mph H 99%30.00 inHg

7:00 AM

Overcast night

64° 💧 None 💨 9 mph H 92%30.06 inHg

1:00 PM

Overcast

69° 💧 None 💨 8 mph H 76%30.06 inHg

7:00 PM

Overcast night

68° 💧 None 💨 8 mph H 82%30.03 inHg

Tuesday

1:00 AM

Overcast night

65° 💧 None 💨 6 mph H 74%30.03 inHg

7:00 AM

Overcast night

62° 💧 None 💨 8 mph H 84%30.03 inHg

1:00 PM

Mostly cloudy

70° 💧 None 💨 4 mph H 64%30.06 inHg

7:00 PM

Partly cloudy night

67° 💧 None 💨 7 mph H 61%30.03 inHg

In Alton and, more broadly, across the state of Missouri: This morning will start with mostly cloudy skies and mild temperatures around 67 degrees. Winds will be light from the northeast at up to 9 mph, with occasional gusts reaching 18 mph. As the day progresses, temperatures are expected to warm into the low 80s, reaching around 83. Rain may develop, with some areas experiencing about 0.08 inches of accumulation. The highest chance of rain is about 85%, so keep an umbrella handy if you're heading outdoors. Winds will remain light during the afternoon, continuing from the northeast at similar speeds. Overall, it looks like a warm, mostly cloudy day with a good likelihood of some rain, especially later in the day.

15-Day Weather Outlook for Alton

TomorrowTomorrow

Partly cloudy 78°/60° 💧 None 💨 9 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 77°/58° 💧 0.564 in 💨 7 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 78°/59° 💧 None 💨 6 mph

Saturday, Sep 26Sat Sep 26

Mostly cloudy 77°/61° 💧 None 💨 6 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 83°/61° 💧 0.007 in 💨 4 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 81°/61° 💧 0.001 in 💨 5 mph

Tuesday, Sep 29Tue Sep 29

Partly cloudy 83°/62° 💧 None 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Overcast 84°/64° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Overcast 84°/68° 💧 None 💨 7 mph

Friday, Oct 2Fri Oct 2

Overcast 82°/73° 💧 None 💨 10 mph

Saturday, Oct 3Sat Oct 3

Light rain 72°/69° 💧 0.248 in 💨 10 mph

Sunday, Oct 4Sun Oct 4

Light rain 79°/71° 💧 0.377 in 💨 4 mph

Monday, Oct 5Mon Oct 5

Overcast 69°/64° 💧 0.077 in 💨 9 mph

Tuesday, Oct 6Tue Oct 6

Overcast 70°/62° 💧 0.046 in 💨 8 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Alton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Alton

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 7:00 AM

PM2.5 Fine particles Good 4,0µg/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 4,6µg/m³

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

O₃ Ozone Good 31,8µg/m³

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

NO₂ Nitrogen dioxide Good 1,7µg/m³

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

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in 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 6,8High 😊Good

Tomorrow UV 7,4High 🙂Fair

Thursday UV 7,3High 🙂Fair

Friday UV 6,1High 🙂Fair

Saturday UV 6,0High 🙂Fair

Sunday UV 5,0Moderate —Unavailable

Monday UV 7,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,3 9:00 AMUV 1,2 10:00 AMUV 2,8 11:00 AMUV 4,6 12:00 PMUV 6,2 1:00 PMUV 6,8 2:00 PMUV 6,4 3:00 PMUV 5,0 4:00 PMUV 3,1 5:00 PMUV 1,4 6:00 PMUV 0,3

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.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

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 Alton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ALTON, MISSOURI

Tonight's Stargazing & Shooting Stars

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

98/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:29 PM–5:28 AM

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

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 68° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min74%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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.

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Forecast data for Alton were last refreshed today at 6:56 AM. The current forecast period extends through 24/09/2026 at 4:00 AM. 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.