What is the weather in Alton right now?

Current weather in Alton is scattered 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 · 12:41 AM

Alton Weather & Hourly Forecast

United States · Illinois · 62002

63°F

Partly cloudy night

Feels like: 60°F

💧 Humidity 72% 🌡 Pressure 30.21 inHg 💨 Wind 7 mph 👁 Visibility 19.3 mi ☁ Clouds 44% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:48 AM 🌇 Sunset 6:57 PM

Hourly Forecast for Alton

Today

1:00 AM

Partly cloudy night

63° 💧 None 💨 7 mph H 72%30.21 inHg

4:00 AM

Mostly cloudy night

61° 💧 None 💨 6 mph H 82%30.24 inHg

7:00 AM

Overcast

61° 💧 0.001 in 💨 6 mph H 85%30.27 inHg

10:00 AM

Overcast

65° 💧 0.002 in 💨 8 mph H 73%30.27 inHg

1:00 PM

Overcast

71° 💧 0.001 in 💨 8 mph H 57%30.24 inHg

4:00 PM

Overcast

70° 💧 0.001 in 💨 8 mph H 63%30.24 inHg

7:00 PM

Partly cloudy night

67° 💧 None 💨 7 mph H 71%30.24 inHg

10:00 PM

Overcast night

66° 💧 None 💨 7 mph H 73%30.27 inHg

Tomorrow

1:00 AM

Overcast night

64° 💧 None 💨 5 mph H 79%30.24 inHg

4:00 AM

Mostly cloudy night

62° 💧 None 💨 4 mph H 85%30.24 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 94%30.27 inHg

10:00 AM

Partly cloudy

67° 💧 0.002 in 💨 6 mph H 74%30.30 inHg

1:00 PM

Mostly cloudy

71° 💧 0.001 in 💨 3 mph H 64%30.24 inHg

4:00 PM

Mostly cloudy

73° 💧 None 💨 4 mph H 60%30.21 inHg

7:00 PM

Mostly cloudy night

69° 💧 None 💨 3 mph H 74%30.21 inHg

10:00 PM

Mostly cloudy night

66° 💧 None 💨 5 mph H 80%30.21 inHg

Today

1:00 AM

Partly cloudy night

63° 💧 None 💨 7 mph H 72%30.21 inHg

2:00 AM

Mostly clear night

61° 💧 None 💨 7 mph H 76%30.21 inHg

3:00 AM

Mostly cloudy night

60° 💧 None 💨 6 mph H 80%30.21 inHg

4:00 AM

Mostly cloudy night

61° 💧 None 💨 6 mph H 82%30.24 inHg

5:00 AM

Mostly cloudy night

61° 💧 None 💨 5 mph H 85%30.24 inHg

6:00 AM

Overcast night

61° 💧 None 💨 6 mph H 85%30.24 inHg

7:00 AM

Overcast

61° 💧 0.001 in 💨 6 mph H 85%30.27 inHg

8:00 AM

Overcast

62° 💧 0.001 in 💨 7 mph H 84%30.27 inHg

9:00 AM

Mostly cloudy

63° 💧 None 💨 7 mph H 80%30.27 inHg

10:00 AM

Overcast

65° 💧 None 💨 8 mph H 73%30.27 inHg

11:00 AM

Mostly cloudy

67° 💧 0.002 in 💨 8 mph H 70%30.27 inHg

12:00 PM

Partly cloudy

69° 💧 0.001 in 💨 7 mph H 63%30.27 inHg

1:00 PM

Overcast

71° 💧 0.001 in 💨 8 mph H 57%30.24 inHg

2:00 PM

Overcast

70° 💧 None 💨 9 mph H 58%30.24 inHg

3:00 PM

Overcast

70° 💧 None 💨 9 mph H 60%30.24 inHg

4:00 PM

Overcast

70° 💧 None 💨 8 mph H 63%30.24 inHg

5:00 PM

Overcast

69° 💧 0.001 in 💨 8 mph H 65%30.24 inHg

6:00 PM

Overcast

68° 💧 None 💨 8 mph H 68%30.24 inHg

7:00 PM

Partly cloudy night

67° 💧 None 💨 7 mph H 71%30.24 inHg

8:00 PM

Partly cloudy night

66° 💧 None 💨 7 mph H 74%30.24 inHg

9:00 PM

Overcast night

66° 💧 None 💨 6 mph H 74%30.24 inHg

10:00 PM

Overcast night

66° 💧 None 💨 7 mph H 73%30.27 inHg

11:00 PM

Overcast night

65° 💧 None 💨 7 mph H 75%30.27 inHg

Tomorrow

12:00 AM

Overcast night

65° 💧 None 💨 6 mph H 76%30.24 inHg

1:00 AM

Overcast night

64° 💧 None 💨 5 mph H 79%30.24 inHg

2:00 AM

Overcast night

64° 💧 None 💨 4 mph H 80%30.24 inHg

3:00 AM

Overcast night

63° 💧 None 💨 4 mph H 83%30.24 inHg

4:00 AM

Mostly cloudy night

62° 💧 None 💨 4 mph H 85%30.24 inHg

5:00 AM

Partly cloudy night

62° 💧 None 💨 4 mph H 87%30.24 inHg

6:00 AM

Mostly clear night

60° 💧 None 💨 5 mph H 91%30.24 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 94%30.27 inHg

8:00 AM

Sunny

61° 💧 None 💨 6 mph H 89%30.27 inHg

9:00 AM

Sunny

63° 💧 None 💨 6 mph H 82%30.27 inHg

10:00 AM

Partly cloudy

67° 💧 None 💨 6 mph H 74%30.30 inHg

11:00 AM

Overcast

69° 💧 0.001 in 💨 6 mph H 69%30.27 inHg

12:00 PM

Overcast

70° 💧 0.002 in 💨 4 mph H 67%30.27 inHg

1:00 PM

Mostly cloudy

71° 💧 None 💨 3 mph H 64%30.24 inHg

2:00 PM

Overcast

72° 💧 0.001 in 💨 3 mph H 60%30.24 inHg

3:00 PM

Overcast

73° 💧 None 💨 4 mph H 60%30.21 inHg

4:00 PM

Mostly cloudy

73° 💧 None 💨 4 mph H 60%30.21 inHg

5:00 PM

Partly cloudy

73° 💧 None 💨 4 mph H 60%30.21 inHg

6:00 PM

Mostly cloudy

72° 💧 None 💨 4 mph H 66%30.21 inHg

7:00 PM

Mostly cloudy night

69° 💧 None 💨 3 mph H 74%30.21 inHg

8:00 PM

Mostly cloudy night

68° 💧 None 💨 3 mph H 77%30.21 inHg

9:00 PM

Mostly clear night

67° 💧 None 💨 4 mph H 80%30.21 inHg

10:00 PM

Mostly cloudy night

66° 💧 None 💨 5 mph H 80%30.21 inHg

11:00 PM

Overcast night

67° 💧 None 💨 5 mph H 80%30.21 inHg

Friday

12:00 AM

Overcast night

67° 💧 None 💨 5 mph H 79%30.21 inHg

1:00 AM

Mostly cloudy night

66° 💧 None 💨 4 mph H 82%30.18 inHg

2:00 AM

Overcast night

64° 💧 None 💨 3 mph H 86%30.18 inHg

3:00 AM

Mostly cloudy night

64° 💧 None 💨 4 mph H 88%30.21 inHg

4:00 AM

Mostly cloudy night

63° 💧 None 💨 4 mph H 90%30.21 inHg

5:00 AM

Partly cloudy night

62° 💧 None 💨 4 mph H 92%30.21 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 4 mph H 93%30.21 inHg

7:00 AM

Mostly cloudy

62° 💧 None 💨 4 mph H 94%30.24 inHg

4:00 PM

Overcast

73° 💧 None 💨 5 mph H 60%30.18 inHg

7:00 PM

Mostly cloudy night

68° 💧 None 💨 9 mph H 70%30.15 inHg

10:00 PM

Partly cloudy night

64° 💧 None 💨 8 mph H 71%30.18 inHg

Saturday

1:00 AM

Mostly cloudy night

61° 💧 None 💨 6 mph H 69%30.15 inHg

4:00 AM

Overcast night

60° 💧 None 💨 5 mph H 73%30.12 inHg

7:00 AM

Overcast

61° 💧 None 💨 6 mph H 71%30.15 inHg

10:00 AM

Overcast

65° 💧 None 💨 6 mph H 65%30.18 inHg

1:00 PM

Overcast

69° 💧 None 💨 7 mph H 56%30.12 inHg

4:00 PM

Overcast

70° 💧 None 💨 7 mph H 53%30.06 inHg

7:00 PM

Mostly clear night

64° 💧 None 💨 7 mph H 62%30.03 inHg

10:00 PM

Mostly clear night

62° 💧 None 💨 7 mph H 70%30.06 inHg

Sunday

1:00 AM

Mostly cloudy night

58° 💧 None 💨 4 mph H 79%30.06 inHg

4:00 AM

Mostly cloudy night

58° 💧 None 💨 6 mph H 75%30.03 inHg

7:00 AM

Mostly sunny

57° 💧 None 💨 3 mph H 82%30.03 inHg

10:00 AM

Overcast

64° 💧 None 💨 4 mph H 68%30.03 inHg

1:00 PM

Partly cloudy

74° 💧 None 💨 4 mph H 46%29.97 inHg

4:00 PM

Mostly sunny

77° 💧 None 💨 3 mph H 42%29.91 inHg

7:00 PM

Clear night

70° 💧 None 💨 2 mph H 62%29.91 inHg

10:00 PM

Clear night

65° 💧 None 💨 4 mph H 64%29.91 inHg

Monday

1:00 AM

Clear night

62° 💧 None 💨 4 mph H 68%29.91 inHg

4:00 AM

Clear night

60° 💧 None 💨 4 mph H 74%29.91 inHg

7:00 AM

Mostly cloudy

60° 💧 None 💨 6 mph H 76%29.91 inHg

10:00 AM

Partly cloudy

70° 💧 None 💨 6 mph H 61%29.91 inHg

1:00 PM

Mostly cloudy

80° 💧 None 💨 7 mph H 42%29.85 inHg

7:00 PM

Clear night

79° 💧 None 💨 6 mph H 44%29.91 inHg

Tuesday

1:00 AM

Clear night

72° 💧 None 💨 6 mph H 60%29.85 inHg

7:00 AM

Overcast

66° 💧 None 💨 8 mph H 68%29.85 inHg

1:00 PM

Mostly cloudy

64° 💧 None 💨 8 mph H 77%29.85 inHg

7:00 PM

Overcast night

82° 💧 None 💨 10 mph H 44%29.80 inHg

Wednesday

1:00 AM

Overcast night

69° 💧 None 💨 11 mph H 89%29.71 inHg

7:00 AM

Moderate rain

67° 💧 None 💨 12 mph H 96%29.71 inHg

1:00 PM

Moderate rain

67° 💧 None 💨 8 mph H 99%29.65 inHg

7:00 PM

Light rain

71° 💧 None 💨 2 mph H 94%29.65 inHg

Thursday

1:00 AM

Moderate rain

69° 💧 None 💨 4 mph H 98%29.65 inHg

7:00 AM

Overcast

67° 💧 None 💨 7 mph H 99%29.65 inHg

1:00 PM

Overcast

67° 💧 None 💨 6 mph H 99%29.68 inHg

7:00 PM

Light rain

71° 💧 None 💨 10 mph H 87%29.71 inHg

Friday

1:00 AM

Mostly clear night

68° 💧 None 💨 6 mph H 94%29.74 inHg

7:00 AM

Mostly sunny

64° 💧 None 💨 5 mph H 96%29.83 inHg

1:00 PM

Sunny

60° 💧 None 💨 4 mph H 97%29.88 inHg

7:00 PM

Mostly clear night

76° 💧 None 💨 7 mph H 62%29.88 inHg

Saturday

1:00 AM

Light rain

70° 💧 None 💨 7 mph H 82%29.85 inHg

7:00 AM

Mostly sunny

62° 💧 None 💨 6 mph H 93%29.85 inHg

1:00 PM

Sunny

55° 💧 None 💨 7 mph H 93%29.83 inHg

7:00 PM

Clear night

69° 💧 None 💨 13 mph H 51%29.80 inHg

Sunday

1:00 AM

Mostly clear night

64° 💧 None 💨 13 mph H 64%29.80 inHg

7:00 AM

Sunny

57° 💧 None 💨 8 mph H 75%29.83 inHg

1:00 PM

Sunny

53° 💧 None 💨 8 mph H 83%29.91 inHg

7:00 PM

Overcast night

63° 💧 None 💨 10 mph H 61%29.97 inHg

Monday

1:00 AM

Overcast night

60° 💧 None 💨 6 mph H 69%29.97 inHg

7:00 AM

Overcast

58° 💧 None 💨 5 mph H 70%30.00 inHg

1:00 PM

Sunny

51° 💧 None 💨 4 mph H 85%30.06 inHg

7:00 PM

Clear night

64° 💧 None 💨 3 mph H 58%30.03 inHg

Tuesday

1:00 AM

Partly cloudy night

60° 💧 None 💨 1 mph H 77%30.00 inHg

7:00 AM

Overcast night

53° 💧 None 💨 4 mph H 86%30.03 inHg

1:00 PM

Mostly cloudy

52° 💧 None 💨 4 mph H 84%30.03 inHg

7:00 PM

Mostly cloudy night

67° 💧 None 💨 6 mph H 59%30.00 inHg

Wednesday

1:00 AM

Mostly clear night

62° 💧 None 💨 4 mph H 78%29.97 inHg

7:00 AM

Mostly cloudy night

60° 💧 None 💨 7 mph H 77%30.00 inHg

1:00 PM

Mostly sunny

55° 💧 None 💨 8 mph H 75%30.03 inHg

In Alton and, more broadly, across the state of Illinois: This morning begins with mostly cloudy skies and mild temperatures ranging from 60 to 69 degrees Fahrenheit. Winds will be coming from the northeast at around 11 mph, with gusts reaching up to 21 mph. As the day progresses into the afternoon, the cloud cover is expected to persist, but no precipitation is anticipated. Temperatures are likely to remain steady within the mild range, providing comfortable conditions for outdoor activities. Winds will continue from the northeast, maintaining a moderate breeze throughout the day. Overall, it will be a relatively calm day with partly cloudy skies and no significant weather disruptions.

15-Day Weather Outlook for Alton

TomorrowTomorrow

Overcast 73°/59° 💧 None 💨 6 mph

Friday, Sep 25Fri Sep 25

Overcast 73°/62° 💧 0.013 in 💨 9 mph

Saturday, Sep 26Sat Sep 26

Mostly cloudy 70°/60° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 77°/57° 💧 0.005 in 💨 6 mph

Monday, Sep 28Mon Sep 28

Mostly cloudy 80°/60° 💧 0.055 in 💨 7 mph

Tuesday, Sep 29Tue Sep 29

Overcast 82°/64° 💧 None 💨 10 mph

Wednesday, Sep 30Wed Sep 30

Moderate rain 71°/67° 💧 1.180 in 💨 12 mph

Thursday, Oct 1Thu Oct 1

Moderate rain 71°/67° 💧 0.338 in 💨 10 mph

Friday, Oct 2Fri Oct 2

Mostly sunny 76°/60° 💧 0.055 in 💨 7 mph

Saturday, Oct 3Sat Oct 3

Light rain 70°/55° 💧 0.168 in 💨 13 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 64°/53° 💧 None 💨 13 mph

Monday, Oct 5Mon Oct 5

Overcast 64°/51° 💧 None 💨 6 mph

Tuesday, Oct 6Tue Oct 6

Partly cloudy 67°/52° 💧 None 💨 6 mph

Wednesday, Oct 7Wed Oct 7

Mostly sunny 62°/55° 💧 None 💨 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

Fair

Nearest forecast value 1:00 AM

PM2.5 Fine particles Good 3,9µg/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 4,5µg/m³

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

O₃ Ozone Fair 66,9µg/m³

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

NO₂ Nitrogen dioxide Good 3,5µg/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 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 6,0High 🙂Fair

Tomorrow UV 6,2High 🙂Fair

Friday UV 4,9Moderate 🙂Fair

Saturday UV 1,1Low 😐Moderate

Sunday UV 5,0Moderate —Unavailable

Monday UV 7,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

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

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.

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, ILLINOIS

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

79/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 8:27 PM–5:20 AM

☁ Cloud cover 23% Real hourly forecast for the best viewing hour.

☾ Moonlight 88% Waxing Gibbous · Moon about 15° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 51° high at the best hour.

✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min37%

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.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for Alton were last refreshed today at 12:41 AM. The current forecast period extends through 24/09/2026 at 10:00 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.