Alton, IL

Right Now
56°
Fog
  • Humidity: 95%
  • Feels Like: 56°
  • Heat Index: 56°
  • Wind: 3 mph
  • Wind Chill: 56°
  • UV Index: 4 Moderate
  • Sunrise: 07:17:34 AM
  • Sunset: 06:11:50 PM
  • Dew Point: 55°
  • Visibility: 1.5 mi

Today

Partly cloudy skies. Areas of patchy fog. High 83F. Winds S at 10 to 20 mph.

Tonight

Clear skies this evening followed by isolated thunderstorms overnight. Low 61F. Winds S at 10 to 15 mph. Chance of rain 40%.

Tomorrow

Thunderstorms in the morning, then variable clouds during the afternoon with still a chance of showers. Much colder. Morning high of 65F with temps falling to near 50. Winds NW at 10 to 20 mph. Chance of rain 60%.

Next 12 Hours

Time
Temp
Precip
8 AM
56°
3%
8 AM
56°

Wind: SSE @ 6mph

Precip: 3% Chance

Humidity: 100%

Wind Chill: 55°

Heat Index: 56°

UV Index: 0 Low

Visibility: 4 mi

9 AM
61°
2%
9 AM
61°

Wind: S @ 8mph

Precip: 2% Chance

Humidity: 95%

Wind Chill: 60°

Heat Index: 61°

UV Index: 1 Low

Visibility: 7 mi

10 AM
67°
2%
10 AM
67°

Wind: S @ 9mph

Precip: 2% Chance

Humidity: 85%

Wind Chill: 67°

Heat Index: 67°

UV Index: 2 Low

Visibility: 9 mi

11 AM
73°
2%
11 AM
73°

Wind: S @ 12mph

Precip: 2% Chance

Humidity: 80%

Wind Chill: 73°

Heat Index: 73°

UV Index: 3 Moderate

Visibility: 10 mi

12 PM
77°
1%
12 PM
77°

Wind: S @ 13mph

Precip: 1% Chance

Humidity: 72%

Wind Chill: 77°

Heat Index: 77°

UV Index: 4 Moderate

Visibility: 10 mi

1 PM
79°
1%
1 PM
79°

Wind: S @ 15mph

Precip: 1% Chance

Humidity: 69%

Wind Chill: 79°

Heat Index: 82°

UV Index: 4 Moderate

Visibility: 10 mi

2 PM
80°
1%
2 PM
80°

Wind: S @ 15mph

Precip: 1% Chance

Humidity: 65%

Wind Chill: 80°

Heat Index: 83°

UV Index: 4 Moderate

Visibility: 10 mi

3 PM
80°
1%
3 PM
80°

Wind: S @ 15mph

Precip: 1% Chance

Humidity: 63%

Wind Chill: 80°

Heat Index: 84°

UV Index: 2 Low

Visibility: 10 mi

4 PM
81°
1%
4 PM
81°

Wind: S @ 14mph

Precip: 1% Chance

Humidity: 61%

Wind Chill: 81°

Heat Index: 84°

UV Index: 1 Low

Visibility: 10 mi

5 PM
80°
1%
5 PM
80°

Wind: S @ 13mph

Precip: 1% Chance

Humidity: 60%

Wind Chill: 80°

Heat Index: 83°

UV Index: 0 Low

Visibility: 10 mi

6 PM
77°
2%
6 PM
77°

Wind: S @ 12mph

Precip: 2% Chance

Humidity: 63%

Wind Chill: 77°

Heat Index: 80°

UV Index: 0 Low

Visibility: 10 mi

7 PM
73°
3%
7 PM
73°

Wind: SSE @ 11mph

Precip: 3% Chance

Humidity: 72%

Wind Chill: 73°

Heat Index: 74°

UV Index: 0 Low

Visibility: 10 mi