10-Day Weather Forecast - Alton, IL
- 92|77°FMostly SunnyHourly details
Today
92°FSunny hot with highs in the mid 90s. Northeast winds around 5 mph. Heat index values up to 113.
Tonight
77°FMostly clear. Patchy fog after midnight. Humid with lows in the mid 70s. Northeast winds around 5 mph in the evening becoming light and variable. Heat index values up to 109 early in the evening.
- 90|76°F40% Chance of StormsHourly details
Day
90°FSunny. Patchy fog in the morning. A chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. Southeast winds around 5 mph. Chance of rain 40 percent. Heat index values up to 106.
Night
76°FPartly cloudy in the evening then becoming mostly cloudy. A chance of thunderstorms. A chance of showers. Humid with lows in the lower 70s. Northeast winds around 5 mph. Chance of rain 50 percent. Heat index values up to 101 early in the evening.
- 77|65°F50% Chance of StormsHourly details
Day
77°FMostly cloudy with a chance of showers with a slight chance of thunderstorms. Cooler with highs in the upper 70s. North winds 5 to 10 mph. Chance of rain 50 percent.
Night
65°FMostly cloudy. A slight chance of showers in the evening. Lows in the mid 60s. Chance of rain 20 percent.
- 80|59°FMostly SunnyHourly details
Day
80°FMostly sunny. Highs in the upper 70s.
Night
59°FMostly clear. Lows in the lower 60s. Highs in the lower 80s.
Weekend Weather
- 79|61°FMostly SunnyHourly details
Day
79°FMostly clear. Lows in the lower 60s. Highs in the lower 80s.
Night
61°FMostly clear. Lows in the lower 60s. Highs in the lower 80s.
- 81|65°FMostly SunnyHourly details
Day
81°FMostly clear. Lows in the lower 60s. Highs in the lower 80s.
Night
65°FPartly cloudy. Lows in the mid 60s.
- 82|72°FMostly Sunny
Day
82°FMostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent.
Night
72°FClear with a chance of rain. Chance of precipitation 35%. Low temperature around 72F. Dew point will be around 69F with an average humidity of 82%. Winds will be 4 mph from the S.
- 89|75°F40% Chance of Rain
Day
89°FSunny with a chance of rain. Chance of precipitation 35%. High temperature around 89F. Dew point will be around 73F with an average humidity of 72%. Winds will be 6 mph from the S.
Night
75°FClear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 75F. Dew point will be around 73F with an average humidity of 77%. Winds will be 6 mph from the SW.
- 92|76°F30% Chance of Rain
Day
92°FSunny with a 30% chance for rain and thunderstorms. High temperature around 92F. Dew point will be around 74F with an average humidity of 68%. Winds will be 6 mph from the SW.
Night
76°FClear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 76F. Dew point will be around 73F with an average humidity of 74%. Winds will be 4 mph from the SW.
- 93|76°F30% Chance of Rain
Day
93°FSunny with a 30% chance for rain and thunderstorms. High temperature around 93F. Dew point will be around 74F with an average humidity of 67%. Winds will be 6 mph from the SW.
Night
76°FClear with a 30% chance for rain and thunderstorms. Low temperature around 76F. Dew point will be around 72F with an average humidity of 72%. Winds will be 4 mph from the SW.
