Alton, IN Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, IN in one place.
Showers and thunderstorms likely. Mostly cloudy, with a high near 86. Southwest wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Alton, IN is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 9, 2026 12:52 AM EDT.
The active forecast window currently covers Jun 9 to Jun 15, 2026 for Alton, IN.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 15, 2026
- Latest sync
- Jun 9, 2026 12:52 AM EDT
- Forecast office
- LMK
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Wednesday looks like the warmest upcoming period in Alton at 92 degrees F.
Sunday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Tuesday at about 8 mph SW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 9, 2026 12:52 AM EDT
- Coverage
- 7 days
- Time zone
- America/Indiana/Marengo
- Forecast office
- LMK
- Radar station
- KLVX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely. Mostly cloudy, with a low around 74. South wind 2 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 8am, then a slight chance of showers and thunderstorms between 8am and 2pm. Mostly sunny, with a high near 92. Heat index values as high as 103. Southwest wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Mostly clear, with a low around 75. Southwest wind 2 to 7 mph.
A slight chance of rain showers between 8am and 11am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 2am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Chance of precipitation is 40%.
Mostly sunny, with a high near 88.
A slight chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Showers And Thunderstorms Likely
|
86°F |
8 mph
SW
|
|
Tuesday Night
Jun 9
|
Showers And Thunderstorms Likely
|
74°F |
2 to 7 mph
S
|
|
Wednesday
Jun 10
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
92°F |
3 to 8 mph
SW
|
|
Wednesday Night
Jun 10
|
Mostly Clear
|
75°F |
2 to 7 mph
SW
|
|
Thursday
Jun 11
|
Slight Chance Showers And Thunderstorms
|
91°F |
2 to 8 mph
SW
|
|
Thursday Night
Jun 11
|
Chance Showers And Thunderstorms
|
72°F |
7 mph
SW
|
|
Friday
Jun 12
|
Chance Showers And Thunderstorms
|
87°F |
7 mph
W
|
|
Friday Night
Jun 12
|
Chance Showers And Thunderstorms then Partly Cloudy
|
63°F |
0 to 6 mph
W
|
|
Saturday
Jun 13
|
Mostly Sunny
|
88°F |
0 to 3 mph
SW
|
|
Saturday Night
Jun 13
|
Slight Chance Showers And Thunderstorms
|
68°F |
0 to 3 mph
SW
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
87°F |
1 to 6 mph
W
|
|
Sunday Night
Jun 14
|
Chance Showers And Thunderstorms
|
62°F |
5 mph
N
|
|
Monday
Jun 15
|
Chance Rain Showers
|
83°F |
2 to 6 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.