Olmsted, IL Weather & Growing Conditions
This Afternoon
98°F
Sunny
Sunny. High near 98, with temperatures falling to around 95 in the afternoon. Southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Sunny | 7 mph SW | 1% |
| Tonight | 72°F | Mostly Clear | 2 mph SSW | 0% |
| Sunday | 97°F | Mostly Sunny | 2 to 6 mph SW | 2% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 3 mph NE | 19% |
| Monday | 91°F | Chance Showers And Thunderstorms | 5 mph NE | 27% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 6 mph NNE | 27% |
| Tuesday | 80°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 to 10 mph N | 27% |
| Tuesday Night | 59°F | Partly Cloudy | 5 to 10 mph N | 11% |
| Wednesday | 78°F | Mostly Sunny | 7 mph N | 1% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Thursday | 79°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Thursday Night | 58°F | Partly Cloudy | 5 mph NNE | 1% |
| Friday | 81°F | Partly Sunny | 2 to 6 mph NNE | 4% |
| Friday Night | 59°F | Partly Cloudy | 5 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Olmsted, IL
Last spring frost
Apr 3
First fall frost
Nov 5
Growing season
216 days
Hardiness zone
7a
Explore more for Olmsted, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Grand Chain Dam 53, Il (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.