Fairmont, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairmont, a community in Will County, Illinois.
This Afternoon
74°F
Rain Showers Likely
Rain showers likely. Partly sunny, with a high near 74. East wind 10 to 15 mph. Chance of precipitation is 60%.
7-day forecast for Fairmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Rain Showers Likely | 10 to 15 mph E | 57% |
| Tonight | 64°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 41% |
| Saturday | 79°F | Showers And Thunderstorms Likely | 5 to 10 mph SSE | 79% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph SSE | 82% |
| Sunday | 70°F | Showers And Thunderstorms | 10 to 15 mph NNE | 82% |
| Sunday Night | 57°F | Rain Showers Likely | 15 mph NE | 68% |
| Monday | 65°F | Rain Showers Likely | 15 mph ENE | 57% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Wednesday | 67°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 70°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 54°F | Mostly Cloudy | 5 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Fairmont (41.561, -88.059). Updated through the day.
Growing snapshot for Fairmont
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
More local growing data for Fairmont: nearby ZIP 60432 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (4.5 mi from Fairmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.