Buffalo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Buffalo, a village in Sangamon County, Illinois.
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. Southeast wind around 8 mph.
7-day forecast for Buffalo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 8 mph SE | 4% |
| Saturday | 92°F | Partly Sunny | 9 mph SSW | 13% |
| Saturday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 mph SSW | 25% |
| Sunday | 85°F | Chance Rain Showers | 3 to 10 mph NNW | 52% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 68% |
| Monday | 72°F | Showers And Thunderstorms Likely | 12 to 15 mph NE | 68% |
| Monday Night | 56°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 56% |
| Tuesday | 68°F | Chance Rain Showers | 14 mph NE | 32% |
| Tuesday Night | 53°F | Mostly Cloudy | 6 to 12 mph NNE | 5% |
| Wednesday | 71°F | Partly Sunny | 7 to 10 mph NNE | 2% |
| Wednesday Night | 54°F | Partly Cloudy | 3 to 9 mph NNE | 1% |
| Thursday | 72°F | Mostly Sunny | 5 to 9 mph NNE | 3% |
| Thursday Night | 56°F | Partly Cloudy | 3 to 8 mph NNE | 5% |
| Friday | 74°F | Mostly Sunny | 5 to 9 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Buffalo (39.850, -89.409). Updated through the day.
Growing snapshot for Buffalo
Last spring frost
Apr 14
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
6a
More local growing data for Buffalo: nearby ZIP 62515 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Springfield Capital Ap, Il (16.9 mi from Buffalo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.