Buffalo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Buffalo, a village in Sangamon County, Illinois.
Tonight
44°F
Slight Chance Drizzle then Mostly Cloudy
A slight chance of drizzle before 10pm. Mostly cloudy, with a low around 44. Southwest wind around 10 mph, with gusts as high as 17 mph.
7-day forecast for Buffalo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Slight Chance Drizzle then Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 58°F | Mostly Cloudy | 9 to 15 mph WSW | 13% |
| Thursday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 6 to 10 mph NW | 18% |
| Friday | 51°F | Partly Sunny | 8 to 13 mph N | 1% |
| Friday Night | 31°F | Mostly Clear | 2 to 7 mph NNW | 0% |
| Saturday | 52°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 31°F | Mostly Clear | 3 mph WNW | 0% |
| Sunday | 59°F | Sunny | 1 to 7 mph W | 0% |
| Sunday Night | 34°F | Mostly Clear | 1 to 5 mph W | 0% |
| Monday | 64°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 39°F | Clear | 3 to 7 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 5 mph W | 2% |
| Tuesday Night | 39°F | Mostly Clear | 3 mph NNW | 2% |
| Veterans Day | 64°F | Mostly Sunny | 1 to 5 mph N | 2% |
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 Nov 5, 2026.