Buffalo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Buffalo, a village in Sangamon County, Illinois.
Tonight
54°F
Rain
Rain before 2am, then a chance of rain showers between 2am and 5am. Cloudy, with a low around 54. South southwest wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Buffalo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain | 13 to 18 mph SSW | 95% |
| Wednesday | 60°F | Mostly Cloudy | 12 to 16 mph SW | 12% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 mph SW | 1% |
| Thursday | 60°F | Mostly Sunny | 9 to 14 mph WSW | 4% |
| Thursday Night | 43°F | Mostly Cloudy then Slight Chance Light Rain | 7 mph NW | 22% |
| Friday | 55°F | Partly Sunny | 6 to 12 mph NNW | 13% |
| Friday Night | 37°F | Mostly Cloudy | 2 to 9 mph N | 5% |
| Saturday | 54°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 60°F | Sunny | 2 to 9 mph W | 8% |
| Sunday Night | 35°F | Mostly Clear | 3 to 7 mph WNW | 5% |
| Monday | 64°F | Sunny | 3 to 10 mph SW | 2% |
| Monday Night | 40°F | Mostly Clear | 7 mph WSW | 2% |
| Tuesday | 66°F | Sunny | 7 mph WNW | 0% |
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 4, 2026.