Buffalo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Buffalo, a village in Sangamon County, Illinois.
Overnight
64°F
Mostly Clear
Mostly clear, with a low around 64. South southeast wind around 3 mph.
7-day forecast for Buffalo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Mostly Clear | 3 mph SSE | 0% |
| Tuesday | 87°F | Sunny | 6 mph S | 0% |
| Tuesday Night | 67°F | Mostly Clear | 5 mph SSE | 0% |
| Wednesday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph S | 17% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 6 mph S | 80% |
| Thursday | 82°F | Showers And Thunderstorms | 7 mph SSW | 80% |
| Thursday Night | 66°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph SSE | 21% |
| Friday | 84°F | Partly Sunny | 3 mph SW | 9% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 3 mph SSW | 20% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 3 to 7 mph SSW | 19% |
| Saturday Night | 71°F | Mostly Clear | 5 to 8 mph S | 10% |
| Sunday | 89°F | Sunny | 8 to 13 mph SSW | 5% |
| Sunday Night | 72°F | Mostly Clear | 12 mph SSW | 12% |
| Monday | 90°F | Mostly Sunny | 12 mph SSW | 13% |
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 Aug 4, 2026.