Harman US

Hammond, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Hammond, a village in Piatt County, Illinois.

Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. East southeast wind around 9 mph, with gusts as high as 16 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Hammond

WhenTempForecastWindPrecip
Tonight 70°F Partly Cloudy 9 mph ESE 6%
Saturday 90°F Chance Showers And Thunderstorms 10 mph SSW 28%
Saturday Night 69°F Mostly Cloudy then Slight Chance Showers And Thunderstorms 8 mph S 20%
Sunday 86°F Chance Showers And Thunderstorms 5 to 12 mph NW 35%
Sunday Night 60°F Chance Showers And Thunderstorms 13 mph NE 66%
Monday 71°F Showers And Thunderstorms Likely 14 mph NE 68%
Monday Night 54°F Showers And Thunderstorms Likely 12 to 15 mph NE 59%
Tuesday 68°F Chance Rain Showers 15 mph NE 34%
Tuesday Night 52°F Mostly Cloudy 7 to 14 mph NNE 8%
Wednesday 70°F Partly Sunny 12 mph NNE 2%
Wednesday Night 53°F Partly Cloudy 5 to 10 mph NNE 2%
Thursday 72°F Mostly Sunny 6 to 10 mph NNE 3%
Thursday Night 54°F Partly Cloudy 5 to 9 mph NNE 5%
Friday 74°F Mostly Sunny 6 to 10 mph NNE 5%

Forecast source: National Weather Service (api.weather.gov) for Hammond (39.803, -88.595). Updated through the day.

Growing snapshot for Hammond

Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a

More local growing data for Hammond: nearby ZIP 61929 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Decatur Ap, Il (12.7 mi from Hammond). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.