Sandwich, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Sandwich, a city in Dekalb County, Illinois.

This Afternoon

69°F

Rain Likely

Rain likely and a slight chance of thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 66 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Sandwich

When	Temp	Forecast	Wind	Precip
This Afternoon	69°F	Rain Likely	15 to 20 mph S	68%
Tonight	58°F	Rain	15 mph S	92%
Wednesday	61°F	Chance Rain	15 mph SSW	47%
Wednesday Night	47°F	Slight Chance Rain	15 mph SW	15%
Thursday	56°F	Chance Rain	10 to 15 mph WSW	41%
Thursday Night	42°F	Chance Rain	5 to 10 mph WNW	39%
Friday	52°F	Slight Chance Rain then Mostly Cloudy	10 to 15 mph N	21%
Friday Night	34°F	Partly Cloudy	5 to 10 mph NNW	2%
Saturday	52°F	Mostly Sunny	5 mph WNW	4%
Saturday Night	33°F	Partly Cloudy	0 to 5 mph WSW	3%
Sunday	57°F	Mostly Sunny	5 to 10 mph W	13%
Sunday Night	34°F	Mostly Clear	5 mph WNW	6%
Monday	61°F	Sunny	5 to 15 mph WSW	3%
Monday Night	39°F	Mostly Clear	5 to 10 mph W	1%

Forecast source: National Weather Service (api.weather.gov) for Sandwich (41.650, -88.619). Updated through the day.

Growing snapshot for Sandwich

Last spring frost

Apr 28

First fall frost

Oct 13

Growing season

166 days

Hardiness zone

More local growing data for Sandwich: nearby ZIP 60548 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Cortland DeKalb Genoa Hinckley Kingston Kirkland Lake Holiday Malta Shabbona Somonauk Sycamore Waterman

All Illinois locations ›

Climate data from the nearest NOAA station, Chicago Aurora Muni Ap, Il (11.5 mi from Sandwich). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.