Harman US

Towanda, IL Weather & Growing Conditions

Tonight
54°F
Light Rain
Rain before 2am, then rain showers likely. Cloudy. Low around 54, with temperatures rising to around 59 overnight. South wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 54°F Light Rain 17 mph S 95%
Wednesday 61°F Chance Rain Showers then Mostly Cloudy 15 to 18 mph SW 27%
Wednesday Night 45°F Mostly Cloudy 13 mph SW 5%
Thursday 60°F Partly Sunny 12 to 16 mph WSW 7%
Thursday Night 41°F Mostly Cloudy then Chance Light Rain 6 to 9 mph NW 27%
Friday 55°F Slight Chance Light Rain then Partly Sunny 8 to 13 mph NNW 18%
Friday Night 34°F Mostly Cloudy 3 to 10 mph NNW 6%
Saturday 53°F Mostly Sunny 6 mph WNW 3%
Saturday Night 33°F Partly Cloudy 5 mph W 3%
Sunday 59°F Sunny 5 to 10 mph W 13%
Sunday Night 34°F Mostly Clear 5 to 8 mph WNW 7%
Monday 64°F Sunny 5 to 13 mph SW 3%
Monday Night 39°F Mostly Clear 6 to 10 mph WSW 2%
Tuesday 66°F Sunny 8 mph WNW 1%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Towanda, IL

Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
172 days
Hardiness zone
6a

Explore more for Towanda, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Normal 4Ne, Il (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.