Joslin, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Joslin, a community in Rock Island County, Illinois.

Tonight

52°F

Rain Showers Likely

Rain showers likely. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

7-day forecast for Joslin

When	Temp	Forecast	Wind	Precip
Tonight	52°F	Rain Showers Likely	10 to 15 mph S	74%
Wednesday	57°F	Slight Chance Rain Showers then Mostly Cloudy	15 mph SW	24%
Wednesday Night	45°F	Mostly Cloudy	10 to 15 mph SW	13%
Thursday	55°F	Chance Rain Showers	10 to 15 mph W	46%
Thursday Night	42°F	Chance Rain Showers	5 to 10 mph NW	27%
Friday	52°F	Partly Sunny	10 mph N	13%
Friday Night	34°F	Partly Cloudy	0 to 5 mph N	1%
Saturday	53°F	Mostly Sunny	0 to 5 mph W	2%
Saturday Night	35°F	Partly Cloudy	5 mph W	4%
Sunday	59°F	Sunny	5 to 10 mph W	11%
Sunday Night	36°F	Mostly Clear	5 mph W	3%
Monday	63°F	Sunny	5 to 15 mph SW	1%
Monday Night	40°F	Mostly Clear	5 to 10 mph W	0%
Tuesday	64°F	Sunny	5 to 10 mph NW	0%

Forecast source: National Weather Service (api.weather.gov) for Joslin (41.545, -90.222). Updated through the day.

Growing snapshot for Joslin

Last spring frost

Apr 16

First fall frost

Oct 25

Growing season

190 days

Hardiness zone

More local growing data for Joslin: nearby ZIP 61257 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

All Illinois locations ›

Climate data from the nearest NOAA station, Le Claire L&D 14, Ia (9.3 mi from Joslin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.