Joslin, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Joslin, a community in Rock Island County, Illinois.
This Afternoon
67°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 67. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Joslin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms | 15 mph S | 92% |
| Tonight | 52°F | Showers And Thunderstorms 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% |
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
5b
More local growing data for Joslin: nearby ZIP 61257 weather · frost dates · planting calendar · Illinois frost dates
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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 3, 2026.