Barstow, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Barstow, a community in Rock Island County, Illinois.
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 52, with temperatures rising to around 54 overnight. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
7-day forecast for Barstow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 10 to 15 mph S | 77% |
| Wednesday | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 23% |
| Wednesday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph SW | 15% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 47% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 28% |
| Friday | 52°F | Partly Sunny | 5 to 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 | 0 to 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 10 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Barstow (41.516, -90.357). Updated through the day.
Growing snapshot for Barstow
Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
190 days
Hardiness zone
5b
More local growing data for Barstow: nearby ZIP 61236 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 (4.8 mi from Barstow). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.