Barstow, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Barstow, a community in Rock Island County, Illinois.
Overnight
67°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms. Mostly cloudy. Low around 67, with temperatures rising to around 69 overnight. Southeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Barstow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Patchy Fog | 5 mph SE | 30% |
| Saturday | 83°F | Patchy Fog | 5 to 10 mph SE | 88% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 87% |
| Sunday | 71°F | Patchy Fog | 10 to 15 mph NE | 78% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 47% |
| Monday | 65°F | Rain Showers Likely | 15 mph NE | 58% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 8% |
| Wednesday | 67°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 5 mph NE | 3% |
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 Sep 19, 2026.