Barstow, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Barstow, a community in Rock Island County, Illinois.
Overnight
61°F
Mostly Clear
Mostly clear. Low around 61, with temperatures rising to around 63 overnight. South wind around 5 mph.
7-day forecast for Barstow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny | 5 to 10 mph S | 8% |
| Tuesday Night | 68°F | Showers And Thunderstorms Likely | 5 mph NW | 68% |
| Wednesday | 79°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph N | 73% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph N | 76% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 50% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph NE | 11% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph S | 6% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 9% |
| Saturday | 85°F | Sunny | 5 to 10 mph S | 9% |
| Saturday Night | 71°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 15% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 10 to 15 mph SW | 15% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 35% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 35% |
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 Aug 4, 2026.