West Branch, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Branch, a city in Cedar County, Iowa.
Overnight
63°F
Mostly Clear
Mostly clear, with a low around 63. South wind around 5 mph.
7-day forecast for West Branch
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Tuesday Night | 66°F | Showers And Thunderstorms Likely | 5 mph N | 83% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph NE | 74% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph N | 56% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 30% |
| Thursday Night | 61°F | Mostly Clear | 0 mph | 3% |
| Friday | 83°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph S | 12% |
| Saturday | 86°F | Sunny | 5 mph S | 10% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 14% |
| Sunday | 87°F | Mostly Sunny | 10 mph S | 14% |
| 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 West Branch (41.666, -91.344). Updated through the day.
Growing snapshot for West Branch
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5b
More local growing data for West Branch: nearby ZIP 52358 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Iowa City, Ia (11.2 mi from West Branch). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.