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
51°F
Mostly Cloudy
Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. Southwest wind around 10 mph.
7-day forecast for West Branch
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 10 mph SW | 10% |
| Wednesday | 52°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph SW | 33% |
| Wednesday Night | 46°F | Slight Chance Rain Showers | 10 mph W | 15% |
| Thursday | 54°F | Rain Showers Likely | 10 mph W | 72% |
| Thursday Night | 41°F | Mostly Cloudy | 5 to 10 mph N | 10% |
| Friday | 50°F | Mostly Sunny | 5 to 10 mph N | 4% |
| Friday Night | 31°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 mph W | 2% |
| Sunday Night | 36°F | Clear | 0 to 5 mph W | 0% |
| Monday | 62°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 0 to 5 mph NW | 0% |
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 Nov 4, 2026.