Guernsey, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Guernsey, a city in Poweshiek County, Iowa.
Overnight
63°F
Partly Cloudy
Partly cloudy. Low around 63, with temperatures rising to around 65 overnight. South wind around 5 mph.
7-day forecast for Guernsey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 5 mph S | 1% |
| Tuesday | 85°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 7 mph WSW | 23% |
| Tuesday Night | 62°F | Showers And Thunderstorms | 7 mph NNE | 89% |
| Wednesday | 75°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph NNE | 74% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 5 mph NNE | 45% |
| Thursday | 80°F | Sunny | 2 mph NE | 9% |
| Thursday Night | 59°F | Mostly Clear | 1 mph ENE | 0% |
| Friday | 83°F | Sunny | 1 to 5 mph SE | 5% |
| Friday Night | 64°F | Mostly Clear | 5 mph SSE | 14% |
| Saturday | 87°F | Sunny | 6 mph S | 12% |
| Saturday Night | 70°F | Mostly Clear | 9 mph S | 14% |
| Sunday | 88°F | Mostly Sunny | 10 mph S | 14% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 8 mph S | 34% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 10 mph SSW | 34% |
Forecast source: National Weather Service (api.weather.gov) for Guernsey (41.651, -92.346). Updated through the day.
Growing snapshot for Guernsey
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5b
More local growing data for Guernsey: nearby ZIP 52221 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Belle Plaine, Ia (16.9 mi from Guernsey). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.