Guernsey, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Guernsey, a city in Poweshiek County, Iowa.
Tonight
47°F
Rain Showers Likely
Rain showers likely before 3am. Cloudy. Low around 47, with temperatures rising to around 50 overnight. South southwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Guernsey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Rain Showers Likely | 7 to 10 mph SSW | 63% |
| Wednesday | 54°F | Mostly Cloudy then Chance Rain Showers | 10 to 14 mph W | 30% |
| Wednesday Night | 42°F | Mostly Cloudy | 12 mph WSW | 12% |
| Thursday | 53°F | Chance Rain Showers | 10 mph WNW | 41% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph NNW | 17% |
| Friday | 51°F | Partly Sunny | 3 to 9 mph N | 3% |
| Friday Night | 32°F | Partly Cloudy | 2 mph NNW | 1% |
| Saturday | 54°F | Mostly Sunny | 3 mph W | 1% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 60°F | Sunny | 6 mph W | 6% |
| Sunday Night | 36°F | Mostly Clear | 5 mph WSW | 2% |
| Monday | 64°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 63°F | Sunny | 6 mph NW | 0% |
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 Nov 4, 2026.