Guernsey, IA Weather & Growing Conditions
Tonight
47°F
Cloudy then Slight Chance Rain Showers
A slight chance of rain showers between 1am and 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 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Cloudy then Slight Chance Rain Showers | 7 to 10 mph SSW | 20% |
| Wednesday | 54°F | Mostly Cloudy then Chance Rain Showers | 14 mph W | 30% |
| Wednesday Night | 42°F | Mostly Cloudy | 12 mph WSW | 11% |
| Thursday | 53°F | Chance Rain Showers | 10 mph WNW | 41% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph NNW | 18% |
| Friday | 52°F | Partly Sunny | 3 to 9 mph N | 3% |
| Friday Night | 32°F | Partly Cloudy | 2 mph NNW | 1% |
| Saturday | 54°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Saturday Night | 34°F | Mostly Clear | 3 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). Updated through the day.
Growing snapshot for Guernsey, IA
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5b
Explore more for Guernsey, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Belle Plaine, Ia (16.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.