Guernsey, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Guernsey, a town in Platte County, Wyoming.
This Afternoon
53°F
Sunny
Sunny. High near 53, with temperatures falling to around 46 in the afternoon. North northwest wind 5 to 15 mph.
7-day forecast for Guernsey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 53°F | Sunny | 5 to 15 mph NNW | 2% |
| Tonight | 30°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 54°F | Mostly Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 33°F | Mostly Cloudy | 5 mph NW | 0% |
| Thursday | 60°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 34°F | Partly Cloudy | 0 to 5 mph SSW | 0% |
| Friday | 57°F | Sunny | 0 to 5 mph NW | 1% |
| Friday Night | 33°F | Mostly Clear | 0 to 5 mph W | 3% |
| Saturday | 60°F | Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 34°F | Mostly Clear | 0 mph | 0% |
| Sunday | 68°F | Sunny | 0 to 5 mph WSW | 0% |
| Sunday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Monday | 64°F | Sunny | 5 mph N | 0% |
| Monday Night | 39°F | Partly Cloudy | 5 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Guernsey (42.265, -104.743). Updated through the day.
Growing snapshot for Guernsey
Last spring frost
May 7
First fall frost
Oct 6
Growing season
152 days
Hardiness zone
5a
More local growing data for Guernsey: nearby ZIP 82214 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Chugcreek
Chugwater
El Rancho
Glendo
Hartville
Lakeview North
Orin
Slater
Westview Circle
Wheatland
Whiting
Y-O Ranch
Climate data from the nearest NOAA station, Guernsey 2Nw, Wy (1.5 mi from Guernsey). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.