Guernsey, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Guernsey, a town in Platte County, Wyoming.
Tonight
56°F
Chance Showers And Thunderstorms then Mostly Cloudy
A chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 56. Southwest wind 0 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Guernsey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 10 mph SW | 48% |
| Saturday | 74°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph ESE | 46% |
| Saturday Night | 53°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph ESE | 41% |
| Sunday | 67°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph NNW | 32% |
| Sunday Night | 48°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph NNW | 29% |
| Monday | 70°F | Mostly Sunny | 0 to 10 mph E | 3% |
| Monday Night | 50°F | Mostly Clear | 10 mph ESE | 1% |
| Tuesday | 78°F | Mostly Sunny | 5 to 15 mph SE | 3% |
| Tuesday Night | 55°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SE | 15% |
| Wednesday | 80°F | Mostly Sunny | 0 to 5 mph SSE | 11% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph W | 10% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph NE | 6% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 10 mph ESE | 14% |
| Friday | 82°F | Mostly Sunny | 0 to 10 mph SE | 7% |
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 Sep 19, 2026.