Kirby, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kirby, a town in Hot Springs County, Wyoming.
Today
53°F
Sunny
Sunny. High near 53, with temperatures falling to around 49 in the afternoon. Southeast wind around 5 mph.
7-day forecast for Kirby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 53°F | Sunny | 5 mph SE | 0% |
| Tonight | 25°F | Mostly Clear then Patchy Fog | 2 to 6 mph S | 0% |
| Wednesday | 53°F | Areas Of Fog then Mostly Sunny | 3 mph NNE | 0% |
| Wednesday Night | 26°F | Partly Cloudy | 3 mph SSW | 0% |
| Thursday | 57°F | Sunny | 2 to 6 mph SSW | 0% |
| Thursday Night | 29°F | Partly Cloudy | 3 mph WSW | 1% |
| Friday | 54°F | Sunny | 3 mph S | 1% |
| Friday Night | 28°F | Mostly Clear | 3 mph S | 3% |
| Saturday | 57°F | Sunny | 3 mph S | 0% |
| Saturday Night | 30°F | Mostly Clear | 2 to 6 mph S | 0% |
| Sunday | 64°F | Sunny | 7 mph SSW | 0% |
| Sunday Night | 34°F | Partly Cloudy | 6 mph SW | 0% |
| Monday | 61°F | Mostly Sunny | 5 mph SSW | 0% |
| Monday Night | 33°F | Partly Cloudy | 3 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Kirby (43.803, -108.181). Updated through the day.
Growing snapshot for Kirby
Last spring frost
May 24
First fall frost
Sep 16
Growing season
112 days
Hardiness zone
4b
More local growing data for Kirby: nearby ZIP 82430 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Thermopolis 9Ne, Wy (4 mi from Kirby). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.