McKinnon, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKinnon, a community in Sweetwater County, Wyoming.
Today
42°F
Cloudy then Chance Rain Showers
A chance of rain showers after 3pm. Cloudy. High near 42, with temperatures falling to around 39 in the afternoon. West wind 0 to 6 mph. Chance of precipitation is 30%.
7-day forecast for McKinnon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 42°F | Cloudy then Chance Rain Showers | 0 to 6 mph W | 29% |
| Tonight | 26°F | Slight Chance Rain Showers then Partly Cloudy | 6 mph W | 17% |
| Thursday | 46°F | Mostly Sunny | 3 mph NNW | 4% |
| Thursday Night | 27°F | Mostly Cloudy | 3 mph W | 13% |
| Friday | 47°F | Sunny | 5 to 8 mph WNW | 5% |
| Friday Night | 27°F | Mostly Clear | 3 to 9 mph WSW | 1% |
| Saturday | 51°F | Sunny | 3 mph W | 0% |
| Saturday Night | 30°F | Mostly Clear | 2 mph SSW | 0% |
| Sunday | 56°F | Sunny | 2 mph S | 0% |
| Sunday Night | 32°F | Partly Cloudy | 3 mph SSW | 0% |
| Monday | 56°F | Mostly Sunny | 1 mph S | 0% |
| Monday Night | 33°F | Mostly Cloudy | 2 mph SW | 0% |
| Tuesday | 55°F | Partly Sunny | 2 mph W | 1% |
| Tuesday Night | 32°F | Partly Cloudy | 3 mph WSW | 2% |
Forecast source: National Weather Service (api.weather.gov) for McKinnon (41.031, -109.938). Updated through the day.
Growing snapshot for McKinnon
Last spring frost
May 22
First fall frost
Sep 29
Growing season
128 days
Hardiness zone
5b
More local growing data for McKinnon: nearby ZIP 82938 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Arrowhead Springs
Bairoil
Clearview Acres
Eden
Farson
Granger
Green River
James Town
Little America
North Rock Springs
Point of Rocks
Purple Sage
Reliance
Rock Springs
Superior
Table Rock
Wamsutter
Climate data from the nearest NOAA station, Manila, Ut (11.5 mi from McKinnon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.