McKinnon, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKinnon, a community in Sweetwater County, Wyoming.
This Afternoon
68°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 5pm, then a chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a high near 68. South southwest wind around 6 mph. Chance of precipitation is 70%.
7-day forecast for McKinnon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms Likely | 6 mph SSW | 67% |
| Tonight | 40°F | Showers And Thunderstorms Likely | 1 to 6 mph SSE | 66% |
| Saturday | 61°F | Chance Showers And Thunderstorms | 1 to 6 mph NW | 71% |
| Saturday Night | 36°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph W | 22% |
| Sunday | 63°F | Sunny | 3 to 8 mph WNW | 1% |
| Sunday Night | 38°F | Partly Cloudy | 2 to 7 mph WSW | 0% |
| Monday | 68°F | Mostly Sunny | 5 mph ENE | 1% |
| Monday Night | 42°F | Partly Cloudy | 3 mph SE | 6% |
| Tuesday | 68°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph W | 49% |
| Tuesday Night | 42°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SW | 32% |
| Wednesday | 70°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph WNW | 25% |
| Wednesday Night | 42°F | Mostly Clear | 5 mph SW | 8% |
| Thursday | 72°F | Mostly Sunny | 6 mph SE | 8% |
| Thursday Night | 44°F | Partly Cloudy | 6 mph S | 10% |
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
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Bairoil
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James Town
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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 Sep 19, 2026.