Mammoth, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mammoth, a community in Park County, Wyoming.
Today
74°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 74. North northwest wind 2 to 9 mph.
7-day forecast for Mammoth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Areas Of Smoke | 2 to 9 mph NNW | 0% |
| Tonight | 46°F | Smoke | 2 to 9 mph SW | 0% |
| Wednesday | 83°F | Sunny | 1 to 9 mph SSW | 0% |
| Wednesday Night | 50°F | Mostly Clear | 2 to 9 mph SW | 0% |
| Thursday | 89°F | Sunny | 3 to 10 mph WSW | 0% |
| Thursday Night | 54°F | Mostly Clear | 3 to 10 mph SSW | 0% |
| Friday | 92°F | Sunny | 2 to 12 mph SW | 0% |
| Friday Night | 57°F | Partly Cloudy | 5 to 9 mph W | 0% |
| Saturday | 91°F | Sunny | 3 to 8 mph SSW | 1% |
| Saturday Night | 58°F | Partly Cloudy | 3 to 7 mph W | 1% |
| Sunday | 89°F | Sunny | 3 to 8 mph SW | 2% |
| Sunday Night | 56°F | Partly Cloudy | 5 to 9 mph NNW | 6% |
| Monday | 89°F | Sunny | 3 to 8 mph SW | 4% |
| Monday Night | 56°F | Partly Cloudy | 6 to 9 mph N | 8% |
Forecast source: National Weather Service (api.weather.gov) for Mammoth (44.973, -110.693). Updated through the day.
Growing snapshot for Mammoth
Last spring frost
May 21
First fall frost
Sep 27
Growing season
128 days
Hardiness zone
4b
More local growing data for Mammoth: nearby ZIP 59030 weather · frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Gardiner, Mt (6.5 mi from Mammoth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.