Boulder Flats, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boulder Flats, a community in Fremont County, Wyoming.
Today
80°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 80. East northeast wind 1 to 9 mph.
7-day forecast for Boulder Flats
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Areas Of Smoke | 1 to 9 mph ENE | 0% |
| Tonight | 52°F | Areas Of Smoke | 3 to 9 mph NW | 2% |
| Wednesday | 87°F | Sunny | 2 to 9 mph NE | 0% |
| Wednesday Night | 57°F | Mostly Clear | 7 to 13 mph W | 0% |
| Thursday | 92°F | Sunny | 2 to 9 mph N | 0% |
| Thursday Night | 62°F | Mostly Clear | 8 to 16 mph WNW | 0% |
| Friday | 95°F | Sunny | 2 to 13 mph W | 1% |
| Friday Night | 64°F | Mostly Clear | 16 mph W | 0% |
| Saturday | 96°F | Sunny | 8 to 14 mph WNW | 0% |
| Saturday Night | 64°F | Partly Cloudy | 12 to 15 mph W | 0% |
| Sunday | 95°F | Sunny | 7 to 10 mph NW | 6% |
| Sunday Night | 63°F | Partly Cloudy | 10 to 15 mph W | 1% |
| Monday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 6 to 9 mph NNW | 15% |
| Monday Night | 62°F | Partly Cloudy | 9 to 13 mph WNW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Boulder Flats (42.916, -108.799). Updated through the day.
Growing snapshot for Boulder Flats
Last spring frost
May 16
First fall frost
Sep 28
Growing season
133 days
Hardiness zone
5a
More local growing data for Boulder Flats: nearby ZIP 82510 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Arapahoe
Atlantic City
Crowheart
Dubois
Ethete
Fort Washakie
Hudson
Jeffrey City
Johnstown
Lander
Pavillion
Riverton
Shoshoni
Climate data from the nearest NOAA station, Riverton, Wy (8.1 mi from Boulder Flats). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.