Boulder Flats, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boulder Flats, a community in Fremont County, Wyoming.
Overnight
32°F
Mostly Cloudy
Mostly cloudy, with a low around 32. Southwest wind around 2 mph.
7-day forecast for Boulder Flats
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Mostly Cloudy | 2 mph SW | 0% |
| Wednesday | 49°F | Mostly Cloudy | 3 mph NW | 0% |
| Wednesday Night | 28°F | Partly Cloudy | 3 to 7 mph W | 0% |
| Thursday | 51°F | Mostly Sunny | 3 mph SE | 0% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 10 mph WSW | 6% |
| Friday | 50°F | Sunny | 2 to 6 mph W | 6% |
| Friday Night | 31°F | Mostly Clear | 3 to 8 mph WSW | 0% |
| Saturday | 54°F | Sunny | 3 mph S | 0% |
| Saturday Night | 33°F | Mostly Clear | 6 mph WSW | 0% |
| Sunday | 59°F | Sunny | 3 to 9 mph SW | 0% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 9 mph WSW | 0% |
| Monday | 57°F | Mostly Sunny | 5 mph WSW | 0% |
| Monday Night | 36°F | Mostly Cloudy | 6 mph WSW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph W | 0% |
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 Nov 4, 2026.