Boulder, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boulder, a community in Sublette County, Wyoming.
Overnight
39°F
Patchy Smoke
Patchy smoke. Mostly clear. Low around 39, with temperatures rising to around 42 overnight. North northwest wind around 2 mph.
7-day forecast for Boulder
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 39°F | Patchy Smoke | 2 mph NNW | 0% |
| Tuesday | 78°F | Areas Of Smoke | 1 to 12 mph W | 0% |
| Tuesday Night | 40°F | Areas Of Smoke | 1 to 16 mph NNW | 0% |
| Wednesday | 80°F | Sunny | 1 to 13 mph SW | 0% |
| Wednesday Night | 42°F | Mostly Clear | 1 to 16 mph NNW | 0% |
| Thursday | 85°F | Sunny | 1 to 16 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 17 mph N | 0% |
| Friday | 88°F | Sunny | 0 to 16 mph WSW | 0% |
| Friday Night | 51°F | Mostly Clear | 3 to 15 mph NNW | 0% |
| Saturday | 88°F | Sunny | 1 to 14 mph NW | 0% |
| Saturday Night | 53°F | Partly Cloudy | 2 to 13 mph NNW | 0% |
| Sunday | 87°F | Sunny | 1 to 10 mph W | 6% |
| Sunday Night | 52°F | Partly Cloudy | 2 to 13 mph N | 2% |
| Monday | 86°F | Sunny | 1 to 9 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Boulder (42.746, -109.707). Updated through the day.
Growing snapshot for Boulder
Growing season
58 days
Hardiness zone
4b
More local growing data for Boulder: nearby ZIP 82941 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Pinedale, Wy (9.4 mi from Boulder). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.