Boulder, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boulder, a community in Sublette County, Wyoming.
Today
44°F
Patchy Fog then Mostly Sunny
Patchy fog before 9am. Mostly sunny. High near 44, with temperatures falling to around 40 in the afternoon. Southwest wind 0 to 3 mph.
7-day forecast for Boulder
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 44°F | Patchy Fog then Mostly Sunny | 0 to 3 mph SW | 0% |
| Tonight | 23°F | Mostly Cloudy | 3 mph NE | 3% |
| Wednesday | 47°F | Partly Sunny | 2 mph NW | 4% |
| Wednesday Night | 20°F | Mostly Clear | 1 mph NNE | 0% |
| Thursday | 46°F | Mostly Sunny | 2 mph WNW | 2% |
| Thursday Night | 22°F | Mostly Cloudy | 1 to 6 mph NNW | 2% |
| Friday | 46°F | Sunny | 7 mph NW | 3% |
| Friday Night | 22°F | Partly Cloudy | 9 mph NW | 4% |
| Saturday | 49°F | Sunny | 2 to 7 mph NW | 0% |
| Saturday Night | 22°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 51°F | Sunny | 1 mph NNW | 0% |
| Sunday Night | 26°F | Partly Cloudy | 0 mph | 0% |
| Monday | 52°F | Mostly Sunny | 0 mph | 1% |
| Monday Night | 27°F | Mostly Cloudy | 0 mph | 2% |
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 Nov 3, 2026.