Boulder, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boulder, a community in Sublette County, Wyoming.
This Afternoon
66°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 4pm, then a chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a high near 66. South southwest wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Boulder
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Showers And Thunderstorms Likely | 7 mph SSW | 71% |
| Tonight | 37°F | Showers And Thunderstorms Likely | 1 to 8 mph NW | 70% |
| Saturday | 61°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 1 to 6 mph WSW | 46% |
| Saturday Night | 31°F | Slight Chance Showers And Thunderstorms then Patchy Fog | 1 to 6 mph NW | 18% |
| Sunday | 63°F | Mostly Sunny | 1 to 6 mph NW | 6% |
| Sunday Night | 32°F | Mostly Clear | 0 to 6 mph NNW | 1% |
| Monday | 68°F | Sunny | 2 mph SW | 0% |
| Monday Night | 35°F | Partly Cloudy | 2 mph ENE | 0% |
| Tuesday | 70°F | Mostly Sunny | 2 mph WNW | 5% |
| Tuesday Night | 37°F | Chance Showers And Thunderstorms | 3 mph ENE | 27% |
| Wednesday | 70°F | Sunny | 3 mph NW | 10% |
| Wednesday Night | 36°F | Mostly Clear | 2 mph NNW | 7% |
| Thursday | 72°F | Sunny | 2 mph WNW | 6% |
| Thursday Night | 37°F | Partly Cloudy | 3 mph SE | 9% |
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 Sep 18, 2026.