Sinclair, WY Weather & Growing Conditions
Today
80°F
Areas Of Smoke then Sunny
Areas of smoke before noon. Sunny, with a high near 80. North wind 5 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Areas Of Smoke then Sunny | 5 to 15 mph N | 0% |
| Tonight | 49°F | Mostly Clear | 5 to 15 mph N | 0% |
| Wednesday | 84°F | Sunny | 0 to 15 mph SW | 0% |
| Wednesday Night | 50°F | Mostly Clear | 5 to 15 mph WSW | 0% |
| Thursday | 89°F | Sunny | 0 to 15 mph WSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Friday | 92°F | Sunny | 0 to 10 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 15 mph WSW | 0% |
| Saturday | 94°F | Sunny | 0 to 15 mph WSW | 0% |
| Saturday Night | 59°F | Partly Cloudy | 0 to 15 mph SSE | 0% |
| Sunday | 93°F | Sunny | 0 to 15 mph WSW | 2% |
| Sunday Night | 60°F | Partly Cloudy | 5 to 15 mph SW | 5% |
| Monday | 93°F | Mostly Sunny | 5 to 10 mph WSW | 5% |
| Monday Night | 58°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph SSE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sinclair, WY
Last spring frost
May 12
First fall frost
Oct 4
Growing season
143 days
Hardiness zone
5a
Explore more for Sinclair, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Seminoe Rsvrbr, Wy (14.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.