Sinclair, WY Weather & Growing Conditions
Today
67°F
Showers And Thunderstorms Likely
A chance of rain showers before 9am, then showers and thunderstorms likely. Partly sunny. High near 67, with temperatures falling to around 64 in the afternoon. South southwest wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Showers And Thunderstorms Likely | 10 to 15 mph SSW | 55% |
| Tonight | 38°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 44% |
| Sunday | 60°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 to 15 mph W | 38% |
| Sunday Night | 35°F | Mostly Clear | 5 to 10 mph N | 6% |
| Monday | 71°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph S | 0% |
| Tuesday | 74°F | Sunny | 5 to 10 mph SSW | 3% |
| Tuesday Night | 40°F | Chance Rain Showers | 5 to 10 mph SSW | 29% |
| Wednesday | 72°F | Mostly Sunny | 5 to 15 mph SW | 10% |
| Wednesday Night | 39°F | Partly Cloudy | 5 to 10 mph SW | 8% |
| Thursday | 75°F | Sunny | 5 mph WSW | 2% |
| Thursday Night | 41°F | Partly Cloudy | 5 mph SSE | 4% |
| Friday | 77°F | Mostly Sunny | 5 to 10 mph SSW | 9% |
| Friday Night | 43°F | Partly Cloudy | 10 mph SSW | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sinclair, WY
Last spring frost
Jun 12
First fall frost
Sep 7
Growing season
83 days
Hardiness zone
5a
Explore more for Sinclair, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Saratoga 4N, Wy (17.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.