Bar Nunn, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bar Nunn, a town in Natrona County, Wyoming.
Today
79°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 79. East wind 7 to 12 mph.
7-day forecast for Bar Nunn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Areas Of Smoke | 7 to 12 mph E | 1% |
| Tonight | 49°F | Areas Of Smoke | 5 to 20 mph ENE | 2% |
| Wednesday | 87°F | Sunny | 3 to 12 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 5 to 12 mph NW | 0% |
| Thursday | 93°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 57°F | Clear | 5 to 12 mph NNW | 0% |
| Friday | 98°F | Sunny | 5 to 9 mph W | 0% |
| Friday Night | 60°F | Clear | 10 mph W | 0% |
| Saturday | 98°F | Sunny | 9 to 17 mph W | 0% |
| Saturday Night | 61°F | Mostly Clear | 7 to 10 mph NE | 0% |
| Sunday | 98°F | Sunny | 9 to 16 mph W | 1% |
| Sunday Night | 61°F | Partly Cloudy | 7 to 13 mph N | 5% |
| Monday | 97°F | Sunny | 7 to 12 mph W | 3% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 10 mph ENE | 18% |
Forecast source: National Weather Service (api.weather.gov) for Bar Nunn (42.922, -106.347). Updated through the day.
Growing snapshot for Bar Nunn
Last spring frost
May 10
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
5a
More local growing data for Bar Nunn: nearby ZIP 82644 weather · frost dates · planting calendar · Wyoming frost dates
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Midwest
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Climate data from the nearest NOAA station, Casper Wwtp, Wy (4.3 mi from Bar Nunn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.