Byron, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Byron, a town in Big Horn County, Wyoming.
Overnight
49°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 49. West northwest wind around 5 mph.
7-day forecast for Byron
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Areas Of Smoke | 5 mph WNW | 0% |
| Tuesday | 77°F | Areas Of Smoke | 1 to 5 mph NE | 0% |
| Tuesday Night | 50°F | Smoke | 1 to 13 mph NNW | 2% |
| Wednesday | 85°F | Sunny | 0 to 5 mph ESE | 0% |
| Wednesday Night | 54°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Thursday | 93°F | Sunny | 0 to 6 mph ESE | 0% |
| Thursday Night | 58°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Friday | 98°F | Sunny | 0 to 5 mph E | 0% |
| Friday Night | 61°F | Mostly Clear | 6 to 9 mph NNW | 0% |
| Saturday | 97°F | Sunny | 5 mph N | 0% |
| Saturday Night | 62°F | Mostly Clear | 6 mph N | 0% |
| Sunday | 96°F | Sunny | 3 mph N | 2% |
| Sunday Night | 61°F | Partly Cloudy | 6 to 9 mph NNW | 4% |
| Monday | 94°F | Sunny | 5 mph NNW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Byron (44.797, -108.508). Updated through the day.
Growing snapshot for Byron
Last spring frost
May 6
First fall frost
Oct 1
Growing season
148 days
Hardiness zone
5a
More local growing data for Byron: nearby ZIP 82412 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Deaver, Wy (7.3 mi from Byron). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.