Hanna, WY Weather & Growing Conditions
Today
42°F
Cloudy
Cloudy. High near 42, with temperatures falling to around 37 in the afternoon. East northeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 42°F | Cloudy | 5 to 10 mph ENE | 0% |
| Tonight | 25°F | Mostly Cloudy | 5 to 10 mph ENE | 0% |
| Thursday | 42°F | Sunny | 5 to 10 mph SW | 0% |
| Thursday Night | 29°F | Mostly Cloudy | 5 to 10 mph SW | 2% |
| Friday | 41°F | Sunny | 10 to 15 mph WSW | 6% |
| Friday Night | 27°F | Mostly Clear | 10 to 15 mph WSW | 2% |
| Saturday | 44°F | Sunny | 5 to 15 mph WSW | 0% |
| Saturday Night | 30°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Sunday | 49°F | Sunny | 10 to 20 mph SW | 0% |
| Sunday Night | 34°F | Mostly Clear | 15 mph SW | 0% |
| Monday | 49°F | Mostly Sunny | 10 to 15 mph WSW | 0% |
| Monday Night | 34°F | Partly Cloudy | 10 mph SW | 0% |
| Tuesday | 48°F | Mostly Sunny | 10 to 15 mph SW | 0% |
| Tuesday Night | 34°F | Partly Cloudy | 10 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hanna, WY
Last spring frost
May 20
First fall frost
Sep 28
Growing season
128 days
Hardiness zone
5a
Explore more for Hanna, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Leo 6 Sw, Wy (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.