Hanna, WY Weather & Growing Conditions
Overnight
45°F
Mostly Cloudy
Mostly cloudy, with a low around 45. Southwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Cloudy | 10 mph SW | 8% |
| Saturday | 58°F | Partly Sunny then Chance Showers And Thunderstorms | 10 to 15 mph SW | 50% |
| Saturday Night | 39°F | Chance Showers And Thunderstorms | 10 to 15 mph WSW | 45% |
| Sunday | 50°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 to 15 mph W | 41% |
| Sunday Night | 37°F | Partly Cloudy | 5 to 10 mph WNW | 7% |
| Monday | 59°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph SSE | 0% |
| Tuesday | 64°F | Sunny | 5 to 10 mph SSW | 2% |
| Tuesday Night | 42°F | Slight Chance Rain Showers | 5 to 10 mph S | 23% |
| Wednesday | 62°F | Mostly Sunny | 10 to 15 mph SW | 12% |
| Wednesday Night | 42°F | Partly Cloudy | 5 to 10 mph SW | 7% |
| Thursday | 66°F | Sunny | 5 to 10 mph SW | 2% |
| Thursday Night | 44°F | Partly Cloudy | 5 mph SSE | 2% |
| Friday | 67°F | Mostly Sunny | 5 to 15 mph SSW | 7% |
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 Sep 19, 2026.