Lyman, WY Weather & Growing Conditions
Tonight
42°F
Showers And Thunderstorms
Showers and thunderstorms before 3am. Mostly cloudy. Low around 42, with temperatures rising to around 44 overnight. South wind 3 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Showers And Thunderstorms | 3 to 9 mph S | 80% |
| Saturday | 64°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 14 mph W | 36% |
| Saturday Night | 37°F | Partly Cloudy | 5 to 13 mph WSW | 7% |
| Sunday | 66°F | Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 37°F | Mostly Clear | 1 to 8 mph WSW | 0% |
| Monday | 70°F | Mostly Sunny | 2 mph WNW | 0% |
| Monday Night | 42°F | Partly Cloudy | 3 mph S | 3% |
| Tuesday | 70°F | Partly Sunny then Chance Showers And Thunderstorms | 2 mph SSE | 29% |
| Tuesday Night | 42°F | Chance Showers And Thunderstorms | 6 mph SW | 30% |
| Wednesday | 72°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 mph W | 13% |
| Wednesday Night | 41°F | Mostly Clear | 5 mph WSW | 4% |
| Thursday | 74°F | Mostly Sunny | 3 mph SSE | 6% |
| Thursday Night | 43°F | Partly Cloudy | 5 mph SSE | 9% |
| Friday | 75°F | Mostly Sunny | 3 mph SW | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lyman, WY
Last spring frost
Jun 14
First fall frost
Sep 9
Growing season
84 days
Hardiness zone
5a
Explore more for Lyman, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Mtn View, Wy (6.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.