Harman US

Alta, WY Weather & Growing Conditions

This Afternoon
53°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 53. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 53°F Chance Showers And Thunderstorms 5 mph W 32%
Tonight 39°F Chance Showers And Thunderstorms 0 to 3 mph NNW 50%
Sunday 54°F Patchy Fog then Slight Chance Rain Showers 0 to 6 mph NW 15%
Sunday Night 39°F Partly Cloudy 3 mph ESE 0%
Monday 61°F Sunny 6 mph WSW 0%
Monday Night 43°F Mostly Clear 3 to 7 mph E 0%
Tuesday 64°F Mostly Sunny 7 mph SSW 2%
Tuesday Night 46°F Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 5 mph SSE 34%
Wednesday 62°F Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 7 mph SSW 19%
Wednesday Night 45°F Mostly Clear 6 mph S 5%
Thursday 66°F Sunny 7 mph S 3%
Thursday Night 48°F Mostly Clear 8 mph SE 1%
Friday 66°F Mostly Sunny 9 mph SSE 4%
Friday Night 47°F Partly Cloudy 8 mph SSE 12%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Alta, WY

Last spring frost
Jun 14
First fall frost
Sep 11
Growing season
85 days
Hardiness zone
5a

Explore more for Alta, WY: full frost dates · planting calendar · Wyoming frost dates

Climate data from the nearest NOAA station, Alta 1 Nnw, Wy (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.