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Reliance, WY Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Reliance, a community in Sweetwater County, Wyoming.

Overnight
47°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 3am, then patchy fog. Mostly cloudy, with a low around 47. South wind around 5 mph. Chance of precipitation is 20%.

7-day forecast for Reliance

WhenTempForecastWindPrecip
Overnight 47°F Slight Chance Showers And Thunderstorms 5 mph S 18%
Saturday 65°F Patchy Fog then Slight Chance Showers And Thunderstorms 3 to 12 mph SW 55%
Saturday Night 36°F Slight Chance Showers And Thunderstorms then Partly Cloudy 3 to 10 mph WSW 22%
Sunday 65°F Sunny 3 to 9 mph WSW 0%
Sunday Night 37°F Mostly Clear 2 to 7 mph N 0%
Monday 70°F Sunny 1 to 5 mph WNW 0%
Monday Night 41°F Partly Cloudy 0 to 5 mph ENE 1%
Tuesday 73°F Mostly Sunny then Slight Chance Showers And Thunderstorms 1 to 7 mph S 11%
Tuesday Night 42°F Chance Showers And Thunderstorms 6 mph SW 29%
Wednesday 73°F Mostly Sunny 3 to 8 mph SW 7%
Wednesday Night 42°F Mostly Clear 5 mph SW 3%
Thursday 75°F Sunny 1 to 5 mph SW 1%
Thursday Night 43°F Partly Cloudy 3 mph S 3%
Friday 76°F Mostly Sunny 2 to 6 mph SSW 7%

Forecast source: National Weather Service (api.weather.gov) for Reliance (41.668, -109.198). Updated through the day.

Growing snapshot for Reliance

Last spring frost
May 24
First fall frost
Sep 24
Growing season
121 days
Hardiness zone
5a

More local growing data for Reliance: nearby ZIP 82943 weather · frost dates · planting calendar · Wyoming frost dates

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Climate data from the nearest NOAA station, Rock Springs Fire Dept, Wy (9 mi from Reliance). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.