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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.

This Afternoon
65°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 5pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 65, with temperatures falling to around 61 in the afternoon. West southwest wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Reliance

WhenTempForecastWindPrecip
This Afternoon 65°F Showers And Thunderstorms Likely 10 mph WSW 71%
Tonight 38°F Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms 3 to 9 mph W 40%
Sunday 63°F Patchy Fog then Sunny 3 to 8 mph WSW 1%
Sunday Night 37°F Partly Cloudy 1 to 6 mph SE 0%
Monday 68°F Mostly Sunny 3 mph S 0%
Monday Night 40°F Partly Cloudy 0 to 3 mph NNE 0%
Tuesday 72°F Mostly Sunny 2 to 8 mph SSE 6%
Tuesday Night 43°F Chance Showers And Thunderstorms 6 mph SW 29%
Wednesday 71°F Mostly Sunny 5 to 9 mph WSW 9%
Wednesday Night 41°F Mostly Clear 2 to 6 mph WSW 2%
Thursday 74°F Sunny 3 mph SW 2%
Thursday Night 44°F Partly Cloudy 3 mph SE 3%
Friday 74°F Mostly Sunny 5 mph S 6%
Friday Night 45°F Partly Cloudy 7 mph SSW 9%

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 20, 2026.