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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
Arrowhead Springs
Bairoil
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North Rock Springs
Point of Rocks
Purple Sage
Rock Springs
Superior
Table Rock
Wamsutter
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.