Mills, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mills, a town in Natrona County, Wyoming.
Overnight
52°F
Patchy Fog
Patchy fog and a slight chance of rain showers before 3am. Partly cloudy, with a low around 52. Southwest wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Mills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Patchy Fog | 5 mph SW | 16% |
| Saturday | 73°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 12 mph WSW | 29% |
| Saturday Night | 42°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph NW | 68% |
| Sunday | 64°F | Showers And Thunderstorms Likely | 8 to 13 mph W | 66% |
| Sunday Night | 38°F | Mostly Cloudy | 2 to 8 mph SW | 9% |
| Monday | 70°F | Sunny | 5 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 3 to 9 mph SSE | 0% |
| Tuesday | 76°F | Sunny | 2 to 6 mph SSW | 0% |
| Tuesday Night | 46°F | Slight Chance Showers And Thunderstorms | 6 mph SE | 17% |
| Wednesday | 77°F | Mostly Sunny | 10 to 14 mph SW | 7% |
| Wednesday Night | 46°F | Partly Cloudy | 6 mph SW | 6% |
| Thursday | 80°F | Sunny | 9 mph SW | 0% |
| Thursday Night | 47°F | Mostly Clear | 5 mph SSE | 1% |
| Friday | 81°F | Mostly Sunny | 7 to 13 mph SW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Mills (42.850, -106.391). Updated through the day.
Growing snapshot for Mills
Last spring frost
May 10
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
5a
More local growing data for Mills: nearby ZIP 82644 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Alcova
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Bar Nunn
Bessemer Bend
Brookhurst
Casper
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Edgerton
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Hartrandt
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Meadow Acres
Midwest
Mountain View
Powder River
Red Butte
Vista West
Climate data from the nearest NOAA station, Casper Wwtp, Wy (4.3 mi from Mills). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.