Portland, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a community in Ouray County, Colorado.
Tonight
51°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 51. South southeast wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Slight Chance Showers And Thunderstorms | 10 mph SSE | 24% |
| Saturday | 69°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 23% |
| Saturday Night | 46°F | Mostly Clear | 5 to 10 mph SSW | 4% |
| Sunday | 69°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 46°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Monday | 71°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Monday Night | 49°F | Partly Cloudy | 5 to 10 mph SW | 3% |
| Tuesday | 69°F | Showers And Thunderstorms | 5 to 10 mph SSW | 78% |
| Tuesday Night | 49°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 53% |
| Wednesday | 67°F | Showers And Thunderstorms Likely | 5 mph WSW | 57% |
| Wednesday Night | 49°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 18% |
| Thursday | 69°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph NNE | 50% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 37% |
| Friday | 68°F | Showers And Thunderstorms Likely | 5 mph SW | 60% |
Forecast source: National Weather Service (api.weather.gov) for Portland (38.089, -107.695). Updated through the day.
Growing snapshot for Portland
Last spring frost
Jun 11
First fall frost
Sep 13
Growing season
92 days
Hardiness zone
6a
More local growing data for Portland: nearby ZIP 81432 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ridgway, Co (1.6 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.