Westminster, CO Weather & Growing Conditions
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. West wind around 3 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 3 mph W | 8% |
| Saturday | 75°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph N | 68% |
| Saturday Night | 53°F | Chance Showers And Thunderstorms | 2 to 6 mph NW | 53% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 2 to 7 mph NE | 56% |
| Sunday Night | 51°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph SSE | 34% |
| Monday | 74°F | Mostly Sunny | 1 to 6 mph NE | 2% |
| Monday Night | 52°F | Mostly Clear | 1 to 6 mph NNW | 13% |
| Tuesday | 76°F | Mostly Sunny | 1 to 6 mph NNE | 11% |
| Tuesday Night | 54°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SSW | 18% |
| Wednesday | 77°F | Partly Sunny | 2 to 6 mph NNE | 12% |
| Wednesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph SW | 17% |
| Thursday | 78°F | Mostly Sunny | 2 to 6 mph N | 12% |
| Thursday Night | 56°F | Chance Rain Showers then Mostly Cloudy | 2 to 6 mph S | 29% |
| Friday | 79°F | Mostly Sunny | 2 to 7 mph SSE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Westminster, CO
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
Explore more for Westminster, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Northglenn, Co (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.