Westminster, CO Weather & Growing Conditions
Tonight
35°F
Mostly Clear
Mostly clear, with a low around 35. South wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Mostly Clear | 1 to 5 mph S | 0% |
| Wednesday | 56°F | Mostly Sunny | 1 to 6 mph N | 11% |
| Wednesday Night | 36°F | Mostly Cloudy | 1 to 5 mph NW | 10% |
| Thursday | 57°F | Sunny | 5 mph SSE | 0% |
| Thursday Night | 36°F | Partly Cloudy | 2 mph SSW | 1% |
| Friday | 57°F | Mostly Sunny | 5 mph NNE | 8% |
| Friday Night | 36°F | Mostly Clear | 3 mph SW | 8% |
| Saturday | 59°F | Sunny | 5 mph ESE | 1% |
| Saturday Night | 35°F | Mostly Clear | 3 mph W | 0% |
| Sunday | 67°F | Sunny | 2 to 6 mph S | 0% |
| Sunday Night | 41°F | Mostly Clear | 6 mph WSW | 0% |
| Monday | 65°F | Sunny | 5 mph SE | 0% |
| Monday Night | 40°F | Partly Cloudy | 3 mph W | 0% |
| Tuesday | 64°F | Mostly Sunny | 3 mph ESE | 5% |
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 (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.