Westminster, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westminster, a city in Adams County, Colorado.
Overnight
35°F
Partly Cloudy
Partly cloudy, with a low around 35. West southwest wind around 5 mph.
7-day forecast for Westminster
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 35°F | Partly Cloudy | 5 mph WSW | 0% |
| Wednesday | 56°F | Partly Sunny | 2 to 7 mph N | 14% |
| Wednesday Night | 37°F | Mostly Cloudy | 1 to 6 mph NW | 14% |
| Thursday | 58°F | Sunny | 1 to 5 mph S | 0% |
| Thursday Night | 37°F | Partly Cloudy | 2 mph SW | 1% |
| Friday | 56°F | Mostly Sunny | 5 mph N | 10% |
| Friday Night | 35°F | Mostly Clear | 3 mph WNW | 10% |
| Saturday | 59°F | Sunny | 5 mph ESE | 1% |
| Saturday Night | 35°F | Mostly Clear | 3 mph SSW | 0% |
| Sunday | 65°F | Sunny | 1 to 6 mph SSW | 0% |
| Sunday Night | 40°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Monday | 65°F | Sunny | 5 mph ENE | 0% |
| Monday Night | 39°F | Partly Cloudy | 2 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 2 mph ENE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Westminster (39.880, -105.062). Updated through the day.
Growing snapshot for Westminster
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
More local growing data for Westminster: nearby ZIP 80031 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Bennett
Berkley
Brighton
Byers
Comanche Creek
Commerce City
Derby
Federal Heights
Lochbuie
Northglenn
Peoria
Shaw Heights
Sherrelwood
Strasburg
Thornton
Todd Creek
Twin Lakes
Welby
Climate data from the nearest NOAA station, Northglenn, Co (2.2 mi from Westminster). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.