Morrison, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morrison, a town in Jefferson County, Colorado.
This Afternoon
48°F
Sunny
Sunny. High near 48, with temperatures falling to around 44 in the afternoon. East northeast wind around 5 mph.
7-day forecast for Morrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Sunny | 5 mph ENE | 0% |
| Tonight | 33°F | Mostly Clear | 3 mph WNW | 0% |
| Wednesday | 47°F | Mostly Sunny then Chance Rain And Snow Showers | 2 to 7 mph N | 47% |
| Wednesday Night | 33°F | Chance Rain And Snow Showers then Mostly Cloudy | 5 mph NW | 42% |
| Thursday | 49°F | Sunny | 0 to 6 mph SE | 0% |
| Thursday Night | 34°F | Partly Cloudy | 1 to 5 mph WSW | 1% |
| Friday | 48°F | Mostly Sunny | 1 to 6 mph N | 14% |
| Friday Night | 33°F | Mostly Clear | 2 to 7 mph WNW | 14% |
| Saturday | 52°F | Sunny | 0 to 8 mph NE | 4% |
| Saturday Night | 33°F | Clear | 1 to 6 mph WNW | 1% |
| Sunday | 62°F | Sunny | 2 to 9 mph SSE | 0% |
| Sunday Night | 40°F | Mostly Clear | 5 to 10 mph W | 0% |
| Monday | 59°F | Sunny | 2 to 9 mph ENE | 0% |
| Monday Night | 40°F | Partly Cloudy | 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Morrison (39.636, -105.206). Updated through the day.
Growing snapshot for Morrison
Last spring frost
May 23
First fall frost
Sep 22
Growing season
118 days
Hardiness zone
5b
More local growing data for Morrison: nearby ZIP 80465 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Evergreen, Co (6.2 mi from Morrison). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.