Morrison, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morrison, a town in Jefferson County, Colorado.
This Afternoon
73°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 73, with temperatures falling to around 62 in the afternoon. West northwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Morrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Chance Showers And Thunderstorms | 5 mph WNW | 54% |
| Tonight | 52°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph W | 31% |
| Saturday | 68°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph NE | 64% |
| Saturday Night | 49°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph NW | 47% |
| Sunday | 63°F | Chance Showers And Thunderstorms | 2 to 6 mph N | 52% |
| Sunday Night | 48°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph NW | 27% |
| Monday | 64°F | Sunny | 1 to 8 mph SSE | 4% |
| Monday Night | 49°F | Mostly Clear | 2 to 6 mph WNW | 9% |
| Tuesday | 68°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph E | 29% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph W | 25% |
| Wednesday | 68°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph ESE | 28% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 3 mph NW | 20% |
| Thursday | 68°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph N | 22% |
| Thursday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 3 mph W | 30% |
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 Sep 19, 2026.