Fort Collins, CO Weather & Growing Conditions
This Afternoon
84°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 84, with temperatures falling to around 76 in the afternoon. Southwest wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Chance Showers And Thunderstorms | 8 mph SW | 46% |
| Tonight | 53°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 9 mph WNW | 32% |
| Saturday | 75°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 10 mph E | 68% |
| Saturday Night | 50°F | Chance Showers And Thunderstorms | 2 to 8 mph NW | 47% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 3 to 7 mph NE | 56% |
| Sunday Night | 47°F | Slight Chance Rain Showers then Partly Cloudy | 2 to 7 mph NE | 22% |
| Monday | 72°F | Sunny | 2 to 8 mph S | 1% |
| Monday Night | 49°F | Partly Cloudy | 3 to 8 mph NE | 13% |
| Tuesday | 77°F | Mostly Sunny | 3 to 7 mph ENE | 9% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 7 mph NNE | 33% |
| Wednesday | 79°F | Mostly Sunny | 5 to 8 mph NE | 14% |
| Wednesday Night | 51°F | Mostly Cloudy | 6 mph W | 14% |
| Thursday | 78°F | Mostly Sunny | 2 to 9 mph NE | 10% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 9 mph N | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fort Collins, CO
Last spring frost
May 3
First fall frost
Oct 6
Growing season
154 days
Hardiness zone
5b
Explore more for Fort Collins, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Ft Collins 4 E, Co (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.