Fort Collins, CO Weather & Growing Conditions
Tonight
54°F
Chance Showers And Thunderstorms then Mostly Cloudy
A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, with a low around 54. West northwest wind 2 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 8 mph WNW | 32% |
| Saturday | 75°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 9 mph E | 67% |
| Saturday Night | 50°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 7 mph NW | 45% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 6 mph ENE | 56% |
| Sunday Night | 47°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 6 mph NE | 21% |
| Monday | 72°F | Sunny | 1 to 8 mph SSE | 2% |
| Monday Night | 49°F | Partly Cloudy | 2 to 8 mph ENE | 11% |
| Tuesday | 77°F | Mostly Sunny | 2 to 7 mph NE | 10% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 7 mph NNE | 33% |
| Wednesday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 mph NE | 16% |
| Wednesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph W | 15% |
| Thursday | 78°F | Mostly Sunny | 2 to 9 mph NE | 11% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 9 mph NW | 16% |
| Friday | 79°F | Mostly Sunny | 2 to 9 mph E | 13% |
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 (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.