Fort Collins, CO Weather & Growing Conditions
Tonight
53°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 53. West 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 | 53°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 8 mph W | 31% |
| Saturday | 72°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 8 mph ESE | 69% |
| Saturday Night | 49°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 mph NW | 41% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 6 mph ENE | 56% |
| Sunday Night | 46°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 6 mph W | 19% |
| Monday | 70°F | Sunny | 1 to 10 mph SSW | 3% |
| Monday Night | 48°F | Mostly Clear | 2 to 9 mph ENE | 8% |
| Tuesday | 73°F | Mostly Sunny | 2 to 8 mph ENE | 13% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 to 7 mph NE | 32% |
| Wednesday | 75°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph ENE | 22% |
| Wednesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph WSW | 17% |
| Thursday | 76°F | Mostly Sunny | 3 to 9 mph NNE | 14% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 8 mph W | 18% |
| Friday | 76°F | Mostly Sunny | 2 to 10 mph ESE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fort Collins, CO
Last spring frost
May 2
First fall frost
Oct 7
Growing season
157 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, Co (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.