Fort Collins, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Collins, a city in Larimer County, Colorado.
This Afternoon
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 83, with temperatures falling to around 76 in the afternoon. South southwest wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Fort Collins
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 8 mph SSW | 47% |
| Tonight | 55°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph WNW | 32% |
| Saturday | 75°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 8 mph ENE | 66% |
| Saturday Night | 51°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 6 mph WNW | 43% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 5 mph ENE | 56% |
| Sunday Night | 48°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 5 mph ENE | 20% |
| Monday | 72°F | Sunny | 1 to 8 mph SSE | 2% |
| Monday Night | 50°F | Mostly Clear | 2 to 8 mph NE | 10% |
| Tuesday | 76°F | Mostly Sunny | 2 to 6 mph ENE | 10% |
| Tuesday Night | 52°F | Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph NNE | 32% |
| Wednesday | 77°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph NE | 18% |
| Wednesday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph W | 15% |
| Thursday | 78°F | Mostly Sunny | 2 to 8 mph NE | 12% |
| Thursday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 8 mph WNW | 17% |
Forecast source: National Weather Service (api.weather.gov) for Fort Collins (40.548, -105.065). Updated through the day.
Growing snapshot for Fort Collins
Last spring frost
May 3
First fall frost
Oct 6
Growing season
154 days
Hardiness zone
5b
More local growing data for Fort Collins: nearby ZIP 80525 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ft Collins 4 E, Co (3.5 mi from Fort Collins). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.