Fort Collins, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Collins, a city in Larimer County, Colorado.
Overnight
59°F
Patchy Smoke
Patchy smoke. Mostly cloudy, with a low around 59. Northeast wind around 10 mph, with gusts as high as 16 mph.
7-day forecast for Fort Collins
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Patchy Smoke | 10 mph NE | 13% |
| Tuesday | 79°F | Patchy Smoke | 8 to 12 mph E | 8% |
| Tuesday Night | 56°F | Patchy Smoke | 3 to 12 mph E | 8% |
| Wednesday | 87°F | Patchy Smoke | 3 to 10 mph ENE | 2% |
| Wednesday Night | 59°F | Patchy Smoke then Mostly Clear | 5 to 10 mph NE | 1% |
| Thursday | 97°F | Sunny | 3 to 9 mph N | 1% |
| Thursday Night | 62°F | Mostly Clear | 6 to 9 mph NNW | 0% |
| Friday | 99°F | Sunny | 2 to 9 mph ENE | 0% |
| Friday Night | 65°F | Mostly Clear | 9 mph SSW | 0% |
| Saturday | 101°F | Sunny | 2 to 12 mph NW | 3% |
| Saturday Night | 65°F | Partly Cloudy | 7 to 12 mph NW | 1% |
| Sunday | 100°F | Sunny | 5 to 12 mph ENE | 10% |
| Sunday Night | 67°F | Partly Cloudy | 8 to 12 mph W | 6% |
| Monday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 12 mph N | 21% |
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 Aug 4, 2026.