Fort Collins, CO Weather & Growing Conditions
This Afternoon
70°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 70. East southeast wind around 7 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Slight Chance Showers And Thunderstorms | 7 mph ESE | 16% |
| Tonight | 44°F | Mostly Clear | 2 to 6 mph W | 10% |
| Monday | 69°F | Sunny | 2 to 9 mph SSE | 1% |
| Monday Night | 47°F | Partly Cloudy | 1 to 8 mph SSE | 6% |
| Tuesday | 73°F | Mostly Sunny | 2 to 8 mph ENE | 7% |
| Tuesday Night | 50°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph WSW | 17% |
| Wednesday | 72°F | Partly Sunny then Chance Showers And Thunderstorms | 6 mph NE | 31% |
| Wednesday Night | 51°F | Mostly Cloudy | 3 to 7 mph WSW | 14% |
| Thursday | 75°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 10 mph N | 17% |
| Thursday Night | 52°F | Partly Cloudy | 3 to 8 mph SW | 9% |
| Friday | 76°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 9 mph S | 28% |
| Friday Night | 52°F | Partly Cloudy | 6 to 10 mph WSW | 10% |
| Saturday | 78°F | Sunny | 10 mph SSW | 8% |
| Saturday Night | 51°F | Partly Cloudy | 8 mph WSW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fort Collins, CO
Last spring frost
May 21
First fall frost
Sep 29
Growing season
128 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, Buckhorn Mtn 1 E, Co (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.