Fort Collins, CO Weather & Growing Conditions
Tonight
48°F
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms. Partly cloudy. Low around 48, with temperatures rising to around 51 overnight. North wind around 6 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 | 48°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 mph N | 34% |
| Sunday | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph NNE | 55% |
| Sunday Night | 46°F | Mostly Clear | 3 to 8 mph N | 11% |
| Monday | 71°F | Sunny | 3 to 10 mph SSW | 1% |
| Monday Night | 47°F | Partly Cloudy | 3 to 10 mph E | 4% |
| Tuesday | 76°F | Mostly Sunny | 3 to 9 mph E | 2% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 9 mph ENE | 8% |
| Wednesday | 78°F | Mostly Sunny | 8 mph ENE | 9% |
| Wednesday Night | 51°F | Partly Cloudy | 8 mph NNW | 7% |
| Thursday | 80°F | Sunny | 5 to 12 mph NE | 4% |
| Thursday Night | 52°F | Partly Cloudy | 3 to 12 mph NNE | 7% |
| Friday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 10 mph SSW | 20% |
| Friday Night | 52°F | Chance Rain Showers then Partly Cloudy | 6 to 10 mph SW | 27% |
| Saturday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
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 (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.