Fort Collins, Colorado Weather
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Climate of Fort Collins: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Fort Collins, with average daytime highs around 32°C. February is the coolest, when nights typically fall to about -7°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 39°C, so the seasons feel very different from each other.
The area receives about 450 mm of rain in a typical year. Rainfall is modest in every month; May is the wettest at about 68 mm.
For outdoor plans and travel, May to September usually offer the most comfortable weather in Fort Collins, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 5° | -6° | 19 mm | 56% |
| Feb | 5° | -7° | 23 mm | 57% |
| Mar | 11° | -3° | 34 mm | 52% |
| Apr | 16° | 0° | 52 mm | 50% |
| May | 21° | 6° | 68 mm | 51% |
| Jun | 29° | 12° | 45 mm | 43% |
| Jul | 32° | 16° | 53 mm | 43% |
| Aug | 30° | 14° | 44 mm | 44% |
| Sep | 26° | 10° | 37 mm | 44% |
| Oct | 17° | 2° | 33 mm | 49% |
| Nov | 10° | -3° | 21 mm | 52% |
| Dec | 4° | -7° | 21 mm | 58% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Fort Collins. Values describe typical conditions, not a forecast.
About Fort Collins weather
Fort Collins is a place in Colorado's high-altitude climate, ranging from semi-arid plains to alpine mountains, located about 94 km north of Denver. Fort Collins gets warm days and cool nights (June–August), especially at altitude each year. Fort Collins closes out the year with cold, snowy winters in the mountains, milder on the eastern plains. This page shows live, auto-refreshing weather for Fort Collins: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Denver.
Frequently asked questions
Fort Collins is about 94 km north of Denver, in Colorado.
Fort Collins sees cold, snowy winters in the mountains, milder on the eastern plains.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Fort Collins's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Fort Collins, with average daytime highs of about 32°C and nights around 16°C.
The coldest nights come in February, when the average low is about -7°C and daytime highs reach around 5°C. Frost is possible on clear, calm nights.
Fort Collins receives about 450 mm of rain in a typical year. May is the wettest month at roughly 68 mm; no month averages more than 100 mm.
May to September usually offer the most comfortable weather in Fort Collins, with mild daytime temperatures and little rain.
In November Fort Collins typically sees daytime highs near 10°C and lows near -3°C, with about 21 mm of rain over the month and average humidity around 52%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Fort Collins updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Fort Collins's day-to-day weather follows the broader pattern of Colorado described above. See the hourly weather forecast or the air quality index for more detail.