Best time to visit Fort Collins
The best time to visit Fort Collins is June and September–October, judged on twenty years of weather records and the events worth going for.
Fort Collins, Colorado, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 5.2 °C / 41 °F | -7.3 °C / 19 °F | 16 mm / 0.6 in | neither best nor good |
| February | 6 °C / 43 °F | -7.1 °C / 19 °F | 21 mm / 0.8 in | neither best nor good |
| March | 12.4 °C / 54 °F | -2.1 °C / 28 °F | 40 mm / 1.6 in | good month |
| April | 16.1 °C / 61 °F | 1.5 °C / 35 °F | 54 mm / 2.1 in | good month |
| May | 20.2 °C / 68 °F | 6.5 °C / 44 °F | 92 mm / 3.6 in | good month |
| June | 27.6 °C / 82 °F | 12.2 °C / 54 °F | 44 mm / 1.7 in | best month |
| July | 30.7 °C / 87 °F | 15.4 °C / 60 °F | 45 mm / 1.8 in | good month |
| August | 29.7 °C / 85 °F | 14.5 °C / 58 °F | 29 mm / 1.1 in | good month |
| September | 25.7 °C / 78 °F | 10.3 °C / 51 °F | 37 mm / 1.4 in | best month |
| October | 17.6 °C / 64 °F | 3.5 °C / 38 °F | 34 mm / 1.3 in | best month |
| November | 11.4 °C / 53 °F | -2.1 °C / 28 °F | 21 mm / 0.8 in | neither best nor good |
| December | 5.6 °C / 42 °F | -6.5 °C / 20 °F | 20 mm / 0.8 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: good
- AApril: good
- MMay: good
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: best
- OOctober: best
- NNovember: neither
- DDecember: neither
- Best
- June, September–October
- Good
- March–May, July–August
Why these months
March · good
In its favour: precipitation 40 mm / 1.6 in, share of daylight that is sunny 88%, days with heavy rain 0.9 days, wet days 7 days, relative humidity 52%.
Against: feels like (high) 8.6 °C / 47 °F, average daily high 12.4 °C / 54 °F, average daily low -2.1 °C / 28 °F.
April · good
In its favour: precipitation 54 mm / 2.1 in, share of daylight that is sunny 85%, average daily high 16.1 °C / 61 °F, feels like (high) 12.8 °C / 55 °F, days with heavy rain 1.2 days, wet days 8.9 days, relative humidity 51%.
Against: average daily low 1.5 °C / 35 °F.
May · good
In its favour: feels like (high) 18.3 °C / 65 °F, average daily high 20.2 °C / 68 °F, share of daylight that is sunny 83%, precipitation 92 mm / 3.6 in, days with heavy rain 2.8 days, relative humidity 57%, average daily low 6.5 °C / 44 °F.
Against: wet days 12.4 days.
June · best
In its favour: feels like (high) 26.9 °C / 80 °F, precipitation 44 mm / 1.7 in, share of daylight that is sunny 88%, average daily high 27.6 °C / 82 °F, days with heavy rain 1.1 days, wet days 8.4 days, average daily low 12.2 °C / 54 °F, relative humidity 52%.
July · good
In its favour: precipitation 45 mm / 1.8 in, share of daylight that is sunny 90%, days with heavy rain 1.1 days, wet days 7.6 days, average daily low 15.4 °C / 60 °F, relative humidity 53%.
Against: feels like (high) 31 °C / 88 °F, average daily high 30.7 °C / 87 °F.
August · good
In its favour: feels like (high) 29.3 °C / 85 °F, precipitation 29 mm / 1.1 in, share of daylight that is sunny 92%, days with heavy rain 0.5 days, wet days 6.6 days, average daily low 14.5 °C / 58 °F, relative humidity 53%.
Against: average daily high 29.7 °C / 85 °F.
September · best
In its favour: feels like (high) 23.8 °C / 75 °F, average daily high 25.7 °C / 78 °F, precipitation 37 mm / 1.4 in, share of daylight that is sunny 90%, wet days 4.9 days, days with heavy rain 1.1 days, average daily low 10.3 °C / 51 °F, relative humidity 52%.
October · best
In its favour: precipitation 34 mm / 1.3 in, share of daylight that is sunny 87%, feels like (high) 14.1 °C / 57 °F, average daily high 17.6 °C / 64 °F, days with heavy rain 1.1 days, wet days 6.4 days, relative humidity 56%.
Against: average daily low 3.5 °C / 38 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: best
- AApril: best
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: good
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- March–May, September–November
- Good
- June, August
Why these months
March · best
In its favour: average daily high 12.4 °C / 54 °F, precipitation 40 mm / 1.6 in, wet days 7 days, days with heavy rain 0.9 days, share of daylight that is sunny 88%, daylight per day 12 h, feels like (high) 8.6 °C / 47 °F, wind (daily max) 16 km/h / 10 mph.
Against: average daily low -2.1 °C / 28 °F.
April · best
In its favour: average daily high 16.1 °C / 61 °F, precipitation 54 mm / 2.1 in, days with heavy rain 1.2 days, wet days 8.9 days, feels like (high) 12.8 °C / 55 °F, share of daylight that is sunny 85%, daylight per day 13.3 h, average daily low 1.5 °C / 35 °F, wind (daily max) 18 km/h / 11 mph.
May · best
In its favour: average daily high 20.2 °C / 68 °F, precipitation 92 mm / 3.6 in, feels like (high) 18.3 °C / 65 °F, average daily low 6.5 °C / 44 °F, share of daylight that is sunny 83%, daylight per day 14.5 h, days with heavy rain 2.8 days, wet days 12.4 days, wind (daily max) 16 km/h / 10 mph.
June · good
In its favour: precipitation 44 mm / 1.7 in, days with heavy rain 1.1 days, wet days 8.4 days, average daily low 12.2 °C / 54 °F, share of daylight that is sunny 88%, daylight per day 15 h, wind (daily max) 16 km/h / 10 mph.
Against: average daily high 27.6 °C / 82 °F, feels like (high) 26.9 °C / 80 °F.
August · good
In its favour: precipitation 29 mm / 1.1 in, wet days 6.6 days, days with heavy rain 0.5 days, share of daylight that is sunny 92%, daylight per day 13.7 h, average daily low 14.5 °C / 58 °F, wind (daily max) 14 km/h / 9 mph.
Against: average daily high 29.7 °C / 85 °F, feels like (high) 29.3 °C / 85 °F.
September · best
In its favour: precipitation 37 mm / 1.4 in, wet days 4.9 days, days with heavy rain 1.1 days, average daily low 10.3 °C / 51 °F, share of daylight that is sunny 90%, daylight per day 12.4 h, feels like (high) 23.8 °C / 75 °F, wind (daily max) 14 km/h / 9 mph.
Against: average daily high 25.7 °C / 78 °F.
October · best
In its favour: average daily high 17.6 °C / 64 °F, precipitation 34 mm / 1.3 in, wet days 6.4 days, days with heavy rain 1.1 days, feels like (high) 14.1 °C / 57 °F, share of daylight that is sunny 87%, average daily low 3.5 °C / 38 °F, daylight per day 11.1 h, wind (daily max) 15 km/h / 9 mph.
November · best
In its favour: average daily high 11.4 °C / 53 °F, precipitation 21 mm / 0.8 in, wet days 4.8 days, days with heavy rain 0.3 days, share of daylight that is sunny 89%, feels like (high) 7.5 °C / 46 °F, wind (daily max) 13 km/h / 8 mph.
Against: average daily low -2.1 °C / 28 °F, daylight per day 9.9 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Eldora, 83 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 1.1 °C | 1.8 °C | 8.6 °C | 12.8 °C | 18.3 °C | 26.9 °C | 31 °C | 29.3 °C | 23.8 °C | 14.1 °C | 7.5 °C | 1.5 °C |
| Days with heavy rain | 0.3 days | 0.2 days | 0.9 days | 1.2 days | 2.8 days | 1.1 days | 1.1 days | 0.5 days | 1.1 days | 1.1 days | 0.3 days | 0.2 days |
| Time rain usually falls | 1 am | 1 am | 7 pm | 11 pm | 6 pm | 5 pm | 4 pm | 4 pm | 5 pm | 4 pm | 2 am | 11 pm |
| Sunshine per day | 8.5 h | 9.3 h | 10.5 h | 11.3 h | 11.9 h | 13.2 h | 13.2 h | 12.7 h | 11.1 h | 9.7 h | 8.8 h | 7.9 h |
| Relative humidity | 59% | 58% | 52% | 51% | 57% | 52% | 53% | 53% | 52% | 56% | 59% | 61% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 7.8 µg/m³ | 8.7 µg/m³ | 8.7 µg/m³ | 8.4 µg/m³ | 9 µg/m³ | 7.8 µg/m³ | 9.2 µg/m³ | 8.1 µg/m³ | 5.9 µg/m³ | 4.8 µg/m³ | 5.7 µg/m³ | 6.3 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 13.5 µg/m³ | 14.8 µg/m³ | 14.4 µg/m³ | 13.3 µg/m³ | 13.8 µg/m³ | 12 µg/m³ | 15.1 µg/m³ | 12 µg/m³ | 9.4 µg/m³ | 8 µg/m³ | 9.5 µg/m³ | 11.2 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.