Best time to visit Flagstaff
The best time to visit Flagstaff is May–June and September–October, judged on twenty years of weather records and the events worth going for.
Flagstaff, Arizona, 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 | 4.8 °C / 41 °F | -6 °C / 21 °F | 46 mm / 1.8 in | neither best nor good |
| February | 6.8 °C / 44 °F | -4.5 °C / 24 °F | 41 mm / 1.6 in | neither best nor good |
| March | 10 °C / 50 °F | -1.9 °C / 29 °F | 53 mm / 2.1 in | neither best nor good |
| April | 15 °C / 59 °F | 1.2 °C / 34 °F | 22 mm / 0.8 in | good month |
| May | 19.7 °C / 67 °F | 5.6 °C / 42 °F | 29 mm / 1.1 in | best month |
| June | 27.1 °C / 81 °F | 11.6 °C / 53 °F | 15 mm / 0.6 in | best month |
| July | 27.3 °C / 81 °F | 14.6 °C / 58 °F | 135 mm / 5.3 in | good month |
| August | 25.8 °C / 78 °F | 13.5 °C / 56 °F | 110 mm / 4.3 in | good month |
| September | 23 °C / 73 °F | 10.2 °C / 50 °F | 56 mm / 2.2 in | best month |
| October | 17.3 °C / 63 °F | 4.7 °C / 40 °F | 34 mm / 1.3 in | best month |
| November | 11.1 °C / 52 °F | -0.7 °C / 31 °F | 29 mm / 1.1 in | neither best nor good |
| December | 5.6 °C / 42 °F | -5.1 °C / 23 °F | 46 mm / 1.8 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: neither
- AApril: good
- MMay: best
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: best
- OOctober: best
- NNovember: neither
- DDecember: neither
- Best
- May–June, September–October
- Good
- April, July–August
Why these months
April · good
In its favour: precipitation 22 mm / 0.8 in, share of daylight that is sunny 96%, wet days 4.5 days, days with heavy rain 0.5 days, average daily high 15 °C / 59 °F, relative humidity 40%.
Against: feels like (high) 11.3 °C / 52 °F, average daily low 1.2 °C / 34 °F.
May · best
In its favour: feels like (high) 16.5 °C / 62 °F, average daily high 19.7 °C / 67 °F, precipitation 29 mm / 1.1 in, share of daylight that is sunny 94%, wet days 5.7 days, days with heavy rain 0.7 days, relative humidity 35%, average daily low 5.6 °C / 42 °F.
June · best
In its favour: feels like (high) 24.3 °C / 76 °F, precipitation 15 mm / 0.6 in, share of daylight that is sunny 96%, average daily high 27.1 °C / 81 °F, wet days 3.2 days, days with heavy rain 0.3 days, average daily low 11.6 °C / 53 °F, relative humidity 25%.
July · good
In its favour: feels like (high) 26.9 °C / 80 °F, share of daylight that is sunny 90%, average daily high 27.3 °C / 81 °F, average daily low 14.6 °C / 58 °F, relative humidity 48%.
Against: wet days 16.1 days, precipitation 135 mm / 5.3 in, days with heavy rain 5.3 days.
August · good
In its favour: feels like (high) 25.3 °C / 78 °F, average daily high 25.8 °C / 78 °F, share of daylight that is sunny 93%, precipitation 110 mm / 4.3 in, average daily low 13.5 °C / 56 °F, relative humidity 54%, days with heavy rain 3.9 days.
Against: wet days 15.3 days.
September · best
In its favour: feels like (high) 21 °C / 70 °F, average daily high 23 °C / 73 °F, precipitation 56 mm / 2.2 in, share of daylight that is sunny 95%, days with heavy rain 1.6 days, wet days 8.8 days, average daily low 10.2 °C / 50 °F, relative humidity 49%.
October · best
In its favour: precipitation 34 mm / 1.3 in, share of daylight that is sunny 94%, average daily high 17.3 °C / 63 °F, feels like (high) 13.7 °C / 57 °F, wet days 5.1 days, days with heavy rain 0.9 days, relative humidity 47%, average daily low 4.7 °C / 40 °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: best
- JJuly: neither
- AAugust: neither
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- March–June, September–November
Why these months
March · best
In its favour: precipitation 53 mm / 2.1 in, average daily high 10 °C / 50 °F, wet days 7.2 days, days with heavy rain 1.6 days, share of daylight that is sunny 92%, daylight per day 12 h, wind (daily max) 18 km/h / 11 mph, feels like (high) 6.2 °C / 43 °F.
Against: average daily low -1.9 °C / 29 °F.
April · best
In its favour: average daily high 15 °C / 59 °F, precipitation 22 mm / 0.8 in, wet days 4.5 days, days with heavy rain 0.5 days, feels like (high) 11.3 °C / 52 °F, share of daylight that is sunny 96%, daylight per day 13.1 h, average daily low 1.2 °C / 34 °F, wind (daily max) 19 km/h / 12 mph.
May · best
In its favour: average daily high 19.7 °C / 67 °F, precipitation 29 mm / 1.1 in, wet days 5.7 days, days with heavy rain 0.7 days, feels like (high) 16.5 °C / 62 °F, average daily low 5.6 °C / 42 °F, share of daylight that is sunny 94%, daylight per day 14 h, wind (daily max) 18 km/h / 11 mph.
June · best
In its favour: precipitation 15 mm / 0.6 in, wet days 3.2 days, days with heavy rain 0.3 days, average daily low 11.6 °C / 53 °F, share of daylight that is sunny 96%, daylight per day 14.5 h, feels like (high) 24.3 °C / 76 °F, wind (daily max) 18 km/h / 11 mph.
Against: average daily high 27.1 °C / 81 °F.
September · best
In its favour: average daily high 23 °C / 73 °F, precipitation 56 mm / 2.2 in, days with heavy rain 1.6 days, wet days 8.8 days, feels like (high) 21 °C / 70 °F, average daily low 10.2 °C / 50 °F, share of daylight that is sunny 95%, daylight per day 12.4 h, wind (daily max) 14 km/h / 8 mph.
October · best
In its favour: average daily high 17.3 °C / 63 °F, precipitation 34 mm / 1.3 in, wet days 5.1 days, days with heavy rain 0.9 days, feels like (high) 13.7 °C / 57 °F, average daily low 4.7 °C / 40 °F, share of daylight that is sunny 94%, daylight per day 11.3 h, wind (daily max) 15 km/h / 9 mph.
November · best
In its favour: average daily high 11.1 °C / 52 °F, precipitation 29 mm / 1.1 in, wet days 3.5 days, days with heavy rain 0.8 days, share of daylight that is sunny 92%, wind (daily max) 14 km/h / 9 mph, feels like (high) 6.7 °C / 44 °F, daylight per day 10.3 h, average daily low -0.7 °C / 31 °F.
Skiing and snow
Wants cold and snowfall; sunshine barely matters.
- JJanuary: best
- FFebruary: best
- MMarch: best
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: good
- DDecember: best
- Best
- December–March
- Good
- November
Why these months
January · best
In its favour: snowfall 27 cm / 10.6 in, days with snow 7.8 days, average daily low -6 °C / 21 °F, wind (daily max) 14 km/h / 8 mph, daylight per day 10.1 h.
Against: average daily high 4.8 °C / 41 °F.
February · best
In its favour: snowfall 24 cm / 9.6 in, days with snow 7.1 days, average daily low -4.5 °C / 24 °F, wind (daily max) 16 km/h / 10 mph, daylight per day 10.9 h.
Against: average daily high 6.8 °C / 44 °F.
March · best
In its favour: snowfall 25 cm / 10 in, days with snow 7.7 days, average daily low -1.9 °C / 29 °F, wind (daily max) 18 km/h / 11 mph, daylight per day 12 h.
Against: average daily high 10 °C / 50 °F.
November · good
In its favour: average daily low -0.7 °C / 31 °F, wind (daily max) 14 km/h / 9 mph, daylight per day 10.3 h.
Against: snowfall 11 cm / 4.4 in, average daily high 11.1 °C / 52 °F, days with snow 3.7 days.
December · best
In its favour: snowfall 26 cm / 10 in, days with snow 7.7 days, average daily low -5.1 °C / 23 °F, wind (daily max) 14 km/h / 9 mph, daylight per day 9.8 h.
Against: average daily high 5.6 °C / 42 °F.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Arizona Snowbowl, 15 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) | 0.4 °C | 2.5 °C | 6.2 °C | 11.3 °C | 16.5 °C | 24.3 °C | 26.9 °C | 25.3 °C | 21 °C | 13.7 °C | 6.7 °C | 1.1 °C |
| Days with heavy rain | 1.4 days | 1.6 days | 1.6 days | 0.5 days | 0.7 days | 0.3 days | 5.3 days | 3.9 days | 1.6 days | 0.9 days | 0.8 days | 1.6 days |
| Time rain usually falls | 3 pm | 4 pm | 3 pm | 4 pm | 3 pm | 4 pm | 3 pm | 3 pm | 3 pm | 2 pm | 2 pm | 1 am |
| Sunshine per day | 8.9 h | 10.1 h | 11 h | 12.6 h | 13.2 h | 13.9 h | 12.7 h | 12.5 h | 11.7 h | 10.6 h | 9.5 h | 8.4 h |
| Relative humidity | 59% | 55% | 52% | 40% | 35% | 25% | 48% | 54% | 49% | 47% | 49% | 58% |
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 | 4.3 µg/m³ | 4.8 µg/m³ | 5.3 µg/m³ | 4.9 µg/m³ | 5.5 µg/m³ | 5.5 µg/m³ | 4.9 µg/m³ | 4.8 µg/m³ | 4 µg/m³ | 3.7 µg/m³ | 4.2 µg/m³ | 3.8 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 8.1 µg/m³ | 7.8 µg/m³ | 8.6 µg/m³ | 7.9 µg/m³ | 9.2 µg/m³ | 9.3 µg/m³ | 7.7 µg/m³ | 7.4 µg/m³ | 6.2 µg/m³ | 6.1 µg/m³ | 7.2 µg/m³ | 6.3 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.