Flagstaff weather by month & the best time to visit
United States · alpine / mountain town · Mediterranean climate
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The best time to visit Flagstaff is June — its sunniest month (Sunshine Score 99/100), with May and September close behind. Flagstaff averages about 3,666 hours of sunshine a year. Daytime highs around 29°C / 84°F and roughly 6 mm of rain in June.
When is the best time to visit Flagstaff?
For sunshine, the best time to visit Flagstaff is June, then May and September. The dullest month is January (0/100, 47 mm of rain). The full month-by-month picture is in the table below.
How sunny is Flagstaff?
Flagstaff is one of the sunniest places on Earth: about 3,666 hours of sunshine a year. 99 Sunshine Score points separate June (99) from January (0), so the month you pick matters. It ranks #18 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 456 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | -7° / 19°F | 47 mm | 3 |
| February | 0 | 7° / 45°F | -6° / 21°F | 48 mm | 5 |
| March | 31 | 12° / 54°F | -3° / 27°F | 33 mm | 7 |
| April | 73 | 17° / 63°F | 0° / 32°F | 18 mm | 9 |
| May | 97 | 22° / 72°F | 5° / 41°F | 15 mm | 10 |
| June | 99 | 29° / 84°F | 10° / 50°F | 6 mm | 12 |
| July | 87 | 29° / 84°F | 14° / 57°F | 69 mm | 11 |
| August | 88 | 28° / 82°F | 13° / 55°F | 68 mm | 10 |
| September | 93 | 25° / 77°F | 9° / 48°F | 37 mm | 9 |
| October | 79 | 18° / 64°F | 3° / 37°F | 31 mm | 6 |
| November | 23 | 11° / 52°F | -3° / 27°F | 33 mm | 4 |
| December | 0 | 5° / 41°F | -7° / 19°F | 51 mm | 3 |
Nearest destinations
Flagstaff: questions and answers
What kind of destination is Flagstaff?
Flagstaff is a alpine / mountain town in United States at 2,133 m elevation with a Mediterranean climate.
How many hours of sunshine does Flagstaff get a year?
Flagstaff gets about 3,666 hours of sunshine a year, at its best around June.
When is the best time to visit Flagstaff?
The sunniest time to visit Flagstaff is June, when the Sunshine Score peaks at 99/100 (with May and September close behind). Expect daytime highs around 29°C / 84°F.
What is the least sunny month in Flagstaff?
January is the least sunny month in Flagstaff, scoring 0/100 with about 47 mm of rain.
How strong is the sun in Flagstaff?
The typical midday UV index in Flagstaff peaks around 12 (extreme) in June, easing to about 3 (moderate) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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