Flagstaff weather by month
Average highs run from 43°F in January to 82°F in July, and January nights average 18°F. It gets 20 inches of rain and melted snow a year and 90 inches of snow. Nights drop below freezing about 202 times a year. The most comfortable months are June to September.
Best time to visit Flagstaff
For comfortable weather, go in June to September. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 43°F | 18°F | 2.1 in | 20.9 in | 4 | 0 | 31 | cold |
| February | 46°F | 20°F | 2.2 in | 19.3 in | 5 | 0 | 27 | cold |
| March | 52°F | 24°F | 1.9 in | 15.6 in | 4 | 0 | 29 | cool |
| April | 59°F | 28°F | 0.9 in | 5.0 in | 2 | 0 | 24 | cool |
| May | 68°F | 35°F | 0.8 in | 1.1 in | 2 | 0 | 12 | mild days, chilly nights |
| June | 79°F | 43°F | 0.3 in | 0.0 in | 1 | 1 | 2 | warm |
| July | 82°F | 51°F | 2.6 in | 0.0 in | 6 | 2 | 0 | warm |
| August | 79°F | 51°F | 3.0 in | 0.0 in | 7 | 1 | 0 | warm |
| September | 74°F | 43°F | 1.8 in | 0.0 in | 4 | 0 | 2 | mild |
| October | 64°F | 32°F | 1.5 in | 1.5 in | 3 | 0 | 18 | mild days, chilly nights |
| November | 52°F | 23°F | 1.6 in | 8.2 in | 3 | 0 | 28 | cool |
| December | 43°F | 17°F | 1.9 in | 18.5 in | 4 | 0 | 30 | cold |
| Year | 62°F avg | 32°F avg | 20.5 in | 90.1 in | 46 | 3 | 202 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Flagstaff Pulliam Airport, AZ (USW00003103), 3.8 miles from the city center. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Flagstaff
The shortest day is December 21, with 9h 47m of daylight; the longest is June 21, with 14h 31m. The earliest sunset comes around December 4 (5:13 pm) and the latest around June 20 (7:44 pm). The sun never sets after 8 pm here.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:34 am | 5:37 pm | 10h 03m |
| February | 7:12 am | 6:09 pm | 10h 56m |
| March | 6:37 am | 6:34 pm | 11h 57m |
| April | 5:54 am | 6:59 pm | 13h 05m |
| May | 5:22 am | 7:23 pm | 14h 01m |
| June | 5:11 am | 7:42 pm | 14h 31m |
| July | 5:23 am | 7:41 pm | 14h 17m |
| August | 5:46 am | 7:14 pm | 13h 28m |
| September | 6:09 am | 6:33 pm | 12h 23m |
| October | 6:33 am | 5:51 pm | 11h 18m |
| November | 7:01 am | 5:20 pm | 10h 18m |
| December | 7:28 am | 5:15 pm | 9h 48m |
Calculated for 2026 at the center of Flagstaff with NOAA's solar equations, in local clock time (Mountain Standard Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Flagstaff getting warmer?
The last 10 years averaged 2.7°F warmer than the 20th century. See the climate stripes for Flagstaff.Frequently asked questions
What is the warmest month in Flagstaff?
July is the warmest month, with an average high of 82°F and an average low of 51°F (NOAA 1991-2020 normals).
What is the coldest month in Flagstaff?
December is the coldest, with average lows of 17°F and highs of 43°F.
What is the rainiest month in Flagstaff?
August gets the most precipitation, 3.0 inches on average. June is the driest at 0.3 inches.
Does it snow in Flagstaff?
Yes. Flagstaff averages 90 inches of snow a year.
When is the best time to visit Flagstaff?
For comfortable weather, June to September. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Flagstaff?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Flagstaff profile.
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