Flagstaff is the county seat of Coconino County. According to the
United States Census Bureau, the city has a total area of , of which only (0.08%) is water. Flagstaff lies at approximately elevation, and is surrounded by the largest contiguous ponderosa pine forest in North America. It is in a mountainous area, and lies along the Rio de Flag watercourse. It is about north of the State capital, Phoenix. The geology of the area is in line with that of the
Colorado Plateau on which it lies, The San Francisco Peaks are a main aspect of Flagstaff's local geography and can be seen from everywhere in the city.
Humphreys Peak is the highest point in Arizona at . Several trails around the peaks provide views of the Grand Canyon. While the most popular access point is
Arizona Snowbowl (southwest face), the peaks can also be approached from the north and east. The peaks are about northwest of downtown Flagstaff, with the Snowbowl resort just southwest of Humphreys Peak. A soft basalt layer covers some of the rock at the surface. Moenkopi Formation red sandstone is a distinctive feature of Flagstaff, as it was used as a building material from the 1880s because of its fire retardant properties. The source used for quarrying most of this rock was a deposit 1 mile east of the town, which fell under the control of Charles Begg in 1887, who then began selling the stone across the southwest – after he made a successful sale in California that expanded the business, he was replaced in 1888 by a master quarryman. While it was used as building material across the West, some of Flagstaff's most prominent buildings are famous for the stone, including the Bank Hotel,
Climate , 2016)|alt=See caption Flagstaff's climate type on the
Köppen climate classification system is variously reported as a
warm dry-summer Mediterranean climate (
Csb), a
Hemiboreal climate (
Dsb), and a
cold semi-arid climate (
BSk). It is consistently described as "semi-arid". Flagstaff's Köppen type is recorded as
Dsb in the city center, with areas of
BSk,
Csb,
Csa (
hot-summer Mediterranean),
Cwa (
monsoon-influenced humid subtropical),
Cwb (
subtropical highland),
Dwa (
monsoon-influenced hot summer humid continental),
Dwb (
monsoon-influenced warm summer humid continental), and
Dsa (
Mediterranean-influenced hot summer humid continental) on the outskirts and bordering the city; it is mostly
Dsb,
BSk, and
Csb. The hottest temperature on record is in July 1973. This is far below a normal summer day in lowland areas of the state. The coldest temperature on record is in January 1937. with Flagstaff's wettest months being July and August, and its driest being June, all in the summer; Mediterranean climate categorization does not consider snowfall. Semi-arid climates will receive of annual rainfall, while Flagstaff experiences more. Flagstaff's
hardiness zone is mostly 6a, with some areas 5b, meaning plants withstand temperatures down to . It is in the Transition
life zone; the concept of life zones was first observed in the Flagstaff area. Wind in Flagstaff typically blows southwesterly throughout the year, based on topographical features. The city receives precipitation every year, with two distinct wet periods in the summer and winter; the summer monsoon season accounts for 34% of annual rainfall, with the winter producing 28%. The summer monsoon season, originating from the Mexican monsoon period, is also wetter than winter, with an average compared to the winter's . Before the summer monsoon each year there is a dry period in May and June. Long-term average precipitation is annually, with much heavier rainfall attributed to
El Niño events. Comparatively,
La Niña events have caused below-average rainfall. and was still ranked as the United States' third-snowiest city in 2020 (based on 2018–19
National Oceanic and Atmospheric Administration data). Flagstaff has consistently been among the snowiest cities in the United States, and snow and winter culture is argued by Michael Weeks to be a large part of Flagstaff's identity. The earliest seasonal trace of snowfall occurred on September 19, 1965, and the latest on May 29 in both 1971 and 1990. Though one of the least-sunny cities in Arizona, Flagstaff still ranks among the United States' sunniest cities, having sunshine for an average 78% of the year.
Seasonal weather There are four seasons in Flagstaff, with cool to cold winter temperatures averaging and warm summer temperatures averaging , much cooler than much of Arizona; the average annual snowfall is . Fall lasts only until the snow comes in November, with winter marked between periods of snowfall, typically from November until mid-April at the latest. Temperatures in winter are usually below freezing, going no higher than around in the day, even in sunshine. Nights can regularly plummet below . A combination of snow cover and
high pressure occurring during winter months will cause the temperature to drop further, once reaching a record low of . Flagstaff's winter wet season is caused by Pacific storms and lasts from November through April. Tree species abound the area, which covers three arboreal life zones:
Douglas fir and aspen forest,
Ponderosa pine forest, and
Pinyon-juniper woodland. The Coconino National Forest and Flagstaff are within the largest contiguous ponderosa pine forest in North America. The
arboretum in Flagstaff has an extensive regional collection of the
Penstemon genus and hosts an annual Penstemon Festival. Coconino is also home to a variety of bird species, which is further diversified by species from desert climates south of the Mogollon Rim still mixing in the area. The nearby lakes also attract wildlife. Birds that live around or visit Flagstaff include the
thick-billed kingbird, only documented in the area since 2016, the
red-faced warbler, a
Madrean species, and waterfowl including the
Eurasian wigeon and
American wigeon.
Cityscape Flagstaff has a diverse cityscape and exists in distinct areas.
Downtown Flagstaff is a "narrow and slender" area between the NAU campus at its south and the
Museum of Northern Arizona at the north. Flagstaff is a smaller city, so its downtown is largely local and independent. The city's mall is found in East Flagstaff, as is a
Harkins movie theater and a
country club and golf course. Residential properties in East Flagstaff are larger and more rural than other parts of the city. North West Flagstaff is directly north of downtown, and is where the Snowbowl and Museum of Northern Arizona are found. West Flagstaff encompasses the area south and west of downtown, including NAU and the
Lake Mary neighborhood. It also covers the airport and
Fort Tuthill (county park and the Pepsi Amphitheater), being bordered to the south by the urban areas of
Kachina Village and
Mountainaire. Outside of the city proper, these urban areas have a "mountain-town feel". Flagstaff has an "urban forest park", Buffalo Park, which sits on top of McMillan Mesa and used to be home to a zoo in the 1960s. Buffalo Park/McMillan Mesa bisects the city, separating East Flagstaff from West Flagstaff and downtown. ==Demographics==