Flagstaff weather in January

In January, Flagstaff sees average daytime highs of 41°F and overnight lows near 22°F, with 1.8 in of precipitation across 6.3 wet days and about 9.9 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 41°F through the month. The sky is clear or mostly clear about 50% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Flagstaff's 8th-clearest and 8th-windiest month. For the whole year in context, see Flagstaff's year-round climate.

Daytime high
41°
11th warmest
Overnight low
22°
1st coldest
Precipitation
1.8 in
6.3 wet days
Daylight
9 h 54 min
7:40 AM – 5:32 PM
Cloud cover
43%
8th clearest
Wind
5 mph
8th windiest
Solar energy
3.41 kWh/m²
Travel score
0.1
out of 10

Flagstaff is city in and county seat of Coconino County, Arizona, United States.

Density
425/km²
people per km²
Founded
1876

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 41°F through the month.

A typical January day in Flagstaff reaches about 41°F in the afternoon and slips back to 22°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 31°F and 51°F. Set against its neighbours, January runs on par with December and about 3°F cooler than February.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14020
24020
34021
44021
54021
64021
74021
84021
94021
104121
114121
124122
134122
144122
154122
164122
174122
184122
194122
204122
214122
224122
234122
244122
254222
264222
274222
284222
294222
304222
314222

How January really feels in Flagstaff

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
31
9 feel bitter (≤ 14°F)

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Flagstaff weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 22°1.86.35.69.90.1
Feb44° / 24°2.06.96.110.70.8
Mar50° / 28°1.97.35.111.72.6
Apr58° / 33°1.25.6312.94.9
May67° / 42°1.35.70.813.87.2
Jun78° / 51°0.43014.38.3
Jul80° / 57°4.514.8014.16.0
Aug77° / 55°5.016.4013.36.0
Sep72° / 50°2.38.8012.27.3
Oct62° / 40°1.35.20.911.16.4
Nov50° / 29°1.34.1310.12.9
Dec41° / 22°1.65.85.69.70.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56337
66337
76337
86337
96337
106436
116337
126436
136436
146337
156436
166337
176337
186337
196238
206238
216238
226238
236238
246238
256238
266238
276238
286238
296238
306238
316238

Chance of precipitation in January

Any precipitationSnow

Flagstaff gets around 1.8 in of rain and snow over 6.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 20% and peaks near 21% on the wettest days, and about 6 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
12120
22120
32119
42119
52119
62119
72119
82119
92018
102018
112018
122018
132018
142017
152017
162017
172017
182017
192018
202018
212018
222018
232018
242018
252017
262017
272017
282017
292017
301917
311917

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 5 mph in January.

Across January, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:40 AM to 7:33 AM, and sunset from 5:20 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:405:20
29.77:405:20
39.77:405:21
49.77:405:22
59.77:405:23
69.77:405:23
79.77:415:24
89.77:415:25
99.87:415:26
109.87:415:27
119.87:405:28
129.87:405:28
139.87:405:29
149.87:405:30
159.97:405:31
169.97:405:32
179.97:405:33
189.97:395:34
199.97:395:35
2010.07:395:36
2110.07:385:37
2210.07:385:38
2310.07:385:39
2410.07:375:40
2510.17:375:41
2610.17:365:42
2710.17:365:43
2810.17:355:44
2910.27:345:45
3010.27:345:46
3110.27:335:47

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.41 kWh/m².

For context, solar energy here swings from a low near 3.08 kWh/m² to a high of 8.41 kWh/m² in June across the year — January's 3.41 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.2Moderate
63.2Moderate
73.2Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.7Moderate
263.7Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.9Moderate
313.9Moderate
Planning a trip in January

Hazard calendar for Flagstaff

In seasonPeak

None of Flagstaff's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Flagstaff's rainy season runs July–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Flagstaff?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.1
Sightseeing
12th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Flagstaff.

What to pack for Flagstaff in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Flagstaff sees daytime highs around 41°F and nights near 22°F. Pack a warm layer and a heavy coat. About 6 days see rain.

a warm layera heavy coat

UV index in Flagstaff in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Flagstaff peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 12Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr6High
May8Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Flagstaff in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Flagstaff is worst in June — around 23 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (December, 5 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJun 1621 µg/m³Dec 216 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb6Good
Mar7Good
Apr10Good
May11Good
Jun23Moderate
Jul10Good
Aug8Good
Sep13Moderate
Oct16Moderate
Nov12Good
Dec5Good
Location & terrain

Where is Flagstaff?

Flagstaff sits at 35.2°N, 111.7°W, 6,903 ft above sea level, in United States. The nearest listed city is Sedona, 24 mi away.

Topography around Flagstaff

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Flagstaff.

Within 2 miles, the terrain around Flagstaff has only modest variations in elevation — a maximum elevation change of 643 ft around an average of 7,014 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 6,017 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,577 ft.

The land around Flagstaff is covered by trees (56%) and artificial surfaces (33%) within 2 miles, trees (76%) within 10 miles, and grassland (38%) and trees (36%) within 50 miles.

2 miles
643 ft
10 miles
6,017 ft
50 miles
9,577 ft
treesshrubsgrasslandartificial surfacesbare terrain
January weather nearby: Sedona 24 mi · Prescott Valley 55 mi · Prescott 65 mi · Grand Canyon 65 mi · Payson 70 mi · Anthem 96 mi · Deer Valley 108 mi · Fountain Hills 110 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Flagstaff (35.1981°, -111.6513°, elevation 6,903 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).