Flagstaff weather in January: Flagstaff, Arizona: normal highs, lows, rain and records for January
Flagstaff in January has a normal high of 43°F and a normal low of 18°F, a daily mean of 31°F, rising from 42°F on the 1st to 44°F by the 31st. Measurable precipitation falls on 7 days in a normal January, 2.05 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −8°C, 52 mm of precipitation and 53 cm of snow in January.
- NOAA stationFlagstaff Airport
- Station IDUSW00003103
- Location35.14°N 111.67°W
- Elevation7,003 ft (2,135 m)
- Population77,539
- Jan 43° 18°
- Feb 46° 20°
- Mar 52° 24°
- Apr 59° 28°
- May 68° 35°
- Jun 79° 43°
- Jul 82° 51°
- Aug 79° 51°
- Sep 74° 43°
- Oct 64° 32°
- Nov 52° 23°
- Dec 43° 17°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Flagstaff in January?
The normal high is 43°F and the normal low 18°F, for a daily mean of 30.5°F. January is 0.5°F warmer than December and 2.1°F cooler than February. January is the 11th warmest month of the year in Flagstaff and the 4th wettest, and the snowiest. Across the month the normal high rises 2°F, from 42°F on January 1 to 44°F on January 31. From one year to the next January's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 27°F and 34°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 42°F | 17°F | 23% | 14% |
| January 8 | 43°F | 17°F | 23% | 14% |
| January 15 | 43°F | 18°F | 22% | 13% |
| January 22 | 44°F | 18°F | 23% | 13% |
| January 31 | 44°F | 18°F | 24% | 13% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 42°F | 17°F | 23% | 14% | 9 h 50 min |
| January 2 | 42°F | 17°F | 23% | 14% | 9 h 50 min |
| January 3 | 42°F | 17°F | 23% | 14% | 9 h 50 min |
| January 4 | 42°F | 17°F | 23% | 14% | 9 h 50 min |
| January 5 | 43°F | 17°F | 23% | 14% | 9 h 50 min |
| January 6 | 43°F | 17°F | 23% | 14% | 9 h 50 min |
| January 7 | 43°F | 17°F | 23% | 14% | 9 h 50 min |
| January 8 | 43°F | 17°F | 23% | 14% | 9 h 50 min |
| January 9 | 43°F | 17°F | 22% | 14% | 10 h |
| January 10 | 43°F | 17°F | 22% | 14% | 10 h |
| January 11 | 43°F | 17°F | 22% | 14% | 10 h |
| January 12 | 43°F | 17°F | 22% | 13% | 10 h |
| January 13 | 43°F | 18°F | 22% | 13% | 10 h |
| January 14 | 43°F | 18°F | 22% | 13% | 10 h |
| January 15 | 43°F | 18°F | 22% | 13% | 10 h |
| January 16 | 44°F | 18°F | 22% | 13% | 10 h |
| January 17 | 44°F | 18°F | 22% | 13% | 10 h |
| January 18 | 44°F | 18°F | 22% | 13% | 10 h 10 min |
| January 19 | 44°F | 18°F | 22% | 13% | 10 h 10 min |
| January 20 | 44°F | 18°F | 22% | 13% | 10 h 10 min |
| January 21 | 44°F | 18°F | 23% | 13% | 10 h 10 min |
| January 22 | 44°F | 18°F | 23% | 13% | 10 h 10 min |
| January 23 | 44°F | 18°F | 23% | 13% | 10 h 10 min |
| January 24 | 44°F | 18°F | 23% | 13% | 10 h 10 min |
| January 25 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 26 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 27 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 28 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 29 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 30 | 44°F | 18°F | 23% | 13% | 10 h 20 min |
| January 31 | 44°F | 18°F | 24% | 13% | 10 h 30 min |
- Normal high
- 43°FJanuary average
- Normal low
- 18°FJanuary average
- Precipitation
- 2.05 inmonth total
- Days with precipitation
- 70.01 inch or more
- Snowfall
- 20.9 inmonth total
- Nights at 32°F or colder
- 31
- Daylight
- 9 h 50 min to 10 h 30 minJanuary 1 to January 31
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003103; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Flagstaff in January?
On a given January day the chance of 0.01 inch or more is 23% on average, highest around January 31 (24%). In all, 2.05 in falls on 7 days of a normal January.
In a normal January in Flagstaff, 31 nights fall to freezing, 3 days stay below freezing all day and snowfall averages 20.9 inches.
Snow falls on 6 days in a normal January, and an inch or more covers the ground on 20 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003103.
What are the records for January in Flagstaff?
The warmest January temperature on Flagstaff's official record (since 1898) is 66°F, on January 30, 1971; the coldest is −30°F, on January 22, 1937. The wettest January brought 9.55 in (1993); the snowiest, 104.8 inches (1949).
The January mean against the 1991-2020 normal of 30.5°F: 2021 29.9°F (−0.6), 2022 30.7°F (+0.2), 2023 26.5°F (−4.0), 2024 30.7°F (+0.2), 2025 28.4°F (−2.1), 2026 34.3°F (+3.8). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 29.9°F | −0.6°F | 4.16 in |
| 2022 | 30.7°F | +0.2°F | 0.17 in |
| 2023 | 26.5°F | −4.0°F | 5.87 in |
| 2024 | 30.7°F | +0.2°F | 1.53 in |
| 2025 | 28.4°F | −2.1°F | 0.19 in |
| 2026 | 34.3°F | +3.8°F | 1.01 in |
Source: records: ACIS, NWS threaded record FLGthr; recent months: ACIS, station USW00003103. Records and recent months use complete months only.
How does January in Flagstaff compare across Arizona?
Across the 97 places PlainClimate covers in Arizona, January normal highs run from 39°F in Lukachukai to 71°F in Gila Bend; Flagstaff's is 43°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.