Phoenix, AZ weather in January
January in Phoenix: mild and mostly dry. Highs 68°F, lows 46°F, about 4 wet days. It is one of the coolest months in Phoenix. A great month for outdoor plans.
- Normal high
- 68°F
- Normal low
- 46°F
- Wet days
- 4
- 0.9 in total
- Muggy days
- 0
- dew point 65°F+
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 66°F | 69°F |
| Normal low | 45°F | 47°F |
| Chance of a wet day | 13% | 12% |
| Sunrise / sunset | 7:32 am / 5:31 pm | 7:24 am / 5:58 pm |
| Daylight | 10.0 h | 10.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Arizona time (no daylight saving)).
A typical January day
- 6 am48°Fdew point 33°F
- 9 am51°Fdew point 33°F
- Noon61°Fdew point 31°F
- 3 pm66°Fdew point 29°F
- 6 pm64°Fdew point 30°F
- 9 pm57°Fdew point 33°F
NOAA hourly normals (local standard time) from Phoenix Sky Harbor Intl Airport (4 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F21 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow4 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain in January
Normal precipitation is 0.9 in; a dry January brings about 0.1 in and a wet one about 1.4 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How January varies from year to year
- Warmest January, 1991-20202003: average high 75°F
- Coolest January1995: average high 63°F
- Wettest January1993: 5.2 in
- Driest January2006: no measurable precipitation
- Highest reading86°F (January 31, 2003)
- Lowest reading29°F (January 15, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
January compared with December and February
| December | January | February | |
|---|---|---|---|
| Normal high | 66°F | 68°F | 71°F |
| Normal low | 45°F | 46°F | 49°F |
| Wet days | 4 | 4 | 4 |
| Comfortable days | 19 | 21 | 19 |
| Daylight | 10.0 h | 10.2 h | 11.0 h |
Highs change by +2°F from December and +3°F into February.
Nearby alternatives in January
- Cooler: Sedona, AZ100 mi · high 58°F · 6 wet days
How Phoenix ranks in January
- Normal high50th warmest of 378 cities; 4th of 13 in Arizona
- Wet days17th driest of 378
- Comfortable days6th most of 339
Heating and cooling
January has 256 heating degree days and 2 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is Phoenix in January?
The normal high is 68°F and the normal low is 46°F. From 1991 to 2020 the coldest January reading was 29°F (most recently on January 15, 2013).
Does it rain a lot in Phoenix in January?
About 4 days in January have at least 0.01 in of precipitation, and the normal total is 0.9 in. The wettest January in 1991-2020 was in 1993 (5.2 in); the driest was in 2006, with no measurable precipitation.
Is January a good time to visit Phoenix?
January ranks 2nd of 12 months on our comfort score for Phoenix (73 out of 100). It has about 21 comfortable days. The best months are January and February.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: Phoenix Sky Harbor Intl Airport (USW00023183), 4.3 mi ESE of the city center, 1,107 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Tempe ASU (USC00028499), 8.9 mi E of the city center, 1,167 ft (79 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Phoenix Sky Harbor Intl Airport (722780-23183), 4.3 mi ESE of the city center, 1,113 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).