Phoenix weather in December: Phoenix, Arizona: normal highs, lows, rain and records for December
Phoenix in December has a normal high of 66°F and a normal low of 45°F, a daily mean of 56°F, falling from 69°F on the 1st to 66°F by the 31st. Measurable precipitation falls on 4 days in a normal December, 0.74 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 7°C, 19 mm of precipitation in December.
- NOAA stationPhoenix Sky Harbor International Airport
- Station IDUSW00023183
- Location33.43°N 112.00°W
- Elevation1,107 ft (337 m)
- From the center11 miles
- Population1,673,164
- Jan 68° 46°
- Feb 71° 49°
- Mar 78° 55°
- Apr 86° 61°
- May 95° 70°
- Jun 104° 79°
- Jul 107° 85°
- Aug 105° 84°
- Sep 100° 78°
- Oct 89° 66°
- Nov 77° 54°
- Dec 66° 45°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Phoenix in December?
The normal high is 66°F and the normal low 45°F, for a daily mean of 55.8°F. December is 9.3°F cooler than November and 1.0°F cooler than January. December is the 12th warmest month of the year in Phoenix and the 6th wettest. Across the month the normal high falls 3°F, from 69°F on December 1 to 66°F on December 31. From one year to the next December's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 54°F and 58°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 13%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 69°F | 48°F | 11% | 5% |
| December 8 | 67°F | 46°F | 12% | 6% |
| December 15 | 66°F | 45°F | 12% | 7% |
| December 22 | 65°F | 44°F | 13% | 7% |
| December 31 | 66°F | 45°F | 13% | 7% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 20)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 69°F | 48°F | 11% | 5% | 10 h 10 min |
| December 2 | 69°F | 48°F | 11% | 6% | 10 h 10 min |
| December 3 | 69°F | 47°F | 11% | 6% | 10 h 10 min |
| December 4 | 68°F | 47°F | 11% | 6% | 10 h |
| December 5 | 68°F | 47°F | 11% | 6% | 10 h |
| December 6 | 68°F | 47°F | 11% | 6% | 10 h |
| December 7 | 67°F | 46°F | 11% | 6% | 10 h |
| December 8 | 67°F | 46°F | 12% | 6% | 10 h |
| December 9 | 67°F | 46°F | 12% | 6% | 10 h |
| December 10 | 67°F | 46°F | 12% | 6% | 10 h |
| December 11 | 66°F | 45°F | 12% | 6% | 10 h |
| December 12 | 66°F | 45°F | 12% | 6% | 10 h |
| December 13 | 66°F | 45°F | 12% | 7% | 10 h |
| December 14 | 66°F | 45°F | 12% | 7% | 10 h |
| December 15 | 66°F | 45°F | 12% | 7% | 10 h |
| December 16 | 65°F | 45°F | 12% | 7% | 10 h |
| December 17 | 65°F | 45°F | 13% | 7% | 10 h |
| December 18 | 65°F | 45°F | 13% | 7% | 10 h |
| December 19 | 65°F | 45°F | 13% | 7% | 10 h |
| December 20 | 65°F | 44°F | 13% | 7% | 10 h |
| December 21 | 65°F | 44°F | 13% | 7% | 10 h |
| December 22 | 65°F | 44°F | 13% | 7% | 10 h |
| December 23 | 65°F | 44°F | 13% | 7% | 10 h |
| December 24 | 65°F | 44°F | 13% | 7% | 10 h |
| December 25 | 65°F | 44°F | 13% | 7% | 10 h |
| December 26 | 65°F | 44°F | 13% | 7% | 10 h |
| December 27 | 65°F | 44°F | 13% | 7% | 10 h |
| December 28 | 65°F | 45°F | 13% | 7% | 10 h |
| December 29 | 65°F | 45°F | 13% | 7% | 10 h |
| December 30 | 66°F | 45°F | 13% | 7% | 10 h |
| December 31 | 66°F | 45°F | 13% | 7% | 10 h |
- Normal high
- 66°FDecember average
- Normal low
- 45°FDecember average
- Precipitation
- 0.74 inmonth total
- Days with precipitation
- 40.01 inch or more
- Daylight
- 10 h 10 min to 10 hDecember 1 to December 31
- Days at 70°F or more
- 11
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023183; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Phoenix in December?
On a given December day the chance of 0.01 inch or more is 12% on average, highest around December 22 (13%). In all, 0.74 in falls on 4 days of a normal December.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023183.
How humid and windy is Phoenix in December?
At 3 p.m. the normal temperature is 64°F with 26% relative humidity and a dew point of 29°F; at 6 a.m. it is 46°F with 59% humidity. The wind averages 4.6 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 46°F | 33°F | 59% | 4.4 mph | 59% |
| 9 a.m. | 49°F | 32°F | 52% | 5.0 mph | 48% |
| noon | 59°F | 30°F | 33% | 5.9 mph | 46% |
| 3 p.m. | 64°F | 29°F | 26% | 5.3 mph | 44% |
| 6 p.m. | 61°F | 30°F | 31% | 4.6 mph | 40% |
| 9 p.m. | 55°F | 33°F | 43% | 3.2 mph | 54% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023183. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Phoenix?
The warmest December temperature on Phoenix's official record (since 1895) is 87°F, on December 10, 1950; the coldest is 22°F, on December 31, 1900. The wettest December brought 3.98 in (1967).
The December mean against the 1991-2020 normal of 55.8°F: 2021 59.2°F (+3.4), 2022 55.5°F (−0.3), 2023 60.5°F (+4.7), 2024 62.3°F (+6.5), 2025 63.2°F (+7.4). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.2°F | +3.4°F | 1.53 in |
| 2022 | 55.5°F | −0.3°F | 2.01 in |
| 2023 | 60.5°F | +4.7°F | 0.89 in |
| 2024 | 62.3°F | +6.5°F | 0.00 in |
| 2025 | 63.2°F | +7.4°F | 0.03 in |
Source: records: ACIS, NWS threaded record PHXthr; recent months: ACIS, station USW00023183. Records and recent months use complete months only.
How does December in Phoenix compare across Arizona?
Across the 97 places PlainClimate covers in Arizona, December normal highs run from 41°F in Lukachukai to 70°F in Gila Bend; Phoenix's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.