St. George weather in December: St. George, Utah: normal highs, lows, rain and records for December
St. George in December has a normal high of 53°F and a normal low of 28°F, a daily mean of 40°F, falling from 57°F on the 1st to 52°F by the 31st. Measurable precipitation falls on 5 days in a normal December, 0.86 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of −2°C, 22 mm of precipitation in December.
- NOAA stationSt George
- Station IDUSC00427516
- Location37.12°N 113.61°W
- Elevation2,857 ft (871 m)
- Population106,288
- Jan 54° 28°
- Feb 59° 32°
- Mar 68° 39°
- Apr 75° 46°
- May 85° 56°
- Jun 96° 65°
- Jul 102° 72°
- Aug 100° 70°
- Sep 92° 61°
- Oct 79° 47°
- Nov 64° 35°
- Dec 53° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. George in December?
The normal high is 53°F and the normal low 28°F, for a daily mean of 40.4°F. December is 8.8°F cooler than November and 0.8°F cooler than January. December is the 12th warmest month of the year in St. George and the 5th wettest. Across the month the normal high falls 5°F, from 57°F on December 1 to 52°F on December 31. From one year to the next December's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 38°F and 42°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 17%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 57°F | 30°F | 12% | 6% |
| December 8 | 54°F | 28°F | 13% | 7% |
| December 15 | 53°F | 28°F | 15% | 8% |
| December 22 | 52°F | 27°F | 16% | 9% |
| December 31 | 52°F | 27°F | 17% | 9% |
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 | 57°F | 30°F | 12% | 6% | 9 h 50 min |
| December 2 | 56°F | 30°F | 12% | 6% | 9 h 50 min |
| December 3 | 56°F | 29°F | 12% | 7% | 9 h 50 min |
| December 4 | 55°F | 29°F | 13% | 7% | 9 h 50 min |
| December 5 | 55°F | 29°F | 13% | 7% | 9 h 40 min |
| December 6 | 55°F | 29°F | 13% | 7% | 9 h 40 min |
| December 7 | 54°F | 29°F | 13% | 7% | 9 h 40 min |
| December 8 | 54°F | 28°F | 13% | 7% | 9 h 40 min |
| December 9 | 54°F | 28°F | 14% | 7% | 9 h 40 min |
| December 10 | 54°F | 28°F | 14% | 7% | 9 h 40 min |
| December 11 | 53°F | 28°F | 14% | 7% | 9 h 40 min |
| December 12 | 53°F | 28°F | 14% | 7% | 9 h 40 min |
| December 13 | 53°F | 28°F | 14% | 8% | 9 h 40 min |
| December 14 | 53°F | 28°F | 15% | 8% | 9 h 40 min |
| December 15 | 53°F | 28°F | 15% | 8% | 9 h 40 min |
| December 16 | 52°F | 28°F | 15% | 8% | 9 h 40 min |
| December 17 | 52°F | 28°F | 15% | 8% | 9 h 40 min |
| December 18 | 52°F | 27°F | 15% | 8% | 9 h 40 min |
| December 19 | 52°F | 27°F | 15% | 8% | 9 h 40 min |
| December 20 | 52°F | 27°F | 16% | 8% | 9 h 40 min |
| December 21 | 52°F | 27°F | 16% | 9% | 9 h 40 min |
| December 22 | 52°F | 27°F | 16% | 9% | 9 h 40 min |
| December 23 | 52°F | 27°F | 16% | 9% | 9 h 40 min |
| December 24 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 25 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 26 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 27 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 28 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 29 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 30 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
| December 31 | 52°F | 27°F | 17% | 9% | 9 h 40 min |
- Normal high
- 53°FDecember average
- Normal low
- 28°FDecember average
- Precipitation
- 0.86 inmonth total
- Days with precipitation
- 50.01 inch or more
- Nights at 32°F or colder
- 22
- Daylight
- 9 h 50 min to 9 h 40 minDecember 1 to December 31
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00427516; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. George in December?
On a given December day the chance of 0.01 inch or more is 15% on average, highest around December 31 (17%). In all, 0.86 in falls on 5 days of a normal December.
In a normal December in St. George, 22 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00427516.
What are the records for December in St. George?
The warmest December temperature on this station's record (since 1893) is 75°F, on December 3, 1941; the coldest is −4°F, on December 27, 1909. The wettest December brought 3.44 in (2010); the snowiest, 9.5 inches (1967).
The December mean against the 1991-2020 normal of 40.4°F: 2021 43.8°F (+3.4), 2022 42.6°F (+2.2), 2023 45.5°F (+5.1), 2024 45.3°F (+4.9), 2025 47.2°F (+6.8). 5 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.8°F | +3.4°F | 1.60 in |
| 2022 | 42.6°F | +2.2°F | 1.43 in |
| 2023 | 45.5°F | +5.1°F | 0.16 in |
| 2024 | 45.3°F | +4.9°F | 0.00 in |
| 2025 | 47.2°F | +6.8°F | 0.54 in |
Source: records: ACIS, station USC00427516; recent months: ACIS, station USC00427516. Records and recent months use complete months only.
How does December in St. George compare across Utah?
Across the 97 places PlainClimate covers in Utah, December normal highs run from 28°F in Brian Head to 53°F in St. George; St. George's is 53°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.