Irvine weather in December: Irvine, California: normal highs, lows, rain and records for December
Irvine in December has a normal high of 68°F and a normal low of 48°F, a daily mean of 58°F, falling from 70°F on the 1st to 68°F by the 31st. Measurable precipitation falls on 4 days in a normal December, 2.34 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 9°C, 59 mm of precipitation in December.
- NOAA stationIrvine Ranch
- Station IDUSC00044303
- Location33.72°N 117.72°W
- Elevation540 ft (165 m)
- From the center4 miles
- Population318,683
- Jan 69° 49°
- Feb 71° 48°
- Mar 73° 50°
- Apr 76° 52°
- May 79° 56°
- Jun 83° 59°
- Jul 88° 62°
- Aug 90° 62°
- Sep 89° 62°
- Oct 84° 58°
- Nov 76° 53°
- Dec 68° 48°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Irvine in December?
The normal high is 68°F and the normal low 48°F, for a daily mean of 57.7°F. December is 6.3°F cooler than November and 1.1°F cooler than January. December is the 12th warmest month of the year in Irvine and the 3rd wettest. Across the month the normal high falls 2°F, from 70°F on December 1 to 68°F on December 31. From one year to the next December's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 56°F and 60°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 15%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 70°F | 49°F | 11% | 10% |
| December 8 | 68°F | 48°F | 12% | 11% |
| December 15 | 67°F | 47°F | 14% | 12% |
| December 22 | 67°F | 47°F | 15% | 13% |
| December 31 | 68°F | 48°F | 15% | 12% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 16)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 70°F | 49°F | 11% | 10% | 10 h 10 min |
| December 2 | 69°F | 49°F | 11% | 10% | 10 h |
| December 3 | 69°F | 49°F | 11% | 10% | 10 h |
| December 4 | 69°F | 48°F | 11% | 10% | 10 h |
| December 5 | 69°F | 48°F | 11% | 10% | 10 h |
| December 6 | 68°F | 48°F | 12% | 11% | 10 h |
| December 7 | 68°F | 48°F | 12% | 11% | 10 h |
| December 8 | 68°F | 48°F | 12% | 11% | 10 h |
| December 9 | 68°F | 48°F | 12% | 11% | 10 h |
| December 10 | 68°F | 48°F | 13% | 11% | 10 h |
| December 11 | 68°F | 48°F | 13% | 12% | 10 h |
| December 12 | 67°F | 47°F | 13% | 12% | 10 h |
| December 13 | 67°F | 47°F | 13% | 12% | 10 h |
| December 14 | 67°F | 47°F | 14% | 12% | 10 h |
| December 15 | 67°F | 47°F | 14% | 12% | 10 h |
| December 16 | 67°F | 47°F | 14% | 12% | 10 h |
| December 17 | 67°F | 47°F | 14% | 12% | 10 h |
| December 18 | 67°F | 47°F | 14% | 12% | 10 h |
| December 19 | 67°F | 47°F | 14% | 12% | 9 h 50 min |
| December 20 | 67°F | 47°F | 15% | 12% | 9 h 50 min |
| December 21 | 67°F | 47°F | 15% | 13% | 9 h 50 min |
| December 22 | 67°F | 47°F | 15% | 13% | 9 h 50 min |
| December 23 | 67°F | 47°F | 15% | 13% | 9 h 50 min |
| December 24 | 68°F | 47°F | 15% | 12% | 9 h 50 min |
| December 25 | 68°F | 47°F | 15% | 12% | 9 h 50 min |
| December 26 | 68°F | 47°F | 15% | 12% | 9 h 50 min |
| December 27 | 68°F | 47°F | 15% | 12% | 10 h |
| December 28 | 68°F | 48°F | 15% | 12% | 10 h |
| December 29 | 68°F | 48°F | 15% | 12% | 10 h |
| December 30 | 68°F | 48°F | 15% | 12% | 10 h |
| December 31 | 68°F | 48°F | 15% | 12% | 10 h |
- Normal high
- 68°FDecember average
- Normal low
- 48°FDecember average
- Precipitation
- 2.34 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
- 13
- Days at 80°F or more
- 2
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00044303; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Irvine in December?
On a given December day the chance of 0.01 inch or more is 13% on average, highest around December 22 (15%). In all, 2.34 in falls on 4 days of a normal December, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00044303.
What are the records for December in Irvine?
The December mean against the 1991-2020 normal of 57.7°F: 2021 56.6°F (−1.1), 2022 56.7°F (−1.0), 2023 61.9°F (+4.2), 2024 59.3°F (+1.6), 2025 62.1°F (+4.4). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.6°F | −1.1°F | 5.55 in |
| 2022 | 56.7°F | −1.0°F | 2.16 in |
| 2023 | 61.9°F | +4.2°F | 1.36 in |
| 2024 | 59.3°F | +1.6°F | 0.00 in |
| 2025 | 62.1°F | +4.4°F | 2.68 in |
Source: recent months: ACIS, station USC00044303. Records and recent months use complete months only.
How does December in Irvine compare across California?
Across the 219 places PlainClimate covers in California, December normal highs run from 38°F in Tahoma to 71°F in Anaheim; Irvine's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.