Merced weather in December: Merced, California: normal highs, lows, rain and records for December
Merced in December has a normal high of 56°F and a normal low of 36°F, a daily mean of 46°F, falling from 59°F on the 1st to 54°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 1.91 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 2°C, 49 mm of precipitation in December.
- NOAA stationMerced Municipal Airport
- Station IDUSW00023257
- Location37.28°N 120.51°W
- Elevation152 ft (46 m)
- Population96,073
- Jan 56° 37°
- Feb 62° 39°
- Mar 68° 42°
- Apr 74° 45°
- May 83° 52°
- Jun 91° 58°
- Jul 96° 62°
- Aug 95° 61°
- Sep 91° 57°
- Oct 80° 49°
- Nov 66° 41°
- Dec 56° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Merced in December?
The normal high is 56°F and the normal low 36°F, for a daily mean of 46.0°F. December is 7.5°F cooler than November and 0.3°F cooler than January. December is the 12th warmest month of the year in Merced and the 3rd wettest. Across the month the normal high falls 5°F, from 59°F on December 1 to 54°F on December 31. From one year to the next December's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 44°F and 48°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 59°F | 37°F | 28% | 12% |
| December 8 | 57°F | 36°F | 30% | 14% |
| December 15 | 56°F | 36°F | 31% | 15% |
| December 22 | 55°F | 36°F | 32% | 15% |
| December 31 | 54°F | 36°F | 32% | 15% |
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 | 59°F | 37°F | 28% | 12% | 9 h 50 min |
| December 2 | 59°F | 37°F | 28% | 13% | 9 h 50 min |
| December 3 | 59°F | 37°F | 29% | 13% | 9 h 50 min |
| December 4 | 58°F | 37°F | 29% | 13% | 9 h 50 min |
| December 5 | 58°F | 37°F | 29% | 13% | 9 h 40 min |
| December 6 | 58°F | 36°F | 29% | 13% | 9 h 40 min |
| December 7 | 58°F | 36°F | 29% | 14% | 9 h 40 min |
| December 8 | 57°F | 36°F | 30% | 14% | 9 h 40 min |
| December 9 | 57°F | 36°F | 30% | 14% | 9 h 40 min |
| December 10 | 57°F | 36°F | 30% | 14% | 9 h 40 min |
| December 11 | 57°F | 36°F | 30% | 14% | 9 h 40 min |
| December 12 | 56°F | 36°F | 31% | 14% | 9 h 40 min |
| December 13 | 56°F | 36°F | 31% | 15% | 9 h 40 min |
| December 14 | 56°F | 36°F | 31% | 15% | 9 h 40 min |
| December 15 | 56°F | 36°F | 31% | 15% | 9 h 40 min |
| December 16 | 56°F | 36°F | 31% | 15% | 9 h 40 min |
| December 17 | 55°F | 36°F | 31% | 15% | 9 h 40 min |
| December 18 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 19 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 20 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 21 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 22 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 23 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 24 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 25 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 26 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 27 | 55°F | 36°F | 32% | 15% | 9 h 40 min |
| December 28 | 54°F | 36°F | 32% | 15% | 9 h 40 min |
| December 29 | 54°F | 36°F | 32% | 15% | 9 h 40 min |
| December 30 | 54°F | 36°F | 32% | 15% | 9 h 40 min |
| December 31 | 54°F | 36°F | 32% | 15% | 9 h 40 min |
- Normal high
- 56°FDecember average
- Normal low
- 36°FDecember average
- Precipitation
- 1.91 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 11
- Daylight
- 9 h 50 min to 9 h 40 minDecember 1 to December 31
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023257; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Merced in December?
On a given December day the chance of 0.01 inch or more is 31% on average, highest around December 23 (32%). In all, 1.91 in falls on 10 days of a normal December.
In a normal December in Merced, 11 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023257.
What are the records for December in Merced?
The warmest December temperature on Merced's official record (since 1899) is 76°F, on December 7, 1912; the coldest is 15°F, on December 24, 1990. The wettest December brought 5.57 in (1921); the snowiest, 1.0 inches (1932).
The December mean against the 1991-2020 normal of 46.0°F: 2021 46.6°F (+0.6), 2022 45.9°F (−0.1), 2023 51.8°F (+5.8), 2024 50.9°F (+4.9), 2025 46.7°F (+0.7). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.6°F | +0.6°F | 3.80 in |
| 2022 | 45.9°F | −0.1°F | 5.22 in |
| 2023 | 51.8°F | +5.8°F | 2.00 in |
| 2024 | 50.9°F | +4.9°F | 1.40 in |
| 2025 | 46.7°F | +0.7°F | 0.97 in |
Source: records: ACIS, NWS threaded record MCEthr; recent months: ACIS, station USW00023257. Records and recent months use complete months only.
How does December in Merced 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; Merced's is 56°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.