San Jose weather in December: San Jose, California: normal highs, lows, rain and records for December
San Jose in December has a normal high of 60°F and a normal low of 42°F, a daily mean of 51°F, falling from 61°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 2.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 15°C and low of 5°C, 58 mm of precipitation in December.
- NOAA stationSan Jose
- Station IDUSW00023293
- Location37.36°N 121.92°W
- Elevation51 ft (16 m)
- From the center7 miles
- Population997,368
- Jan 60° 42°
- Feb 62° 44°
- Mar 66° 46°
- Apr 69° 48°
- May 74° 52°
- Jun 79° 56°
- Jul 81° 58°
- Aug 81° 59°
- Sep 81° 57°
- Oct 76° 53°
- Nov 66° 46°
- Dec 60° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is San Jose in December?
The normal high is 60°F and the normal low 42°F, for a daily mean of 50.6°F. December is 5.3°F cooler than November and 0.2°F cooler than January. December is the 12th warmest month of the year in San Jose and the 3rd wettest. Across the month the normal high falls 2°F, from 61°F on December 1 to 59°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 49°F and 53°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 61°F | 43°F | 28% | 15% |
| December 8 | 60°F | 42°F | 29% | 16% |
| December 15 | 59°F | 42°F | 30% | 17% |
| December 22 | 59°F | 41°F | 30% | 17% |
| December 31 | 59°F | 41°F | 30% | 16% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 22)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 61°F | 43°F | 28% | 15% | 9 h 50 min |
| December 2 | 61°F | 43°F | 28% | 15% | 9 h 50 min |
| December 3 | 61°F | 43°F | 28% | 15% | 9 h 50 min |
| December 4 | 61°F | 42°F | 29% | 15% | 9 h 40 min |
| December 5 | 60°F | 42°F | 29% | 16% | 9 h 40 min |
| December 6 | 60°F | 42°F | 29% | 16% | 9 h 40 min |
| December 7 | 60°F | 42°F | 29% | 16% | 9 h 40 min |
| December 8 | 60°F | 42°F | 29% | 16% | 9 h 40 min |
| December 9 | 60°F | 42°F | 29% | 16% | 9 h 40 min |
| December 10 | 60°F | 42°F | 30% | 17% | 9 h 40 min |
| December 11 | 60°F | 42°F | 30% | 17% | 9 h 40 min |
| December 12 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 13 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 14 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 15 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 16 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 17 | 59°F | 42°F | 30% | 17% | 9 h 40 min |
| December 18 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 19 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 20 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 21 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 22 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 23 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 24 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 25 | 59°F | 41°F | 30% | 17% | 9 h 40 min |
| December 26 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
| December 27 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
| December 28 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
| December 29 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
| December 30 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
| December 31 | 59°F | 41°F | 30% | 16% | 9 h 40 min |
- Normal high
- 60°FDecember average
- Normal low
- 42°FDecember average
- Precipitation
- 2.29 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 9 h 50 min to 9 h 40 minDecember 1 to December 31
- Days at 70°F or more
- 1
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023293; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in San Jose in December?
On a given December day the chance of 0.01 inch or more is 30% on average, highest around December 15 (30%). In all, 2.29 in falls on 10 days of a normal December.
In a normal December in San Jose, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023293.
What are the records for December in San Jose?
The warmest December temperature on San Jose's official record (since 1893) is 79°F, on December 12, 1958; the coldest is 19°F, on December 23, 1990. The wettest December brought 9.26 in (1955); the snowiest, 1.0 inches (1932).
The December mean against the 1991-2020 normal of 50.6°F: 2021 50.1°F (−0.5), 2022 50.0°F (−0.6), 2023 55.6°F (+5.0), 2024 56.1°F (+5.5), 2025 52.7°F (+2.1). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.1°F | −0.5°F | 4.35 in |
| 2022 | 50.0°F | −0.6°F | 4.70 in |
| 2023 | 55.6°F | +5.0°F | 2.76 in |
| 2024 | 56.1°F | +5.5°F | 2.33 in |
| 2025 | 52.7°F | +2.1°F | 1.28 in |
Source: records: ACIS, NWS threaded record SJCthr; recent months: ACIS, station USW00023293. Records and recent months use complete months only.
How does December in San Jose 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; San Jose's is 60°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.