Temecula weather in December

In December, Temecula sees average daytime highs of 63°F and overnight lows near 45°F, with 2.0 in of rain across 4.9 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 63°F through the month. The sky is clear or mostly clear about 52% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Temecula's 9th-clearest and 6th-windiest month. For the whole year in context, see Temecula's year-round climate.

Daytime high
63°
12th warmest
Overnight low
45°
2nd coldest
Rainfall
2.0 in
4.9 wet days
Daylight
9 h 48 min
6:51 AM – 4:38 PM
Cloud cover
42%
9th clearest
Wind
4 mph
6th windiest
Solar energy
3.06 kWh/m²
Travel score
6.6
out of 10

Temecula is city in Riverside County, California, United States.

Density
1,408/km²
people per km²
Founded
1989

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 63°F through the month.

A typical December day in Temecula reaches about 63°F in the afternoon and slips back to 45°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 73°F. Set against its neighbours, December runs about 6°F cooler than November and on par with January.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16647
26547
36546
46546
56546
66446
76446
86446
96446
106446
116445
126345
136345
146345
156345
166345
176344
186344
196344
206344
216244
226244
236244
246244
256244
266244
276244
286244
296244
306244
316344

Temecula weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 45°2.75.8106.5
Feb64° / 46°3.4710.86.2
Mar66° / 49°2.0611.76.9
Apr69° / 52°1.03.512.87.8
May73° / 56°0.42.113.78.5
Jun79° / 60°0.10.614.28.9
Jul85° / 65°0.20.8147.2
Aug86° / 67°0.10.613.26.6
Sep84° / 64°0.2112.27.5
Oct77° / 58°0.72.711.28.6
Nov70° / 50°1.03.110.38.0
Dec63° / 45°2.04.99.86.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26634
36634
46634
56436
66535
76535
86436
96436
106436
116535
126535
136535
146535
156535
166535
176634
186535
196535
206535
216535
226436
236436
246337
256337
266238
276139
286139
296040
306040
316040

Chance of precipitation in December

Any precipitation

Temecula gets around 2.0 in of rain over 4.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 16% and peaks near 18% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
114
214
315
415
515
615
715
815
916
1016
1116
1216
1316
1416
1516
1616
1716
1816
1916
2016
2116
2216
2317
2417
2517
2617
2717
2817
2918
3018
3118

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10991
11991
12991
13991
14991
15991
16991
17991
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
29991
30991
31991

Wind in December

Winds average 4 mph in December.

Across December, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:40 AM to 6:58 AM, and sunset from 4:37 PM to 4:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.96:404:37
29.96:414:36
39.96:424:36
49.96:434:36
59.96:434:36
69.96:444:37
79.96:454:37
89.96:464:37
99.86:464:37
109.86:474:37
119.86:484:37
129.86:484:37
139.86:494:38
149.86:504:38
159.86:504:38
169.86:514:38
179.86:524:39
189.86:524:39
199.86:534:40
209.86:534:40
219.86:544:40
229.86:544:41
239.86:554:41
249.86:554:42
259.86:564:42
269.86:564:43
279.86:564:44
289.86:574:44
299.86:574:45
309.86:574:45
319.86:584:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.06 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.06 kWh/m² to a high of 8.04 kWh/m² in June across the year — December's 3.06 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.0Moderate
83.0Moderate
93.0Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.0Moderate
263.0Moderate
273.1Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in December

Is December a good time to visit Temecula?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.6
Sightseeing
9th-best month of the year
1.9
Beach & pool
10th-best month of the year

December is a reasonable time to visit Temecula for sightseeing.

What to pack for Temecula in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Temecula sees daytime highs around 63°F and nights near 45°F. Worth packing: a warm layer. About 5 days see rain.

a warm layer

Sea temperature near Temecula in December

The nearest coast averages about 61°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 mi away) is warmest in August at about 71°F and coldest in January near 59°F.

It's comfortable for a long swim from Jul 5 to Oct 7 — about 3.1 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar60Cool
Apr61Cool
May64Cool
Jun66Cool
Jul69Refreshing
Aug71Refreshing
Sep70Refreshing
Oct67Cool
Nov64Cool
Dec61Cool

UV index in Temecula in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Temecula peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 12UV 11Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Temecula in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Temecula is worst in September — around 40 µg/m³ PM2.5 (poor), about 5.4× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1437 µg/m³Dec 207 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar11Good
Apr10Good
May8Good
Jun19Moderate
Jul12Moderate
Aug20Moderate
Sep40Poor
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Temecula?

Temecula sits at 33.5°N, 117.1°W, 1,017 ft above sea level, in United States. The nearest listed city is Murrieta, 5.6 mi away.

Topography around Temecula

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Temecula.

Within 2 miles, the terrain around Temecula has significant variations in elevation — a maximum elevation change of 948 ft around an average of 1,191 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,029 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,417 ft.

The land around Temecula is covered by artificial surfaces (40%) and trees (34%) within 2 miles, trees (32%), shrubs (25%) and grassland (23%) within 10 miles, and shrubs (28%) within 50 miles.

2 miles
948 ft
10 miles
4,029 ft
50 miles
11,417 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Murrieta 5.6 mi · Fallbrook 9.9 mi · Wildomar 11 mi · Sun City 15 mi · Lake Elsinore 16 mi · Menifee 16 mi · Hemet 21 mi · Perris 21 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Temecula (33.4936°, -117.1484°, elevation 1,017 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).