North Tustin weather in December

In December, North Tustin sees average daytime highs of 64°F and overnight lows near 47°F, with 2.2 in of rain across 5 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 64°F through the month. The sky is clear or mostly clear about 54% 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 North Tustin's 9th-clearest and 7th-windiest month. For the whole year in context, see North Tustin's year-round climate.

Daytime high
64°
12th warmest
Overnight low
47°
2nd coldest
Rainfall
2.2 in
5 wet days
Daylight
9 h 48 min
6:54 AM – 4:40 PM
Cloud cover
41%
9th clearest
Wind
4 mph
7th windiest
Solar energy
2.97 kWh/m²
Travel score
6.7
out of 10

North Tustin is census-designated place in Orange County, California, United States.

Density
1,442/km²
people per km²

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 64°F through the month.

A typical December day in North Tustin reaches about 64°F in the afternoon and slips back to 47°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 72°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)
16649
26648
36548
46548
56548
66548
76548
86447
96447
106447
116447
126447
136447
146447
156447
166446
176346
186346
196346
206346
216346
226346
236346
246346
256346
266346
276346
286346
296346
306346
316346

North Tustin weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 47°3.15.7106.7
Feb64° / 48°3.66.410.76.5
Mar66° / 51°2.2611.76.9
Apr69° / 53°0.93.112.87.8
May71° / 57°0.41.713.78.4
Jun76° / 60°0.10.314.29.2
Jul81° / 64°0.10.5148.8
Aug83° / 65°0.00.213.38.3
Sep81° / 64°0.20.812.28.6
Oct76° / 59°0.72.211.28.8
Nov70° / 52°0.92.610.28.1
Dec64° / 47°2.259.86.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16931
26931
36832
46733
56733
66634
76634
86535
96535
106535
116436
126436
136535
146535
156535
166535
176535
186535
196535
206535
216436
226436
236436
246436
256337
266337
276337
286337
296238
306238
316238

Chance of precipitation in December

Any precipitation

North Tustin gets around 2.2 in of rain over 5 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 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
113
213
314
414
514
614
714
815
915
1015
1116
1216
1316
1416
1516
1617
1717
1817
1917
2017
2117
2217
2318
2418
2518
2618
2718
2818
2919
3019
3119

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2964
3964
4964
5964
6964
7964
8964
9964
10964
11964
12973
13973
14973
15973
16982
17982
18982
19982
20982
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31982

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 6:43 AM to 7:01 AM, and sunset from 4:38 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.96:434:38
29.96:444:38
39.96:454:38
49.96:464:38
59.96:474:38
69.96:474:38
79.86:484:38
89.86:494:39
99.86:504:39
109.86:504:39
119.86:514:39
129.86:524:39
139.86:524:39
149.86:534:40
159.86:544:40
169.86:544:40
179.86:554:41
189.86:554:41
199.86:564:41
209.86:574:42
219.86:574:42
229.86:584:43
239.86:584:43
249.86:584:44
259.86:594:44
269.86:594:45
279.87:004:45
289.87:004:46
299.87:004:47
309.87:014:47
319.87:014:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.97 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.97 kWh/m² to a high of 7.88 kWh/m² in June across the year — December's 2.97 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.0Moderate
73.0Moderate
82.9Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.0Moderate
303.0Moderate
313.0Moderate
Planning a trip in December

Is December a good time to visit North Tustin?

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

6.7
Sightseeing
10th-best month of the year
2.1
Beach & pool
11th-best month of the year

December is a reasonable time to visit North Tustin for sightseeing.

What to pack for North Tustin in December

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

In December, North Tustin sees daytime highs around 64°F and nights near 47°F. Little to plan around — just the basics. About 5 days see rain.

Sea temperature near North Tustin in December

The nearest coast averages about 60°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 11 mi away) is warmest in August at about 69°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar59Cool
Apr60Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug69Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec60Cool

UV index in North Tustin 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 North Tustin peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJun 23UV 10Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in North Tustin 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 North Tustin is worst in September — around 49 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (May, 12 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateSep 1447 µg/m³May 1713 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar19Moderate
Apr17Moderate
May12Moderate
Jun17Moderate
Jul19Moderate
Aug32Moderate
Sep49Poor
Oct21Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is North Tustin?

North Tustin sits at 33.8°N, 117.8°W, 256 ft above sea level, in United States. The nearest listed city is Tustin, 2.5 mi away.

Topography around North Tustin

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

Within 2 miles, the terrain around North Tustin has only modest variations in elevation — a maximum elevation change of 804 ft around an average of 322 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,740 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,013 ft.

The land around North Tustin is covered by artificial surfaces (68%) and trees (24%) within 2 miles, artificial surfaces (57%) within 10 miles, and water (30%) and artificial surfaces (25%) within 50 miles.

2 miles
804 ft
10 miles
3,740 ft
50 miles
10,013 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Tustin 2.5 mi · Orange 3.7 mi · Northwood 3.7 mi · Santa Ana 4.3 mi · El Camino Real 5.0 mi · Tustin Legacy 5.0 mi · Stonegate 5.0 mi · Westpark 5.6 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 North Tustin (33.7645°, -117.7939°, elevation 256 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).