La Jolla weather in January

In January, La Jolla sees average daytime highs of 62°F and overnight lows near 52°F, with 2.0 in of rain across 5.5 wet days and about 10.1 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 62°F through the month. The sky is clear or mostly clear about 50% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of January to 10 h 24 min by month's end. Set against the rest of the year, January is La Jolla's 10th-clearest and 9th-windiest month. For the whole year in context, see La Jolla's year-round climate.

Daytime high
62°
11th warmest
Overnight low
52°
1st coldest
Rainfall
2.0 in
5.5 wet days
Daylight
10 h 06 min
6:57 AM – 5:00 PM
Cloud cover
44%
10th clearest
Wind
6 mph
9th windiest
Solar energy
3.32 kWh/m²
Travel score
6.1
out of 10

La Jolla is neighborhood in San Diego, California, United States.

Founded
1850

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 62°F through the month.

A typical January day in La Jolla reaches about 62°F in the afternoon and slips back to 52°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 57°F and 68°F. Set against its neighbours, January runs on par with December and on par with February.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16252
26252
36252
46252
56252
66252
76252
86252
96252
106252
116252
126252
136252
146252
156252
166252
176252
186252
196252
206252
216252
226252
236252
246252
256252
266252
276252
286252
296252
306252
316252

La Jolla weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 52°2.05.510.16.1
Feb62° / 53°2.56.210.85.9
Mar63° / 54°1.55.211.86.3
Apr64° / 56°0.62.912.87.2
May66° / 58°0.31.613.77.7
Jun69° / 61°0.00.214.18.4
Jul72° / 64°0.10.313.99.0
Aug74° / 66°0.00.113.29.4
Sep74° / 65°0.10.612.29.2
Oct71° / 62°0.5211.28.4
Nov67° / 57°0.72.910.37.6
Dec62° / 53°1.64.99.96.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
36139
46139
56139
66139
76139
86139
96238
106337
116337
126337
136337
146337
156337
166337
176337
186337
196337
206436
216436
226436
236436
246436
256436
266436
276535
286535
296535
306535
316634

Chance of precipitation in January

Any precipitation

La Jolla gets around 2.0 in of rain over 5.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
218
319
419
519
619
719
818
918
1018
1118
1218
1317
1417
1517
1617
1717
1817
1917
2017
2117
2217
2317
2417
2517
2617
2717
2817
2917
3017
3117

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 95% 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
5955
6955
7955
8946
9946
10946
11946
12937
13937
14937
15937
16937
17937
18937
19937
20946
21946
22946
23946
24955
25955
26955
27964
28964
29964
30964
31964

Wind in January

Winds average 6 mph in January.

Across January, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 54 min at the start of January to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 6:56 AM to 6:51 AM, and sunset from 4:48 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.96:564:48
29.96:564:49
39.96:574:50
49.96:574:50
59.96:574:51
69.96:574:52
79.96:574:53
89.96:574:53
910.06:574:54
1010.06:574:55
1110.06:574:56
1210.06:574:57
1310.06:574:57
1410.06:574:58
1510.06:574:59
1610.16:575:00
1710.16:575:01
1810.16:565:02
1910.16:565:03
2010.16:565:04
2110.16:565:04
2210.26:555:05
2310.26:555:06
2410.26:545:07
2510.26:545:08
2610.36:545:09
2710.36:535:10
2810.36:535:11
2910.36:525:12
3010.46:525:13
3110.46:515:14

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.32 kWh/m².

For context, solar energy here swings from a low near 3.12 kWh/m² to a high of 7.89 kWh/m² in June across the year — January's 3.32 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.2Moderate
63.2Moderate
73.2Moderate
83.2Moderate
93.2Moderate
103.2Moderate
113.2Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.3Moderate
163.3Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.7Moderate
293.7Moderate
303.7Moderate
313.8Moderate
Planning a trip in January

Is January a good time to visit La Jolla?

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

6.1
Sightseeing
11th-best month of the year
1.3
Beach & pool
11th-best month of the year

January is a reasonable time to visit La Jolla for sightseeing.

What to pack for La Jolla in January

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

In January, La Jolla sees daytime highs around 62°F and nights near 52°F. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near La Jolla in January

The nearest coast averages about 60°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 70°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 8 to Oct 6 — about 3 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb59Cool
Mar60Cool
Apr61Cool
May64Cool
Jun66Cool
Jul69Refreshing
Aug70Refreshing
Sep70Refreshing
Oct67Cool
Nov64Cool
Dec61Cool

UV index in La Jolla in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in La Jolla peaks around June 23 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 highHighModerateJun 23UV 11Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in La Jolla in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in La Jolla is worst in September — around 26 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (May, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1625 µg/m³May 168 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar12Moderate
Apr11Good
May8Good
Jun11Good
Jul11Good
Aug15Moderate
Sep26Moderate
Oct14Moderate
Nov12Moderate
Dec16Moderate
Location & terrain

Where is La Jolla?

La Jolla sits at 32.8°N, 117.3°W, 105 ft above sea level, in United States. The nearest listed city is Mira Mesa, 8.7 mi away.

Topography around La Jolla

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

Within 2 miles, the terrain around La Jolla has only modest variations in elevation — a maximum elevation change of 810 ft around an average of 128 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 814 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,450 ft.

The land around La Jolla is covered by water (58%) and artificial surfaces (25%) within 2 miles, water (57%) and artificial surfaces (25%) within 10 miles, and water (37%) and shrubs (20%) within 50 miles.

2 miles
810 ft
10 miles
814 ft
50 miles
6,450 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
January weather nearby: Mira Mesa 8.7 mi · San Diego 11 mi · Rancho Penasquitos 12 mi · Coronado 12 mi · Encinitas 13 mi · National City 16 mi · La Mesa 16 mi · Lemon Grove 16 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 La Jolla (32.8473°, -117.2742°, elevation 105 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).