Westpark weather in January

In January, Westpark sees average daytime highs of 64°F and overnight lows near 47°F, with 3.1 in of rain across 5.7 wet days and about 10 hours of daylight. It is the 11th-warmest and 2nd-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 49% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Westpark's 11th-clearest and 7th-windiest month. For the whole year in context, see Westpark's year-round climate.

Daytime high
64°
11th warmest
Overnight low
47°
2nd coldest
Rainfall
3.1 in
5.7 wet days
Daylight
10 hours
7:01 AM – 5:00 PM
Cloud cover
45%
11th clearest
Wind
4 mph
7th windiest
Solar energy
3.12 kWh/m²
Travel score
6.7
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 64°F through the month.

A typical January day in Westpark 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 74°F. Set against its neighbours, January runs on par with December and on par with February.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16346
26346
36346
46346
56446
66446
76446
86446
96446
106446
116447
126447
136447
146447
156447
166447
176447
186447
196447
206447
216447
226447
236447
246447
256447
266447
276447
286447
296447
306447
316547

Westpark 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
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°0.92.610.38.1
Dec64° / 47°2.259.86.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46139
56139
66139
76139
86139
96139
106139
116139
126139
136139
146139
156139
166139
176139
186139
196139
206139
216139
226139
236139
246139
256139
266139
276139
286139
296238
306238
316238

Chance of precipitation in January

Any precipitation

Westpark gets around 3.1 in of rain over 5.7 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 20% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
119
220
320
420
520
620
720
820
919
1019
1119
1219
1318
1418
1518
1618
1718
1818
1918
2018
2118
2218
2318
2418
2518
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 98% 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
10973
11973
12973
13973
14973
15973
16973
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27991
28991
29991
30991
31991

Wind in January

Winds average 4 mph in January.

Across January, 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 January

DaylightNight

Daylight runs from about 9 h 48 min at the start of January to 10 h 18 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 7:00 AM to 6:55 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)
19.87:004:48
29.87:014:49
39.87:014:50
49.87:014:50
59.87:014:51
69.87:014:52
79.97:014:53
89.97:014:54
99.97:014:54
109.97:014:55
119.97:014:56
129.97:014:57
139.97:014:58
1410.07:014:59
1510.07:014:59
1610.07:015:00
1710.07:015:01
1810.07:005:02
1910.07:005:03
2010.17:005:04
2110.17:005:05
2210.16:595:06
2310.16:595:07
2410.26:585:08
2510.26:585:09
2610.26:585:09
2710.26:575:10
2810.26:575:11
2910.36:565:12
3010.36:555:13
3110.36:555:14

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.12 kWh/m².

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 — January's 3.12 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.0Moderate
73.0Moderate
83.0Moderate
93.0Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.1Moderate
143.1Moderate
153.1Moderate
163.1Moderate
173.2Moderate
183.2Moderate
193.2Moderate
203.2Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in January

Is January a good time to visit Westpark?

Our two travel scores rate January 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
12th-best month of the year

January is a reasonable time to visit Westpark for sightseeing.

What to pack for Westpark in January

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

In January, Westpark sees daytime highs around 64°F and nights near 47°F. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Westpark in January

The nearest coast averages about 59°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 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 Westpark in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Westpark peaks around June 23 at about 10 (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 10Dec 17UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5Moderate
Apr7Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Westpark 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 Westpark 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 Westpark?

Westpark sits at 33.7°N, 117.8°W, 92 ft above sea level, in United States. The nearest listed city is Irvine, 1.2 mi away.

Topography around Westpark

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

Within 2 miles, the terrain around Westpark has only modest variations in elevation — a maximum elevation change of 154 ft around an average of 75 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,745 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,013 ft.

The land around Westpark is covered by artificial surfaces (72%) within 2 miles, artificial surfaces (55%) within 10 miles, and water (34%) and artificial surfaces (25%) within 50 miles.

2 miles
154 ft
10 miles
1,745 ft
50 miles
10,013 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Irvine 1.2 mi · Tustin Legacy 1.2 mi · Woodbridge 1.2 mi · El Camino Real 2.5 mi · UC Irvine 3.7 mi · Northwood 3.7 mi · Tustin 4.3 mi · Stonegate 4.3 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 Westpark (33.6853°, -117.8137°, elevation 92 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).