Pasadena weather in January

In January, Pasadena sees average daytime highs of 62°F and overnight lows near 44°F, with 3.4 in of rain across 5.8 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 62°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 Pasadena's 11th-clearest and 2nd-windiest month. For the whole year in context, see Pasadena's year-round climate.

Daytime high: 62°; 11th warmest
Overnight low: 44°; 2nd coldest
Rainfall: 3.4 in; 5.8 wet days
Daylight: 10 hours; 7:03 AM – 5:01 PM
Cloud cover: 46%; 11th clearest
Wind: 5 mph; 2nd windiest
Solar energy: 3.11 kWh/m²
Travel score: 6.1; out of 10

Pasadena is city in Los Angeles County, California, United States.

Density: 2,375/km²; people per km²
Founded: 1886

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

← December Pasadena year-round climate February →Best places to visit in January

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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 Pasadena reaches about 62°F in the afternoon and slips back to 44°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 73°F. Set against its neighbours, January runs on par with December and on par with February.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	61	61	61	61	61	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	63	63	63	63	63	63
Avg low (°F)	43	43	43	43	43	43	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44

	Avg high (°F)	Avg low (°F)
1	61	43
2	61	43
3	61	43
4	61	43
5	61	43
6	62	43
7	62	43
8	62	43
9	62	43
10	62	44
11	62	44
12	62	44
13	62	44
14	62	44
15	62	44
16	62	44
17	62	44
18	62	44
19	62	44
20	62	44
21	62	44
22	62	44
23	62	44
24	62	44
25	62	44
26	63	44
27	63	44
28	63	44
29	63	44
30	63	44
31	63	44

Pasadena 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.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	62° / 44°	3.4	5.8	10	6.1
Feb	63° / 44°	3.7	6.7	10.7	6.1
Mar	66° / 46°	2.5	6.1	11.7	6.9
Apr	71° / 49°	1.0	3.6	12.8	7.9
May	75° / 54°	0.5	2.3	13.8	8.8
Jun	81° / 59°	0.1	0.5	14.2	8.4
Jul	87° / 64°	0.1	0.6	14	6.4
Aug	89° / 65°	0.0	0.2	13.3	5.9
Sep	85° / 62°	0.2	0.9	12.2	7.0
Oct	78° / 56°	0.7	2.3	11.1	8.7
Nov	69° / 48°	0.9	3	10.2	7.9
Dec	62° / 43°	2.3	5.2	9.8	6.1

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 11% of January, with mostly cloudy or overcast conditions the remaining 40%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	58	58	58	58	57	58	58	59	59	60	60	60	61	61	61	61	61	61	61	61	60	61	61	60	60	60	61	61	61	61	62
Cloudier (%)	42	42	42	42	43	42	42	41	41	40	40	40	39	39	39	39	39	39	39	39	40	39	39	40	40	40	39	39	39	39	38

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	57	43
6	58	42
7	58	42
8	59	41
9	59	41
10	60	40
11	60	40
12	60	40
13	61	39
14	61	39
15	61	39
16	61	39
17	61	39
18	61	39
19	61	39
20	61	39
21	60	40
22	61	39
23	61	39
24	60	40
25	60	40
26	60	40
27	61	39
28	61	39
29	61	39
30	61	39
31	62	38

Chance of precipitation in January

Any precipitation

Pasadena gets around 3.4 in of rain over 5.8 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 19% and peaks near 19% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	18	18	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	18	18	18	18	18	18	18	18	18	18

	Rain chance (%)
1	18
2	18
3	19
4	19
5	19
6	19
7	19
8	19
9	19
10	19
11	19
12	19
13	19
14	19
15	19
16	19
17	19
18	19
19	19
20	19
21	19
22	18
23	18
24	18
25	18
26	18
27	18
28	18
29	18
30	18
31	18

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in January

Winds average 5 mph in January.

Across January, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

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 7:03 AM to 6:57 AM, and sunset from 4:48 PM to 5:15 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.9	9.9	9.9	9.9	9.9	9.9	10.0	10.0	10.0	10.0	10.0	10.1	10.1	10.1	10.1	10.1	10.2	10.2	10.2	10.2	10.3	10.3
Sunrise (AM)	7:03	7:03	7:03	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:03	7:03	7:03	7:03	7:02	7:02	7:02	7:02	7:01	7:01	7:00	7:00	6:59	6:59	6:58	6:58	6:57
Sunset (PM)	4:48	4:49	4:50	4:51	4:51	4:52	4:53	4:54	4:55	4:55	4:56	4:57	4:58	4:59	5:00	5:01	5:01	5:02	5:03	5:04	5:05	5:06	5:07	5:08	5:09	5:10	5:11	5:12	5:13	5:14	5:15

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.8	7:03	4:48
2	9.8	7:03	4:49
3	9.8	7:03	4:50
4	9.8	7:04	4:51
5	9.8	7:04	4:51
6	9.8	7:04	4:52
7	9.8	7:04	4:53
8	9.8	7:04	4:54
9	9.8	7:04	4:55
10	9.9	7:04	4:55
11	9.9	7:04	4:56
12	9.9	7:04	4:57
13	9.9	7:04	4:58
14	9.9	7:04	4:59
15	9.9	7:03	5:00
16	10.0	7:03	5:01
17	10.0	7:03	5:01
18	10.0	7:03	5:02
19	10.0	7:02	5:03
20	10.0	7:02	5:04
21	10.1	7:02	5:05
22	10.1	7:02	5:06
23	10.1	7:01	5:07
24	10.1	7:01	5:08
25	10.1	7:00	5:09
26	10.2	7:00	5:10
27	10.2	6:59	5:11
28	10.2	6:59	5:12
29	10.2	6:58	5:13
30	10.3	6:58	5:14
31	10.3	6:57	5:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.11 kWh/m².

For context, solar energy here swings from a low near 2.95 kWh/m² to a high of 8.15 kWh/m² in June across the year — January's 3.11 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.1	3.1	3.1	3.1	3.2	3.2	3.2	3.3	3.3	3.3	3.3	3.4	3.4	3.4	3.5	3.5	3.5	3.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.0	Moderate
2	3.0	Moderate
3	3.0	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	3.0	Moderate
7	3.0	Moderate
8	3.0	Moderate
9	3.0	Moderate
10	3.0	Moderate
11	3.0	Moderate
12	3.0	Moderate
13	3.0	Moderate
14	3.1	Moderate
15	3.1	Moderate
16	3.1	Moderate
17	3.1	Moderate
18	3.2	Moderate
19	3.2	Moderate
20	3.2	Moderate
21	3.3	Moderate
22	3.3	Moderate
23	3.3	Moderate
24	3.3	Moderate
25	3.4	Moderate
26	3.4	Moderate
27	3.4	Moderate
28	3.5	Moderate
29	3.5	Moderate
30	3.5	Moderate
31	3.5	Moderate

Planning a trip in January

Is January a good time to visit Pasadena?

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

6.1

Sightseeing

9th-best month of the year

1.3

Beach & pool

11th-best month of the year

January is a reasonable time to visit Pasadena for sightseeing.

What to pack for Pasadena in January

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

In January, Pasadena sees daytime highs around 62°F and nights near 44°F. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Pasadena 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 at the nearest coast (about 23 mi away) is warmest in August at about 68°F and coldest in February near 59°F.

It's comfortable for a long swim from Aug 4 to Sep 13 — about 1.3 months when the water holds above 68°F.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	59	59	59	59	62	65	67	68	68	66	63	60
Comfort	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Refreshing	Refreshing	Cool	Cool	Cool

	Sea temperature (°F)	Comfort
Jan	59	Bracing
Feb	59	Bracing
Mar	59	Bracing
Apr	59	Cool
May	62	Cool
Jun	65	Cool
Jul	67	Cool
Aug	68	Refreshing
Sep	68	Refreshing
Oct	66	Cool
Nov	63	Cool
Dec	60	Cool

UV index in Pasadena 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 Pasadena peaks around July 11 at about 11 (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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	5	5	8	8	11	11	10	8	6	3	3
Level	Moderate	Moderate	Moderate	Very high	Very high	Extreme	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	5	Moderate
Mar	5	Moderate
Apr	8	Very high
May	8	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	10	Extreme
Sep	8	Very high
Oct	6	High
Nov	3	Moderate
Dec	3	Moderate

Air quality in Pasadena 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 Pasadena is worst in December — around 29 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (May, 12 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	18	17	17	15	12	14	25	26	24	18	23	29
Level	Moderate	Moderate	Moderate	Moderate	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	18	Moderate
Feb	17	Moderate
Mar	17	Moderate
Apr	15	Moderate
May	12	Good
Jun	14	Moderate
Jul	25	Moderate
Aug	26	Moderate
Sep	24	Moderate
Oct	18	Moderate
Nov	23	Moderate
Dec	29	Moderate

Location & terrain

Where is Pasadena?

Pasadena sits at 34.1°N, 118.1°W, 863 ft above sea level, in United States. The nearest listed city is South Pasadena, 2.5 mi away.

Topography around Pasadena

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

Within 2 miles, the terrain around Pasadena has only modest variations in elevation — a maximum elevation change of 614 ft around an average of 863 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,971 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,013 ft.

The land around Pasadena is covered by artificial surfaces (57%) and trees (40%) within 2 miles, artificial surfaces (50%) and trees (28%) within 10 miles, and artificial surfaces (24%), grassland (20%) and water (20%) within 50 miles.

2 miles

614 ft

artificial surfaces 57%

10 miles

5,971 ft

artificial surfaces 50%

50 miles

10,013 ft

artificial surfaces 24%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← December Pasadena year-round climate February →Best places to visit in January

January weather nearby: South Pasadena 2.5 mi · Altadena 3.1 mi · Alhambra 3.7 mi · San Gabriel 4.3 mi · La Cañada Flintridge 4.3 mi · Temple City 5.6 mi · Monterey Park 6.2 mi · Rosemead 6.2 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

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 Pasadena (34.1478°, -118.1445°, elevation 863 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).

	Avg high (°F)	Avg low (°F)
1	61	43
2	61	43
3	61	43
4	61	43
5	61	43
6	62	43
7	62	43
8	62	43
9	62	43
10	62	44
11	62	44
12	62	44
13	62	44
14	62	44
15	62	44
16	62	44
17	62	44
18	62	44
19	62	44
20	62	44
21	62	44
22	62	44
23	62	44
24	62	44
25	62	44
26	63	44
27	63	44
28	63	44
29	63	44
30	63	44
31	63	44

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	57	43
6	58	42
7	58	42
8	59	41
9	59	41
10	60	40
11	60	40
12	60	40
13	61	39
14	61	39
15	61	39
16	61	39
17	61	39
18	61	39
19	61	39
20	61	39
21	60	40
22	61	39
23	61	39
24	60	40
25	60	40
26	60	40
27	61	39
28	61	39
29	61	39
30	61	39
31	62	38

	Rain chance (%)
1	18
2	18
3	19
4	19
5	19
6	19
7	19
8	19
9	19
10	19
11	19
12	19
13	19
14	19
15	19
16	19
17	19
18	19
19	19
20	19
21	19
22	18
23	18
24	18
25	18
26	18
27	18
28	18
29	18
30	18
31	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	61	43
2	61	43
3	61	43
4	61	43
5	61	43
6	62	43
7	62	43
8	62	43
9	62	43
10	62	44
11	62	44
12	62	44
13	62	44
14	62	44
15	62	44
16	62	44
17	62	44
18	62	44
19	62	44
20	62	44
21	62	44
22	62	44
23	62	44
24	62	44
25	62	44
26	63	44
27	63	44
28	63	44
29	63	44
30	63	44
31	63	44

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	57	43
6	58	42
7	58	42
8	59	41
9	59	41
10	60	40
11	60	40
12	60	40
13	61	39
14	61	39
15	61	39
16	61	39
17	61	39
18	61	39
19	61	39
20	61	39
21	60	40
22	61	39
23	61	39
24	60	40
25	60	40
26	60	40
27	61	39
28	61	39
29	61	39
30	61	39
31	62	38

	Rain chance (%)
1	18
2	18
3	19
4	19
5	19
6	19
7	19
8	19
9	19
10	19
11	19
12	19
13	19
14	19
15	19
16	19
17	19
18	19
19	19
20	19
21	19
22	18
23	18
24	18
25	18
26	18
27	18
28	18
29	18
30	18
31	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	61	43
2	61	43
3	61	43
4	61	43
5	61	43
6	62	43
7	62	43
8	62	43
9	62	43
10	62	44
11	62	44
12	62	44
13	62	44
14	62	44
15	62	44
16	62	44
17	62	44
18	62	44
19	62	44
20	62	44
21	62	44
22	62	44
23	62	44
24	62	44
25	62	44
26	63	44
27	63	44
28	63	44
29	63	44
30	63	44
31	63	44

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	57	43
6	58	42
7	58	42
8	59	41
9	59	41
10	60	40
11	60	40
12	60	40
13	61	39
14	61	39
15	61	39
16	61	39
17	61	39
18	61	39
19	61	39
20	61	39
21	60	40
22	61	39
23	61	39
24	60	40
25	60	40
26	60	40
27	61	39
28	61	39
29	61	39
30	61	39
31	62	38

	Rain chance (%)
1	18
2	18
3	19
4	19
5	19
6	19
7	19
8	19
9	19
10	19
11	19
12	19
13	19
14	19
15	19
16	19
17	19
18	19
19	19
20	19
21	19
22	18
23	18
24	18
25	18
26	18
27	18
28	18
29	18
30	18
31	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100