San Diego weather in October

In October, San Diego sees average daytime highs of 29°C and overnight lows near 22°C, with 508 mm of rain across 30 wet days and about 11.8 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 2% of the time in October, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of October to 11 h 36 min by month's end. Set against the rest of the year, October is San Diego's 7th-clearest and 11th-windiest month. For the whole year in context, see San Diego's year-round climate.

Daytime high: 29°; 11th warmest
Overnight low: 22°; 6th coldest
Rainfall: 508 mm; 30 wet days
Daylight: 11 h 48 min; 5:45 AM – 5:31 PM
Cloud cover: 88%; 7th clearest
Wind: 4 km/h; 11th windiest
Solar energy: 4.48 kWh/m²
Travel score: 2.9; out of 10

← September San Diego year-round climate November →Best places to visit in October

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical October day in San Diego reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, October runs about 1°C cooler than September and on par with November.

	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 (°C)	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	28	28	28	28	28	28	28
Avg low (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

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

How October really feels in San Diego

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

San Diego weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 20°	53	7	11.5	5.8
Feb	30° / 21°	74	8	11.7	5.5
Mar	30° / 21°	189	14.5	11.9	4.7
Apr	29° / 22°	410	24.2	12.2	3.4
May	29° / 23°	569	30.6	12.5	2.7
Jun	30° / 22°	385	28.2	12.6	2.8
Jul	30° / 22°	260	27.3	12.5	2.7
Aug	30° / 22°	379	28.8	12.3	2.6
Sep	30° / 22°	471	29.4	12.1	2.6
Oct	29° / 22°	508	30	11.8	2.9
Nov	28° / 21°	355	26.3	11.5	3.5
Dec	29° / 21°	130	16	11.4	4.8

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 5% of October, with mostly cloudy or overcast conditions the remaining 92%.

	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 (%)	5	5	5	4	4	4	4	4	4	4	4	5	6	6	6	7	8	8	9	9	9	9	11	11	11	11	11	11	12	13	13
Cloudier (%)	95	95	95	96	96	96	96	96	96	96	96	95	94	94	94	93	92	92	91	91	91	91	89	89	89	89	89	89	88	87	87

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	4	96
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	5	95
13	6	94
14	6	94
15	6	94
16	7	93
17	8	92
18	8	92
19	9	91
20	9	91
21	9	91
22	9	91
23	11	89
24	11	89
25	11	89
26	11	89
27	11	89
28	11	89
29	12	88
30	13	87
31	13	87

Chance of precipitation in October

Any precipitation

San Diego gets around 508 mm of rain over 30 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 97% and peaks near 98% 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 (%)	98	98	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	96	96	96	95	95	95	94	94

	Rain chance (%)
1	98
2	98
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	96
25	96
26	96
27	95
28	95
29	95
30	94
31	94

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the muggy band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	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
Humid (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1
Muggy (%)	73	73	73	72	72	72	71	70	70	69	68	68	67	66	65	65	64	64	63	62	61	61	60	59	59	57	57	56	56	56	55
Oppressive (%)	27	27	27	28	28	28	29	30	30	31	32	32	33	34	35	35	36	36	37	38	39	39	40	41	41	42	42	43	43	43	44

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	73	27
2	0	73	27
3	0	73	27
4	0	72	28
5	0	72	28
6	0	72	28
7	0	71	29
8	0	70	30
9	0	70	30
10	0	69	31
11	0	68	32
12	0	68	32
13	0	67	33
14	0	66	34
15	0	65	35
16	0	65	35
17	0	64	36
18	0	64	36
19	0	63	37
20	0	62	38
21	0	61	39
22	0	61	39
23	0	60	40
24	0	59	41
25	0	59	41
26	1	57	42
27	1	57	42
28	1	56	43
29	1	56	43
30	1	56	43
31	1	55	44

Wind in October

Winds average 4 km/h in October.

Across October, daily wind ranges from about 4 km/h on the calmest days to 4 km/h 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 (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	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 (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	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 October

DaylightNight

Daylight runs from about 11 h 54 min at the start of October to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over October. Sunrise moves from 5:44 AM to 5:47 AM, and sunset from 5:39 PM to 5:25 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)	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.7	11.6	11.6
Sunrise (AM)	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:44	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:46	5:46	5:46	5:46	5:46	5:47	5:47	5:47	5:47
Sunset (PM)	5:39	5:38	5:38	5:37	5:37	5:36	5:35	5:35	5:34	5:34	5:33	5:33	5:32	5:32	5:31	5:31	5:30	5:30	5:29	5:29	5:29	5:28	5:28	5:27	5:27	5:27	5:26	5:26	5:26	5:26	5:25

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	5:44	5:39
2	11.9	5:44	5:38
3	11.9	5:44	5:38
4	11.9	5:44	5:37
5	11.9	5:44	5:37
6	11.9	5:44	5:36
7	11.9	5:44	5:35
8	11.8	5:44	5:35
9	11.8	5:44	5:34
10	11.8	5:44	5:34
11	11.8	5:44	5:33
12	11.8	5:44	5:33
13	11.8	5:45	5:32
14	11.8	5:45	5:32
15	11.8	5:45	5:31
16	11.8	5:45	5:31
17	11.8	5:45	5:30
18	11.7	5:45	5:30
19	11.7	5:45	5:29
20	11.7	5:45	5:29
21	11.7	5:45	5:29
22	11.7	5:45	5:28
23	11.7	5:46	5:28
24	11.7	5:46	5:27
25	11.7	5:46	5:27
26	11.7	5:46	5:27
27	11.7	5:46	5:26
28	11.7	5:47	5:26
29	11.7	5:47	5:26
30	11.6	5:47	5:26
31	11.6	5:47	5:25

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.48 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 5.87 kWh/m² in February across the year — October's 4.48 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)	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.6	Bright
2	4.6	Bright
3	4.6	Bright
4	4.6	Bright
5	4.6	Bright
6	4.6	Bright
7	4.6	Bright
8	4.5	Bright
9	4.5	Bright
10	4.5	Bright
11	4.5	Bright
12	4.5	Bright
13	4.5	Bright
14	4.5	Bright
15	4.5	Bright
16	4.5	Bright
17	4.5	Bright
18	4.5	Bright
19	4.4	Bright
20	4.4	Bright
21	4.4	Bright
22	4.4	Bright
23	4.4	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.4	Bright
31	4.4	Bright

Planning a trip in October

Is October a good time to visit San Diego?

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

2.9

Sightseeing

7th-best month of the year

3.7

Beach & pool

10th-best month of the year

October is a weaker month for outdoor sightseeing in San Diego.

What to pack for San Diego in October

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

In October, San Diego sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 30 days see rain.

light clothesrain gear

UV index in San Diego in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Diego peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	13	13	14	12	13	12	13	13	12	10	10
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	13	Extreme
Mar	13	Extreme
Apr	14	Extreme
May	12	Extreme
Jun	13	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	13	Extreme
Oct	12	Extreme
Nov	10	Extreme
Dec	10	Very high

Air quality in San Diego in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Diego is worst in March — around 34 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (December, 9 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)	11	19	34	23	20	21	21	17	13	12	10	9
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	19	Moderate
Mar	34	Moderate
Apr	23	Moderate
May	20	Moderate
Jun	21	Moderate
Jul	21	Moderate
Aug	17	Moderate
Sep	13	Moderate
Oct	12	Good
Nov	10	Good
Dec	9	Good

Location & terrain

Where is San Diego?

San Diego sits at 10.3°N, 73.2°W, 180 m above sea level, in Colombia. The nearest listed city is Valledupar, 17 km away.

Topography around San Diego

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Diego.

Within 3 km, the terrain around San Diego has only modest variations in elevation — a maximum elevation change of 215 m around an average of 170 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,747 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,632 m.

The land around San Diego is covered by grassland (49%) and trees (40%) within 3 km, trees (55%) and grassland (38%) within 16 km, and trees (64%) and grassland (31%) within 80 km.

3 km

215 m

grassland 49%

16 km

1,747 m

trees 55%

80 km

5,632 m

trees 64%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← September San Diego year-round climate November →Best places to visit in October

October weather nearby: Valledupar 17 km · Agustín Codazzi 34 km · Villanueva 38 km · San Juan del Cesar 52 km · Becerril 71 km · Fonseca 71 km · Machiques 75 km · Barrancas 81 km

Colombia travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type A / B; 120 / 240 V · 60 Hz
Prices: ≈ 38% of US; price level, 2025
GDP per capita: $8,562; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 74%; of population, 2024
Homicide rate: 24.9; per 100k, 2023
Road deaths: 15.4; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 480
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 San Diego (10.3338°, -73.1805°, elevation 180 m), 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. 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 (°C)	Avg low (°C)
1	29	22
2	29	22
3	29	22
4	29	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	28	22
26	28	22
27	28	22
28	28	22
29	28	22
30	28	22
31	28	22

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	4	96
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	5	95
13	6	94
14	6	94
15	6	94
16	7	93
17	8	92
18	8	92
19	9	91
20	9	91
21	9	91
22	9	91
23	11	89
24	11	89
25	11	89
26	11	89
27	11	89
28	11	89
29	12	88
30	13	87
31	13	87

	Rain chance (%)
1	98
2	98
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	96
25	96
26	96
27	95
28	95
29	95
30	94
31	94

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	73	27
2	0	73	27
3	0	73	27
4	0	72	28
5	0	72	28
6	0	72	28
7	0	71	29
8	0	70	30
9	0	70	30
10	0	69	31
11	0	68	32
12	0	68	32
13	0	67	33
14	0	66	34
15	0	65	35
16	0	65	35
17	0	64	36
18	0	64	36
19	0	63	37
20	0	62	38
21	0	61	39
22	0	61	39
23	0	60	40
24	0	59	41
25	0	59	41
26	1	57	42
27	1	57	42
28	1	56	43
29	1	56	43
30	1	56	43
31	1	55	44

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

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	4	96
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	5	95
13	6	94
14	6	94
15	6	94
16	7	93
17	8	92
18	8	92
19	9	91
20	9	91
21	9	91
22	9	91
23	11	89
24	11	89
25	11	89
26	11	89
27	11	89
28	11	89
29	12	88
30	13	87
31	13	87

	Rain chance (%)
1	98
2	98
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	96
25	96
26	96
27	95
28	95
29	95
30	94
31	94

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	73	27
2	0	73	27
3	0	73	27
4	0	72	28
5	0	72	28
6	0	72	28
7	0	71	29
8	0	70	30
9	0	70	30
10	0	69	31
11	0	68	32
12	0	68	32
13	0	67	33
14	0	66	34
15	0	65	35
16	0	65	35
17	0	64	36
18	0	64	36
19	0	63	37
20	0	62	38
21	0	61	39
22	0	61	39
23	0	60	40
24	0	59	41
25	0	59	41
26	1	57	42
27	1	57	42
28	1	56	43
29	1	56	43
30	1	56	43
31	1	55	44

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

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	4	96
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	5	95
13	6	94
14	6	94
15	6	94
16	7	93
17	8	92
18	8	92
19	9	91
20	9	91
21	9	91
22	9	91
23	11	89
24	11	89
25	11	89
26	11	89
27	11	89
28	11	89
29	12	88
30	13	87
31	13	87

	Rain chance (%)
1	98
2	98
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	97
19	97
20	97
21	97
22	97
23	97
24	96
25	96
26	96
27	95
28	95
29	95
30	94
31	94

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	73	27
2	0	73	27
3	0	73	27
4	0	72	28
5	0	72	28
6	0	72	28
7	0	71	29
8	0	70	30
9	0	70	30
10	0	69	31
11	0	68	32
12	0	68	32
13	0	67	33
14	0	66	34
15	0	65	35
16	0	65	35
17	0	64	36
18	0	64	36
19	0	63	37
20	0	62	38
21	0	61	39
22	0	61	39
23	0	60	40
24	0	59	41
25	0	59	41
26	1	57	42
27	1	57	42
28	1	56	43
29	1	56	43
30	1	56	43
31	1	55	44