Aliso Viejo weather in October

In October, Aliso Viejo sees average daytime highs of 71°F and overnight lows near 61°F, with 0.6 in of rain across 2 wet days and about 11.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 73°F in the first days to 70°F by the end. The sky is clear or mostly clear about 70% of the time in October, and the air most often feels comfortable.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 42 min by month's end. Set against the rest of the year, October is Aliso Viejo's 5th-clearest and 9th-windiest month. For the whole year in context, see Aliso Viejo's year-round climate.

Daytime high
71°
4th warmest
Overnight low
61°
9th coldest
Rainfall
0.6 in
2 wet days
Daylight
11 h 06 min
6:01 AM – 5:10 PM
Cloud cover
27%
5th clearest
Wind
5 mph
9th windiest
Solar energy
4.68 kWh/m²
Travel score
8.5
out of 10

Aliso Viejo is city in Orange County, California, United States.

Density
2,801/km²
people per km²
Founded
2001

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 73°F in the first days to 70°F by the end.

A typical October day in Aliso Viejo reaches about 71°F in the afternoon and slips back to 61°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 80°F. Set against its neighbours, October runs about 3°F cooler than September and about 5°F warmer than November.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17363
27363
37363
47363
57363
67363
77362
87362
97262
107262
117262
127262
137262
147262
157262
167262
177161
187161
197161
207161
217161
227161
237160
247160
257060
267060
277060
287060
297059
306959
316959

Aliso Viejo weather by month

How October compares with the rest of the year at a glance. October is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 51°2.65.5106.2
Feb62° / 52°3.16.310.85.9
Mar63° / 53°1.85.711.76.3
Apr64° / 55°0.82.912.87.2
May66° / 58°0.31.713.77.7
Jun69° / 61°0.10.414.28.5
Jul73° / 64°0.10.4149.2
Aug75° / 66°0.00.213.29.6
Sep74° / 65°0.10.612.29.3
Oct71° / 61°0.6211.28.5
Nov67° / 56°0.82.810.37.7
Dec62° / 51°1.94.89.86.4

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28812
38812
48812
58812
68713
78713
88713
98713
108614
118515
128515
138416
148416
158317
168218
178218
188218
198020
208020
218020
228020
238020
248020
258020
268020
278119
288119
298119
308020
318020

Chance of precipitation in October

Any precipitation

Aliso Viejo gets around 0.6 in of rain over 2 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 6% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
55
65
75
86
96
106
116
126
136
146
156
166
176
186
196
207
217
227
237
247
257
267
277
287
298
308
318

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the comfortable band about 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11038439
21139428
31240408
41341397
51442387
61442376
71543366
81644355
91744345
101844334
111845334
121945324
131946313
141946313
152047303
162147293
172247283
182348272
192448252
202648242
212748222
222949211
233149191
243349171
253549161
263749141
273949120
284148110
294348100
30454780
31464670

Wind in October

Winds average 5 mph in October.

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

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over October. Sunrise moves from 5:50 AM to 6:14 AM, and sunset from 5:30 PM to 4:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:505:30
211.65:515:29
311.65:515:27
411.65:525:26
511.55:535:25
611.55:545:23
711.55:545:22
811.45:555:21
911.45:565:19
1011.45:575:18
1111.35:575:17
1211.35:585:15
1311.35:595:14
1411.26:005:13
1511.26:015:12
1611.16:015:10
1711.16:025:09
1811.16:035:08
1911.06:045:07
2011.06:055:06
2111.06:065:05
2211.06:065:04
2310.96:075:02
2410.96:085:01
2510.96:095:00
2610.86:104:59
2710.86:114:58
2810.86:124:57
2910.76:134:56
3010.76:144:55
3110.76:144:54

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.68 kWh/m².

For context, solar energy here swings from a low near 3 kWh/m² to a high of 7.72 kWh/m² in June across the year — October's 4.68 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.7Bright
164.7Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.3Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in October

Is October a good time to visit Aliso Viejo?

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

8.5
Sightseeing
4th-best month of the year
5.8
Beach & pool
4th-best month of the year

October is one of the better times to visit Aliso Viejo for general sightseeing.

What to pack for Aliso Viejo in October

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

In October, Aliso Viejo sees daytime highs around 71°F and nights near 61°F. Worth packing: sun protection.

sun protection

Sea temperature near Aliso Viejo in October

The nearest coast averages about 67°F in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 9 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 Aliso Viejo in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aliso Viejo 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 Aliso Viejo 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 Aliso Viejo 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 Aliso Viejo?

Aliso Viejo sits at 33.6°N, 117.7°W, 469 ft above sea level, in United States. The nearest listed city is Laguna Woods, 3.1 mi away.

Topography around Aliso Viejo

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

Within 2 miles, the terrain around Aliso Viejo has significant variations in elevation — a maximum elevation change of 935 ft around an average of 400 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,663 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,967 ft.

The land around Aliso Viejo is covered by artificial surfaces (44%) and trees (35%) within 2 miles, artificial surfaces (31%), water (26%) and trees (21%) within 10 miles, and water (36%) and artificial surfaces (26%) within 50 miles.

2 miles
935 ft
10 miles
1,663 ft
50 miles
9,967 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Laguna Woods 3.1 mi · Laguna Niguel 3.1 mi · Laguna Hills 3.1 mi · Laguna Beach 3.7 mi · Mission Viejo 3.7 mi · Ladera Ranch 5.6 mi · San Juan Capistrano 5.6 mi · Lake Forest 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
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 Aliso Viejo (33.565°, -117.7271°, elevation 469 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).