American Canyon weather in October

In October, American Canyon sees average daytime highs of 76°F and overnight lows near 52°F, with 1.0 in of rain across 2.9 wet days and about 11 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 80°F in the first days to 72°F by the end. The sky is clear or mostly clear about 69% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 24 min by month's end. Set against the rest of the year, October is American Canyon's 5th-clearest and 10th-windiest month. For the whole year in context, see American Canyon's year-round climate.

Daytime high
76°
5th warmest
Overnight low
52°
8th coldest
Rainfall
1.0 in
2.9 wet days
Daylight
11 hours
6:24 AM – 5:24 PM
Cloud cover
29%
5th clearest
Wind
4 mph
10th windiest
Solar energy
4.2 kWh/m²
Travel score
8.5
out of 10

American Canyon is city in Napa Valley, California, United States.

Density
1,638/km²
people per km²
Founded
1992

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 80°F in the first days to 72°F by the end.

A typical October day in American Canyon reaches about 76°F in the afternoon and slips back to 52°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 87°F. Set against its neighbours, October runs about 6°F cooler than September and about 12°F warmer than November.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18055
28054
38054
48054
57954
67954
77954
87954
97853
107853
117853
127853
137853
147753
157753
167753
177652
187652
197652
207552
217552
227552
237451
247451
257351
267351
277350
287250
297250
307150
317149

American Canyon weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan58° / 42°4.69.49.64.3
Feb61° / 44°4.68.610.55.1
Mar65° / 46°3.48.411.76.2
Apr69° / 48°1.54.9137.4
May76° / 52°0.83.2148.4
Jun82° / 56°0.20.914.68.1
Jul84° / 57°0.00.114.47.6
Aug84° / 57°0.00.213.57.5
Sep83° / 56°0.10.412.38.0
Oct76° / 52°1.02.9118.5
Nov65° / 46°2.25.99.96.5
Dec57° / 42°4.39.39.44.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 11% of October, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18713
28713
38713
48515
58515
68416
78416
88317
98218
108119
118119
128020
138020
147921
157921
167921
177921
187822
197822
207723
217624
227624
237624
247525
257525
267525
277426
287426
297327
307228
317129

Chance of precipitation in October

Any precipitation

American Canyon gets around 1.0 in of rain over 2.9 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 9% and peaks near 15% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
66
76
86
96
106
117
127
137
147
157
167
178
188
199
209
2110
2210
2311
2412
2512
2613
2713
2814
2914
3015
3115

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
190100
290100
39190
49190
59190
69280
79280
89280
99280
109181
119181
129181
139181
149181
159181
169181
179181
189181
199181
209181
219181
229271
239370
249370
259370
269370
279370
289370
299460
309460
319460

Wind in October

Winds average 4 mph in October.

Across October, 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.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
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 October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:10 AM to 6:40 AM, and sunset from 5:46 PM to 5:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:105:46
211.66:115:45
311.56:125:43
411.56:135:42
511.46:145:40
611.46:145:39
711.46:155:37
811.36:165:35
911.36:175:34
1011.26:185:32
1111.26:195:31
1211.26:205:30
1311.16:215:28
1411.16:225:27
1511.06:235:25
1611.06:245:24
1711.06:255:22
1810.96:265:21
1910.96:275:20
2010.86:285:18
2110.86:295:17
2210.86:305:16
2310.76:325:15
2410.76:335:13
2510.66:345:12
2610.66:355:11
2710.66:365:10
2810.56:375:08
2910.56:385:07
3010.56:395:06
3110.46:405:05

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.2 kWh/m².

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 8.05 kWh/m² in July across the year — October's 4.2 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
44.9Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
313.4Moderate
Planning a trip in October

Hazard calendar for American Canyon

In seasonPeak

None of American Canyon's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

American Canyon's rainy season runs November–March, when most of the year's rain falls.

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

Is October a good time to visit American Canyon?

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

8.5
Sightseeing
1st-best month of the year
7.3
Beach & pool
5th-best month of the year

October is one of the better times to visit American Canyon for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for American Canyon in October

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

In October, American Canyon sees daytime highs around 76°F and nights near 52°F. Worth packing: light clothes.

light clothes

Sea temperature near American Canyon in October

The nearest coast averages about 57°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 29 mi away) is warmest in September at about 58°F and coldest in April near 53°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan53Bracing
Feb53Bracing
Mar54Bracing
Apr53Bracing
May53Bracing
Jun54Bracing
Jul56Bracing
Aug58Bracing
Sep58Bracing
Oct57Bracing
Nov55Bracing
Dec54Bracing

UV index in American Canyon in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in American Canyon peaks around July 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 11UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Low

Air quality in American Canyon 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 American Canyon is worst in September — around 29 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1829 µg/m³Jun 127 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul10Good
Aug25Moderate
Sep29Moderate
Oct27Moderate
Nov16Moderate
Dec12Good
Location & terrain

Where is American Canyon?

American Canyon sits at 38.2°N, 122.3°W, 46 ft above sea level, in United States. The nearest listed city is Vallejo, 5.0 mi away.

Topography around American Canyon

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

Within 2 miles, the terrain around American Canyon has only modest variations in elevation — a maximum elevation change of 817 ft around an average of 82 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,903 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,459 ft.

The land around American Canyon is covered by artificial surfaces (33%) and grassland (31%) within 2 miles, grassland (38%) and water (23%) within 10 miles, and grassland (29%), trees (25%) and water (22%) within 50 miles.

2 miles
817 ft
10 miles
1,903 ft
50 miles
4,459 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
October weather nearby: Vallejo 5.0 mi · Napa 8.7 mi · Benicia 11 mi · Hercules 11 mi · Pinole 12 mi · Suisun 13 mi · Martinez 13 mi · Fairfield 13 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 American Canyon (38.1749°, -122.2608°, elevation 46 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).