Mount Vernon weather in October

In October, Mount Vernon sees average daytime highs of 55°F and overnight lows near 44°F, with 7.9 in of precipitation across 15.2 wet days and about 10.6 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 60°F in the first days to 51°F by the end. The sky is clear or mostly clear about 23% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of October to 9 h 42 min by month's end. Set against the rest of the year, October is Mount Vernon's 6th-clearest and 6th-windiest month. For the whole year in context, see Mount Vernon's year-round climate.

Daytime high
55°
6th warmest
Overnight low
44°
7th coldest
Precipitation
7.9 in
15.2 wet days
Daylight
10 h 30 min
6:38 AM – 5:11 PM
Cloud cover
67%
6th clearest
Wind
4 mph
6th windiest
Solar energy
2.22 kWh/m²
Travel score
3.2
out of 10

Mount Vernon is city in Skagit County, Washington, United States.

Density
1,050/km²
people per km²
Founded
1870

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 60°F in the first days to 51°F by the end.

A typical October day in Mount Vernon reaches about 55°F in the afternoon and slips back to 44°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 62°F. Set against its neighbours, October runs about 10°F cooler than September and about 9°F warmer than November.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16148
26048
36048
46047
55947
65947
75847
85846
95846
105746
115746
125645
135645
145645
155645
165544
175544
185544
195444
205443
215443
225343
235342
245342
255242
265242
275242
285141
295141
305141
315141

How October really feels in Mount Vernon

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
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.

Mount Vernon weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan42° / 34°10.219.19.58.60.2
Feb44° / 34°6.715.499.90.7
Mar48° / 37°8.119.79.811.61.4
Apr53° / 41°5.816.6413.42.5
May60° / 47°4.112.80.7154.4
Jun64° / 51°3.110.9015.85.5
Jul70° / 55°1.55.6015.57.4
Aug71° / 56°1.85.7014.17.5
Sep65° / 51°3.99.5012.46.1
Oct55° / 44°7.915.20.710.63.2
Nov46° / 37°11.419.47.791.0
Dec41° / 33°10.01912.28.20.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24852
34753
44654
54456
64258
74159
84060
93862
103763
113565
123565
133466
143367
153367
163268
173268
183268
193268
203268
213169
223169
233169
243169
253268
263268
273169
283070
293070
303070
312872

Chance of precipitation in October

Any precipitationSnow

Mount Vernon gets around 7.9 in of rain and snow over 15.2 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 49% and peaks near 56% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1340
2350
3360
4370
5390
6400
7410
8430
9440
10451
11471
12481
13501
14511
15522
16522
17532
18532
19533
20543
21543
22544
23544
24545
25545
26556
27556
28557
29558
30559
315610

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1946
2955
3955
4964
5973
6973
7973
8982
9982
10982
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
251000
261000
271000
281000
291000
301000
311000

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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 24 min at the start of October to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over October. Sunrise moves from 6:15 AM to 7:01 AM, and sunset from 5:42 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:155:42
211.46:175:39
311.36:185:37
411.36:205:35
511.26:215:33
611.16:235:31
711.16:245:29
811.06:265:27
911.06:275:25
1010.96:295:23
1110.86:305:21
1210.86:325:19
1310.76:335:17
1410.76:355:15
1510.66:365:13
1610.56:385:11
1710.56:395:09
1810.46:415:07
1910.46:435:05
2010.36:445:03
2110.36:465:01
2210.26:475:00
2310.26:494:58
2410.16:504:56
2510.06:524:54
2610.06:544:53
279.96:554:51
289.96:574:49
299.86:584:48
309.87:004:46
319.77:014:44

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.22 kWh/m².

For context, solar energy here swings from a low near 0.85 kWh/m² to a high of 6.27 kWh/m² in July across the year — October's 2.22 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.0Moderate
33.0Moderate
42.9Moderate
52.9Moderate
62.8Moderate
72.7Moderate
82.6Moderate
92.6Moderate
102.5Moderate
112.5Moderate
122.4Moderate
132.3Moderate
142.3Moderate
152.2Moderate
162.2Moderate
172.1Moderate
182.1Moderate
192.0Moderate
202.0Dim
211.9Dim
221.9Dim
231.9Dim
241.8Dim
251.8Dim
261.8Dim
271.7Dim
281.7Dim
291.7Dim
301.6Dim
311.6Dim
Planning a trip in October

Hazard calendar for Mount Vernon

In seasonPeak

In October, Mount Vernon sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Mount Vernon's rainy season runs October–April, 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 Mount Vernon?

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

3.2
Sightseeing
6th-best month of the year
0.1
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Mount Vernon.

What to pack for Mount Vernon in October

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

In October, Mount Vernon sees daytime highs around 55°F and nights near 44°F. Pack rain gear. Worth having: a warm layer. About 15 days see rain.

rain geara warm layer

Sea temperature near Mount Vernon in October

The nearest coast averages about 50°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 25 mi away) is warmest in August at about 54°F and coldest in February near 46°F.

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

45°50°55°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan46Bracing
Feb46Bracing
Mar47Bracing
Apr48Bracing
May50Bracing
Jun52Bracing
Jul53Bracing
Aug54Bracing
Sep53Bracing
Oct50Bracing
Nov49Bracing
Dec47Bracing

UV index in Mount Vernon in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mount Vernon peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Mount Vernon 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 Mount Vernon is worst in September — around 18 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1018 µg/m³Dec 176 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar12Good
Apr12Good
May12Good
Jun11Good
Jul11Good
Aug18Moderate
Sep18Moderate
Oct12Good
Nov7Good
Dec6Good
Location & terrain

Where is Mount Vernon?

Mount Vernon sits at 48.4°N, 122.3°W, 95 ft above sea level, in United States. The nearest listed city is Anacortes, 14 mi away.

Topography around Mount Vernon

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

Within 2 miles, the terrain around Mount Vernon has significant variations in elevation — a maximum elevation change of 938 ft around an average of 89 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,045 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,755 ft.

The land around Mount Vernon is covered by trees (29%), grassland (28%) and artificial surfaces (27%) within 2 miles, trees (41%) and grassland (25%) within 10 miles, and trees (57%) and water (29%) within 50 miles.

2 miles
938 ft
10 miles
4,045 ft
50 miles
10,755 ft
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewaterwetland
October weather nearby: Anacortes 14 mi · Oak Harbor 17 mi · Arlington 18 mi · Bellingham 24 mi · Marysville 27 mi · Lake Stevens 30 mi · Everett 31 mi · West Lake Stevens 32 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 Mount Vernon (48.4212°, -122.3341°, elevation 95 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).