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
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.
| 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 | 60 | 60 | 60 | 59 | 59 | 58 | 58 | 58 | 57 | 57 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 52 | 51 | 51 | 51 | 51 |
| Avg low (°F) | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 41 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 61 | 48 |
| 2 | 60 | 48 |
| 3 | 60 | 48 |
| 4 | 60 | 47 |
| 5 | 59 | 47 |
| 6 | 59 | 47 |
| 7 | 58 | 47 |
| 8 | 58 | 46 |
| 9 | 58 | 46 |
| 10 | 57 | 46 |
| 11 | 57 | 46 |
| 12 | 56 | 45 |
| 13 | 56 | 45 |
| 14 | 56 | 45 |
| 15 | 56 | 45 |
| 16 | 55 | 44 |
| 17 | 55 | 44 |
| 18 | 55 | 44 |
| 19 | 54 | 44 |
| 20 | 54 | 43 |
| 21 | 54 | 43 |
| 22 | 53 | 43 |
| 23 | 53 | 42 |
| 24 | 53 | 42 |
| 25 | 52 | 42 |
| 26 | 52 | 42 |
| 27 | 52 | 42 |
| 28 | 51 | 41 |
| 29 | 51 | 41 |
| 30 | 51 | 41 |
| 31 | 51 | 41 |
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.
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.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 42° / 34° | 10.2 | 19.1 | 9.5 | 8.6 | 0.2 |
| Feb | 44° / 34° | 6.7 | 15.4 | 9 | 9.9 | 0.7 |
| Mar | 48° / 37° | 8.1 | 19.7 | 9.8 | 11.6 | 1.4 |
| Apr | 53° / 41° | 5.8 | 16.6 | 4 | 13.4 | 2.5 |
| May | 60° / 47° | 4.1 | 12.8 | 0.7 | 15 | 4.4 |
| Jun | 64° / 51° | 3.1 | 10.9 | 0 | 15.8 | 5.5 |
| Jul | 70° / 55° | 1.5 | 5.6 | 0 | 15.5 | 7.4 |
| Aug | 71° / 56° | 1.8 | 5.7 | 0 | 14.1 | 7.5 |
| Sep | 65° / 51° | 3.9 | 9.5 | 0 | 12.4 | 6.1 |
| Oct | 55° / 44° | 7.9 | 15.2 | 0.7 | 10.6 | 3.2 |
| Nov | 46° / 37° | 11.4 | 19.4 | 7.7 | 9 | 1.0 |
| Dec | 41° / 33° | 10.0 | 19 | 12.2 | 8.2 | 0.1 |
Cloud cover in October
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.
| 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 (%) | 50 | 48 | 47 | 46 | 44 | 42 | 41 | 40 | 38 | 37 | 35 | 35 | 34 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 32 | 31 | 30 | 30 | 30 | 28 |
| Cloudier (%) | 50 | 52 | 53 | 54 | 56 | 58 | 59 | 60 | 62 | 63 | 65 | 65 | 66 | 67 | 67 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 68 | 68 | 69 | 70 | 70 | 70 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 48 | 52 |
| 3 | 47 | 53 |
| 4 | 46 | 54 |
| 5 | 44 | 56 |
| 6 | 42 | 58 |
| 7 | 41 | 59 |
| 8 | 40 | 60 |
| 9 | 38 | 62 |
| 10 | 37 | 63 |
| 11 | 35 | 65 |
| 12 | 35 | 65 |
| 13 | 34 | 66 |
| 14 | 33 | 67 |
| 15 | 33 | 67 |
| 16 | 32 | 68 |
| 17 | 32 | 68 |
| 18 | 32 | 68 |
| 19 | 32 | 68 |
| 20 | 32 | 68 |
| 21 | 31 | 69 |
| 22 | 31 | 69 |
| 23 | 31 | 69 |
| 24 | 31 | 69 |
| 25 | 32 | 68 |
| 26 | 32 | 68 |
| 27 | 31 | 69 |
| 28 | 30 | 70 |
| 29 | 30 | 70 |
| 30 | 30 | 70 |
| 31 | 28 | 72 |
Chance of precipitation in October
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.
| 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 (%) | 34 | 35 | 36 | 37 | 39 | 40 | 41 | 43 | 44 | 45 | 47 | 48 | 50 | 51 | 52 | 52 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 55 | 56 |
| Snow chance (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 10 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 34 | 0 |
| 2 | 35 | 0 |
| 3 | 36 | 0 |
| 4 | 37 | 0 |
| 5 | 39 | 0 |
| 6 | 40 | 0 |
| 7 | 41 | 0 |
| 8 | 43 | 0 |
| 9 | 44 | 0 |
| 10 | 45 | 1 |
| 11 | 47 | 1 |
| 12 | 48 | 1 |
| 13 | 50 | 1 |
| 14 | 51 | 1 |
| 15 | 52 | 2 |
| 16 | 52 | 2 |
| 17 | 53 | 2 |
| 18 | 53 | 2 |
| 19 | 53 | 3 |
| 20 | 54 | 3 |
| 21 | 54 | 3 |
| 22 | 54 | 4 |
| 23 | 54 | 4 |
| 24 | 54 | 5 |
| 25 | 54 | 5 |
| 26 | 55 | 6 |
| 27 | 55 | 6 |
| 28 | 55 | 7 |
| 29 | 55 | 8 |
| 30 | 55 | 9 |
| 31 | 56 | 10 |
Humidity in October
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.
| 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 (%) | 94 | 95 | 95 | 96 | 97 | 97 | 97 | 98 | 98 | 98 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 6 | 5 | 5 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 94 | 6 |
| 2 | 95 | 5 |
| 3 | 95 | 5 |
| 4 | 96 | 4 |
| 5 | 97 | 3 |
| 6 | 97 | 3 |
| 7 | 97 | 3 |
| 8 | 98 | 2 |
| 9 | 98 | 2 |
| 10 | 98 | 2 |
| 11 | 99 | 1 |
| 12 | 99 | 1 |
| 13 | 99 | 1 |
| 14 | 99 | 1 |
| 15 | 99 | 1 |
| 16 | 99 | 1 |
| 17 | 99 | 1 |
| 18 | 99 | 1 |
| 19 | 99 | 1 |
| 20 | 99 | 1 |
| 21 | 99 | 1 |
| 22 | 99 | 1 |
| 23 | 99 | 1 |
| 24 | 99 | 1 |
| 25 | 100 | 0 |
| 26 | 100 | 0 |
| 27 | 100 | 0 |
| 28 | 100 | 0 |
| 29 | 100 | 0 |
| 30 | 100 | 0 |
| 31 | 100 | 0 |
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.
| 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) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 | 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 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in October
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.
| 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) | 11.4 | 11.4 | 11.3 | 11.3 | 11.2 | 11.1 | 11.1 | 11.0 | 11.0 | 10.9 | 10.8 | 10.8 | 10.7 | 10.7 | 10.6 | 10.5 | 10.5 | 10.4 | 10.4 | 10.3 | 10.3 | 10.2 | 10.2 | 10.1 | 10.0 | 10.0 | 9.9 | 9.9 | 9.8 | 9.8 | 9.7 |
| Sunrise (AM) | 6:15 | 6:17 | 6:18 | 6:20 | 6:21 | 6:23 | 6:24 | 6:26 | 6:27 | 6:29 | 6:30 | 6:32 | 6:33 | 6:35 | 6:36 | 6:38 | 6:39 | 6:41 | 6:43 | 6:44 | 6:46 | 6:47 | 6:49 | 6:50 | 6:52 | 6:54 | 6:55 | 6:57 | 6:58 | 7:00 | 7:01 |
| Sunset (PM) | 5:42 | 5:39 | 5:37 | 5:35 | 5:33 | 5:31 | 5:29 | 5:27 | 5:25 | 5:23 | 5:21 | 5:19 | 5:17 | 5:15 | 5:13 | 5:11 | 5:09 | 5:07 | 5:05 | 5:03 | 5:01 | 5:00 | 4:58 | 4:56 | 4:54 | 4:53 | 4:51 | 4:49 | 4:48 | 4:46 | 4:44 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.4 | 6:15 | 5:42 |
| 2 | 11.4 | 6:17 | 5:39 |
| 3 | 11.3 | 6:18 | 5:37 |
| 4 | 11.3 | 6:20 | 5:35 |
| 5 | 11.2 | 6:21 | 5:33 |
| 6 | 11.1 | 6:23 | 5:31 |
| 7 | 11.1 | 6:24 | 5:29 |
| 8 | 11.0 | 6:26 | 5:27 |
| 9 | 11.0 | 6:27 | 5:25 |
| 10 | 10.9 | 6:29 | 5:23 |
| 11 | 10.8 | 6:30 | 5:21 |
| 12 | 10.8 | 6:32 | 5:19 |
| 13 | 10.7 | 6:33 | 5:17 |
| 14 | 10.7 | 6:35 | 5:15 |
| 15 | 10.6 | 6:36 | 5:13 |
| 16 | 10.5 | 6:38 | 5:11 |
| 17 | 10.5 | 6:39 | 5:09 |
| 18 | 10.4 | 6:41 | 5:07 |
| 19 | 10.4 | 6:43 | 5:05 |
| 20 | 10.3 | 6:44 | 5:03 |
| 21 | 10.3 | 6:46 | 5:01 |
| 22 | 10.2 | 6:47 | 5:00 |
| 23 | 10.2 | 6:49 | 4:58 |
| 24 | 10.1 | 6:50 | 4:56 |
| 25 | 10.0 | 6:52 | 4:54 |
| 26 | 10.0 | 6:54 | 4:53 |
| 27 | 9.9 | 6:55 | 4:51 |
| 28 | 9.9 | 6:57 | 4:49 |
| 29 | 9.8 | 6:58 | 4:48 |
| 30 | 9.8 | 7:00 | 4:46 |
| 31 | 9.7 | 7:01 | 4:44 |
Solar energy in October
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.
| 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) | 3.1 | 3.0 | 3.0 | 2.9 | 2.9 | 2.8 | 2.7 | 2.6 | 2.6 | 2.5 | 2.5 | 2.4 | 2.3 | 2.3 | 2.2 | 2.2 | 2.1 | 2.1 | 2.0 | 2.0 | 1.9 | 1.9 | 1.9 | 1.8 | 1.8 | 1.8 | 1.7 | 1.7 | 1.7 | 1.6 | 1.6 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.1 | Moderate |
| 2 | 3.0 | Moderate |
| 3 | 3.0 | Moderate |
| 4 | 2.9 | Moderate |
| 5 | 2.9 | Moderate |
| 6 | 2.8 | Moderate |
| 7 | 2.7 | Moderate |
| 8 | 2.6 | Moderate |
| 9 | 2.6 | Moderate |
| 10 | 2.5 | Moderate |
| 11 | 2.5 | Moderate |
| 12 | 2.4 | Moderate |
| 13 | 2.3 | Moderate |
| 14 | 2.3 | Moderate |
| 15 | 2.2 | Moderate |
| 16 | 2.2 | Moderate |
| 17 | 2.1 | Moderate |
| 18 | 2.1 | Moderate |
| 19 | 2.0 | Moderate |
| 20 | 2.0 | Dim |
| 21 | 1.9 | Dim |
| 22 | 1.9 | Dim |
| 23 | 1.9 | Dim |
| 24 | 1.8 | Dim |
| 25 | 1.8 | Dim |
| 26 | 1.8 | Dim |
| 27 | 1.7 | Dim |
| 28 | 1.7 | Dim |
| 29 | 1.7 | Dim |
| 30 | 1.6 | Dim |
| 31 | 1.6 | Dim |
Hazard calendar for Mount Vernon
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.
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).
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.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 46 | 46 | 47 | 48 | 50 | 52 | 53 | 54 | 53 | 50 | 49 | 47 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 46 | Bracing |
| Feb | 46 | Bracing |
| Mar | 47 | Bracing |
| Apr | 48 | Bracing |
| May | 50 | Bracing |
| Jun | 52 | Bracing |
| Jul | 53 | Bracing |
| Aug | 54 | Bracing |
| Sep | 53 | Bracing |
| Oct | 50 | Bracing |
| Nov | 49 | Bracing |
| Dec | 47 | Bracing |
UV index in Mount Vernon in October
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 4 | 5 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Mount Vernon in October
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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 9 | 12 | 12 | 12 | 11 | 11 | 18 | 18 | 12 | 7 | 6 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 9 | Good |
| Mar | 12 | Good |
| Apr | 12 | Good |
| May | 12 | Good |
| Jun | 11 | Good |
| Jul | 11 | Good |
| Aug | 18 | Moderate |
| Sep | 18 | Moderate |
| Oct | 12 | Good |
| Nov | 7 | Good |
| Dec | 6 | Good |
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.
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 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).