Mount Vernon weather in August
In August, Mount Vernon sees average daytime highs of 71°F and overnight lows near 56°F, with 1.8 in of rain across 5.7 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Highs ease over the month, from about 72°F in the first days to 69°F by the end. The sky is clear or mostly clear about 47% of the time in August, and the air most often feels dry.
Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Mount Vernon's 2nd-clearest and 11th-windiest month. For the whole year in context, see Mount Vernon's year-round climate.
- Daytime high
- 71°
- 1st warmest
- Overnight low
- 56°
- 12th coldest
- Rainfall
- 1.8 in
- 5.7 wet days
- Daylight
- 14 h 12 min
- 5:09 AM – 7:18 PM
- Cloud cover
- 46%
- 2nd clearest
- Wind
- 3 mph
- 11th windiest
- Solar energy
- 5.44 kWh/m²
- Travel score
- 7.5
- 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 August
Highs ease over the month, from about 72°F in the first days to 69°F by the end.
A typical August day in Mount Vernon reaches about 71°F in the afternoon and slips back to 56°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 79°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.
| 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) | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 69 | 69 | 69 |
| Avg low (°F) | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 54 | 54 | 54 | 54 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 72 | 56 |
| 2 | 72 | 56 |
| 3 | 72 | 56 |
| 4 | 72 | 56 |
| 5 | 72 | 56 |
| 6 | 72 | 56 |
| 7 | 72 | 56 |
| 8 | 72 | 56 |
| 9 | 71 | 56 |
| 10 | 71 | 56 |
| 11 | 71 | 56 |
| 12 | 71 | 56 |
| 13 | 71 | 56 |
| 14 | 71 | 56 |
| 15 | 71 | 56 |
| 16 | 71 | 56 |
| 17 | 71 | 56 |
| 18 | 71 | 56 |
| 19 | 71 | 56 |
| 20 | 70 | 55 |
| 21 | 70 | 55 |
| 22 | 70 | 55 |
| 23 | 70 | 55 |
| 24 | 70 | 55 |
| 25 | 69 | 55 |
| 26 | 69 | 55 |
| 27 | 69 | 55 |
| 28 | 69 | 54 |
| 29 | 69 | 54 |
| 30 | 69 | 54 |
| 31 | 69 | 54 |
How August really feels in Mount Vernon
Once humidity and wind are folded in, August 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.
August 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 August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-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 August
The sky is clear or mostly clear about 47% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 36%. 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 (%) | 71 | 71 | 69 | 69 | 69 | 67 | 67 | 67 | 65 | 65 | 64 | 64 | 64 | 64 | 64 | 64 | 63 | 63 | 63 | 62 | 62 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 59 | 59 | 59 |
| Cloudier (%) | 29 | 29 | 31 | 31 | 31 | 33 | 33 | 33 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 41 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 71 | 29 |
| 2 | 71 | 29 |
| 3 | 69 | 31 |
| 4 | 69 | 31 |
| 5 | 69 | 31 |
| 6 | 67 | 33 |
| 7 | 67 | 33 |
| 8 | 67 | 33 |
| 9 | 65 | 35 |
| 10 | 65 | 35 |
| 11 | 64 | 36 |
| 12 | 64 | 36 |
| 13 | 64 | 36 |
| 14 | 64 | 36 |
| 15 | 64 | 36 |
| 16 | 64 | 36 |
| 17 | 63 | 37 |
| 18 | 63 | 37 |
| 19 | 63 | 37 |
| 20 | 62 | 38 |
| 21 | 62 | 38 |
| 22 | 61 | 39 |
| 23 | 61 | 39 |
| 24 | 60 | 40 |
| 25 | 60 | 40 |
| 26 | 60 | 40 |
| 27 | 60 | 40 |
| 28 | 60 | 40 |
| 29 | 59 | 41 |
| 30 | 59 | 41 |
| 31 | 59 | 41 |
Chance of precipitation in August
Mount Vernon gets around 1.8 in of rain over 5.7 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 18% and peaks near 27% on the wettest days. 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 (%) | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 25 | 26 | 27 |
| Rain chance (%) | |
|---|---|
| 1 | 13 |
| 2 | 14 |
| 3 | 14 |
| 4 | 14 |
| 5 | 14 |
| 6 | 14 |
| 7 | 15 |
| 8 | 15 |
| 9 | 15 |
| 10 | 15 |
| 11 | 16 |
| 12 | 16 |
| 13 | 16 |
| 14 | 16 |
| 15 | 16 |
| 16 | 16 |
| 17 | 16 |
| 18 | 17 |
| 19 | 17 |
| 20 | 18 |
| 21 | 19 |
| 22 | 19 |
| 23 | 20 |
| 24 | 21 |
| 25 | 22 |
| 26 | 23 |
| 27 | 24 |
| 28 | 25 |
| 29 | 25 |
| 30 | 26 |
| 31 | 27 |
Humidity in August
Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the dry band about 56% 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 (%) | 52 | 52 | 51 | 51 | 50 | 49 | 48 | 47 | 47 | 46 | 46 | 47 | 47 | 48 | 49 | 51 | 53 | 54 | 57 | 58 | 60 | 61 | 64 | 65 | 66 | 68 | 69 | 70 | 71 | 73 | 73 |
| Comfortable (%) | 42 | 42 | 43 | 44 | 46 | 46 | 47 | 48 | 49 | 49 | 49 | 48 | 48 | 47 | 46 | 45 | 43 | 42 | 40 | 39 | 37 | 36 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 27 |
| Humid (%) | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 |
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 1 | 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 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 52 | 42 | 5 | 1 |
| 2 | 52 | 42 | 5 | 1 |
| 3 | 51 | 43 | 5 | 1 |
| 4 | 51 | 44 | 4 | 1 |
| 5 | 50 | 46 | 4 | 1 |
| 6 | 49 | 46 | 4 | 1 |
| 7 | 48 | 47 | 4 | 0 |
| 8 | 47 | 48 | 4 | 0 |
| 9 | 47 | 49 | 4 | 0 |
| 10 | 46 | 49 | 4 | 0 |
| 11 | 46 | 49 | 4 | 0 |
| 12 | 47 | 48 | 4 | 0 |
| 13 | 47 | 48 | 4 | 0 |
| 14 | 48 | 47 | 4 | 0 |
| 15 | 49 | 46 | 4 | 0 |
| 16 | 51 | 45 | 4 | 0 |
| 17 | 53 | 43 | 4 | 0 |
| 18 | 54 | 42 | 4 | 0 |
| 19 | 57 | 40 | 3 | 0 |
| 20 | 58 | 39 | 3 | 0 |
| 21 | 60 | 37 | 3 | 0 |
| 22 | 61 | 36 | 3 | 0 |
| 23 | 64 | 34 | 2 | 0 |
| 24 | 65 | 33 | 2 | 0 |
| 25 | 66 | 32 | 2 | 0 |
| 26 | 68 | 31 | 1 | 0 |
| 27 | 69 | 30 | 1 | 0 |
| 28 | 70 | 29 | 1 | 0 |
| 29 | 71 | 28 | 1 | 0 |
| 30 | 73 | 27 | 0 | 0 |
| 31 | 73 | 27 | 0 | 0 |
Wind in August
Winds average 3 mph in August.
Across August, daily wind ranges from about 3 mph on the calmest days to 3 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) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 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 | 3 | calm |
| 2 | 3 | calm |
| 3 | 3 | calm |
| 4 | 3 | calm |
| 5 | 3 | calm |
| 6 | 3 | calm |
| 7 | 3 | calm |
| 8 | 3 | calm |
| 9 | 3 | calm |
| 10 | 3 | calm |
| 11 | 3 | calm |
| 12 | 3 | calm |
| 13 | 3 | calm |
| 14 | 3 | calm |
| 15 | 3 | calm |
| 16 | 3 | calm |
| 17 | 3 | calm |
| 18 | 3 | calm |
| 19 | 3 | calm |
| 20 | 3 | calm |
| 21 | 3 | calm |
| 22 | 3 | calm |
| 23 | 3 | calm |
| 24 | 3 | calm |
| 25 | 3 | calm |
| 26 | 3 | calm |
| 27 | 3 | calm |
| 28 | 3 | calm |
| 29 | 3 | calm |
| 30 | 3 | calm |
| 31 | 3 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 54 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 96 minutes over August. Sunrise moves from 4:48 AM to 5:30 AM, and sunset from 7:43 PM to 6:49 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) | 14.9 | 14.9 | 14.8 | 14.8 | 14.7 | 14.7 | 14.6 | 14.6 | 14.5 | 14.5 | 14.4 | 14.4 | 14.3 | 14.3 | 14.2 | 14.2 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 |
| Sunrise (AM) | 4:48 | 4:50 | 4:51 | 4:52 | 4:54 | 4:55 | 4:56 | 4:58 | 4:59 | 5:00 | 5:02 | 5:03 | 5:05 | 5:06 | 5:07 | 5:09 | 5:10 | 5:12 | 5:13 | 5:15 | 5:16 | 5:17 | 5:19 | 5:20 | 5:22 | 5:23 | 5:25 | 5:26 | 5:27 | 5:29 | 5:30 |
| Sunset (PM) | 7:43 | 7:41 | 7:40 | 7:38 | 7:37 | 7:35 | 7:33 | 7:32 | 7:30 | 7:29 | 7:27 | 7:25 | 7:23 | 7:22 | 7:20 | 7:18 | 7:16 | 7:14 | 7:12 | 7:11 | 7:09 | 7:07 | 7:05 | 7:03 | 7:01 | 6:59 | 6:57 | 6:55 | 6:53 | 6:51 | 6:49 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.9 | 4:48 | 7:43 |
| 2 | 14.9 | 4:50 | 7:41 |
| 3 | 14.8 | 4:51 | 7:40 |
| 4 | 14.8 | 4:52 | 7:38 |
| 5 | 14.7 | 4:54 | 7:37 |
| 6 | 14.7 | 4:55 | 7:35 |
| 7 | 14.6 | 4:56 | 7:33 |
| 8 | 14.6 | 4:58 | 7:32 |
| 9 | 14.5 | 4:59 | 7:30 |
| 10 | 14.5 | 5:00 | 7:29 |
| 11 | 14.4 | 5:02 | 7:27 |
| 12 | 14.4 | 5:03 | 7:25 |
| 13 | 14.3 | 5:05 | 7:23 |
| 14 | 14.3 | 5:06 | 7:22 |
| 15 | 14.2 | 5:07 | 7:20 |
| 16 | 14.2 | 5:09 | 7:18 |
| 17 | 14.1 | 5:10 | 7:16 |
| 18 | 14.0 | 5:12 | 7:14 |
| 19 | 14.0 | 5:13 | 7:12 |
| 20 | 13.9 | 5:15 | 7:11 |
| 21 | 13.9 | 5:16 | 7:09 |
| 22 | 13.8 | 5:17 | 7:07 |
| 23 | 13.8 | 5:19 | 7:05 |
| 24 | 13.7 | 5:20 | 7:03 |
| 25 | 13.7 | 5:22 | 7:01 |
| 26 | 13.6 | 5:23 | 6:59 |
| 27 | 13.5 | 5:25 | 6:57 |
| 28 | 13.5 | 5:26 | 6:55 |
| 29 | 13.4 | 5:27 | 6:53 |
| 30 | 13.4 | 5:29 | 6:51 |
| 31 | 13.3 | 5:30 | 6:49 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.44 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 — August's 5.44 kWh/m² sits near the top of that range.
| 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) | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 |
| Level | Intense | Intense | Intense | Intense | Intense | 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 | 6.2 | Intense |
| 2 | 6.1 | Intense |
| 3 | 6.1 | Intense |
| 4 | 6.0 | Intense |
| 5 | 6.0 | Intense |
| 6 | 6.0 | Bright |
| 7 | 5.9 | Bright |
| 8 | 5.9 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.7 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.6 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.5 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.1 | Bright |
| 24 | 5.1 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.8 | Bright |
Hazard calendar for Mount Vernon
None of Mount Vernon's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Mount Vernon's rainy season runs October–April, when most of the year's rain falls.
Is August a good time to visit Mount Vernon?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit Mount Vernon for general sightseeing.
What to pack for Mount Vernon in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Mount Vernon sees daytime highs around 71°F and nights near 56°F. Worth packing: sun protection. About 6 days see rain.
Sea temperature near Mount Vernon in August
The nearest coast averages about 54°F in August — 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 August
Clear-sky midday UV in August 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 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 August
Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).