Portland weather in August
In August, Portland sees average daytime highs of 89°F and overnight lows near 78°F, with 2.3 in of rain across 9.7 wet days and about 13 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.
Day-to-day highs hold fairly steady near 89°F through the month. The sky is clear or mostly clear about 49% of the time in August, and the air most often feels miserable.
Daylight stretches from about 13 h 18 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Portland's 4th-clearest and 11th-windiest month. For the whole year in context, see Portland's year-round climate.
- Daytime high
- 89°
- 1st warmest
- Overnight low
- 78°
- 12th coldest
- Rainfall
- 2.3 in
- 9.7 wet days
- Daylight
- 13 hours
- 6:03 AM – 7:03 PM
- Cloud cover
- 46%
- 4th clearest
- Wind
- 10 mph
- 11th windiest
- Solar energy
- 6.19 kWh/m²
- Travel score
- 4.2
- out of 10
Portland is city in Texas, United States.
- Density
- 580/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 89°F through the month.
A typical August day in Portland reaches about 89°F in the afternoon and slips back to 78°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 86°F and 92°F. Set against its neighbours, August runs on par with July and about 3°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) | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 |
| Avg low (°F) | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 77 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 90 | 78 |
| 2 | 90 | 78 |
| 3 | 90 | 78 |
| 4 | 90 | 78 |
| 5 | 90 | 78 |
| 6 | 90 | 78 |
| 7 | 90 | 78 |
| 8 | 90 | 78 |
| 9 | 90 | 78 |
| 10 | 90 | 78 |
| 11 | 90 | 78 |
| 12 | 90 | 78 |
| 13 | 90 | 78 |
| 14 | 90 | 78 |
| 15 | 90 | 78 |
| 16 | 90 | 78 |
| 17 | 90 | 78 |
| 18 | 90 | 78 |
| 19 | 90 | 78 |
| 20 | 89 | 78 |
| 21 | 89 | 78 |
| 22 | 89 | 78 |
| 23 | 89 | 78 |
| 24 | 89 | 78 |
| 25 | 89 | 78 |
| 26 | 89 | 78 |
| 27 | 89 | 78 |
| 28 | 89 | 78 |
| 29 | 89 | 78 |
| 30 | 89 | 78 |
| 31 | 89 | 77 |
How August really feels in Portland
Once humidity and wind are folded in, August averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Portland weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 65° / 51° | 2.1 | 6.5 | 10.4 | 6.5 |
| Feb | 68° / 54° | 1.5 | 5.2 | 11 | 6.9 |
| Mar | 73° / 60° | 2.2 | 6.2 | 11.8 | 7.4 |
| Apr | 78° / 66° | 2.0 | 6.4 | 12.6 | 7.4 |
| May | 83° / 73° | 2.7 | 8.8 | 13.4 | 6.1 |
| Jun | 87° / 77° | 2.9 | 10.2 | 13.7 | 4.8 |
| Jul | 89° / 78° | 2.2 | 8.6 | 13.6 | 4.5 |
| Aug | 89° / 78° | 2.3 | 9.7 | 13 | 4.2 |
| Sep | 87° / 75° | 4.3 | 13.8 | 12.2 | 4.5 |
| Oct | 81° / 67° | 3.4 | 8.8 | 11.3 | 6.8 |
| Nov | 73° / 59° | 2.2 | 6.8 | 10.6 | 7.4 |
| Dec | 67° / 52° | 2.1 | 6.3 | 10.3 | 6.7 |
Cloud cover in August
The sky is clear or mostly clear about 49% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 33%. 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 | 72 | 72 | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 70 | 71 | 70 | 69 | 69 | 68 | 67 | 66 | 66 | 65 | 64 | 63 | 63 | 61 | 61 | 60 | 59 | 58 | 58 | 57 |
| Cloudier (%) | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 31 | 31 | 32 | 33 | 34 | 34 | 35 | 36 | 37 | 37 | 39 | 39 | 40 | 41 | 42 | 42 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 71 | 29 |
| 2 | 72 | 28 |
| 3 | 72 | 28 |
| 4 | 72 | 28 |
| 5 | 72 | 28 |
| 6 | 72 | 28 |
| 7 | 72 | 28 |
| 8 | 71 | 29 |
| 9 | 71 | 29 |
| 10 | 71 | 29 |
| 11 | 71 | 29 |
| 12 | 70 | 30 |
| 13 | 71 | 29 |
| 14 | 70 | 30 |
| 15 | 69 | 31 |
| 16 | 69 | 31 |
| 17 | 68 | 32 |
| 18 | 67 | 33 |
| 19 | 66 | 34 |
| 20 | 66 | 34 |
| 21 | 65 | 35 |
| 22 | 64 | 36 |
| 23 | 63 | 37 |
| 24 | 63 | 37 |
| 25 | 61 | 39 |
| 26 | 61 | 39 |
| 27 | 60 | 40 |
| 28 | 59 | 41 |
| 29 | 58 | 42 |
| 30 | 58 | 42 |
| 31 | 57 | 43 |
Chance of precipitation in August
Portland gets around 2.3 in of rain over 9.7 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 32% and peaks near 49% 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 (%) | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 24 | 25 | 26 | 27 | 28 | 30 | 31 | 33 | 34 | 36 | 37 | 39 | 40 | 42 | 43 | 44 | 45 | 47 | 48 | 49 | 49 |
| Rain chance (%) | |
|---|---|
| 1 | 24 |
| 2 | 23 |
| 3 | 23 |
| 4 | 23 |
| 5 | 22 |
| 6 | 22 |
| 7 | 22 |
| 8 | 22 |
| 9 | 23 |
| 10 | 23 |
| 11 | 24 |
| 12 | 25 |
| 13 | 26 |
| 14 | 27 |
| 15 | 28 |
| 16 | 30 |
| 17 | 31 |
| 18 | 33 |
| 19 | 34 |
| 20 | 36 |
| 21 | 37 |
| 22 | 39 |
| 23 | 40 |
| 24 | 42 |
| 25 | 43 |
| 26 | 44 |
| 27 | 45 |
| 28 | 47 |
| 29 | 48 |
| 30 | 49 |
| 31 | 49 |
Humidity in August
Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the miserable band about 80% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 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 | 0 | 0 | 0 | 0 | 0 | 1 |
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 |
| Oppressive (%) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 17 | 18 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 27 | 28 | 29 |
| Miserable (%) | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 84 | 84 | 84 | 83 | 83 | 81 | 80 | 80 | 79 | 78 | 77 | 76 | 75 | 73 | 72 | 71 | 70 | 70 | 68 | 66 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 0 | 1 | 14 | 85 |
| 2 | 0 | 1 | 14 | 85 |
| 3 | 0 | 1 | 14 | 85 |
| 4 | 0 | 1 | 14 | 85 |
| 5 | 0 | 1 | 14 | 85 |
| 6 | 0 | 1 | 14 | 85 |
| 7 | 0 | 1 | 14 | 85 |
| 8 | 0 | 1 | 14 | 85 |
| 9 | 0 | 1 | 14 | 85 |
| 10 | 0 | 1 | 14 | 85 |
| 11 | 0 | 1 | 14 | 85 |
| 12 | 0 | 1 | 15 | 84 |
| 13 | 0 | 1 | 15 | 84 |
| 14 | 0 | 1 | 15 | 84 |
| 15 | 0 | 1 | 16 | 83 |
| 16 | 0 | 1 | 16 | 83 |
| 17 | 0 | 2 | 17 | 81 |
| 18 | 0 | 2 | 18 | 80 |
| 19 | 0 | 2 | 18 | 80 |
| 20 | 0 | 2 | 19 | 79 |
| 21 | 0 | 2 | 20 | 78 |
| 22 | 0 | 2 | 21 | 77 |
| 23 | 0 | 2 | 22 | 76 |
| 24 | 0 | 2 | 23 | 75 |
| 25 | 0 | 3 | 24 | 73 |
| 26 | 0 | 3 | 25 | 72 |
| 27 | 0 | 3 | 26 | 71 |
| 28 | 0 | 3 | 27 | 70 |
| 29 | 0 | 3 | 27 | 70 |
| 30 | 0 | 4 | 28 | 68 |
| 31 | 1 | 4 | 29 | 66 |
Wind in August
Winds average 10 mph in August.
Across August, daily wind ranges from about 9 mph on the calmest days to 10 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 10 | light breeze |
| 2 | 10 | light breeze |
| 3 | 10 | light breeze |
| 4 | 10 | light breeze |
| 5 | 10 | light breeze |
| 6 | 10 | light breeze |
| 7 | 10 | light breeze |
| 8 | 10 | light breeze |
| 9 | 10 | light breeze |
| 10 | 10 | light breeze |
| 11 | 10 | light breeze |
| 12 | 10 | light breeze |
| 13 | 10 | light breeze |
| 14 | 10 | light breeze |
| 15 | 10 | light breeze |
| 16 | 10 | light breeze |
| 17 | 10 | light breeze |
| 18 | 10 | light breeze |
| 19 | 10 | light breeze |
| 20 | 10 | light breeze |
| 21 | 10 | light breeze |
| 22 | 10 | light breeze |
| 23 | 9 | light breeze |
| 24 | 9 | light breeze |
| 25 | 9 | light breeze |
| 26 | 9 | light breeze |
| 27 | 9 | light breeze |
| 28 | 9 | light breeze |
| 29 | 9 | light breeze |
| 30 | 9 | light breeze |
| 31 | 9 | light breeze |
Sunrise & sunset in August
Daylight runs from about 13 h 18 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 42 minutes over August. Sunrise moves from 5:55 AM to 6:11 AM, and sunset from 7:15 PM to 6:48 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) | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 |
| Sunrise (AM) | 5:55 | 5:56 | 5:56 | 5:57 | 5:57 | 5:58 | 5:59 | 5:59 | 6:00 | 6:00 | 6:01 | 6:01 | 6:02 | 6:02 | 6:03 | 6:03 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:09 | 6:09 | 6:10 | 6:10 | 6:11 | 6:11 |
| Sunset (PM) | 7:15 | 7:15 | 7:14 | 7:13 | 7:13 | 7:12 | 7:11 | 7:10 | 7:10 | 7:09 | 7:08 | 7:07 | 7:06 | 7:05 | 7:04 | 7:03 | 7:02 | 7:01 | 7:00 | 6:59 | 6:58 | 6:57 | 6:56 | 6:55 | 6:54 | 6:53 | 6:52 | 6:51 | 6:50 | 6:49 | 6:48 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.3 | 5:55 | 7:15 |
| 2 | 13.3 | 5:56 | 7:15 |
| 3 | 13.3 | 5:56 | 7:14 |
| 4 | 13.3 | 5:57 | 7:13 |
| 5 | 13.3 | 5:57 | 7:13 |
| 6 | 13.2 | 5:58 | 7:12 |
| 7 | 13.2 | 5:59 | 7:11 |
| 8 | 13.2 | 5:59 | 7:10 |
| 9 | 13.2 | 6:00 | 7:10 |
| 10 | 13.1 | 6:00 | 7:09 |
| 11 | 13.1 | 6:01 | 7:08 |
| 12 | 13.1 | 6:01 | 7:07 |
| 13 | 13.1 | 6:02 | 7:06 |
| 14 | 13.0 | 6:02 | 7:05 |
| 15 | 13.0 | 6:03 | 7:04 |
| 16 | 13.0 | 6:03 | 7:03 |
| 17 | 13.0 | 6:04 | 7:02 |
| 18 | 13.0 | 6:04 | 7:01 |
| 19 | 12.9 | 6:05 | 7:00 |
| 20 | 12.9 | 6:05 | 6:59 |
| 21 | 12.9 | 6:06 | 6:58 |
| 22 | 12.8 | 6:07 | 6:57 |
| 23 | 12.8 | 6:07 | 6:56 |
| 24 | 12.8 | 6:08 | 6:55 |
| 25 | 12.8 | 6:08 | 6:54 |
| 26 | 12.7 | 6:09 | 6:53 |
| 27 | 12.7 | 6:09 | 6:52 |
| 28 | 12.7 | 6:10 | 6:51 |
| 29 | 12.7 | 6:10 | 6:50 |
| 30 | 12.6 | 6:11 | 6:49 |
| 31 | 12.6 | 6:11 | 6:48 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.19 kWh/m².
For context, solar energy here swings from a low near 2.76 kWh/m² to a high of 6.6 kWh/m² in July across the year — August's 6.19 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) | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.5 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.4 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.1 | Intense |
| 20 | 6.0 | Intense |
| 21 | 6.0 | Intense |
| 22 | 6.0 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.8 | Bright |
| 26 | 5.8 | Bright |
| 27 | 5.7 | Bright |
| 28 | 5.7 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Portland
In August, Portland sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Portland sits in the Atlantic hurricane belt; the season peaks August–October.
Is August a good time to visit Portland?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Portland for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Portland in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Portland sees daytime highs around 89°F and nights near 78°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.
Sea temperature near Portland in August
The nearest coast averages about 84°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 21 mi away) is warmest in September at about 84°F and coldest in February near 64°F.
It's comfortable for a long swim from Mar 29 to Dec 20 — about 8.8 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 65 | 64 | 66 | 71 | 77 | 82 | 83 | 84 | 84 | 80 | 73 | 69 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Refreshing | Refreshing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 65 | Cool |
| Feb | 64 | Cool |
| Mar | 66 | Cool |
| Apr | 71 | Refreshing |
| May | 77 | Warm |
| Jun | 82 | Tropical |
| Jul | 83 | Tropical |
| Aug | 84 | Tropical |
| Sep | 84 | Tropical |
| Oct | 80 | Warm |
| Nov | 73 | Refreshing |
| Dec | 69 | Refreshing |
UV index in Portland in August
Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Portland peaks around June 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 6 | 7 | 10 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
| Level | Moderate | High | High | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 6 | High |
| Mar | 7 | High |
| Apr | 10 | Very high |
| May | 11 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | High |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in Portland 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 Portland is worst in July — around 20 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 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) | 8 | 9 | 12 | 12 | 16 | 17 | 20 | 13 | 11 | 6 | 6 | 7 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 12 | Good |
| Apr | 12 | Good |
| May | 16 | Moderate |
| Jun | 17 | Moderate |
| Jul | 20 | Moderate |
| Aug | 13 | Moderate |
| Sep | 11 | Good |
| Oct | 6 | Good |
| Nov | 6 | Good |
| Dec | 7 | Good |
Where is Portland?
Portland sits at 27.9°N, 97.3°W, 43 ft above sea level, in United States. The nearest listed city is Corpus Christi, 6.8 mi away.
Topography around Portland
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Portland.
Within 2 miles, the terrain around Portland has only modest variations in elevation — a maximum elevation change of 56 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 115 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 394 ft.
The land around Portland is covered by water (47%) and artificial surfaces (25%) within 2 miles, water (38%) and cropland (33%) within 10 miles, and water (33%), grassland (23%) and cropland (20%) 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 Portland (27.8773°, -97.3239°, elevation 43 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).