Friday Harbor, WA weather in August
Friday Harbor is mild in August, with some rain: highs average 73°F and nights drop to about 50°F. Expect about 7 wet days. This is the peak of the warm season in Friday Harbor. A great month for outdoor plans.
- Normal high
- 73°F
- Normal low
- 50°F
- Wet days
- 7
- 0.7 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 74°F | 72°F |
| Normal low | 51°F | 49°F |
| Chance of a wet day | 20% | 30% |
| Sunrise / sunset | 5:46 am / 8:50 pm | 6:28 am / 7:56 pm |
| Daylight | 15.1 h | 13.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical August day
- 6 am57°Fdew point 53°F
- 9 am63°Fdew point 55°F
- Noon68°Fdew point 56°F
- 3 pm71°Fdew point 55°F
- 6 pm69°Fdew point 55°F
- 9 pm62°Fdew point 55°F
NOAA hourly normals (local standard time) from Bellingham Intl Airport (28 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F26 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph4 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 0.7 in; a dry August brings about 0.2 in and a wet one about 1.1 in (25th and 75th percentiles). Days with half an inch or more are rare.
How August varies from year to year
- Warmest August, 1991-20202016: average high 76°F
- Coolest August2000: average high 69°F
- Wettest August2004: 3.5 in
- Driest August2012: no measurable precipitation
- Highest reading93°F (August 19, 2016)
- Lowest reading42°F (August 31, 2012)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 72°F | 73°F | 68°F |
| Normal low | 50°F | 50°F | 48°F |
| Wet days | 5 | 7 | 12 |
| Comfortable days | 25 | 26 | 20 |
| Daylight | 15.7 h | 14.3 h | 12.6 h |
Highs change by +1°F from July and -5°F into September.
Nearby alternatives in August
- Warmer: Leavenworth, WA127 mi · high 87°F · 2 wet days
- Drier: Tacoma, WA92 mi · high 77°F · 4 wet days
How Friday Harbor ranks in August
- Normal high361st warmest of 378 cities; 8th of 9 in Washington
- Wet days145th driest of 378
- Comfortable days5th most of 341
Heating and cooling
August has 116 heating degree days and 12 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Friday Harbor in August?
The normal high is 73°F and the normal low is 50°F. From 1991 to 2020 the hottest August reading was 93°F (August 19, 2016).
Does it rain a lot in Friday Harbor in August?
About 7 days in August have at least 0.01 in of precipitation, and the normal total is 0.7 in. The wettest August in 1991-2020 was in 2004 (3.5 in); the driest was in 2012, with no measurable precipitation.
Is August a good time to visit Friday Harbor?
August ranks 2nd of 12 months on our comfort score for Friday Harbor (90 out of 100). It has about 26 comfortable days. The best months are July and August.
Where the numbers come from
- Temperature, rain and frost dates: Friday Harbor Airport (USW00094276), 0.9 mi SSW of the city center, 109 ft (51 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Olga 2 Se (USC00456096), 11 mi ENE of the city center, 80 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Bellingham Intl Airport (USW00024217), 28 mi NE of the city center, 149 ft (91 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Bellingham Intl Airport (727976-24217), 28 mi NE of the city center, 151 ft (93 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).