Friday Harbor climate

Friday Harbor Weather in August

NOAA 1991-2020 normals for Friday Harbor AP, 1.4 km from Friday Harbor

Average highs run from 74°F on August 1 to 72°F on August 31, and lows from 51°F to 49°F. Normal precipitation for the month is 0.70 in over about 8 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Friday Harbor, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
73°F
Average low
50°F
Precipitation
0.70 in
Record high
93°FAug 12, 2021
Record low
42°FAug 12, 2000
Chance of a freeze
0%
Daylight
15 h 02 min to 13 h 27 min
Cloud cover
49%
Humidity
74%
Dew point
54°F
Wind
5.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 174°F51°F84°F 201544°F 201119%0%
Aug 274°F51°F87°F 201743°F 199920%0%
Aug 374°F51°F88°F 201743°F 200820%0%
Aug 474°F51°F86°F 201243°F 200820%0%
Aug 574°F50°F84°F 201246°F 199821%0%
Aug 674°F50°F84°F 202244°F 201321%0%
Aug 774°F50°F84°F 202246°F 200121%0%
Aug 874°F50°F88°F 201845°F 200022%0%
Aug 974°F50°F88°F 200447°F 199822%0%
Aug 1074°F50°F86°F 202546°F 199922%0%
Aug 1174°F50°F88°F 202544°F 200723%0%
Aug 1274°F50°F93°F 202142°F 200023%0%
Aug 1374°F50°F92°F 202343°F 200023%0%
Aug 1474°F50°F92°F 202344°F 200024%0%
Aug 1574°F50°F92°F 201044°F 200024%0%
Aug 1674°F50°F90°F 202342°F 200025%0%
Aug 1774°F50°F87°F 202243°F 200025%0%
Aug 1873°F50°F87°F 201644°F 200626%0%
Aug 1973°F50°F93°F 201645°F 201126%0%
Aug 2073°F50°F84°F 201644°F 200127%0%
Aug 2173°F50°F86°F 201844°F 200227%0%
Aug 2273°F50°F82°F 202543°F 200228%0%
Aug 2373°F50°F86°F 202542°F 200328%0%
Aug 2473°F50°F87°F 201642°F 200329%0%
Aug 2573°F50°F91°F 201645°F 201729%0%
Aug 2673°F50°F86°F 201644°F 200829%0%
Aug 2773°F50°F83°F 200943°F 200030%0%
Aug 2872°F49°F85°F 201742°F 200030%0%
Aug 2972°F49°F80°F 200742°F 201031%0%
Aug 3072°F49°F86°F 202243°F 200331%0%
Aug 3172°F49°F83°F 202442°F 201232%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Friday Harbor, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

August 1
sunrise 5:47 AM, sunset 8:49 PM
August 31
sunrise 6:28 AM, sunset 7:55 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094276 (Friday Harbor AP), public domain. Records: NOAA GHCN-Daily, station USW00094276, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.