Monthly outlook for Friday Harbor, WA: average high 53.9°, average low 47.3°. That is 1.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 8 days and 2.7 inches. The warmest day looks like 20 October (58.5°), the coolest 19 October (44.5°).
53.9°/47.3°
Average high / low
+1.1°
Above normal
2 / 8
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
54.1°
52.6°
+0.9°
29 October – 7 November
53.5°
50.8°
+1.5°
8 November – 17 November
at normal
49°
—
October records over 66 years
73.2°16 October 2022All-time high
28.8°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Roche Harbor (6 mi).
Tue, 2058° / 45°0
58 °
Friday Harbor, Tuesday, 20 October
Clear. High 58°, low 45°.
Pressure30.09 inHg
Wind13.6 mph N
Humidity78%
Visibility2.7 mi
Dew point48°
Wed, 2155° / 45°0
55 °
Friday Harbor, Wednesday, 21 October
Partly cloudy. High 55°, low 45°.
Pressure29.97 inHg
Wind2.1 mph NW
Humidity81%
Visibility5.2 mi
Dew point49°
Thu, 2254° / 47°0.01
54 °
Friday Harbor, Thursday, 22 October
Light rain. High 54°, low 47°.
Pressure29.94 inHg
Wind2.6 mph S
Humidity81%
Visibility6.2 mi
Dew point48°
Fri, 2352° / 48°0
52 °
Friday Harbor, Friday, 23 October
Overcast. High 52°, low 48°.
Pressure30.27 inHg
Wind1.9 mph W
Humidity74%
Visibility1.6 mi
Dew point41°
Sat, 2449° / 47°0.4
49 °
Friday Harbor, Saturday, 24 October
Rain. High 49°, low 47°.
Pressure30.06 inHg
Wind20.8 mph SE
Humidity81%
Visibility—
Dew point42°
Sun, 2553° / 47°0
53 °
Friday Harbor, Sunday, 25 October
Partly cloudy. High 53°, low 47°.
Pressure30.18 inHg
Wind15.5 mph E
Humidity62%
Visibility—
Dew point38°
Mon, 2654° / 47°0
54 °
Friday Harbor, Monday, 26 October
Overcast. High 54°, low 47°.
Pressure30.24 inHg
Wind7.9 mph N
Humidity75%
Visibility—
Dew point44°
Tue, 2755° / 49°0
55 °
Friday Harbor, Tuesday, 27 October
Partly cloudy. High 55°, low 49°.
Pressure30.18 inHg
Wind11.1 mph N
Humidity68%
Visibility—
Dew point42°
Wed, 2854° / 47°0
54 °
Friday Harbor, Wednesday, 28 October
Overcast. High 54°, low 47°.
Pressure30.03 inHg
Wind9.2 mph N
Humidity69%
Visibility—
Dew point41°
Thu, 2954° / 49°0
54 °
Friday Harbor, Thursday, 29 October
Overcast. High 54°, low 49°.
Pressure29.94 inHg
Wind3 mph S
Humidity69%
Visibility—
Dew point42°
Fri, 3053° / 49°0
53 °
Friday Harbor, Friday, 30 October
Overcast. High 53°, low 49°.
Pressure29.97 inHg
Wind5.9 mph N
Humidity69%
Visibility—
Dew point42°
Sat, 3154° / 49°0
54 °
Friday Harbor, Saturday, 31 October
Overcast. High 54°, low 49°.
Pressure30.12 inHg
Wind3.3 mph E
Humidity76%
Visibility—
Dew point45°
Sun, 0154° / 48°0
54 °
Friday Harbor, Sunday, 1 November
Overcast. High 54°, low 48°.
Pressure30.06 inHg
Wind6.5 mph N
Humidity74%
Visibility—
Dew point43°
Mon, 0255° / 48°0.34
55 °
Friday Harbor, Monday, 2 November
Light rain. High 55°, low 48°.
Pressure29.53 inHg
Wind28 mph SE
Humidity93%
Visibility—
Dew point47°
Tue, 0351° / 49°0.01
51 °
Friday Harbor, Tuesday, 3 November
Light rain. High 51°, low 49°.
Pressure29.80 inHg
Wind18.3 mph W
Humidity73%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0451° / 46°0.2
51 °
Friday Harbor, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low46°
Average precipitation0.2 in
Chance of precipitation53%
Record high60° (2023)
Record low35° (2017)
Thu, 0551° / 46°0.13
51 °
Friday Harbor, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low46°
Average precipitation0.13 in
Chance of precipitation55%
Record high58° (2016)
Record low34° (2017)
Fri, 0650° / 46°0.23
50 °
Friday Harbor, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low46°
Average precipitation0.23 in
Chance of precipitation57%
Record high59° (2014)
Record low35° (2017)
Sat, 0750° / 46°0.2
50 °
Friday Harbor, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low46°
Average precipitation0.2 in
Chance of precipitation60%
Record high56° (2016)
Record low34° (2022)
Sun, 0850° / 45°0.15
50 °
Friday Harbor, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low45°
Average precipitation0.15 in
Chance of precipitation45%
Record high60° (2016)
Record low31° (2022)
Mon, 0949° / 45°0.22
49 °
Friday Harbor, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low45°
Average precipitation0.22 in
Chance of precipitation58%
Record high58° (2016)
Record low34° (1986)
Tue, 1049° / 45°0.15
49 °
Friday Harbor, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low45°
Average precipitation0.15 in
Chance of precipitation48%
Record high56° (1981)
Record low34° (1986)
Wed, 1149° / 45°0.21
49 °
Friday Harbor, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low45°
Average precipitation0.21 in
Chance of precipitation55%
Record high56° (1981)
Record low31° (1985)
Thu, 1249° / 45°0.2
49 °
Friday Harbor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high49°
Average low45°
Average precipitation0.2 in
Chance of precipitation62%
Record high57° (2016)
Record low35° (1985)
Fri, 1349° / 45°0.22
49 °
Friday Harbor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low45°
Average precipitation0.22 in
Chance of precipitation58%
Record high57° (1967)
Record low34° (1985)
Sat, 1449° / 44°0.2
49 °
Friday Harbor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low44°
Average precipitation0.2 in
Chance of precipitation50%
Record high55° (1969)
Record low35° (1978)
Sun, 1549° / 44°0.25
49 °
Friday Harbor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low44°
Average precipitation0.25 in
Chance of precipitation63%
Record high58° (2001)
Record low36° (2000)
Mon, 1648° / 44°0.19
48 °
Friday Harbor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low44°
Average precipitation0.19 in
Chance of precipitation50%
Record high55° (1965)
Record low38° (2000)
Tue, 1748° / 43°0.17
48 °
Friday Harbor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high48°
Average low43°
Average precipitation0.17 in
Chance of precipitation57%
Record high57° (1995)
Record low37° (1961)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Friday Harbor, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Friday Harbor, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.