Monthly outlook for Vashon, WA: average high 60.4°, average low 45.2°. That is 1° above the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 7 days and 2.6 inches. The warmest day looks like 8 October (72.6°), the coolest 12 October (40.4°).
60.4°/45.2°
Average high / low
+1°
Above normal
4 / 7
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
60.7°
59.4°
+0.7°
18 October – 27 October
59.8°
56.2°
+2°
28 October – 6 November
at normal
52.8°
—
October records over 66 years
85.1°1 October 1987All-time high
24.1°28 October 1971All-time low
Climate normals and records are computed from the nearest reference point — White Center (9 mi).
Fri, 0961° / 48°0.09
61 °
Vashon, Friday, 9 October
Rain. High 61°, low 48°.
Pressure29.83 inHg
Wind9.3 mph E
Humidity87%
Visibility6.2 mi
Dew point53°
Sat, 1057° / 44°0.02
57 °
Vashon, Saturday, 10 October
Light rain. High 57°, low 44°.
Pressure29.88 inHg
Wind4.7 mph N
Humidity73%
Visibility6.2 mi
Dew point46°
Sun, 1160° / 47°0
60 °
Vashon, Sunday, 11 October
Clear. High 60°, low 47°.
Pressure30.09 inHg
Wind10.4 mph N
Humidity48%
Visibility6.2 mi
Dew point39°
Mon, 1261° / 40°0
61 °
Vashon, Monday, 12 October
Mostly clear. High 61°, low 40°.
Pressure30.15 inHg
Wind5.7 mph N
Humidity68%
Visibility—
Dew point43°
Tue, 1353° / 44°0.17
53 °
Vashon, Tuesday, 13 October
Light rain. High 53°, low 44°.
Pressure30.00 inHg
Wind9.1 mph S
Humidity75%
Visibility—
Dew point44°
Wed, 1457° / 45°0
57 °
Vashon, Wednesday, 14 October
Overcast. High 57°, low 45°.
Pressure30.06 inHg
Wind5.4 mph N
Humidity68%
Visibility—
Dew point42°
Thu, 1560° / 42°0
60 °
Vashon, Thursday, 15 October
Clear. High 60°, low 42°.
Pressure30.39 inHg
Wind5.7 mph N
Humidity67%
Visibility—
Dew point41°
Fri, 1662° / 42°0
62 °
Vashon, Friday, 16 October
Clear. High 62°, low 42°.
Pressure30.30 inHg
Wind4.2 mph NE
Humidity44%
Visibility—
Dew point32°
Sat, 1764° / 44°0
64 °
Vashon, Saturday, 17 October
Partly cloudy. High 64°, low 44°.
Pressure30.30 inHg
Wind3.8 mph N
Humidity51%
Visibility—
Dew point36°
Sun, 1862° / 45°0
62 °
Vashon, Sunday, 18 October
Partly cloudy. High 62°, low 45°.
Pressure30.21 inHg
Wind6.2 mph N
Humidity62%
Visibility—
Dew point43°
Mon, 1965° / 45°0
65 °
Vashon, Monday, 19 October
Clear. High 65°, low 45°.
Pressure30.24 inHg
Wind4.8 mph N
Humidity60%
Visibility—
Dew point42°
Tue, 2065° / 50°0
65 °
Vashon, Tuesday, 20 October
Overcast. High 65°, low 50°.
Pressure30.15 inHg
Wind11.7 mph SW
Humidity57%
Visibility—
Dew point42°
Wed, 2162° / 48°0.14
62 °
Vashon, Wednesday, 21 October
Light rain. High 62°, low 48°.
Pressure30.12 inHg
Wind13.4 mph SW
Humidity65%
Visibility—
Dew point45°
Thu, 2256° / 42°0
56 °
Vashon, Thursday, 22 October
Overcast. High 56°, low 42°.
Pressure30.24 inHg
Wind6.7 mph NE
Humidity75%
Visibility—
Dew point42°
Fri, 2348° / 45°0.06
48 °
Vashon, Friday, 23 October
Light rain. High 48°, low 45°.
Pressure29.94 inHg
Wind6 mph S
Humidity84%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2456° / 44°0.2
56 °
Vashon, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.2 in
Chance of precipitation52%
Record high69° (1965)
Record low35° (1983)
Sun, 2555° / 44°0.21
55 °
Vashon, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.21 in
Chance of precipitation57%
Record high67° (1965)
Record low33° (2020)
Mon, 2654° / 44°0.25
54 °
Vashon, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.25 in
Chance of precipitation53%
Record high68° (1965)
Record low32° (1970)
Tue, 2754° / 43°0.21
54 °
Vashon, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.21 in
Chance of precipitation48%
Record high65° (1962)
Record low30° (1970)
Wed, 2854° / 42°0.24
54 °
Vashon, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.24 in
Chance of precipitation55%
Record high67° (1962)
Record low24° (1971)
Thu, 2953° / 42°0.17
53 °
Vashon, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.17 in
Chance of precipitation53%
Record high68° (1962)
Record low28° (1971)
Fri, 3053° / 42°0.2
53 °
Vashon, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.2 in
Chance of precipitation53%
Record high62° (1987)
Record low28° (1991)
Sat, 3153° / 42°0.26
53 °
Vashon, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.26 in
Chance of precipitation65%
Record high64° (1964)
Record low27° (2002)
Sun, 0153° / 42°0.23
53 °
Vashon, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.23 in
Chance of precipitation50%
Record high65° (1969)
Record low27° (2002)
Mon, 0253° / 42°0.19
53 °
Vashon, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.19 in
Chance of precipitation57%
Record high66° (1962)
Record low28° (1973)
Tue, 0353° / 42°0.26
53 °
Vashon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.26 in
Chance of precipitation60%
Record high64° (2010)
Record low28° (1973)
Wed, 0453° / 42°0.31
53 °
Vashon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.31 in
Chance of precipitation58%
Record high66° (1980)
Record low28° (2003)
Thu, 0552° / 42°0.19
52 °
Vashon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.19 in
Chance of precipitation55%
Record high64° (1997)
Record low25° (2003)
Fri, 0651° / 42°0.28
51 °
Vashon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.28 in
Chance of precipitation62%
Record high58° (1967)
Record low25° (2003)
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 Vashon, 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 Vashon, 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.