Monthly outlook for Boston Harbor, WA: average high 54.6°, average low 43.4°. That is 0.5° above the climate normal for October. Precipitation is expected on 9 days (about 3.4 inches), against a normal of 9 days and 3.8 inches. The warmest day looks like 9 November (60.9°), the coolest 1 November (36.4°).
54.6°/43.4°
Average high / low
+0.5°
Above normal
9 / 9
Wet days / normal
3.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
27 October – 5 November
52.7°
54.5°
-1°
6 November – 15 November
57.7°
52°
+3.2°
16 November – 25 November
at normal
48.2°
—
October records over 66 years
87.4°1 October 1987All-time high
29.5°28 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Olympia (7 mi).
Wed, 2852° / 43°0.26
52 °
Boston Harbor, Wednesday, 28 October
Rain. High 52°, low 43°.
Pressure29.97 inHg
Wind8.9 mph SW
Humidity71%
Visibility6.2 mi
Dew point43°
Thu, 2949° / 42°0.36
49 °
Boston Harbor, Thursday, 29 October
Light rain. High 49°, low 42°.
Pressure30.00 inHg
Wind2.1 mph SE
Humidity87%
Visibility6.2 mi
Dew point43°
Fri, 3052° / 38°0.21
52 °
Boston Harbor, Friday, 30 October
Light rain. High 52°, low 38°.
Pressure29.97 inHg
Wind1.8 mph SE
Humidity83%
Visibility6.2 mi
Dew point43°
Sat, 3153° / 39°0
53 °
Boston Harbor, Saturday, 31 October
Overcast. High 53°, low 39°.
Pressure29.97 inHg
Wind1.4 mph NE
Humidity84%
Visibility6.2 mi
Dew point41°
Sun, 0155° / 36°0
55 °
Boston Harbor, Sunday, 1 November
Overcast. High 55°, low 36°.
Pressure30.24 inHg
Wind3.3 mph W
Humidity93%
Visibility—
Dew point40°
Mon, 0254° / 37°0
54 °
Boston Harbor, Monday, 2 November
Overcast. High 54°, low 37°.
Pressure30.27 inHg
Wind7.6 mph NE
Humidity77%
Visibility—
Dew point39°
Tue, 0357° / 41°0
57 °
Boston Harbor, Tuesday, 3 November
Overcast. High 57°, low 41°.
Pressure30.00 inHg
Wind3.6 mph NE
Humidity58%
Visibility—
Dew point35°
Wed, 0452° / 42°0.26
52 °
Boston Harbor, Wednesday, 4 November
Rain. High 52°, low 42°.
Pressure29.85 inHg
Wind2.9 mph N
Humidity65%
Visibility—
Dew point37°
Thu, 0549° / 44°0.49
49 °
Boston Harbor, Thursday, 5 November
Rain. High 49°, low 44°.
Pressure29.85 inHg
Wind5.3 mph NE
Humidity89%
Visibility—
Dew point45°
Fri, 0658° / 50°0.94
58 °
Boston Harbor, Friday, 6 November
Rain. High 58°, low 50°.
Pressure29.53 inHg
Wind9.6 mph SW
Humidity94%
Visibility—
Dew point54°
Sat, 0756° / 48°0.56
56 °
Boston Harbor, Saturday, 7 November
Rain. High 56°, low 48°.
Pressure29.59 inHg
Wind8.9 mph SW
Humidity87%
Visibility—
Dew point50°
Sun, 0860° / 48°0.01
60 °
Boston Harbor, Sunday, 8 November
Light rain. High 60°, low 48°.
Pressure30.12 inHg
Wind5.7 mph SW
Humidity83%
Visibility—
Dew point49°
Mon, 0961° / 45°0
61 °
Boston Harbor, Monday, 9 November
Overcast. High 61°, low 45°.
Pressure30.15 inHg
Wind2.5 mph S
Humidity71%
Visibility—
Dew point44°
Tue, 1057° / 48°0.06
57 °
Boston Harbor, Tuesday, 10 November
Light rain. High 57°, low 48°.
Pressure30.06 inHg
Wind4.1 mph SW
Humidity85%
Visibility—
Dew point47°
Wed, 1155° / 45°0.02
55 °
Boston Harbor, Wednesday, 11 November
Light rain. High 55°, low 45°.
Pressure30.18 inHg
Wind3.4 mph E
Humidity94%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 1252° / 42°0.3
52 °
Boston Harbor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.3 in
Chance of precipitation65%
Record high61° (1990)
Record low29° (1985)
Fri, 1352° / 42°0.33
52 °
Boston Harbor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.33 in
Chance of precipitation65%
Record high60° (1969)
Record low29° (1985)
Sat, 1451° / 42°0.3
51 °
Boston Harbor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.3 in
Chance of precipitation52%
Record high64° (1995)
Record low29° (1964)
Sun, 1551° / 41°0.27
51 °
Boston Harbor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.27 in
Chance of precipitation62%
Record high61° (2001)
Record low28° (1978)
Mon, 1649° / 41°0.25
49 °
Boston Harbor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.25 in
Chance of precipitation65%
Record high61° (1965)
Record low31° (2014)
Tue, 1750° / 41°0.28
50 °
Boston Harbor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.28 in
Chance of precipitation67%
Record high63° (1995)
Record low27° (1961)
Wed, 1849° / 40°0.19
49 °
Boston Harbor, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.19 in
Chance of precipitation53%
Record high57° (1968)
Record low26° (1985)
Thu, 1949° / 40°0.37
49 °
Boston Harbor, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.37 in
Chance of precipitation67%
Record high62° (1968)
Record low27° (2022)
Fri, 2049° / 40°0.26
49 °
Boston Harbor, Friday, 20 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.26 in
Chance of precipitation57%
Record high60° (2002)
Record low27° (1977)
Sat, 2148° / 38°0.29
48 °
Boston Harbor, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.29 in
Chance of precipitation55%
Record high59° (2002)
Record low23° (1978)
Sun, 2247° / 38°0.27
47 °
Boston Harbor, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.27 in
Chance of precipitation60%
Record high63° (2017)
Record low19° (1985)
Mon, 2347° / 38°0.35
47 °
Boston Harbor, Monday, 23 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.35 in
Chance of precipitation72%
Record high60° (2017)
Record low13° (1985)
Tue, 2447° / 39°0.36
47 °
Boston Harbor, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high47°
Average low39°
Average precipitation0.36 in
Chance of precipitation62%
Record high56° (1995)
Record low16° (2010)
Wed, 2547° / 38°0.34
47 °
Boston Harbor, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.34 in
Chance of precipitation65%
Record high57° (1977)
Record low14° (1985)
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 Boston 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 Boston 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.