Monthly outlook for Roche Harbor, WA: average high 54.5°, average low 47.5°. That is 1.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 7 days and 2.6 inches. The warmest day looks like 16 October (65.2°), the coolest 18 October (41.9°).
54.5°/47.5°
Average high / low
+1.1°
Above normal
2 / 7
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
55.8°
53.3°
+1.4°
26 October – 4 November
52.4°
51.2°
+0.7°
5 November – 14 November
at normal
49.6°
—
October records over 66 years
73.2°16 October 2022All-time high
28.8°31 October 1984All-time low
Sat, 1761° / 47°0.08
61 °
Roche Harbor, Saturday, 17 October
Rain. High 61°, low 47°.
Pressure30.21 inHg
Wind9.9 mph SW
Humidity79%
Visibility6.2 mi
Dew point50°
Sun, 1854° / 42°0
54 °
Roche Harbor, Sunday, 18 October
Overcast. High 54°, low 42°.
Pressure30.21 inHg
Wind7 mph N
Humidity92%
Visibility4.6 mi
Dew point48°
Mon, 1954° / 52°0
54 °
Roche Harbor, Monday, 19 October
Clear. High 54°, low 52°.
Pressure29.94 inHg
Wind2 mph SW
Humidity77%
Visibility—
Dew point46°
Tue, 2057° / 53°0
57 °
Roche Harbor, Tuesday, 20 October
Clear. High 57°, low 53°.
Pressure30.12 inHg
Wind15.4 mph N
Humidity82%
Visibility6.2 mi
Dew point49°
Wed, 2156° / 48°0
56 °
Roche Harbor, Wednesday, 21 October
Overcast. High 56°, low 48°.
Pressure30.06 inHg
Wind8.3 mph N
Humidity94%
Visibility—
Dew point49°
Thu, 2254° / 49°0.06
54 °
Roche Harbor, Thursday, 22 October
Light rain. High 54°, low 49°.
Pressure30.00 inHg
Wind12.3 mph NW
Humidity78%
Visibility—
Dew point46°
Fri, 2352° / 47°0
52 °
Roche Harbor, Friday, 23 October
Clear. High 52°, low 47°.
Pressure30.33 inHg
Wind12.7 mph NW
Humidity71%
Visibility—
Dew point41°
Sat, 2452° / 45°0
52 °
Roche Harbor, Saturday, 24 October
Clear. High 52°, low 45°.
Pressure30.27 inHg
Wind8 mph NE
Humidity50%
Visibility—
Dew point30°
Sun, 2553° / 46°0
53 °
Roche Harbor, Sunday, 25 October
Clear. High 53°, low 46°.
Pressure30.09 inHg
Wind9.7 mph N
Humidity63%
Visibility—
Dew point38°
Mon, 2652° / 46°0
52 °
Roche Harbor, Monday, 26 October
Partly cloudy. High 52°, low 46°.
Pressure30.24 inHg
Wind6.2 mph N
Humidity65%
Visibility—
Dew point38°
Tue, 2753° / 47°0
53 °
Roche Harbor, Tuesday, 27 October
Clear. High 53°, low 47°.
Pressure30.12 inHg
Wind12.3 mph NW
Humidity75%
Visibility—
Dew point43°
Wed, 2853° / 48°0
53 °
Roche Harbor, Wednesday, 28 October
Clear. High 53°, low 48°.
Pressure29.94 inHg
Wind13.2 mph N
Humidity77%
Visibility—
Dew point44°
Thu, 2953° / 47°0
53 °
Roche Harbor, Thursday, 29 October
Clear. High 53°, low 47°.
Pressure29.94 inHg
Wind8 mph N
Humidity70%
Visibility—
Dew point42°
Fri, 3052° / 47°0
52 °
Roche Harbor, Friday, 30 October
Clear. High 52°, low 47°.
Pressure30.21 inHg
Wind4.9 mph N
Humidity75%
Visibility—
Dew point42°
Sat, 3152° / 47°0
52 °
Roche Harbor, Saturday, 31 October
Clear. High 52°, low 47°.
Pressure30.24 inHg
Wind5.2 mph N
Humidity75%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0151° / 46°0.19
51 °
Roche Harbor, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low46°
Average precipitation0.19 in
Chance of precipitation47%
Record high58° (1969)
Record low36° (1984)
Mon, 0251° / 46°0.18
51 °
Roche Harbor, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low46°
Average precipitation0.18 in
Chance of precipitation53%
Record high58° (1970)
Record low37° (2002)
Tue, 0351° / 46°0.24
51 °
Roche Harbor, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low46°
Average precipitation0.24 in
Chance of precipitation55%
Record high57° (1970)
Record low33° (2017)
Wed, 0451° / 46°0.2
51 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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 °
Roche 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)
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 Roche 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 Roche 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.