Monthly outlook for Copalis Beach, WA: average high 57.3°, average low 49.8°. That is 1.1° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 8 days and 5.9 inches. The warmest day looks like 15 October (65.7°), the coolest 12 October (35.7°).
57.3°/49.8°
Average high / low
+1.1°
Above normal
3 / 8
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
57.1°
56°
+0.6°
21 October – 30 October
57.8°
53.6°
+2.3°
31 October – 9 November
at normal
51.6°
—
October records over 66 years
76.3°15 October 2022All-time high
26.8°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Santiago (13 mi).
Mon, 1255° / 36°0
55 °
Copalis Beach, Monday, 12 October
Clear. High 55°, low 36°.
Pressure30.06 inHg
Wind1.9 mph SW
Humidity72%
Visibility6.2 mi
Dew point44°
Tue, 1355° / 46°0
55 °
Copalis Beach, Tuesday, 13 October
Overcast. High 55°, low 46°.
Pressure30.18 inHg
Wind3 mph S
Humidity85%
Visibility4.0 mi
Dew point49°
Wed, 1457° / 52°0.01
57 °
Copalis Beach, Wednesday, 14 October
Light rain. High 57°, low 52°.
Pressure30.27 inHg
Wind3.7 mph S
Humidity88%
Visibility6.2 mi
Dew point53°
Thu, 1566° / 50°0
66 °
Copalis Beach, Thursday, 15 October
Clear. High 66°, low 50°.
Pressure30.24 inHg
Wind11 mph E
Humidity64%
Visibility—
Dew point51°
Fri, 1660° / 56°0
60 °
Copalis Beach, Friday, 16 October
Overcast. High 60°, low 56°.
Pressure30.09 inHg
Wind11.8 mph SE
Humidity91%
Visibility—
Dew point55°
Sat, 1757° / 54°0.08
57 °
Copalis Beach, Saturday, 17 October
Light rain. High 57°, low 54°.
Pressure30.12 inHg
Wind11.6 mph SW
Humidity91%
Visibility—
Dew point54°
Sun, 1856° / 55°0.01
56 °
Copalis Beach, Sunday, 18 October
Light rain. High 56°, low 55°.
Pressure30.09 inHg
Wind13.4 mph S
Humidity89%
Visibility—
Dew point53°
Mon, 1955° / 52°0.35
55 °
Copalis Beach, Monday, 19 October
Rain. High 55°, low 52°.
Pressure30.21 inHg
Wind18.1 mph W
Humidity80%
Visibility—
Dew point49°
Tue, 2055° / 52°0.2
55 °
Copalis Beach, Tuesday, 20 October
Light rain. High 55°, low 52°.
Pressure30.15 inHg
Wind14.6 mph SW
Humidity86%
Visibility—
Dew point50°
Wed, 2157° / 48°0
57 °
Copalis Beach, Wednesday, 21 October
Overcast. High 57°, low 48°.
Pressure29.91 inHg
Wind18.1 mph E
Humidity66%
Visibility—
Dew point44°
Thu, 2254° / 52°0.02
54 °
Copalis Beach, Thursday, 22 October
Light rain. High 54°, low 52°.
Pressure30.00 inHg
Wind11.6 mph E
Humidity78%
Visibility—
Dew point47°
Fri, 2358° / 52°0
58 °
Copalis Beach, Friday, 23 October
Overcast. High 58°, low 52°.
Pressure30.27 inHg
Wind9.2 mph E
Humidity70%
Visibility—
Dew point47°
Sat, 2458° / 51°0
58 °
Copalis Beach, Saturday, 24 October
Overcast. High 58°, low 51°.
Pressure30.24 inHg
Wind12.8 mph E
Humidity67%
Visibility—
Dew point46°
Sun, 2563° / 52°0
63 °
Copalis Beach, Sunday, 25 October
Clear. High 63°, low 52°.
Pressure30.00 inHg
Wind17.5 mph E
Humidity55%
Visibility—
Dew point45°
Mon, 2657° / 52°0
57 °
Copalis Beach, Monday, 26 October
Clear. High 57°, low 52°.
Pressure29.97 inHg
Wind10.8 mph E
Humidity65%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2753° / 45°0.35
53 °
Copalis Beach, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.35 in
Chance of precipitation58%
Record high68° (2017)
Record low31° (2023)
Wed, 2852° / 45°0.51
52 °
Copalis Beach, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.51 in
Chance of precipitation65%
Record high65° (1962)
Record low29° (2023)
Thu, 2953° / 45°0.33
53 °
Copalis Beach, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.33 in
Chance of precipitation57%
Record high65° (1962)
Record low29° (2023)
Fri, 3053° / 44°0.48
53 °
Copalis Beach, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.48 in
Chance of precipitation62%
Record high61° (2017)
Record low27° (2019)
Sat, 3153° / 44°0.48
53 °
Copalis Beach, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.48 in
Chance of precipitation63%
Record high63° (1966)
Record low30° (2019)
Sun, 0153° / 44°0.43
53 °
Copalis Beach, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.43 in
Chance of precipitation53%
Record high64° (1969)
Record low30° (2019)
Mon, 0252° / 44°0.42
52 °
Copalis Beach, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.42 in
Chance of precipitation65%
Record high65° (1970)
Record low33° (2019)
Tue, 0352° / 45°0.56
52 °
Copalis Beach, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.56 in
Chance of precipitation62%
Record high66° (2010)
Record low35° (1994)
Wed, 0452° / 45°0.59
52 °
Copalis Beach, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.59 in
Chance of precipitation68%
Record high60° (1980)
Record low33° (1973)
Thu, 0551° / 44°0.44
51 °
Copalis Beach, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.44 in
Chance of precipitation72%
Record high60° (1960)
Record low30° (1973)
Fri, 0651° / 44°0.61
51 °
Copalis Beach, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.61 in
Chance of precipitation72%
Record high62° (1976)
Record low34° (1973)
Sat, 0751° / 44°0.55
51 °
Copalis Beach, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.55 in
Chance of precipitation70%
Record high59° (2019)
Record low35° (2019)
Sun, 0851° / 44°0.45
51 °
Copalis Beach, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.45 in
Chance of precipitation67%
Record high61° (2016)
Record low35° (2018)
Mon, 0950° / 43°0.58
50 °
Copalis Beach, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.58 in
Chance of precipitation68%
Record high61° (2025)
Record low29° (2022)
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 Copalis Beach, 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 Copalis Beach, 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.