Monthly outlook for Lake Cassidy, WA: average high 56.3°, average low 42.1°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 9 days and 4.4 inches. The warmest day looks like 21 October (63.1°), the coolest 24 October (36°).
56.3°/42.1°
Average high / low
+1.4°
Above normal
4 / 9
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
58.5°
54.6°
+2.2°
31 October – 9 November
52.7°
51.7°
+0.6°
10 November – 19 November
at normal
48.9°
—
October records over 66 years
84.2°1 October 1987All-time high
25.9°29 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Marysville (3 mi).
Thu, 2259° / 40°0
59 °
Lake Cassidy, Thursday, 22 October
Overcast. High 59°, low 40°.
Pressure29.97 inHg
Wind3.9 mph NW
Humidity73%
Visibility6.2 mi
Dew point46°
Fri, 2356° / 37°0
56 °
Lake Cassidy, Friday, 23 October
Clear. High 56°, low 37°.
Pressure30.33 inHg
Wind2.2 mph NW
Humidity66%
Visibility6.2 mi
Dew point42°
Sat, 2452° / 36°0
52 °
Lake Cassidy, Saturday, 24 October
Overcast. High 52°, low 36°.
Pressure30.18 inHg
Wind1.1 mph W
Humidity69%
Visibility3.2 mi
Dew point41°
Sun, 2559° / 42°0
59 °
Lake Cassidy, Sunday, 25 October
Overcast. High 59°, low 42°.
Pressure30.09 inHg
Wind2.8 mph W
Humidity64%
Visibility6.2 mi
Dew point44°
Mon, 2660° / 38°0
60 °
Lake Cassidy, Monday, 26 October
Overcast. High 60°, low 38°.
Pressure30.12 inHg
Wind4.8 mph W
Humidity59%
Visibility—
Dew point38°
Tue, 2761° / 43°0
61 °
Lake Cassidy, Tuesday, 27 October
Overcast. High 61°, low 43°.
Pressure30.12 inHg
Wind4.4 mph NW
Humidity58%
Visibility—
Dew point39°
Wed, 2862° / 45°0
62 °
Lake Cassidy, Wednesday, 28 October
Overcast. High 62°, low 45°.
Pressure30.09 inHg
Wind3.7 mph W
Humidity46%
Visibility—
Dew point34°
Thu, 2961° / 44°0
61 °
Lake Cassidy, Thursday, 29 October
Overcast. High 61°, low 44°.
Pressure30.03 inHg
Wind2.2 mph SW
Humidity42%
Visibility—
Dew point32°
Fri, 3052° / 47°0.08
52 °
Lake Cassidy, Friday, 30 October
Light rain. High 52°, low 47°.
Pressure29.94 inHg
Wind2.7 mph S
Humidity77%
Visibility—
Dew point44°
Sat, 3151° / 41°0.02
51 °
Lake Cassidy, Saturday, 31 October
Light rain. High 51°, low 41°.
Pressure30.03 inHg
Wind6.5 mph S
Humidity78%
Visibility—
Dew point41°
Sun, 0155° / 42°0
55 °
Lake Cassidy, Sunday, 1 November
Light rain. High 55°, low 42°.
Pressure30.00 inHg
Wind9.5 mph S
Humidity58%
Visibility—
Dew point35°
Mon, 0259° / 47°0
59 °
Lake Cassidy, Monday, 2 November
Overcast. High 59°, low 47°.
Pressure30.15 inHg
Wind4.2 mph SE
Humidity67%
Visibility—
Dew point42°
Tue, 0353° / 48°0.09
53 °
Lake Cassidy, Tuesday, 3 November
Light rain. High 53°, low 48°.
Pressure30.03 inHg
Wind7.7 mph SE
Humidity60%
Visibility—
Dew point39°
Wed, 0452° / 42°0.58
52 °
Lake Cassidy, Wednesday, 4 November
Rain. High 52°, low 42°.
Pressure29.68 inHg
Wind8.8 mph SE
Humidity89%
Visibility—
Dew point46°
Thu, 0547° / 41°0.4
47 °
Lake Cassidy, Thursday, 5 November
Rain. High 47°, low 41°.
Pressure29.80 inHg
Wind10.2 mph S
Humidity85%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0651° / 41°0.33
51 °
Lake Cassidy, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.33 in
Chance of precipitation65%
Record high59° (1979)
Record low26° (2003)
Sat, 0751° / 42°0.33
51 °
Lake Cassidy, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.33 in
Chance of precipitation72%
Record high60° (2016)
Record low30° (2003)
Sun, 0851° / 41°0.28
51 °
Lake Cassidy, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.28 in
Chance of precipitation58%
Record high67° (2016)
Record low30° (1977)
Mon, 0950° / 40°0.27
50 °
Lake Cassidy, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.27 in
Chance of precipitation63%
Record high61° (2025)
Record low28° (1978)
Tue, 1051° / 40°0.25
51 °
Lake Cassidy, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.25 in
Chance of precipitation48%
Record high64° (2016)
Record low27° (1986)
Wed, 1150° / 40°0.29
50 °
Lake Cassidy, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.29 in
Chance of precipitation60%
Record high61° (1996)
Record low25° (1985)
Thu, 1250° / 40°0.35
50 °
Lake Cassidy, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.35 in
Chance of precipitation67%
Record high58° (1976)
Record low26° (1978)
Fri, 1350° / 40°0.36
50 °
Lake Cassidy, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.36 in
Chance of precipitation65%
Record high63° (1967)
Record low25° (1978)
Sat, 1450° / 40°0.31
50 °
Lake Cassidy, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.31 in
Chance of precipitation58%
Record high62° (1999)
Record low26° (1978)
Sun, 1549° / 39°0.34
49 °
Lake Cassidy, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.34 in
Chance of precipitation70%
Record high57° (2008)
Record low29° (1978)
Mon, 1648° / 39°0.33
48 °
Lake Cassidy, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.33 in
Chance of precipitation75%
Record high61° (1965)
Record low27° (2023)
Tue, 1748° / 38°0.31
48 °
Lake Cassidy, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.31 in
Chance of precipitation68%
Record high59° (2008)
Record low26° (2021)
Wed, 1847° / 38°0.26
47 °
Lake Cassidy, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.26 in
Chance of precipitation62%
Record high58° (1965)
Record low21° (1985)
Thu, 1947° / 38°0.38
47 °
Lake Cassidy, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.38 in
Chance of precipitation73%
Record high59° (1987)
Record low23° (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 Lake Cassidy, 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 Lake Cassidy, 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.