Monthly outlook for Grotto, WA: average high 59.1°, average low 40.8°. That is 1.8° above the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 9 days and 5.0 inches. The warmest day looks like 16 October (72.6°), the coolest 18 October (29.4°).
59.1°/40.8°
Average high / low
+1.8°
Above normal
2 / 9
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
60.3°
57.7°
+1.4°
26 October – 4 November
57.2°
52.3°
+2.7°
5 November – 14 November
at normal
48.8°
—
October records over 66 years
88.2°1 October 1987All-time high
2.1°28 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Skykomish (3 mi).
Sat, 1763° / 49°0.44
63 °
Grotto, Saturday, 17 October
Rain. High 63°, low 49°.
Pressure30.27 inHg
Wind6 mph NW
Humidity78%
Visibility6.2 mi
Dew point42°
Sun, 1854° / 29°0
54 °
Grotto, Sunday, 18 October
Overcast. High 54°, low 29°.
Pressure30.12 inHg
Wind2.4 mph W
Humidity49%
Visibility6.2 mi
Dew point33°
Mon, 1955° / 33°0
55 °
Grotto, Monday, 19 October
Overcast. High 55°, low 33°.
Pressure29.85 inHg
Wind1.3 mph W
Humidity43%
Visibility6.2 mi
Dew point27°
Tue, 2062° / 33°0
62 °
Grotto, Tuesday, 20 October
Clear. High 62°, low 33°.
Pressure30.03 inHg
Wind3 mph NW
Humidity48%
Visibility—
Dew point33°
Wed, 2167° / 35°0
67 °
Grotto, Wednesday, 21 October
Mostly clear. High 67°, low 35°.
Pressure29.97 inHg
Wind3.3 mph NW
Humidity46%
Visibility—
Dew point36°
Thu, 2259° / 44°0
59 °
Grotto, Thursday, 22 October
Overcast. High 59°, low 44°.
Pressure29.88 inHg
Wind4.9 mph W
Humidity52%
Visibility—
Dew point39°
Fri, 2348° / 41°0
48 °
Grotto, Friday, 23 October
Overcast. High 48°, low 41°.
Pressure30.15 inHg
Wind3.2 mph W
Humidity85%
Visibility—
Dew point43°
Sat, 2465° / 40°0
65 °
Grotto, Saturday, 24 October
Clear. High 65°, low 40°.
Pressure30.15 inHg
Wind6.4 mph E
Humidity50%
Visibility—
Dew point37°
Sun, 2557° / 42°0
57 °
Grotto, Sunday, 25 October
Overcast. High 57°, low 42°.
Pressure30.09 inHg
Wind6.1 mph E
Humidity54%
Visibility—
Dew point36°
Mon, 2659° / 41°0
59 °
Grotto, Monday, 26 October
Clear. High 59°, low 41°.
Pressure30.06 inHg
Wind4.8 mph W
Humidity57%
Visibility—
Dew point39°
Tue, 2759° / 43°0
59 °
Grotto, Tuesday, 27 October
Light rain. High 59°, low 43°.
Pressure29.83 inHg
Wind4.1 mph E
Humidity49%
Visibility—
Dew point35°
Wed, 2849° / 48°0.49
49 °
Grotto, Wednesday, 28 October
Light rain. High 49°, low 48°.
Pressure29.88 inHg
Wind3.1 mph SE
Humidity99%
Visibility—
Dew point49°
Thu, 2951° / 43°0.02
51 °
Grotto, Thursday, 29 October
Light rain. High 51°, low 43°.
Pressure30.21 inHg
Wind4.2 mph E
Humidity86%
Visibility—
Dew point46°
Fri, 3064° / 42°0
64 °
Grotto, Friday, 30 October
Clear. High 64°, low 42°.
Pressure30.12 inHg
Wind7.4 mph E
Humidity59%
Visibility—
Dew point40°
Sat, 3161° / 44°0
61 °
Grotto, Saturday, 31 October
Overcast. High 61°, low 44°.
Pressure29.91 inHg
Wind7.6 mph E
Humidity54%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0152° / 39°0.39
52 °
Grotto, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.39 in
Chance of precipitation60%
Record high69° (1962)
Record low26° (1995)
Mon, 0252° / 39°0.31
52 °
Grotto, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.31 in
Chance of precipitation58%
Record high72° (2020)
Record low15° (1973)
Tue, 0351° / 39°0.35
51 °
Grotto, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.35 in
Chance of precipitation60%
Record high68° (1962)
Record low12° (1973)
Wed, 0452° / 40°0.52
52 °
Grotto, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.52 in
Chance of precipitation63%
Record high67° (1976)
Record low24° (1968)
Thu, 0551° / 39°0.33
51 °
Grotto, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.33 in
Chance of precipitation65%
Record high64° (1980)
Record low11° (1971)
Fri, 0649° / 39°0.44
49 °
Grotto, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.44 in
Chance of precipitation65%
Record high65° (2012)
Record low24° (1971)
Sat, 0749° / 39°0.44
49 °
Grotto, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.44 in
Chance of precipitation70%
Record high62° (2019)
Record low17° (2017)
Sun, 0850° / 38°0.32
50 °
Grotto, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.32 in
Chance of precipitation58%
Record high67° (2016)
Record low22° (2022)
Mon, 0949° / 38°0.34
49 °
Grotto, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.34 in
Chance of precipitation72%
Record high65° (2025)
Record low14° (1982)
Tue, 1048° / 37°0.31
48 °
Grotto, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.31 in
Chance of precipitation58%
Record high64° (2016)
Record low13° (1986)
Wed, 1149° / 37°0.38
49 °
Grotto, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.38 in
Chance of precipitation65%
Record high64° (2016)
Record low7° (1985)
Thu, 1248° / 37°0.44
48 °
Grotto, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.44 in
Chance of precipitation68%
Record high59° (1990)
Record low9° (1985)
Fri, 1348° / 37°0.47
48 °
Grotto, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.47 in
Chance of precipitation67%
Record high63° (2018)
Record low12° (1978)
Sat, 1447° / 37°0.41
47 °
Grotto, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.41 in
Chance of precipitation62%
Record high65° (1969)
Record low11° (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 Grotto, 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 Grotto, 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.