Monthly outlook for Marmac, WA: average high 59.6°, average low 43.1°. That is 0.2° above the climate normal for October. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 7 days and 2.7 inches. The warmest day looks like 16 October (70.4°), the coolest 12 October (37.2°).
59.6°/43.1°
Average high / low
+0.2°
Above normal
4 / 7
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
60.3°
60.3°
-0°
21 October – 30 October
58.4°
56.4°
+1.1°
31 October – 9 November
at normal
53.5°
—
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 (13 mi).
Mon, 1262° / 37°0
62 °
Marmac, Monday, 12 October
Clear. High 62°, low 37°.
Pressure30.06 inHg
Wind1 mph S
Humidity50%
Visibility6.2 mi
Dew point40°
Tue, 1357° / 38°0
57 °
Marmac, Tuesday, 13 October
Overcast. High 57°, low 38°.
Pressure30.21 inHg
Wind3.9 mph SW
Humidity70%
Visibility2.1 mi
Dew point45°
Wed, 1463° / 48°0
63 °
Marmac, Wednesday, 14 October
Overcast. High 63°, low 48°.
Pressure30.30 inHg
Wind5.9 mph W
Humidity78%
Visibility6.2 mi
Dew point53°
Thu, 1569° / 46°0
69 °
Marmac, Thursday, 15 October
Clear. High 69°, low 46°.
Pressure30.30 inHg
Wind4.8 mph E
Humidity71%
Visibility6.2 mi
Dew point52°
Fri, 1670° / 48°0
70 °
Marmac, Friday, 16 October
Overcast. High 70°, low 48°.
Pressure30.12 inHg
Wind12 mph SW
Humidity51%
Visibility—
Dew point44°
Sat, 1760° / 46°0.06
60 °
Marmac, Saturday, 17 October
Light rain. High 60°, low 46°.
Pressure30.15 inHg
Wind9.1 mph SW
Humidity77%
Visibility—
Dew point52°
Sun, 1859° / 44°0
59 °
Marmac, Sunday, 18 October
Overcast. High 59°, low 44°.
Pressure30.18 inHg
Wind4.5 mph SW
Humidity82%
Visibility—
Dew point46°
Mon, 1949° / 44°0.57
49 °
Marmac, Monday, 19 October
Rain. High 49°, low 44°.
Pressure29.88 inHg
Wind8.4 mph S
Humidity95%
Visibility—
Dew point47°
Tue, 2051° / 44°0.62
51 °
Marmac, Tuesday, 20 October
Rain. High 51°, low 44°.
Pressure29.91 inHg
Wind12.3 mph SW
Humidity95%
Visibility—
Dew point48°
Wed, 2149° / 47°0.63
49 °
Marmac, Wednesday, 21 October
Rain. High 49°, low 47°.
Pressure29.77 inHg
Wind9.6 mph SE
Humidity93%
Visibility—
Dew point46°
Thu, 2255° / 43°0
55 °
Marmac, Thursday, 22 October
Overcast. High 55°, low 43°.
Pressure30.27 inHg
Wind2.9 mph E
Humidity88%
Visibility—
Dew point46°
Fri, 2360° / 40°0
60 °
Marmac, Friday, 23 October
Mostly clear. High 60°, low 40°.
Pressure30.53 inHg
Wind5.6 mph NE
Humidity76%
Visibility—
Dew point42°
Sat, 2462° / 40°0
62 °
Marmac, Saturday, 24 October
Partly cloudy. High 62°, low 40°.
Pressure30.42 inHg
Wind5.7 mph NE
Humidity66%
Visibility—
Dew point40°
Sun, 2561° / 41°0
61 °
Marmac, Sunday, 25 October
Overcast. High 61°, low 41°.
Pressure30.30 inHg
Wind3.5 mph E
Humidity60%
Visibility—
Dew point38°
Mon, 2663° / 44°0
63 °
Marmac, Monday, 26 October
Overcast. High 63°, low 44°.
Pressure30.21 inHg
Wind2.3 mph E
Humidity54%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2756° / 44°0.21
56 °
Marmac, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.21 in
Chance of precipitation40%
Record high67° (1968)
Record low30° (2023)
Wed, 2855° / 44°0.24
55 °
Marmac, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.24 in
Chance of precipitation53%
Record high69° (1962)
Record low29° (2023)
Thu, 2955° / 44°0.17
55 °
Marmac, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.17 in
Chance of precipitation48%
Record high69° (1962)
Record low31° (1971)
Fri, 3055° / 44°0.21
55 °
Marmac, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.21 in
Chance of precipitation55%
Record high64° (1987)
Record low29° (2019)
Sat, 3154° / 44°0.3
54 °
Marmac, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.3 in
Chance of precipitation52%
Record high65° (1964)
Record low31° (2002)
Sun, 0155° / 43°0.23
55 °
Marmac, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.23 in
Chance of precipitation50%
Record high66° (1981)
Record low32° (2002)
Mon, 0254° / 43°0.22
54 °
Marmac, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.22 in
Chance of precipitation55%
Record high66° (1962)
Record low34° (2002)
Tue, 0354° / 44°0.25
54 °
Marmac, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.25 in
Chance of precipitation60%
Record high64° (2010)
Record low32° (1973)
Wed, 0454° / 44°0.31
54 °
Marmac, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.31 in
Chance of precipitation60%
Record high67° (1980)
Record low32° (2003)
Thu, 0553° / 43°0.2
53 °
Marmac, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.2 in
Chance of precipitation63%
Record high65° (1980)
Record low27° (1973)
Fri, 0653° / 43°0.31
53 °
Marmac, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.31 in
Chance of precipitation62%
Record high60° (1999)
Record low31° (2003)
Sat, 0753° / 43°0.27
53 °
Marmac, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.27 in
Chance of precipitation60%
Record high62° (1962)
Record low32° (2003)
Sun, 0853° / 42°0.19
53 °
Marmac, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.19 in
Chance of precipitation50%
Record high67° (2016)
Record low31° (2020)
Mon, 0952° / 42°0.23
52 °
Marmac, Monday, 9 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.23 in
Chance of precipitation63%
Record high63° (2025)
Record low31° (2020)
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 Marmac, 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 Marmac, 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.