Monthly outlook for Marmac, WA: average high 59.7°, average low 43.7°. That is 0.1° above the climate normal for October. Precipitation is expected on 5 days (about 6.4 inches), against a normal of 6 days and 2.7 inches. The warmest day looks like 17 October (69.5°), the coolest 12 October (37.9°).
59.7°/43.7°
Average high / low
+0.1°
Above normal
5 / 6
Wet days / normal
6.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
63.2°
60.6°
+1.4°
20 October – 29 October
53.9°
56.9°
-1.7°
30 October – 8 November
at normal
53.7°
—
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).
Sun, 1162° / 41°0
62 °
Marmac, Sunday, 11 October
Clear. High 62°, low 41°.
Pressure29.97 inHg
Wind2.7 mph NE
Humidity57%
Visibility6.2 mi
Dew point42°
Mon, 1262° / 38°0
62 °
Marmac, Monday, 12 October
Clear. High 62°, low 38°.
Pressure30.06 inHg
Wind0.1 mph N
Humidity53%
Visibility6.2 mi
Dew point41°
Tue, 1363° / 41°0
63 °
Marmac, Tuesday, 13 October
Mostly clear. High 63°, low 41°.
Pressure30.12 inHg
Wind0.1 mph NW
Humidity58%
Visibility6.2 mi
Dew point43°
Wed, 1465° / 43°0
65 °
Marmac, Wednesday, 14 October
Mostly clear. High 65°, low 43°.
Pressure30.21 inHg
Wind4.3 mph W
Humidity58%
Visibility—
Dew point41°
Thu, 1568° / 45°0
68 °
Marmac, Thursday, 15 October
Clear. High 68°, low 45°.
Pressure30.21 inHg
Wind4.7 mph SE
Humidity66%
Visibility—
Dew point46°
Fri, 1667° / 43°0
67 °
Marmac, Friday, 16 October
Overcast. High 67°, low 43°.
Pressure30.30 inHg
Wind4.4 mph E
Humidity55%
Visibility—
Dew point39°
Sat, 1769° / 42°0
69 °
Marmac, Saturday, 17 October
Overcast. High 69°, low 42°.
Pressure30.12 inHg
Wind6.2 mph SW
Humidity37%
Visibility—
Dew point31°
Sun, 1861° / 46°0.01
61 °
Marmac, Sunday, 18 October
Light rain. High 61°, low 46°.
Pressure30.15 inHg
Wind6.5 mph SW
Humidity75%
Visibility—
Dew point48°
Mon, 1960° / 48°0
60 °
Marmac, Monday, 19 October
Overcast. High 60°, low 48°.
Pressure30.06 inHg
Wind7.4 mph W
Humidity68%
Visibility—
Dew point44°
Tue, 2050° / 48°0.44
50 °
Marmac, Tuesday, 20 October
Light rain. High 50°, low 48°.
Pressure29.91 inHg
Wind5.6 mph S
Humidity96%
Visibility—
Dew point48°
Wed, 2154° / 45°0.67
54 °
Marmac, Wednesday, 21 October
Rain. High 54°, low 45°.
Pressure30.03 inHg
Wind7.3 mph S
Humidity86%
Visibility—
Dew point46°
Thu, 2258° / 48°2.23
58 °
Marmac, Thursday, 22 October
Heavy rain. High 58°, low 48°.
Pressure30.00 inHg
Wind18.3 mph SW
Humidity95%
Visibility—
Dew point50°
Fri, 2357° / 43°0.02
57 °
Marmac, Friday, 23 October
Light rain. High 57°, low 43°.
Pressure30.21 inHg
Wind11.1 mph W
Humidity82%
Visibility—
Dew point47°
Sat, 2457° / 43°2.9
57 °
Marmac, Saturday, 24 October
Heavy rain. High 57°, low 43°.
Pressure30.00 inHg
Wind15.8 mph SW
Humidity99%
Visibility—
Dew point45°
Sun, 2547° / 42°0.16
47 °
Marmac, Sunday, 25 October
Light rain. High 47°, low 42°.
Pressure29.77 inHg
Wind13.3 mph W
Humidity88%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 45°0.23
56 °
Marmac, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.23 in
Chance of precipitation52%
Record high69° (1965)
Record low34° (1970)
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)
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.