Monthly outlook for Mason, WA: average high 59.8°, average low 41.9°. That is 1° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 16 October (74.9°), the coolest 13 October (34.9°).
59.8°/41.9°
Average high / low
+1°
Above normal
1 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
61°
59.3°
+1°
21 October – 30 October
57.6°
54.1°
+2°
31 October – 9 November
at normal
48.9°
—
October records over 66 years
87.1°2 October 1975All-time high
16.7°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Sprague (9 mi).
Mon, 1256° / 39°0.01
56 °
Mason, Monday, 12 October
Light rain. High 56°, low 39°.
Pressure30.03 inHg
Wind2.8 mph NE
Humidity47%
Visibility6.2 mi
Dew point29°
Tue, 1358° / 35°0
58 °
Mason, Tuesday, 13 October
Overcast. High 58°, low 35°.
Pressure30.15 inHg
Wind4.9 mph SW
Humidity43%
Visibility6.2 mi
Dew point31°
Wed, 1462° / 38°0
62 °
Mason, Wednesday, 14 October
Overcast. High 62°, low 38°.
Pressure30.24 inHg
Wind3 mph SW
Humidity36%
Visibility6.2 mi
Dew point30°
Thu, 1567° / 40°0
67 °
Mason, Thursday, 15 October
Clear. High 67°, low 40°.
Pressure30.45 inHg
Wind8.6 mph NE
Humidity42%
Visibility—
Dew point33°
Fri, 1675° / 46°0
75 °
Mason, Friday, 16 October
Clear. High 75°, low 46°.
Pressure30.21 inHg
Wind8.9 mph SW
Humidity32%
Visibility—
Dew point34°
Sat, 1768° / 51°0
68 °
Mason, Saturday, 17 October
Overcast. High 68°, low 51°.
Pressure30.03 inHg
Wind16.3 mph SW
Humidity39%
Visibility—
Dew point36°
Sun, 1862° / 47°0
62 °
Mason, Sunday, 18 October
Overcast. High 62°, low 47°.
Pressure30.03 inHg
Wind7.9 mph S
Humidity56%
Visibility—
Dew point39°
Mon, 1960° / 45°0.01
60 °
Mason, Monday, 19 October
Light rain. High 60°, low 45°.
Pressure29.97 inHg
Wind15 mph SW
Humidity41%
Visibility—
Dew point32°
Tue, 2054° / 40°0
54 °
Mason, Tuesday, 20 October
Clear. High 54°, low 40°.
Pressure30.15 inHg
Wind14.4 mph S
Humidity55%
Visibility—
Dew point33°
Wed, 2154° / 39°0
54 °
Mason, Wednesday, 21 October
Overcast. High 54°, low 39°.
Pressure30.12 inHg
Wind7 mph S
Humidity52%
Visibility—
Dew point31°
Thu, 2258° / 40°0
58 °
Mason, Thursday, 22 October
Overcast. High 58°, low 40°.
Pressure30.15 inHg
Wind8.3 mph NE
Humidity46%
Visibility—
Dew point31°
Fri, 2358° / 44°0
58 °
Mason, Friday, 23 October
Overcast. High 58°, low 44°.
Pressure30.06 inHg
Wind15.4 mph SW
Humidity46%
Visibility—
Dew point31°
Sat, 2458° / 44°0
58 °
Mason, Saturday, 24 October
Overcast. High 58°, low 44°.
Pressure30.18 inHg
Wind6 mph W
Humidity52%
Visibility—
Dew point35°
Sun, 2557° / 40°0
57 °
Mason, Sunday, 25 October
Overcast. High 57°, low 40°.
Pressure30.45 inHg
Wind7.7 mph NE
Humidity44%
Visibility—
Dew point29°
Mon, 2660° / 42°0
60 °
Mason, Monday, 26 October
Overcast. High 60°, low 42°.
Pressure30.18 inHg
Wind9.7 mph SW
Humidity38%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2753° / 38°0.06
53 °
Mason, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.06 in
Chance of precipitation30%
Record high69° (1965)
Record low23° (2020)
Wed, 2852° / 38°0.05
52 °
Mason, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.05 in
Chance of precipitation30%
Record high68° (2003)
Record low21° (1991)
Thu, 2951° / 37°0.06
51 °
Mason, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation30%
Record high67° (1983)
Record low19° (2019)
Fri, 3051° / 37°0.06
51 °
Mason, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation27%
Record high63° (2015)
Record low18° (2019)
Sat, 3150° / 37°0.07
50 °
Mason, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.07 in
Chance of precipitation28%
Record high66° (1988)
Record low17° (1984)
Sun, 0150° / 36°0.08
50 °
Mason, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.08 in
Chance of precipitation35%
Record high68° (1965)
Record low20° (2002)
Mon, 0250° / 36°0.07
50 °
Mason, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.07 in
Chance of precipitation32%
Record high64° (1981)
Record low21° (2002)
Tue, 0350° / 37°0.04
50 °
Mason, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.04 in
Chance of precipitation23%
Record high63° (1975)
Record low24° (2002)
Wed, 0450° / 37°0.1
50 °
Mason, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation42%
Record high65° (1975)
Record low23° (2003)
Thu, 0548° / 35°0.07
48 °
Mason, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation37%
Record high62° (1987)
Record low17° (2003)
Fri, 0648° / 35°0.07
48 °
Mason, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation35%
Record high61° (1999)
Record low17° (2003)
Sat, 0748° / 36°0.11
48 °
Mason, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.11 in
Chance of precipitation35%
Record high64° (1999)
Record low22° (1973)
Sun, 0847° / 35°0.06
47 °
Mason, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.06 in
Chance of precipitation30%
Record high64° (2016)
Record low24° (2022)
Mon, 0947° / 35°0.06
47 °
Mason, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.06 in
Chance of precipitation38%
Record high61° (1989)
Record low22° (1986)
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 Mason, 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 Mason, 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.