Monthly outlook for Fairfax, WA: average high 50.9°, average low 39.3°. That is 2.2° below the climate normal for October. Precipitation is expected on 8 days (about 4.9 inches), against a normal of 8 days and 3.6 inches. The warmest day looks like 21 October (66.2°), the coolest 18 October (31°).
50.9°/39.3°
Average high / low
−2.2°
Below normal
8 / 8
Wet days / normal
4.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
55.4°
56.2°
-0.4°
27 October – 5 November
43.3°
52.4°
-5.1°
6 November – 15 November
at normal
50°
—
October records over 66 years
86.2°1 October 1987All-time high
24.1°28 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Graham (12 mi).
Sun, 1859° / 31°0
59 °
Fairfax, Sunday, 18 October
Overcast. High 59°, low 31°.
Pressure30.15 inHg
Wind4.1 mph N
Humidity56%
Visibility6.2 mi
Dew point38°
Mon, 1956° / 46°0
56 °
Fairfax, Monday, 19 October
Overcast. High 56°, low 46°.
Pressure29.97 inHg
Wind2.8 mph NW
Humidity63%
Visibility6.2 mi
Dew point42°
Tue, 2059° / 44°0
59 °
Fairfax, Tuesday, 20 October
Mostly clear. High 59°, low 44°.
Pressure30.06 inHg
Wind3.8 mph N
Humidity65%
Visibility6.2 mi
Dew point43°
Wed, 2166° / 50°0
66 °
Fairfax, Wednesday, 21 October
Clear. High 66°, low 50°.
Pressure29.94 inHg
Wind2.9 mph NW
Humidity51%
Visibility—
Dew point43°
Thu, 2255° / 44°0
55 °
Fairfax, Thursday, 22 October
Light rain. High 55°, low 44°.
Pressure30.00 inHg
Wind6.6 mph S
Humidity64%
Visibility—
Dew point40°
Fri, 2353° / 40°0
53 °
Fairfax, Friday, 23 October
Overcast. High 53°, low 40°.
Pressure30.06 inHg
Wind5.5 mph SE
Humidity52%
Visibility—
Dew point31°
Sat, 2452° / 41°0.26
52 °
Fairfax, Saturday, 24 October
Light rain. High 52°, low 41°.
Pressure29.71 inHg
Wind8.9 mph S
Humidity84%
Visibility—
Dew point44°
Sun, 2548° / 39°0.13
48 °
Fairfax, Sunday, 25 October
Light rain. High 48°, low 39°.
Pressure29.94 inHg
Wind6 mph S
Humidity65%
Visibility—
Dew point36°
Mon, 2647° / 40°0.94
47 °
Fairfax, Monday, 26 October
Rain. High 47°, low 40°.
Pressure29.80 inHg
Wind9.8 mph S
Humidity89%
Visibility—
Dew point43°
Tue, 2742° / 40°0.83
42 °
Fairfax, Tuesday, 27 October
Rain. High 42°, low 40°.
Pressure29.88 inHg
Wind11 mph SW
Humidity97%
Visibility—
Dew point39°
Wed, 2841° / 38°1.54
41 °
Fairfax, Wednesday, 28 October
Heavy rain. High 41°, low 38°.
Pressure29.80 inHg
Wind13 mph S
Humidity92%
Visibility—
Dew point38°
Thu, 2943° / 35°0.57
43 °
Fairfax, Thursday, 29 October
Rain. High 43°, low 35°.
Pressure29.85 inHg
Wind6.2 mph SE
Humidity92%
Visibility—
Dew point38°
Fri, 3044° / 34°0.01
44 °
Fairfax, Friday, 30 October
Snow. High 44°, low 34°.
Pressure30.00 inHg
Wind5.4 mph SE
Humidity89%
Visibility—
Dew point36°
Sat, 3142° / 35°0.43
42 °
Fairfax, Saturday, 31 October
Light rain. High 42°, low 35°.
Pressure29.50 inHg
Wind8.8 mph SE
Humidity95%
Visibility—
Dew point41°
Sun, 0147° / 32°0
47 °
Fairfax, Sunday, 1 November
Overcast. High 47°, low 32°.
Pressure29.74 inHg
Wind6.1 mph SE
Humidity69%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0253° / 40°0.22
53 °
Fairfax, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.22 in
Chance of precipitation60%
Record high67° (1962)
Record low27° (1973)
Tue, 0352° / 41°0.28
52 °
Fairfax, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.28 in
Chance of precipitation62%
Record high65° (2010)
Record low28° (2003)
Wed, 0452° / 41°0.35
52 °
Fairfax, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.35 in
Chance of precipitation60%
Record high67° (1980)
Record low28° (2003)
Thu, 0551° / 40°0.22
51 °
Fairfax, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.22 in
Chance of precipitation67%
Record high64° (1997)
Record low23° (1973)
Fri, 0651° / 40°0.35
51 °
Fairfax, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.35 in
Chance of precipitation58%
Record high63° (1999)
Record low27° (2003)
Sat, 0751° / 40°0.31
51 °
Fairfax, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.31 in
Chance of precipitation68%
Record high64° (2016)
Record low27° (2017)
Sun, 0851° / 39°0.2
51 °
Fairfax, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.2 in
Chance of precipitation48%
Record high66° (2016)
Record low27° (2020)
Mon, 0949° / 39°0.25
49 °
Fairfax, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.25 in
Chance of precipitation72%
Record high61° (1976)
Record low24° (2020)
Tue, 1050° / 39°0.22
50 °
Fairfax, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.22 in
Chance of precipitation52%
Record high64° (2016)
Record low24° (1986)
Wed, 1150° / 39°0.31
50 °
Fairfax, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.31 in
Chance of precipitation62%
Record high62° (1990)
Record low21° (1985)
Thu, 1250° / 40°0.34
50 °
Fairfax, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.34 in
Chance of precipitation67%
Record high62° (1990)
Record low20° (1985)
Fri, 1350° / 39°0.33
50 °
Fairfax, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.33 in
Chance of precipitation63%
Record high63° (1967)
Record low21° (1985)
Sat, 1449° / 39°0.3
49 °
Fairfax, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.3 in
Chance of precipitation53%
Record high64° (1999)
Record low17° (1964)
Sun, 1549° / 38°0.28
49 °
Fairfax, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.28 in
Chance of precipitation65%
Record high60° (2001)
Record low14° (1964)
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 Fairfax, 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 Fairfax, 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.