Monthly outlook for Alderton, WA: average high 64.9°, average low 46.3°. That is 4.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 7 days and 3.1 inches. The warmest day looks like 16 October (73.2°), the coolest 11 October (41.1°).
64.9°/46.3°
Average high / low
+4.4°
Above normal
2 / 7
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
64.7°
58.1°
+3.7°
21 October – 30 October
65.3°
54.4°
+6.1°
31 October – 9 November
at normal
51.4°
—
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 (9 mi).
Mon, 1262° / 42°0
62 °
Alderton, Monday, 12 October
Clear. High 62°, low 42°.
Pressure30.06 inHg
Wind2.3 mph NW
Humidity63%
Visibility6.2 mi
Dew point44°
Tue, 1362° / 42°0
62 °
Alderton, Tuesday, 13 October
Overcast. High 62°, low 42°.
Pressure30.18 inHg
Wind0.2 mph NE
Humidity64%
Visibility6.2 mi
Dew point44°
Wed, 1465° / 46°0
65 °
Alderton, Wednesday, 14 October
Mostly clear. High 65°, low 46°.
Pressure30.27 inHg
Wind1 mph NW
Humidity68%
Visibility6.2 mi
Dew point47°
Thu, 1569° / 46°0
69 °
Alderton, Thursday, 15 October
Clear. High 69°, low 46°.
Pressure30.30 inHg
Wind2.5 mph NW
Humidity81%
Visibility—
Dew point50°
Fri, 1673° / 49°0
73 °
Alderton, Friday, 16 October
Clear. High 73°, low 49°.
Pressure30.06 inHg
Wind4.3 mph SE
Humidity72%
Visibility—
Dew point53°
Sat, 1771° / 54°0.02
71 °
Alderton, Saturday, 17 October
Light rain. High 71°, low 54°.
Pressure30.09 inHg
Wind9.9 mph SW
Humidity38%
Visibility—
Dew point40°
Sun, 1865° / 51°0
65 °
Alderton, Sunday, 18 October
Overcast. High 65°, low 51°.
Pressure30.12 inHg
Wind4.9 mph W
Humidity69%
Visibility—
Dew point49°
Mon, 1962° / 49°0.15
62 °
Alderton, Monday, 19 October
Light rain. High 62°, low 49°.
Pressure30.18 inHg
Wind12.1 mph SW
Humidity71%
Visibility—
Dew point47°
Tue, 2058° / 45°0.04
58 °
Alderton, Tuesday, 20 October
Light rain. High 58°, low 45°.
Pressure30.15 inHg
Wind8.1 mph SW
Humidity55%
Visibility—
Dew point41°
Wed, 2161° / 42°0
61 °
Alderton, Wednesday, 21 October
Overcast. High 61°, low 42°.
Pressure30.03 inHg
Wind7.2 mph N
Humidity62%
Visibility—
Dew point39°
Thu, 2255° / 49°0.01
55 °
Alderton, Thursday, 22 October
Light rain. High 55°, low 49°.
Pressure29.94 inHg
Wind3.4 mph NW
Humidity60%
Visibility—
Dew point40°
Fri, 2366° / 47°0
66 °
Alderton, Friday, 23 October
Overcast. High 66°, low 47°.
Pressure30.27 inHg
Wind4 mph NW
Humidity53%
Visibility—
Dew point41°
Sat, 2465° / 45°0
65 °
Alderton, Saturday, 24 October
Overcast. High 65°, low 45°.
Pressure30.30 inHg
Wind5.4 mph N
Humidity52%
Visibility—
Dew point40°
Sun, 2573° / 46°0
73 °
Alderton, Sunday, 25 October
Mostly clear. High 73°, low 46°.
Pressure30.12 inHg
Wind4.8 mph NW
Humidity38%
Visibility—
Dew point34°
Mon, 2672° / 48°0
72 °
Alderton, Monday, 26 October
Clear. High 72°, low 48°.
Pressure30.00 inHg
Wind3.2 mph NW
Humidity33%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2754° / 41°0.22
54 °
Alderton, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.22 in
Chance of precipitation48%
Record high68° (1968)
Record low29° (1971)
Wed, 2853° / 40°0.27
53 °
Alderton, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.27 in
Chance of precipitation60%
Record high69° (1962)
Record low24° (2023)
Thu, 2953° / 41°0.19
53 °
Alderton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.19 in
Chance of precipitation45%
Record high69° (1962)
Record low25° (1971)
Fri, 3052° / 40°0.24
52 °
Alderton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.24 in
Chance of precipitation55%
Record high61° (1987)
Record low25° (1991)
Sat, 3152° / 41°0.33
52 °
Alderton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.33 in
Chance of precipitation60%
Record high65° (1964)
Record low28° (2006)
Sun, 0152° / 40°0.26
52 °
Alderton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.26 in
Chance of precipitation55%
Record high67° (1969)
Record low28° (2003)
Mon, 0253° / 40°0.22
53 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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 °
Alderton, 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)
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 Alderton, 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 Alderton, 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.