Monthly outlook for Harrington, WA: average high 57.1°, average low 41.2°. That is 1.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 21 October (68.6°), the coolest 18 October (30.8°).
57.1°/41.2°
Average high / low
+1.5°
Above normal
2 / 4
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
59.4°
56.6°
+1.6°
28 October – 6 November
53.3°
50.2°
+1.7°
7 November – 16 November
at normal
46.2°
—
October records over 66 years
86.2°2 October 1975All-time high
16.3°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Downs (10 mi).
Mon, 1961° / 36°0
61 °
Harrington, Monday, 19 October
Overcast. High 61°, low 36°.
Pressure29.91 inHg
Wind1.1 mph NE
Humidity40%
Visibility6.2 mi
Dew point31°
Tue, 2067° / 45°0
67 °
Harrington, Tuesday, 20 October
Overcast. High 67°, low 45°.
Pressure30.03 inHg
Wind8.4 mph NE
Humidity34%
Visibility6.2 mi
Dew point35°
Wed, 2169° / 46°0
69 °
Harrington, Wednesday, 21 October
Mostly clear. High 69°, low 46°.
Pressure29.94 inHg
Wind4.3 mph E
Humidity35%
Visibility6.2 mi
Dew point36°
Thu, 2257° / 48°0.06
57 °
Harrington, Thursday, 22 October
Light rain. High 57°, low 48°.
Pressure29.88 inHg
Wind10.2 mph S
Humidity74%
Visibility—
Dew point43°
Fri, 2355° / 38°0
55 °
Harrington, Friday, 23 October
Clear. High 55°, low 38°.
Pressure30.12 inHg
Wind10.7 mph W
Humidity46%
Visibility—
Dew point29°
Sat, 2455° / 38°0
55 °
Harrington, Saturday, 24 October
Partly cloudy. High 55°, low 38°.
Pressure30.42 inHg
Wind10 mph NE
Humidity35%
Visibility—
Dew point22°
Sun, 2559° / 42°0
59 °
Harrington, Sunday, 25 October
Partly cloudy. High 59°, low 42°.
Pressure30.18 inHg
Wind8.8 mph NE
Humidity30%
Visibility—
Dew point20°
Mon, 2656° / 41°0
56 °
Harrington, Monday, 26 October
Clear. High 56°, low 41°.
Pressure30.03 inHg
Wind9.8 mph NE
Humidity38%
Visibility—
Dew point26°
Tue, 2755° / 38°0
55 °
Harrington, Tuesday, 27 October
Overcast. High 55°, low 38°.
Pressure30.06 inHg
Wind7.4 mph NE
Humidity53%
Visibility—
Dew point31°
Wed, 2857° / 40°0
57 °
Harrington, Wednesday, 28 October
Clear. High 57°, low 40°.
Pressure30.09 inHg
Wind5.8 mph SW
Humidity47%
Visibility—
Dew point30°
Thu, 2955° / 40°0
55 °
Harrington, Thursday, 29 October
Overcast. High 55°, low 40°.
Pressure29.94 inHg
Wind10.9 mph SW
Humidity54%
Visibility—
Dew point33°
Fri, 3053° / 44°0
53 °
Harrington, Friday, 30 October
Overcast. High 53°, low 44°.
Pressure29.83 inHg
Wind13.4 mph SW
Humidity50%
Visibility—
Dew point31°
Sat, 3155° / 46°0
55 °
Harrington, Saturday, 31 October
Overcast. High 55°, low 46°.
Pressure29.71 inHg
Wind25.3 mph SW
Humidity52%
Visibility—
Dew point34°
Sun, 0151° / 44°0.04
51 °
Harrington, Sunday, 1 November
Light rain. High 51°, low 44°.
Pressure29.94 inHg
Wind13.5 mph SW
Humidity65%
Visibility—
Dew point37°
Mon, 0250° / 45°0.03
50 °
Harrington, Monday, 2 November
Light rain. High 50°, low 45°.
Pressure29.97 inHg
Wind11.5 mph SW
Humidity78%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0350° / 37°0.04
50 °
Harrington, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.04 in
Chance of precipitation27%
Record high63° (1975)
Record low24° (2002)
Wed, 0450° / 37°0.09
50 °
Harrington, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.09 in
Chance of precipitation40%
Record high65° (1975)
Record low23° (2003)
Thu, 0549° / 36°0.05
49 °
Harrington, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.05 in
Chance of precipitation35%
Record high61° (1987)
Record low17° (2003)
Fri, 0648° / 35°0.06
48 °
Harrington, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.06 in
Chance of precipitation32%
Record high61° (2006)
Record low18° (2003)
Sat, 0748° / 36°0.09
48 °
Harrington, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.09 in
Chance of precipitation28%
Record high62° (1999)
Record low23° (2017)
Sun, 0847° / 35°0.04
47 °
Harrington, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.04 in
Chance of precipitation23%
Record high62° (2016)
Record low24° (2018)
Mon, 0947° / 35°0.05
47 °
Harrington, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.05 in
Chance of precipitation23%
Record high61° (1989)
Record low22° (2020)
Tue, 1046° / 34°0.05
46 °
Harrington, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.05 in
Chance of precipitation30%
Record high61° (2016)
Record low15° (1986)
Wed, 1147° / 34°0.05
47 °
Harrington, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.05 in
Chance of precipitation25%
Record high60° (1990)
Record low6° (2000)
Thu, 1246° / 35°0.06
46 °
Harrington, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.06 in
Chance of precipitation30%
Record high64° (1999)
Record low10° (2000)
Fri, 1346° / 34°0.08
46 °
Harrington, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.08 in
Chance of precipitation37%
Record high60° (1999)
Record low14° (2000)
Sat, 1446° / 34°0.04
46 °
Harrington, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.04 in
Chance of precipitation23%
Record high63° (1999)
Record low13° (1964)
Sun, 1545° / 33°0.06
45 °
Harrington, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.06 in
Chance of precipitation35%
Record high59° (2025)
Record low6° (2000)
Mon, 1644° / 33°0.07
44 °
Harrington, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.07 in
Chance of precipitation42%
Record high59° (1999)
Record low16° (2000)
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 Harrington, 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 Harrington, 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.