Monthly outlook for Thornton, WA: average high 61.4°, average low 42.5°. That is 3° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 16 October (73.4°), the coolest 14 October (36.9°).
61.4°/42.5°
Average high / low
+3°
Above normal
0 / 4
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
62.2°
57.9°
+2.4°
24 October – 2 November
60.1°
51.7°
+4.7°
3 November – 12 November
at normal
47.4°
—
October records over 66 years
85.5°2 October 1975All-time high
13.3°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Plaza (14 mi).
Thu, 1570° / 38°0
70 °
Thornton, Thursday, 15 October
Clear. High 70°, low 38°.
Pressure30.50 inHg
Wind8.5 mph E
Humidity34%
Visibility6.2 mi
Dew point34°
Fri, 1673° / 46°0
73 °
Thornton, Friday, 16 October
Overcast. High 73°, low 46°.
Pressure30.30 inHg
Wind7.9 mph S
Humidity24%
Visibility6.2 mi
Dew point28°
Sat, 1766° / 47°0
66 °
Thornton, Saturday, 17 October
Overcast. High 66°, low 47°.
Pressure30.06 inHg
Wind13.6 mph SW
Humidity33%
Visibility6.2 mi
Dew point35°
Sun, 1861° / 40°0
61 °
Thornton, Sunday, 18 October
Overcast. High 61°, low 40°.
Pressure30.09 inHg
Wind5.7 mph NE
Humidity36%
Visibility—
Dew point28°
Mon, 1957° / 45°0
57 °
Thornton, Monday, 19 October
Overcast. High 57°, low 45°.
Pressure29.88 inHg
Wind5.9 mph W
Humidity59%
Visibility—
Dew point38°
Tue, 2056° / 43°0
56 °
Thornton, Tuesday, 20 October
Overcast. High 56°, low 43°.
Pressure30.03 inHg
Wind5.9 mph W
Humidity40%
Visibility—
Dew point27°
Wed, 2159° / 41°0
59 °
Thornton, Wednesday, 21 October
Clear. High 59°, low 41°.
Pressure30.12 inHg
Wind3.5 mph E
Humidity45%
Visibility—
Dew point30°
Thu, 2260° / 42°0
60 °
Thornton, Thursday, 22 October
Clear. High 60°, low 42°.
Pressure29.94 inHg
Wind7.4 mph W
Humidity40%
Visibility—
Dew point29°
Fri, 2358° / 42°0
58 °
Thornton, Friday, 23 October
Clear. High 58°, low 42°.
Pressure30.21 inHg
Wind7.7 mph SW
Humidity42%
Visibility—
Dew point29°
Sat, 2462° / 40°0
62 °
Thornton, Saturday, 24 October
Overcast. High 62°, low 40°.
Pressure30.33 inHg
Wind9.2 mph SE
Humidity31%
Visibility—
Dew point24°
Sun, 2563° / 46°0
63 °
Thornton, Sunday, 25 October
Overcast. High 63°, low 46°.
Pressure30.33 inHg
Wind6.6 mph SE
Humidity22%
Visibility—
Dew point17°
Mon, 2664° / 49°0
64 °
Thornton, Monday, 26 October
Overcast. High 64°, low 49°.
Pressure30.06 inHg
Wind8.6 mph SW
Humidity23%
Visibility—
Dew point21°
Tue, 2758° / 41°0
58 °
Thornton, Tuesday, 27 October
Mostly clear. High 58°, low 41°.
Pressure30.15 inHg
Wind7.9 mph NW
Humidity35%
Visibility—
Dew point25°
Wed, 2860° / 42°0
60 °
Thornton, Wednesday, 28 October
Overcast. High 60°, low 42°.
Pressure29.97 inHg
Wind11 mph S
Humidity22%
Visibility—
Dew point15°
Thu, 2953° / 41°0
53 °
Thornton, Thursday, 29 October
Overcast. High 53°, low 41°.
Pressure29.97 inHg
Wind15 mph SW
Humidity42%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3050° / 35°0.06
50 °
Thornton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.06 in
Chance of precipitation30%
Record high67° (2008)
Record low15° (2019)
Sat, 3150° / 36°0.09
50 °
Thornton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.09 in
Chance of precipitation28%
Record high67° (1988)
Record low17° (1984)
Sun, 0150° / 35°0.09
50 °
Thornton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.09 in
Chance of precipitation38%
Record high68° (1965)
Record low19° (2002)
Mon, 0250° / 35°0.09
50 °
Thornton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.09 in
Chance of precipitation37%
Record high65° (1981)
Record low20° (1961)
Tue, 0350° / 35°0.04
50 °
Thornton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.04 in
Chance of precipitation30%
Record high64° (1965)
Record low22° (1973)
Wed, 0449° / 36°0.12
49 °
Thornton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.12 in
Chance of precipitation45%
Record high66° (1975)
Record low22° (2003)
Thu, 0548° / 34°0.08
48 °
Thornton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.08 in
Chance of precipitation40%
Record high64° (1975)
Record low17° (1973)
Fri, 0648° / 34°0.1
48 °
Thornton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.1 in
Chance of precipitation48%
Record high64° (1999)
Record low17° (2003)
Sat, 0747° / 34°0.12
47 °
Thornton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.12 in
Chance of precipitation42%
Record high67° (1999)
Record low13° (2017)
Sun, 0847° / 33°0.06
47 °
Thornton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.06 in
Chance of precipitation30%
Record high65° (2016)
Record low22° (2022)
Mon, 0946° / 33°0.07
46 °
Thornton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.07 in
Chance of precipitation38%
Record high60° (1989)
Record low19° (1986)
Tue, 1046° / 33°0.07
46 °
Thornton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.07 in
Chance of precipitation37%
Record high62° (2016)
Record low12° (2022)
Wed, 1146° / 33°0.07
46 °
Thornton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.07 in
Chance of precipitation30%
Record high62° (2016)
Record low2° (2000)
Thu, 1246° / 33°0.09
46 °
Thornton, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.09 in
Chance of precipitation38%
Record high67° (1999)
Record low6° (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 Thornton, 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 Thornton, 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.