Monthly outlook for Upper Mill, WA: average high 64.7°, average low 45.3°. That is 3.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 8 days and 3.4 inches. The warmest day looks like 21 October (73.7°), the coolest 12 October (36.4°).
64.7°/45.3°
Average high / low
+3.6°
Above normal
3 / 8
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
60.6°
59.1°
+0.8°
17 October – 26 October
71.6°
55.5°
+8.9°
27 October – 5 November
at normal
50.5°
—
October records over 66 years
87.3°1 October 1987All-time high
5.5°28 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Greenwater (14 mi).
Thu, 0872° / 47°0
72 °
Upper Mill, Thursday, 8 October
Overcast. High 72°, low 47°.
Pressure30.03 inHg
Wind2.5 mph W
Humidity61%
Visibility3.9 mi
Dew point52°
Fri, 0959° / 48°0.21
59 °
Upper Mill, Friday, 9 October
Rain. High 59°, low 48°.
Pressure29.77 inHg
Wind13.2 mph SW
Humidity81%
Visibility6.2 mi
Dew point49°
Sat, 1056° / 42°0.22
56 °
Upper Mill, Saturday, 10 October
Rain. High 56°, low 42°.
Pressure29.83 inHg
Wind3.1 mph NW
Humidity67%
Visibility6.2 mi
Dew point42°
Sun, 1161° / 41°0
61 °
Upper Mill, Sunday, 11 October
Clear. High 61°, low 41°.
Pressure30.06 inHg
Wind9.6 mph E
Humidity43%
Visibility—
Dew point31°
Mon, 1265° / 36°0
65 °
Upper Mill, Monday, 12 October
Clear. High 65°, low 36°.
Pressure30.06 inHg
Wind7.7 mph E
Humidity43%
Visibility—
Dew point33°
Tue, 1349° / 45°0.14
49 °
Upper Mill, Tuesday, 13 October
Light rain. High 49°, low 45°.
Pressure29.94 inHg
Wind13.1 mph SW
Humidity89%
Visibility—
Dew point43°
Wed, 1455° / 41°0.01
55 °
Upper Mill, Wednesday, 14 October
Light rain. High 55°, low 41°.
Pressure30.18 inHg
Wind6.4 mph SW
Humidity57%
Visibility—
Dew point37°
Thu, 1561° / 39°0
61 °
Upper Mill, Thursday, 15 October
Partly cloudy. High 61°, low 39°.
Pressure30.36 inHg
Wind5.8 mph E
Humidity31%
Visibility—
Dew point23°
Fri, 1658° / 43°0
58 °
Upper Mill, Friday, 16 October
Overcast. High 58°, low 43°.
Pressure30.30 inHg
Wind5.5 mph E
Humidity32%
Visibility—
Dew point25°
Sat, 1766° / 43°0
66 °
Upper Mill, Saturday, 17 October
Clear. High 66°, low 43°.
Pressure30.21 inHg
Wind6.3 mph E
Humidity28%
Visibility—
Dew point25°
Sun, 1873° / 48°0
73 °
Upper Mill, Sunday, 18 October
Clear. High 73°, low 48°.
Pressure30.03 inHg
Wind6.4 mph E
Humidity24%
Visibility—
Dew point26°
Mon, 1973° / 50°0
73 °
Upper Mill, Monday, 19 October
Clear. High 73°, low 50°.
Pressure30.06 inHg
Wind5.5 mph E
Humidity25%
Visibility—
Dew point28°
Tue, 2074° / 52°0
74 °
Upper Mill, Tuesday, 20 October
Overcast. High 74°, low 52°.
Pressure30.15 inHg
Wind5.8 mph SE
Humidity25%
Visibility—
Dew point29°
Wed, 2174° / 52°0
74 °
Upper Mill, Wednesday, 21 October
Overcast. High 74°, low 52°.
Pressure30.12 inHg
Wind6 mph SE
Humidity26%
Visibility—
Dew point30°
Thu, 2271° / 51°0
71 °
Upper Mill, Thursday, 22 October
Clear. High 71°, low 51°.
Pressure29.97 inHg
Wind4.9 mph SE
Humidity30%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2355° / 40°0.21
55 °
Upper Mill, Friday, 23 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.21 in
Chance of precipitation45%
Record high74° (1965)
Record low27° (1984)
Sat, 2455° / 40°0.24
55 °
Upper Mill, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.24 in
Chance of precipitation50%
Record high74° (1965)
Record low22° (1975)
Sun, 2553° / 39°0.29
53 °
Upper Mill, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.29 in
Chance of precipitation58%
Record high73° (1965)
Record low27° (2020)
Mon, 2652° / 39°0.35
52 °
Upper Mill, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.35 in
Chance of precipitation60%
Record high73° (2003)
Record low16° (1970)
Tue, 2753° / 39°0.26
53 °
Upper Mill, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.26 in
Chance of precipitation55%
Record high72° (2017)
Record low17° (1970)
Wed, 2851° / 37°0.3
51 °
Upper Mill, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.3 in
Chance of precipitation57%
Record high71° (1987)
Record low6° (1971)
Thu, 2951° / 37°0.24
51 °
Upper Mill, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.24 in
Chance of precipitation52%
Record high70° (1962)
Record low12° (1971)
Fri, 3050° / 37°0.31
50 °
Upper Mill, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.31 in
Chance of precipitation55%
Record high64° (1993)
Record low13° (1972)
Sat, 3150° / 38°0.39
50 °
Upper Mill, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.39 in
Chance of precipitation68%
Record high65° (1962)
Record low21° (1984)
Sun, 0150° / 37°0.34
50 °
Upper Mill, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.34 in
Chance of precipitation60%
Record high68° (1962)
Record low24° (1984)
Mon, 0251° / 37°0.24
51 °
Upper Mill, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.24 in
Chance of precipitation57%
Record high67° (1962)
Record low17° (1973)
Tue, 0350° / 38°0.34
50 °
Upper Mill, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.34 in
Chance of precipitation60%
Record high66° (1962)
Record low18° (1994)
Wed, 0451° / 38°0.45
51 °
Upper Mill, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.45 in
Chance of precipitation65%
Record high67° (1976)
Record low22° (1971)
Thu, 0549° / 36°0.28
49 °
Upper Mill, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.28 in
Chance of precipitation67%
Record high64° (1997)
Record low2° (1971)
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 Upper Mill, 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 Upper Mill, 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.