Monthly outlook for Upper Preston, WA: average high 57.2°, average low 41°. That is 0.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 8 days and 3.4 inches. The warmest day looks like 16 October (70.6°), the coolest 18 October (37.5°).
57.2°/41°
Average high / low
+0.9°
Above normal
2 / 8
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
58°
57°
+0.5°
26 October – 4 November
55.9°
53.1°
+1.6°
5 November – 14 November
at normal
50.7°
—
October records over 66 years
86.7°16 October 2022All-time high
22.8°28 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Bellevue (13 mi).
Sat, 1758° / 43°0.25
58 °
Upper Preston, Saturday, 17 October
Rain. High 58°, low 43°.
Pressure30.27 inHg
Wind3.4 mph E
Humidity91%
Visibility6.2 mi
Dew point52°
Sun, 1857° / 38°0
57 °
Upper Preston, Sunday, 18 October
Overcast. High 57°, low 38°.
Pressure30.15 inHg
Wind3.8 mph NW
Humidity64%
Visibility6.2 mi
Dew point43°
Mon, 1956° / 40°0
56 °
Upper Preston, Monday, 19 October
Overcast. High 56°, low 40°.
Pressure29.88 inHg
Wind2.4 mph W
Humidity60%
Visibility6.2 mi
Dew point42°
Tue, 2056° / 40°0
56 °
Upper Preston, Tuesday, 20 October
Partly cloudy. High 56°, low 40°.
Pressure30.06 inHg
Wind5.1 mph NW
Humidity80%
Visibility—
Dew point43°
Wed, 2161° / 39°0
61 °
Upper Preston, Wednesday, 21 October
Overcast. High 61°, low 39°.
Pressure30.00 inHg
Wind3.9 mph NW
Humidity74%
Visibility—
Dew point43°
Thu, 2255° / 42°0
55 °
Upper Preston, Thursday, 22 October
Overcast. High 55°, low 42°.
Pressure29.91 inHg
Wind4.3 mph NW
Humidity61%
Visibility—
Dew point38°
Fri, 2350° / 40°0
50 °
Upper Preston, Friday, 23 October
Overcast. High 50°, low 40°.
Pressure30.18 inHg
Wind4 mph SE
Humidity76%
Visibility—
Dew point40°
Sat, 2460° / 39°0
60 °
Upper Preston, Saturday, 24 October
Clear. High 60°, low 39°.
Pressure30.18 inHg
Wind4.9 mph NW
Humidity52%
Visibility—
Dew point35°
Sun, 2555° / 41°0
55 °
Upper Preston, Sunday, 25 October
Overcast. High 55°, low 41°.
Pressure30.12 inHg
Wind4.8 mph W
Humidity52%
Visibility—
Dew point35°
Mon, 2657° / 38°0
57 °
Upper Preston, Monday, 26 October
Clear. High 57°, low 38°.
Pressure30.09 inHg
Wind3.8 mph NW
Humidity61%
Visibility—
Dew point37°
Tue, 2756° / 41°0.01
56 °
Upper Preston, Tuesday, 27 October
Light rain. High 56°, low 41°.
Pressure29.85 inHg
Wind3 mph SE
Humidity54%
Visibility—
Dew point35°
Wed, 2849° / 43°0.31
49 °
Upper Preston, Wednesday, 28 October
Rain. High 49°, low 43°.
Pressure29.91 inHg
Wind3.1 mph S
Humidity97%
Visibility—
Dew point47°
Thu, 2950° / 41°0
50 °
Upper Preston, Thursday, 29 October
Overcast. High 50°, low 41°.
Pressure30.24 inHg
Wind3.2 mph E
Humidity88%
Visibility—
Dew point44°
Fri, 3061° / 40°0
61 °
Upper Preston, Friday, 30 October
Clear. High 61°, low 40°.
Pressure30.12 inHg
Wind5 mph E
Humidity64%
Visibility—
Dew point39°
Sat, 3162° / 45°0
62 °
Upper Preston, Saturday, 31 October
Overcast. High 62°, low 45°.
Pressure29.85 inHg
Wind5.2 mph E
Humidity47%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0153° / 41°0.24
53 °
Upper Preston, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.24 in
Chance of precipitation53%
Record high65° (1969)
Record low28° (1995)
Mon, 0253° / 41°0.2
53 °
Upper Preston, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.2 in
Chance of precipitation58%
Record high67° (1962)
Record low28° (1973)
Tue, 0353° / 42°0.27
53 °
Upper Preston, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.27 in
Chance of precipitation62%
Record high65° (2010)
Record low28° (2003)
Wed, 0453° / 42°0.33
53 °
Upper Preston, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.33 in
Chance of precipitation58%
Record high66° (1980)
Record low28° (2003)
Thu, 0552° / 41°0.19
52 °
Upper Preston, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.19 in
Chance of precipitation58%
Record high64° (1997)
Record low25° (1971)
Fri, 0651° / 41°0.3
51 °
Upper Preston, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.3 in
Chance of precipitation62%
Record high58° (1967)
Record low26° (2003)
Sat, 0751° / 42°0.26
51 °
Upper Preston, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.26 in
Chance of precipitation63%
Record high61° (2016)
Record low29° (2003)
Sun, 0851° / 40°0.19
51 °
Upper Preston, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.19 in
Chance of precipitation53%
Record high65° (2016)
Record low30° (1966)
Mon, 0950° / 40°0.24
50 °
Upper Preston, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.24 in
Chance of precipitation67%
Record high62° (2025)
Record low29° (1982)
Tue, 1051° / 40°0.2
51 °
Upper Preston, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.2 in
Chance of precipitation47%
Record high64° (2016)
Record low26° (1986)
Wed, 1151° / 40°0.24
51 °
Upper Preston, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.24 in
Chance of precipitation57%
Record high61° (1996)
Record low24° (1985)
Thu, 1250° / 40°0.28
50 °
Upper Preston, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.28 in
Chance of precipitation65%
Record high58° (1990)
Record low24° (1978)
Fri, 1350° / 40°0.3
50 °
Upper Preston, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.3 in
Chance of precipitation60%
Record high62° (1967)
Record low25° (1978)
Sat, 1450° / 40°0.3
50 °
Upper Preston, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.3 in
Chance of precipitation55%
Record high62° (1969)
Record low25° (2014)
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 Preston, 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 Preston, 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.