Monthly outlook for Upper Preston, WA: average high 63.9°, average low 45.3°. That is 3.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 8 days and 2.8 inches. The warmest day looks like 16 October (73.1°), the coolest 12 October (34.8°).
63.9°/45.3°
Average high / low
+3.4°
Above normal
4 / 8
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
63.3°
58.7°
+2.6°
20 October – 29 October
65°
55.3°
+5.4°
30 October – 8 November
at normal
52.2°
—
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).
Sun, 1159° / 39°0
59 °
Upper Preston, Sunday, 11 October
Clear. High 59°, low 39°.
Pressure29.97 inHg
Wind2.7 mph NW
Humidity70%
Visibility6.2 mi
Dew point44°
Mon, 1260° / 35°0
60 °
Upper Preston, Monday, 12 October
Clear. High 60°, low 35°.
Pressure30.06 inHg
Wind1.7 mph NW
Humidity59%
Visibility6.2 mi
Dew point42°
Tue, 1362° / 37°0
62 °
Upper Preston, Tuesday, 13 October
Clear. High 62°, low 37°.
Pressure30.15 inHg
Wind3.2 mph NW
Humidity50%
Visibility6.2 mi
Dew point41°
Wed, 1464° / 42°0
64 °
Upper Preston, Wednesday, 14 October
Clear. High 64°, low 42°.
Pressure30.24 inHg
Wind3.1 mph NW
Humidity52%
Visibility6.2 mi
Dew point44°
Thu, 1573° / 43°0
73 °
Upper Preston, Thursday, 15 October
Clear. High 73°, low 43°.
Pressure30.27 inHg
Wind5.6 mph E
Humidity66%
Visibility—
Dew point49°
Fri, 1673° / 49°0
73 °
Upper Preston, Friday, 16 October
Overcast. High 73°, low 49°.
Pressure30.24 inHg
Wind6.9 mph SE
Humidity29%
Visibility—
Dew point31°
Sat, 1769° / 50°0
69 °
Upper Preston, Saturday, 17 October
Overcast. High 69°, low 50°.
Pressure30.15 inHg
Wind5.3 mph SE
Humidity31%
Visibility—
Dew point31°
Sun, 1864° / 50°0
64 °
Upper Preston, Sunday, 18 October
Overcast. High 64°, low 50°.
Pressure30.15 inHg
Wind5.8 mph SW
Humidity58%
Visibility—
Dew point43°
Mon, 1956° / 50°0.53
56 °
Upper Preston, Monday, 19 October
Rain. High 56°, low 50°.
Pressure30.00 inHg
Wind5.7 mph S
Humidity87%
Visibility—
Dew point52°
Tue, 2058° / 46°0.27
58 °
Upper Preston, Tuesday, 20 October
Light rain. High 58°, low 46°.
Pressure30.12 inHg
Wind7.2 mph S
Humidity73%
Visibility—
Dew point45°
Wed, 2161° / 48°0.06
61 °
Upper Preston, Wednesday, 21 October
Light rain. High 61°, low 48°.
Pressure30.21 inHg
Wind5.3 mph E
Humidity68%
Visibility—
Dew point44°
Thu, 2271° / 49°0
71 °
Upper Preston, Thursday, 22 October
Overcast. High 71°, low 49°.
Pressure30.15 inHg
Wind6.2 mph E
Humidity43%
Visibility—
Dew point38°
Fri, 2367° / 49°0
67 °
Upper Preston, Friday, 23 October
Partly cloudy. High 67°, low 49°.
Pressure30.09 inHg
Wind5.2 mph SE
Humidity43%
Visibility—
Dew point39°
Sat, 2467° / 49°0
67 °
Upper Preston, Saturday, 24 October
Clear. High 67°, low 49°.
Pressure30.03 inHg
Wind4.3 mph SE
Humidity57%
Visibility—
Dew point46°
Sun, 2565° / 48°0
65 °
Upper Preston, Sunday, 25 October
Overcast. High 65°, low 48°.
Pressure30.03 inHg
Wind3.6 mph SE
Humidity52%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2654° / 43°0.26
54 °
Upper Preston, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.26 in
Chance of precipitation53%
Record high68° (1965)
Record low30° (1970)
Tue, 2754° / 42°0.21
54 °
Upper Preston, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.21 in
Chance of precipitation47%
Record high65° (1962)
Record low29° (1971)
Wed, 2854° / 42°0.26
54 °
Upper Preston, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.26 in
Chance of precipitation58%
Record high68° (1962)
Record low23° (1971)
Thu, 2953° / 41°0.19
53 °
Upper Preston, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.19 in
Chance of precipitation53%
Record high69° (1962)
Record low26° (1991)
Fri, 3053° / 41°0.21
53 °
Upper Preston, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.21 in
Chance of precipitation55%
Record high62° (1987)
Record low27° (1991)
Sat, 3152° / 41°0.27
52 °
Upper Preston, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.27 in
Chance of precipitation65%
Record high64° (1964)
Record low26° (1984)
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)
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.