Monthly outlook for Startup, WA: average high 63.2°, average low 45.2°. That is 1.9° above the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 8 days and 4.3 inches. The warmest day looks like 8 October (75.6°), the coolest 11 October (37.9°).
63.2°/45.2°
Average high / low
+1.9°
Above normal
3 / 8
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
60.9°
60.9°
+0°
17 October – 26 October
67.1°
57.4°
+5.4°
27 October – 5 November
at normal
53.4°
—
October records over 66 years
88.2°1 October 1987All-time high
16.3°28 October 1971All-time low
Thu, 0876° / 51°0
76 °
Startup, Thursday, 8 October
Overcast. High 76°, low 51°.
Pressure30.03 inHg
Wind2.9 mph SW
Humidity57%
Visibility3.6 mi
Dew point49°
Fri, 0956° / 47°0.62
56 °
Startup, Friday, 9 October
Heavy rain. High 56°, low 47°.
Pressure29.77 inHg
Wind4.3 mph W
Humidity94%
Visibility6.2 mi
Dew point49°
Sat, 1053° / 41°0.02
53 °
Startup, Saturday, 10 October
Light rain. High 53°, low 41°.
Pressure29.85 inHg
Wind4.1 mph W
Humidity68%
Visibility6.2 mi
Dew point42°
Sun, 1156° / 38°0
56 °
Startup, Sunday, 11 October
Clear. High 56°, low 38°.
Pressure30.09 inHg
Wind6.7 mph W
Humidity58%
Visibility—
Dew point37°
Mon, 1259° / 38°0
59 °
Startup, Monday, 12 October
Clear. High 59°, low 38°.
Pressure30.09 inHg
Wind4.9 mph E
Humidity43%
Visibility—
Dew point31°
Tue, 1362° / 45°0.41
62 °
Startup, Tuesday, 13 October
Rain. High 62°, low 45°.
Pressure29.88 inHg
Wind6.5 mph W
Humidity41%
Visibility—
Dew point34°
Wed, 1449° / 44°0.35
49 °
Startup, Wednesday, 14 October
Rain. High 49°, low 44°.
Pressure30.00 inHg
Wind5.7 mph SW
Humidity91%
Visibility—
Dew point46°
Thu, 1560° / 41°0
60 °
Startup, Thursday, 15 October
Clear. High 60°, low 41°.
Pressure30.33 inHg
Wind5.1 mph E
Humidity70%
Visibility—
Dew point42°
Fri, 1668° / 43°0
68 °
Startup, Friday, 16 October
Clear. High 68°, low 43°.
Pressure30.24 inHg
Wind6.2 mph E
Humidity40%
Visibility—
Dew point34°
Sat, 1770° / 45°0
70 °
Startup, Saturday, 17 October
Clear. High 70°, low 45°.
Pressure29.97 inHg
Wind6.1 mph E
Humidity36%
Visibility—
Dew point33°
Sun, 1871° / 46°0
71 °
Startup, Sunday, 18 October
Clear. High 71°, low 46°.
Pressure29.94 inHg
Wind5.9 mph E
Humidity33%
Visibility—
Dew point32°
Mon, 1964° / 47°0
64 °
Startup, Monday, 19 October
Clear. High 64°, low 47°.
Pressure30.03 inHg
Wind5.2 mph E
Humidity43%
Visibility—
Dew point37°
Tue, 2066° / 46°0
66 °
Startup, Tuesday, 20 October
Clear. High 66°, low 46°.
Pressure30.18 inHg
Wind4.8 mph E
Humidity42%
Visibility—
Dew point36°
Wed, 2164° / 49°0
64 °
Startup, Wednesday, 21 October
Overcast. High 64°, low 49°.
Pressure30.12 inHg
Wind4.2 mph E
Humidity41%
Visibility—
Dew point37°
Thu, 2268° / 51°0
68 °
Startup, Thursday, 22 October
Overcast. High 68°, low 51°.
Pressure29.97 inHg
Wind5 mph E
Humidity37%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2358° / 44°0.26
58 °
Startup, Friday, 23 October
Climate normal for this date — 60-year average.
Average high58°
Average low44°
Average precipitation0.26 in
Chance of precipitation52%
Record high75° (1965)
Record low35° (1984)
Sat, 2457° / 44°0.29
57 °
Startup, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.29 in
Chance of precipitation57%
Record high74° (1965)
Record low36° (2008)
Sun, 2556° / 43°0.34
56 °
Startup, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.34 in
Chance of precipitation62%
Record high72° (1965)
Record low31° (1969)
Mon, 2655° / 43°0.41
55 °
Startup, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.41 in
Chance of precipitation58%
Record high73° (1965)
Record low24° (1970)
Tue, 2755° / 42°0.32
55 °
Startup, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.32 in
Chance of precipitation58%
Record high69° (2017)
Record low20° (1971)
Wed, 2854° / 42°0.39
54 °
Startup, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.39 in
Chance of precipitation58%
Record high73° (1962)
Record low16° (1971)
Thu, 2954° / 41°0.26
54 °
Startup, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.26 in
Chance of precipitation60%
Record high73° (1962)
Record low20° (1971)
Fri, 3053° / 41°0.36
53 °
Startup, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.36 in
Chance of precipitation55%
Record high63° (1993)
Record low17° (1972)
Sat, 3153° / 42°0.41
53 °
Startup, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.41 in
Chance of precipitation70%
Record high65° (1988)
Record low28° (2006)
Sun, 0153° / 41°0.39
53 °
Startup, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.39 in
Chance of precipitation60%
Record high68° (1981)
Record low29° (1973)
Mon, 0253° / 41°0.29
53 °
Startup, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.29 in
Chance of precipitation55%
Record high70° (1962)
Record low22° (1973)
Tue, 0353° / 41°0.39
53 °
Startup, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.39 in
Chance of precipitation60%
Record high67° (2010)
Record low24° (1973)
Wed, 0453° / 42°0.52
53 °
Startup, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.52 in
Chance of precipitation63%
Record high69° (2010)
Record low29° (2003)
Thu, 0552° / 40°0.33
52 °
Startup, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.33 in
Chance of precipitation63%
Record high67° (1997)
Record low15° (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 Startup, 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 Startup, 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.