Monthly outlook for Onslow, WA: average high 56.8°, average low 46.6°. That is 0.4° above the climate normal for October. Precipitation is expected on 7 days (about 3.5 inches), against a normal of 8 days and 5.5 inches. The warmest day looks like 8 October (68.6°), the coolest 12 October (38.7°).
56.8°/46.6°
Average high / low
+0.4°
Above normal
7 / 8
Wet days / normal
3.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
58.6°
56.6°
+1.1°
18 October – 27 October
53.7°
54.4°
-0.4°
28 October – 6 November
at normal
52.2°
—
October records over 66 years
76.3°15 October 2022All-time high
26.8°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Santiago (10 mi).
Fri, 0961° / 50°0.1
61 °
Onslow, Friday, 9 October
Rain. High 61°, low 50°.
Pressure29.91 inHg
Wind18.8 mph NW
Humidity69%
Visibility6.2 mi
Dew point46°
Sat, 1057° / 47°0.01
57 °
Onslow, Saturday, 10 October
Light rain. High 57°, low 47°.
Pressure29.83 inHg
Wind3.2 mph E
Humidity63%
Visibility6.2 mi
Dew point44°
Sun, 1156° / 41°0
56 °
Onslow, Sunday, 11 October
Clear. High 56°, low 41°.
Pressure30.00 inHg
Wind3 mph W
Humidity63%
Visibility6.2 mi
Dew point43°
Mon, 1257° / 39°0
57 °
Onslow, Monday, 12 October
Clear. High 57°, low 39°.
Pressure30.03 inHg
Wind5.8 mph E
Humidity56%
Visibility—
Dew point39°
Tue, 1356° / 41°0.57
56 °
Onslow, Tuesday, 13 October
Rain. High 56°, low 41°.
Pressure29.91 inHg
Wind18.6 mph NW
Humidity66%
Visibility—
Dew point43°
Wed, 1455° / 47°0.07
55 °
Onslow, Wednesday, 14 October
Light rain. High 55°, low 47°.
Pressure29.94 inHg
Wind23.3 mph NW
Humidity69%
Visibility—
Dew point45°
Thu, 1557° / 45°0
57 °
Onslow, Thursday, 15 October
Clear. High 57°, low 45°.
Pressure30.33 inHg
Wind8.3 mph E
Humidity59%
Visibility—
Dew point41°
Fri, 1659° / 47°0
59 °
Onslow, Friday, 16 October
Overcast. High 59°, low 47°.
Pressure30.27 inHg
Wind12.1 mph E
Humidity56%
Visibility—
Dew point42°
Sat, 1758° / 51°0
58 °
Onslow, Saturday, 17 October
Overcast. High 58°, low 51°.
Pressure30.27 inHg
Wind6.8 mph NW
Humidity75%
Visibility—
Dew point49°
Sun, 1857° / 49°0
57 °
Onslow, Sunday, 18 October
Overcast. High 57°, low 49°.
Pressure30.21 inHg
Wind7.4 mph NW
Humidity66%
Visibility—
Dew point44°
Mon, 1955° / 47°0
55 °
Onslow, Monday, 19 October
Overcast. High 55°, low 47°.
Pressure30.21 inHg
Wind10.1 mph NW
Humidity75%
Visibility—
Dew point46°
Tue, 2055° / 50°1.48
55 °
Onslow, Tuesday, 20 October
Heavy rain. High 55°, low 50°.
Pressure30.09 inHg
Wind17.9 mph S
Humidity85%
Visibility—
Dew point49°
Wed, 2155° / 50°0.06
55 °
Onslow, Wednesday, 21 October
Light rain. High 55°, low 50°.
Pressure29.91 inHg
Wind21.2 mph NW
Humidity67%
Visibility—
Dew point44°
Thu, 2250° / 43°1.13
50 °
Onslow, Thursday, 22 October
Rain. High 50°, low 43°.
Pressure29.29 inHg
Wind25.7 mph E
Humidity85%
Visibility—
Dew point44°
Fri, 2351° / 46°0.08
51 °
Onslow, Friday, 23 October
Light rain. High 51°, low 46°.
Pressure29.74 inHg
Wind10.8 mph NW
Humidity75%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2454° / 46°0.37
54 °
Onslow, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low46°
Average precipitation0.37 in
Chance of precipitation58%
Record high68° (1965)
Record low37° (1961)
Sun, 2553° / 46°0.49
53 °
Onslow, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low46°
Average precipitation0.49 in
Chance of precipitation63%
Record high65° (1965)
Record low36° (2020)
Mon, 2654° / 45°0.43
54 °
Onslow, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low45°
Average precipitation0.43 in
Chance of precipitation60%
Record high66° (1965)
Record low33° (2020)
Tue, 2753° / 45°0.35
53 °
Onslow, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.35 in
Chance of precipitation58%
Record high68° (2017)
Record low31° (2023)
Wed, 2852° / 45°0.51
52 °
Onslow, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.51 in
Chance of precipitation65%
Record high65° (1962)
Record low29° (2023)
Thu, 2953° / 45°0.33
53 °
Onslow, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.33 in
Chance of precipitation57%
Record high65° (1962)
Record low29° (2023)
Fri, 3053° / 44°0.48
53 °
Onslow, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.48 in
Chance of precipitation62%
Record high61° (2017)
Record low27° (2019)
Sat, 3153° / 44°0.48
53 °
Onslow, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.48 in
Chance of precipitation63%
Record high63° (1966)
Record low30° (2019)
Sun, 0153° / 44°0.43
53 °
Onslow, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.43 in
Chance of precipitation53%
Record high64° (1969)
Record low30° (2019)
Mon, 0252° / 44°0.42
52 °
Onslow, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.42 in
Chance of precipitation65%
Record high65° (1970)
Record low33° (2019)
Tue, 0352° / 45°0.56
52 °
Onslow, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.56 in
Chance of precipitation62%
Record high66° (2010)
Record low35° (1994)
Wed, 0452° / 45°0.59
52 °
Onslow, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low45°
Average precipitation0.59 in
Chance of precipitation68%
Record high60° (1980)
Record low33° (1973)
Thu, 0551° / 44°0.44
51 °
Onslow, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.44 in
Chance of precipitation72%
Record high60° (1960)
Record low30° (1973)
Fri, 0651° / 44°0.61
51 °
Onslow, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.61 in
Chance of precipitation72%
Record high62° (1976)
Record low34° (1973)
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 Onslow, 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 Onslow, 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.