Monthly outlook for Waiau, HI: average high 78.9°, average low 71.9°. That is 1.2° below the climate normal for October. Precipitation is expected on 11 days (about 4.9 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 26 October (84.9°), the coolest 26 October (69.2°).
78.9°/71.9°
Average high / low
−1.2°
Below normal
11 / 5
Wet days / normal
4.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
79.3°
81.2°
-1.1°
3 November – 12 November
78.2°
80.4°
-1.3°
13 November – 22 November
at normal
79.4°
—
October records over 66 years
90°1 October 2020All-time high
66°4 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Waimalu (1 mi).
Sun, 2583° / 71°0
83 °
Waiau, Sunday, 25 October
Light rain. High 83°, low 71°.
Pressure29.94 inHg
Wind6.4 mph NE
Humidity50%
Visibility6.2 mi
Dew point61°
Mon, 2685° / 69°0
85 °
Waiau, Monday, 26 October
Overcast. High 85°, low 69°.
Pressure29.91 inHg
Wind1.6 mph E
Humidity45%
Visibility6.2 mi
Dew point59°
Tue, 2778° / 70°1.28
78 °
Waiau, Tuesday, 27 October
Heavy rain. High 78°, low 70°.
Pressure29.91 inHg
Wind4.2 mph NE
Humidity79%
Visibility6.2 mi
Dew point67°
Wed, 2875° / 71°2.7
75 °
Waiau, Wednesday, 28 October
Heavy rain. High 75°, low 71°.
Pressure29.91 inHg
Wind5 mph E
Humidity97%
Visibility—
Dew point73°
Thu, 2977° / 74°0.2
77 °
Waiau, Thursday, 29 October
Light rain. High 77°, low 74°.
Pressure29.91 inHg
Wind8.6 mph N
Humidity94%
Visibility—
Dew point74°
Fri, 3079° / 75°0.19
79 °
Waiau, Friday, 30 October
Light rain. High 79°, low 75°.
Pressure29.97 inHg
Wind6.1 mph NE
Humidity89%
Visibility—
Dew point74°
Sat, 3178° / 74°0.04
78 °
Waiau, Saturday, 31 October
Light rain. High 78°, low 74°.
Pressure30.03 inHg
Wind11 mph E
Humidity83%
Visibility—
Dew point72°
Sun, 0179° / 73°0.01
79 °
Waiau, Sunday, 1 November
Light rain. High 79°, low 73°.
Pressure30.09 inHg
Wind13 mph NE
Humidity66%
Visibility—
Dew point65°
Mon, 0277° / 72°0.14
77 °
Waiau, Monday, 2 November
Light rain. High 77°, low 72°.
Pressure30.09 inHg
Wind14.9 mph NE
Humidity70%
Visibility—
Dew point66°
Tue, 0378° / 72°0.06
78 °
Waiau, Tuesday, 3 November
Light rain. High 78°, low 72°.
Pressure30.12 inHg
Wind17.9 mph E
Humidity70%
Visibility—
Dew point66°
Wed, 0478° / 72°0.06
78 °
Waiau, Wednesday, 4 November
Light rain. High 78°, low 72°.
Pressure30.09 inHg
Wind13.2 mph NE
Humidity72%
Visibility—
Dew point68°
Thu, 0581° / 72°0.07
81 °
Waiau, Thursday, 5 November
Light rain. High 81°, low 72°.
Pressure30.06 inHg
Wind7.6 mph NE
Humidity67%
Visibility—
Dew point68°
Fri, 0679° / 71°0.02
79 °
Waiau, Friday, 6 November
Light rain. High 79°, low 71°.
Pressure30.06 inHg
Wind8.6 mph NE
Humidity69%
Visibility—
Dew point66°
Sat, 0774° / 70°0.06
74 °
Waiau, Saturday, 7 November
Light rain. High 74°, low 70°.
Pressure30.12 inHg
Wind10 mph NE
Humidity89%
Visibility—
Dew point69°
Sun, 0878° / 73°0.09
78 °
Waiau, Sunday, 8 November
Light rain. High 78°, low 73°.
Pressure30.12 inHg
Wind9.9 mph E
Humidity73%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0980° / 73°0.03
80 °
Waiau, Monday, 9 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.03 in
Chance of precipitation28%
Record high85° (2023)
Record low67° (2019)
Tue, 1080° / 73°0.03
80 °
Waiau, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.03 in
Chance of precipitation22%
Record high87° (2019)
Record low68° (2021)
Wed, 1180° / 73°0.07
80 °
Waiau, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.07 in
Chance of precipitation23%
Record high84° (2019)
Record low67° (2021)
Thu, 1280° / 73°0.06
80 °
Waiau, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.06 in
Chance of precipitation23%
Record high85° (2019)
Record low70° (2021)
Fri, 1380° / 73°0.06
80 °
Waiau, Friday, 13 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.06 in
Chance of precipitation35%
Record high86° (2019)
Record low69° (2021)
Sat, 1480° / 73°0.1
80 °
Waiau, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.1 in
Chance of precipitation30%
Record high86° (2019)
Record low68° (2018)
Sun, 1580° / 73°0.09
80 °
Waiau, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high80°
Average low73°
Average precipitation0.09 in
Chance of precipitation33%
Record high86° (2019)
Record low67° (2025)
Mon, 1679° / 73°0.04
79 °
Waiau, Monday, 16 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.04 in
Chance of precipitation33%
Record high84° (2019)
Record low68° (2025)
Tue, 1779° / 73°0.06
79 °
Waiau, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.06 in
Chance of precipitation27%
Record high84° (2021)
Record low68° (1974)
Wed, 1879° / 72°0.19
79 °
Waiau, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high79°
Average low72°
Average precipitation0.19 in
Chance of precipitation22%
Record high85° (2021)
Record low65° (2017)
Thu, 1979° / 73°0.14
79 °
Waiau, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.14 in
Chance of precipitation32%
Record high85° (2019)
Record low65° (2017)
Fri, 2079° / 73°0.09
79 °
Waiau, Friday, 20 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.09 in
Chance of precipitation33%
Record high85° (2021)
Record low64° (2017)
Sat, 2179° / 73°0.05
79 °
Waiau, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.05 in
Chance of precipitation28%
Record high83° (2022)
Record low63° (2017)
Sun, 2279° / 73°0.06
79 °
Waiau, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high79°
Average low73°
Average precipitation0.06 in
Chance of precipitation40%
Record high83° (2025)
Record low64° (2024)
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 Waiau, HI 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 Waiau, HI 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.