Monthly outlook for Waipahu, HI: average high 80.8°, average low 76.3°. That is 1° below the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 15 October (82.4°), the coolest 23 October (75°).
80.8°/76.3°
Average high / low
−1°
Below normal
1 / 4
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
81.2°
82.9°
-0.9°
25 October – 3 November
80.1°
82°
-1.1°
4 November – 13 November
at normal
81.3°
—
October records over 66 years
89.8°1 October 2024All-time high
67.8°26 October 2017All-time low
Fri, 1682° / 76°0
82 °
Waipahu, Friday, 16 October
Partly cloudy. High 82°, low 76°.
Pressure30.00 inHg
Wind12.5 mph NE
Humidity66%
Visibility6.2 mi
Dew point69°
Sat, 1781° / 77°0
81 °
Waipahu, Saturday, 17 October
Clear. High 81°, low 77°.
Pressure30.03 inHg
Wind15.1 mph NE
Humidity65%
Visibility6.2 mi
Dew point67°
Sun, 1881° / 76°0
81 °
Waipahu, Sunday, 18 October
Clear. High 81°, low 76°.
Pressure30.03 inHg
Wind13.9 mph E
Humidity61%
Visibility6.2 mi
Dew point66°
Mon, 1982° / 76°0
82 °
Waipahu, Monday, 19 October
Clear. High 82°, low 76°.
Pressure30.03 inHg
Wind10.2 mph E
Humidity63%
Visibility6.2 mi
Dew point67°
Tue, 2081° / 76°0
81 °
Waipahu, Tuesday, 20 October
Partly cloudy. High 81°, low 76°.
Pressure30.06 inHg
Wind17.9 mph E
Humidity69%
Visibility—
Dew point68°
Wed, 2181° / 76°0
81 °
Waipahu, Wednesday, 21 October
Light rain. High 81°, low 76°.
Pressure30.00 inHg
Wind13.9 mph E
Humidity61%
Visibility—
Dew point65°
Thu, 2281° / 76°0
81 °
Waipahu, Thursday, 22 October
Overcast. High 81°, low 76°.
Pressure29.97 inHg
Wind10.6 mph NE
Humidity59%
Visibility—
Dew point64°
Fri, 2380° / 75°0.02
80 °
Waipahu, Friday, 23 October
Light rain. High 80°, low 75°.
Pressure29.97 inHg
Wind8.8 mph E
Humidity62%
Visibility—
Dew point65°
Sat, 2481° / 76°0.01
81 °
Waipahu, Saturday, 24 October
Light rain. High 81°, low 76°.
Pressure30.00 inHg
Wind13.2 mph E
Humidity70%
Visibility—
Dew point69°
Sun, 2582° / 77°0
82 °
Waipahu, Sunday, 25 October
Overcast. High 82°, low 77°.
Pressure30.00 inHg
Wind14.1 mph E
Humidity67%
Visibility—
Dew point68°
Mon, 2681° / 77°0
81 °
Waipahu, Monday, 26 October
Overcast. High 81°, low 77°.
Pressure30.03 inHg
Wind16.6 mph E
Humidity67%
Visibility—
Dew point69°
Tue, 2780° / 75°0.01
80 °
Waipahu, Tuesday, 27 October
Light rain. High 80°, low 75°.
Pressure30.06 inHg
Wind18.4 mph NE
Humidity58%
Visibility—
Dew point62°
Wed, 2878° / 76°0.03
78 °
Waipahu, Wednesday, 28 October
Light rain. High 78°, low 76°.
Pressure30.03 inHg
Wind24 mph NE
Humidity70%
Visibility—
Dew point67°
Thu, 2979° / 77°0
79 °
Waipahu, Thursday, 29 October
Light rain. High 79°, low 77°.
Pressure29.91 inHg
Wind20.6 mph NE
Humidity69%
Visibility—
Dew point68°
Fri, 3080° / 76°0.2
80 °
Waipahu, Friday, 30 October
Light rain. High 80°, low 76°.
Pressure29.91 inHg
Wind12.1 mph E
Humidity70%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3182° / 75°0.06
82 °
Waipahu, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.06 in
Chance of precipitation25%
Record high87° (2025)
Record low69° (2023)
Sun, 0182° / 75°0.06
82 °
Waipahu, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.06 in
Chance of precipitation22%
Record high88° (2025)
Record low69° (2023)
Mon, 0282° / 74°0.12
82 °
Waipahu, Monday, 2 November
Climate normal for this date — 60-year average.
Average high82°
Average low74°
Average precipitation0.12 in
Chance of precipitation28%
Record high86° (2020)
Record low69° (1976)
Tue, 0382° / 74°0.05
82 °
Waipahu, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high82°
Average low74°
Average precipitation0.05 in
Chance of precipitation27%
Record high89° (2023)
Record low71° (1992)
Wed, 0482° / 75°0.1
82 °
Waipahu, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.1 in
Chance of precipitation20%
Record high88° (2025)
Record low69° (1992)
Thu, 0582° / 75°0.09
82 °
Waipahu, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.09 in
Chance of precipitation27%
Record high86° (2019)
Record low71° (2012)
Fri, 0682° / 75°0.07
82 °
Waipahu, Friday, 6 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.07 in
Chance of precipitation33%
Record high88° (2019)
Record low70° (1985)
Sat, 0782° / 75°0.05
82 °
Waipahu, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.05 in
Chance of precipitation30%
Record high87° (2025)
Record low71° (2017)
Sun, 0882° / 75°0.04
82 °
Waipahu, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high82°
Average low75°
Average precipitation0.04 in
Chance of precipitation27%
Record high86° (2020)
Record low71° (2025)
Mon, 0981° / 74°0.03
81 °
Waipahu, Monday, 9 November
Climate normal for this date — 60-year average.
Average high81°
Average low74°
Average precipitation0.03 in
Chance of precipitation28%
Record high87° (2023)
Record low68° (2019)
Tue, 1081° / 74°0.02
81 °
Waipahu, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high81°
Average low74°
Average precipitation0.02 in
Chance of precipitation18%
Record high86° (2019)
Record low69° (2021)
Wed, 1181° / 74°0.06
81 °
Waipahu, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high81°
Average low74°
Average precipitation0.06 in
Chance of precipitation17%
Record high86° (2019)
Record low70° (2018)
Thu, 1281° / 74°0.06
81 °
Waipahu, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high81°
Average low74°
Average precipitation0.06 in
Chance of precipitation22%
Record high85° (2023)
Record low71° (1965)
Fri, 1381° / 74°0.06
81 °
Waipahu, Friday, 13 November
Climate normal for this date — 60-year average.
Average high81°
Average low74°
Average precipitation0.06 in
Chance of precipitation30%
Record high86° (2019)
Record low71° (2005)
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 Waipahu, 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 Waipahu, 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.