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CheckWeather USWaipahu

Waipahu weather

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Waipahu weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Waipahu weather in numbers

from 30 years of measured normals

Waipahu swings 20°F across the year, from 88°F highs in August to 68°F lows in January, and May is usually the wettest month in a year that brings about 19 in of precipitation.

Warmest month
August
88°F average high
Coldest month
January
68°F average low
Wettest month
May
19 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
Rarely
highs outside 60-78°F
Residents
38,000
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The weather map: all three models at once

NWS, American, European side by side around Waipahu and nearby towns.Live rain radar →
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Waipahu hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Waipahu 10-day forecast, out to 14 days

where the models agree, and where they split

Waipahu, Hawaii (HI) is at its warmest in Aug (average highs near 88°F) and coldest in Jan (lows around 68°F), with roughly 19 in of precipitation across the year. Below, compare what NWS, American, European forecast for Waipahu right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Waipahu climate by month

average daytime high and overnight low across a typical year
Jan
79°
68°
Feb
79°
69°
Mar
80°
69°
Apr
81°
70°
May
82°
71°
Jun
85°
73°
Jul
87°
74°
Aug
88°
75°
Sep
88°
74°
Oct
86°
73°
Nov
84°
72°
Dec
81°
69°

Which forecast is most accurate in Waipahu?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
American logo
American ★ Best
77
/100rank #1
75±2.5°F87±4.0 mph7184% hitNOAA / NCEP (United States)College Park, Maryland, USA
European logo
European
45
/100rank #2
57±4.3°F88±3.8 mph045% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Waipahu today?
On this page we show what NWS, American, European each forecast for Waipahu today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Waipahu today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Waipahu and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Waipahu?
Over the last 30 days, the American model has been the most accurate for Waipahu (CheckWeather Score 77/100), ahead of the European at 45. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Waipahu?
August is typically the warmest month in Waipahu, with average highs around 88°F.
How cold does Waipahu get?
The coldest month in Waipahu is January, when overnight lows average about 68°F.
How much rain does Waipahu get?
Waipahu sees roughly 19 in of precipitation a year, with May usually the wettest month.

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