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CheckWeather USHawai'i Kai

Hawai'i Kai weather

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The weather map: all three models at once

NWS, American, European side by side around Hawai'i Kai and nearby towns.Live rain radar →
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Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split

Hawai'i Kai, HI is at its warmest in Sep (average highs near 83°F) and coldest in Jan (lows around 68°F), with roughly 35 in of precipitation across the year. Below, compare what NWS, American, European forecast for Hawai'i Kai 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.

Hawai'i Kai climate by month

average daytime high and overnight low across a typical year
Jan
77°
68°
Feb
76°
69°
Mar
77°
69°
Apr
77°
70°
May
78°
71°
Jun
80°
73°
Jul
81°
74°
Aug
82°
75°
Sep
83°
75°
Oct
83°
74°
Nov
79°
73°
Dec
78°
70°

Which forecast is most accurate in Hawai'i Kai?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
American logo
American ★ Best
70
/100rank #1
70±3.0°F92±2.6 mph5374% hitNOAA / NCEP (United States)College Park, Maryland, USA
European logo
European
61
/100rank #2
59±4.1°F89±3.5 mph4268% 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.

Common questions

What's the weather in Hawai'i Kai today?
On this page we show what NWS, American, European each forecast for Hawai'i Kai 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 Hawai'i Kai today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Hawai'i Kai 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 Hawai'i Kai?
Over the last 30 days, the American model has been the most accurate for Hawai'i Kai (CheckWeather Score 70/100), ahead of the European at 61. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Hawai'i Kai?
September is typically the warmest month in Hawai'i Kai, with average highs around 83°F.
How cold does Hawai'i Kai get?
The coldest month in Hawai'i Kai is January, when overnight lows average about 68°F.
How much rain does Hawai'i Kai get?
Hawai'i Kai sees roughly 35 in of precipitation a year, with May usually the wettest month.

Nearby

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