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Captain Cook, HI Weather
Captain Cook, Hawaii sits at 19.4995, -155.8937. Its warmest month is October, when the day usually reaches 82F, and its coldest is January, when the night usually falls to 58F. June is the wettest, with rain on about 10 days. The hottest day in the station record is 95F on November 28, 1911, and the coldest night 43F on February 25, 1974. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Captain Cook weather
Captain Cook sits at 19.4995, -155.8937 and covers about 12.856 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Radar: NOAA MRMS merged reflectivity, rendered into tiles by myweatherrock.
Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
What the weather is usually like in Captain Cook
Captain Cook is warmest in October, when the day usually reaches 82F, and coldest in January, when the night usually falls to 58F. June is the wettest month, with rain on about 10 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
January
78F
58F
3
February
78F
59F
4
March
78F
60F
6
April
78F
61F
8
May
78F
62F
8
June
79F
64F
10
July
80F
64F
8
August
81F
65F
10
September
81F
64F
8
October
82F
64F
7
November
80F
62F
5
December
79F
60F
3
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Kealakekua 26.2 station 1.3 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Captain Cook weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Captain Cook: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Captain Cook weather records
In 49,661 days of observations Captain Cook has been as hot as 95F and as cold as 43F. Not averages: the actual days.
Hottest day
95F
November 28, 1911
Coldest night
43F
February 25, 1974
Wettest day
7.93 in
November 29, 2007
Biggest snow
4.5 in
December 5, 1958
NOAA GHCN daily station records, observed 1905 to 2026: temperature at the Kealakekua 26.2 station, 1.3 miles away; snowfall at the Mauna Loa Slope Obs 39 station, 20.8 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Captain Cook weather
Common questions
What is the weather usually like in Captain Cook, HI?
Captain Cook is warmest in October, when the day usually reaches 82F, and coldest in January, when the night usually falls to 58F. Rain falls on roughly 80 days a year, most often in June. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Captain Cook, HI?
About 80 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. June is the wettest month with rain on about 10 of its days, and January the driest with about 3.
What is the hottest it has ever been in Captain Cook, HI?
The hottest day measured for Captain Cook reached 95F on November 28, 1911, and the coldest night 43F on February 25, 1974. Both are real NOAA station measurements from the GHCN daily archive, observed 1905 to 2026, at the Kealakekua 26.2 station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Captain Cook, HI?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Captain Cook forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.