Kapolei, HI climate
Kapolei has warm winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 65°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Kapolei feels like
Winter
Spring
Summer
Fall
Kapolei weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 81° | 65° | 1.4" | 0 | 7 | 0 |
| February | 81° | 65° | 1.8" | 0 | 6 | 0 |
| March | 82° | 66° | 2.0" | 0 | 8 | 0 |
| April | 84° | 68° | 0.6" | 0 | 5 | 0 |
| May | 85° | 69° | 1.0" | 0 | 6 | 0 |
| June | 87° | 71° | 0.3" | 0 | 4 | 0 |
| July | 88° | 73° | 0.3" | 0 | 5 | 0 |
| August | 89° | 73° | 0.6" | 0 | 6 | 0 |
| September | 89° | 72° | 0.7" | 0 | 6 | 0 |
| October | 87° | 72° | 1.3" | 0 | 7 | 0 |
| November | 84° | 69° | 1.8" | 0 | 8 | 0 |
| December | 82° | 67° | 2.3" | 0 | 8 | 0 |
| Year | 85° | 69° | 13.9" | 0.0" | 77 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more.
Rain and snow in Kapolei
Kapolei gets 14 inches of rain and melted snow a year. December is the wettest month and June the driest. Rain or snow falls on about 77 days a year.
A year-round growing season
Heating and cooling a home in Kapolei
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Kapolei, 0% of that work is heating and 100% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Kapolei and its neighbors
Kapolei borders 4 towns with climate data. January nights across them vary by 0.0°. East Kapolei has both the coldest January nights (65°) and the hottest July afternoons (88°). Kapolei’s January low is 65° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Kapolei compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Kapolei’s climate
What is the coldest month in Kapolei?
January, with a typical high of 81° and a low of 65°.
What is the hottest month in Kapolei?
August, with a typical high of 89° and a low of 73°. About 31 days a year reach 90°.
How much snow does Kapolei get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Kapolei?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Kapolei?
December, with 2.3 inches of rain and melted snow. The year totals 14 inches.
NOAA’s gridded normals don’t cover this state, so temperatures and rainfall come from the nearest weather station. Snow, frost dates and day counts come from NOAA’s weather station at Campbell Ind Pk 702.5, HI (4 mi, snow) and Ewa Kalaeloa Airport, HI (2 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.