Ko Olina, HI climate
Ko Olina 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 Ko Olina feels like
Winter
Spring
Summer
Fall
Ko Olina 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 Ko Olina
Ko Olina 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 Ko Olina
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Ko Olina, 2% of that work is heating and 98% 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.
How Ko Olina compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Ko Olina’s climate
What is the coldest month in Ko Olina?
January, with a typical high of 81° and a low of 65°.
What is the hottest month in Ko Olina?
August, with a typical high of 89° and a low of 73°.
How much snow does Ko Olina get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Ko Olina?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Ko Olina?
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 (2 mi, snow) and Puu Manawahua 725.6, HI (3 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.