Koloa, HI climate
Koloa has warm winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 66°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Koloa feels like
Winter
Spring
Summer
Fall
Koloa 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 | 79° | 66° | 2.8" | 0 | 12 | 0 |
| February | 78° | 66° | 3.6" | 0 | 13 | 0 |
| March | 79° | 67° | 5.6" | 0 | 15 | 0 |
| April | 80° | 70° | 2.0" | 0 | 16 | 0 |
| May | 82° | 71° | 2.2" | 0 | 14 | 0 |
| June | 83° | 73° | 1.8" | 0 | 18 | 0 |
| July | 85° | 75° | 1.8" | 0 | 19 | 0 |
| August | 85° | 75° | 2.3" | 0 | 18 | 0 |
| September | 85° | 75° | 2.2" | 0 | 16 | 0 |
| October | 84° | 74° | 3.3" | 0 | 17 | 0 |
| November | 81° | 71° | 4.0" | 0 | 18 | 0 |
| December | 79° | 69° | 4.6" | 0 | 18 | 0 |
| Year | 82° | 71° | 36.2" | 0.0" | 193 | 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 Koloa
Koloa gets 36 inches of rain and melted snow a year. March is the wettest month and July the driest. Rain or snow falls on about 193 days a year.
A year-round growing season
Heating and cooling a home in Koloa
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Koloa, 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.
Koloa and its neighbors
Koloa borders 2 towns with climate data. January nights across them vary by 0.0°. Poipu has both the coldest January nights (66°) and the hottest July afternoons (85°). Koloa’s January low is 66° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Koloa compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Koloa’s climate
What is the coldest month in Koloa?
January, with a typical high of 79° and a low of 66°.
What is the hottest month in Koloa?
September, with a typical high of 85° and a low of 75°.
How much snow does Koloa get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Koloa?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Koloa?
March, with 5.6 inches of rain and melted snow. The year totals 36 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 Lihue WSO Airport 1020.1, HI (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.