Waianae, HI climate
Waianae has warm winters and warm summers, with very little rain. A typical July afternoon reaches 85°, a January night drops to 65°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Waianae feels like
Winter
Spring
Summer
Fall
Waianae 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° | 65° | 3.2" | 0 | 7 | 0 |
| February | 78° | 64° | 2.3" | 0 | 7 | 0 |
| March | 79° | 65° | 2.7" | 0 | 6 | 0 |
| April | 80° | 66° | 1.4" | 0 | 4 | 0 |
| May | 82° | 68° | 1.6" | 0 | 4 | 0 |
| June | 83° | 69° | 0.8" | 0 | 4 | 0 |
| July | 85° | 70° | 0.5" | 0 | 4 | 0 |
| August | 86° | 70° | 0.7" | 0 | 4 | 0 |
| September | 85° | 70° | 0.9" | 0 | 5 | 0 |
| October | 85° | 70° | 1.9" | 0 | 5 | 0 |
| November | 82° | 69° | 2.5" | 0 | 6 | 0 |
| December | 80° | 67° | 3.2" | 0 | 6 | 0 |
| Year | 82° | 68° | 21.8" | 0.0" | 60 | 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 Waianae
Waianae gets 22 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 60 days a year.
A year-round growing season
Heating and cooling a home in Waianae
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Waianae, 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.
Waianae and its neighbors
Waianae borders 3 towns with climate data. January nights across them vary by 0.0°. Makaha has both the coldest January nights (65°) and the hottest July afternoons (85°). Waianae’s January low is 65° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Waianae compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Waianae’s climate
What is the coldest month in Waianae?
February, with a typical high of 78° and a low of 64°.
What is the hottest month in Waianae?
August, with a typical high of 86° and a low of 70°. About 1 days a year reach 90°.
How much snow does Waianae get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Waianae?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Waianae?
December, with 3.2 inches of rain and melted snow. The year totals 22 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 Waianae 798, HI (1 mi, snow) and Makaha Ctry Club 800.3, 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.