Waialua, HI climate
Waialua has warm winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 63°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade3° warmer than normal today. The forecast high is 87°, and a typical Oct 1 in Waialua peaks around 84°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Waialua feels like
Winter
Spring
Summer
Fall
Waialua 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 | 76° | 63° | 4.8" | 0 | 19 | 0 |
| February | 76° | 62° | 2.8" | 0 | 17 | 0 |
| March | 76° | 63° | 4.5" | 0 | 21 | 0 |
| April | 79° | 64° | 2.4" | 0 | 21 | 0 |
| May | 80° | 66° | 1.8" | 0 | 19 | 0 |
| June | 84° | 68° | 1.2" | 0 | 23 | 0 |
| July | 85° | 69° | 1.1" | 0 | 24 | 0 |
| August | 86° | 70° | 1.5" | 0 | 23 | 0 |
| September | 85° | 70° | 1.3" | 0 | 21 | 0 |
| October | 83° | 69° | 2.6" | 0 | 23 | 0 |
| November | 79° | 67° | 3.4" | 0 | 24 | 0 |
| December | 77° | 65° | 5.6" | 0 | 25 | 0 |
| Year | 80° | 66° | 33.0" | 0.0" | 260 | 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 Waialua
Waialua gets 33 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 260 days a year.
A year-round growing season
Heating and cooling a home in Waialua
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Waialua, 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.
Waialua and its neighbors
Waialua borders 2 towns with climate data. January nights across them vary by 0.2°. Haleiwa has both the coldest January nights (62°) and the hottest July afternoons (85°). Waialua’s January low is 63° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Waialua compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Waialua’s climate
What is the coldest month in Waialua?
February, with a typical high of 76° and a low of 62°.
What is the hottest month in Waialua?
August, with a typical high of 86° and a low of 70°. About 7 days a year reach 90°.
How much snow does Waialua get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Waialua?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Waialua?
December, with 5.6 inches of rain and melted snow. The year totals 33 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 Waimea Valley 892.2, HI (6 mi, snow) and Poamoho Exp Fm 855.2, 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.