Royal Kunia, HI climate
Royal Kunia has warm winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 67°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Royal Kunia feels like
Winter
Spring
Summer
Fall
Royal Kunia 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° | 67° | 1.8" | 0 | 13 | 0 |
| February | 81° | 67° | 1.9" | 0 | 13 | 0 |
| March | 81° | 68° | 2.4" | 0 | 16 | 0 |
| April | 83° | 70° | 0.8" | 0 | 19 | 0 |
| May | 85° | 72° | 0.8" | 0 | 17 | 0 |
| June | 87° | 74° | 0.5" | 0 | 20 | 0 |
| July | 88° | 75° | 0.5" | 0 | 21 | 0 |
| August | 89° | 76° | 0.8" | 0 | 19 | 0 |
| September | 88° | 75° | 0.9" | 0 | 18 | 0 |
| October | 87° | 74° | 1.5" | 0 | 20 | 0 |
| November | 84° | 72° | 2.3" | 0 | 20 | 0 |
| December | 82° | 69° | 2.2" | 0 | 18 | 0 |
| Year | 85° | 71° | 16.4" | 0.0" | 214 | 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 Royal Kunia
Royal Kunia gets 16 inches of rain and melted snow a year. March is the wettest month and June the driest. Rain or snow falls on about 214 days a year.
A year-round growing season
Heating and cooling a home in Royal Kunia
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Royal Kunia, 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.
Royal Kunia and its neighbors
Royal Kunia borders 1 town with climate data. January nights across them vary by 0.0°. Waipahu has both the coldest January nights (67°) and the hottest July afternoons (88°). Royal Kunia’s January low is 67° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Royal Kunia compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Royal Kunia’s climate
What is the coldest month in Royal Kunia?
January, with a typical high of 81° and a low of 67°.
What is the hottest month in Royal Kunia?
August, with a typical high of 89° and a low of 76°. About 32 days a year reach 90°.
How much snow does Royal Kunia get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Royal Kunia?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Royal Kunia?
March, with 2.4 inches of rain and melted snow. The year totals 16 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 Aiea Hts 764.6, HI (8 mi, snow) and Honolulu Intl Airport, HI (9 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.