Kailua has warm winters and warm summers, with very little rain
A typical July afternoon reaches 86°, a January night drops to 69°, and snow is almost unheard of.
A year in Kailua at a glance
Each month’s typical high and low, and what it brings.
What stands out about Kailua’s climate
Read from where Kailua sits among Hawaii’s towns. The page puts what stands out first.
Rain and snow in Kailua
January is the wettest month and July the driest. Rain or snow falls on about 135 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
No measurable snow in a normal year.
What a year in Kailua feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A year-round growing season
Freezing nights are uncommon in Kailua.
90° days by month
Average days at 90° or more
Living with Kailua’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
Only 0% of years see a freezing night, so tender plants can stay out most winters.
About 0.0" in a normal winter.
About 3 days a year reach 90°, and July afternoons average 86°.
The nicest months are January, February, March, April, May and December. 5.0 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Kailua and its neighbors
Holualoa has the coldest January nights next door (69°) and Holualoa the hottest July afternoons (86°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
How Kailua compares
Against every U.S. town on TownTapestry, each counted once, with its place in Hawaii.
Kailua 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° | 69° | 1.4" | 0 | 6 | 0 |
| February | 82° | 68° | 1.2" | 0 | 6 | 0 |
| March | 82° | 70° | 1.0" | 0 | 10 | 0 |
| April | 83° | 71° | 0.6" | 0 | 12 | 0 |
| May | 84° | 73° | 0.6" | 0 | 15 | 0 |
| June | 85° | 74° | 0.8" | 0 | 19 | 0 |
| July | 86° | 75° | 0.5" | 0 | 17 | 0 |
| August | 87° | 76° | 0.5" | 0 | 13 | 0 |
| September | 87° | 75° | 0.5" | 0 | 12 | 0 |
| October | 86° | 75° | 0.9" | 0 | 11 | 0 |
| November | 84° | 72° | 0.8" | 0 | 8 | 0 |
| December | 82° | 70° | 1.1" | 0 | 6 | 0 |
| Year | 84° | 72° | 9.9" | 0.0" | 135 | 0 |
Heating and cooling a home in Kailua
0% of the work is heating, so air conditioning is the bigger bill.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
Common questions about Kailua’s climate
What is the coldest month in Kailua?
February, with a typical high of 82° and a low of 68°.
What is the hottest month in Kailua?
August, with a typical high of 87° and a low of 76°. About 3 days a year reach 90°.
How much snow does Kailua get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Kailua?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Kailua?
January, with 1.4 inches of rain and melted snow. The year totals 10 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Kailua.
Your answer becomes a post in Town Square.
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 Lanihau 68.2, HI (3 mi, snow) and Ke-ahole Pt 68.13, HI (7 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Today’s forecast: National Weather Service.