Kailua, Hawaii climate: Normal weather by month, frost dates and records
Kailua's normal year runs from 69°F January nights to 87°F August afternoons, with 9.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 25.7°C, January lows of 20°C, August highs of 31°C, 251 mm of precipitation a year.
- NOAA stationKailua Kona Ke-Ahole Airport
- Station IDUSW00021510
- Location19.74°N 156.05°W
- Elevation43 ft (13 m)
- Population (census place)21,851
On October 14, the normal high in Kailua is 86°F and the normal low 75°F, and the chance of measurable rain or snow is 13%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Kailua.
- Jan 81° 69°
- Feb 82° 68°
- Mar 82° 70°
- Apr 83° 71°
- May 84° 73°
- Jun 85° 74°
- Jul 86° 75°
- Aug 87° 76°
- Sep 87° 75°
- Oct 86° 75°
- Nov 84° 72°
- Dec 82° 70°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Kailua each month?
August is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 69°F. The most precipitation falls in January (1.35 in), the least in July (0.49 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 81°F | 69°F | 75.0°F | 1.35 | 3 | <1 | <1 | 11 h |
| February | 82°F | 68°F | 75.0°F | 1.17 | 3 | <1 | <1 | 11 h 30 min |
| March | 82°F | 70°F | 75.9°F | 0.97 | 5 | <1 | <1 | 12 h |
| April | 83°F | 71°F | 77.2°F | 0.63 | 4 | <1 | <1 | 12 h 30 min |
| May | 84°F | 73°F | 78.3°F | 0.64 | 6 | <1 | <1 | 13 h |
| June | 85°F | 74°F | 79.6°F | 0.76 | 5 | <1 | <1 | 13 h 20 min |
| July | 86°F | 75°F | 80.5°F | 0.49 | 4 | 1 | <1 | 13 h 10 min |
| August | 87°F | 76°F | 81.5°F | 0.54 | 5 | 2 | <1 | 12 h 50 min |
| September | 87°F | 75°F | 81.0°F | 0.54 | 5 | 2 | <1 | 12 h 20 min |
| October | 86°F | 75°F | 80.3°F | 0.89 | 4 | 1 | <1 | 11 h 40 min |
| November | 84°F | 72°F | 78.4°F | 0.83 | 3 | <1 | <1 | 11 h 10 min |
| December | 82°F | 70°F | 76.2°F | 1.06 | 4 | <1 | <1 | 11 h |
| Year (annual) | 84°F | 72°F | 78.2°F | 9.87 | 50 | 7 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 27°C | 20°C | 23.9°C | 34 mm |
| February | 28°C | 20°C | 23.9°C | 30 mm |
| March | 28°C | 21°C | 24.4°C | 25 mm |
| April | 28°C | 22°C | 25.1°C | 16 mm |
| May | 29°C | 23°C | 25.7°C | 16 mm |
| June | 30°C | 23°C | 26.4°C | 19 mm |
| July | 30°C | 24°C | 26.9°C | 12 mm |
| August | 31°C | 24°C | 27.5°C | 14 mm |
| September | 31°C | 24°C | 27.2°C | 14 mm |
| October | 30°C | 24°C | 26.8°C | 23 mm |
| November | 29°C | 22°C | 25.8°C | 21 mm |
| December | 28°C | 21°C | 24.6°C | 27 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00021510; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Kailua?
Normal highs sit between 65°F and 85°F in January, February, March, April, May, November and December. Of those, November has the fewest days with rain (3).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00021510.
How hot and how cold does it get in Kailua?
In a normal year in Kailua, 7 days a year reach 90°F, nights almost never fall to freezing and 50 days bring measurable precipitation.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- fewer than 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 50a normal year
The highest temperature in this station's record (since 1998) is 96°F, on September 25, 2015; the lowest is 60°F, on January 23, 2014.
The wettest calendar year on that record is 2004, with 21.76 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00021510; records: ACIS (NOAA Regional Climate Centers), station USW00021510. Records use complete months only; a month missing more than three days is left out.
How sunny is Kailua?
Over a year 88% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Kailua, 5.9 kWh per square metre a day. August is the sunniest month (90%) and March the cloudiest (83%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 89% | 4.8 |
| February | 86% | 5.3 |
| March | 83% | 5.8 |
| April | 86% | 6.6 |
| May | 87% | 6.8 |
| June | 87% | 6.9 |
| July | 89% | 7.0 |
| August | 90% | 6.9 |
| September | 90% | 6.4 |
| October | 88% | 5.6 |
| November | 87% | 4.8 |
| December | 87% | 4.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Kailua need?
A normal year in Kailua brings 0 heating degree days, 100% fewer than the median U.S. place (5,373), and 4,838 cooling degree days, 5.3 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 10,313 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 0 | 310 |
| February | 0 | 279 |
| March | 0 | 340 |
| April | 0 | 365 |
| May | 0 | 412 |
| June | 0 | 438 |
| July | 0 | 481 |
| August | 0 | 512 |
| September | 0 | 480 |
| October | 0 | 476 |
| November | 0 | 402 |
| December | 0 | 346 |
| Year (annual) | 0 | 4,838 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00021510. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Kailua been warmer than normal lately?
2025 averaged 79.0°F, 0.8°F above the 1991-2020 normal of 78.2°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.5°F | +0.3°F | 13.62 |
| 2023 | 78.6°F | +0.4°F | 8.66 |
| 2024 | 78.6°F | +0.4°F | 8.74 |
| 2025 | 79.0°F | +0.8°F | 12.75 |
Source: observed years: ACIS, station USW00021510. A year counts only with all twelve months complete.
How does Kailua's climate compare?
Kailua is warmer than 17 of the other 17 places with their own NOAA record in Hawaii, and wetter than 0. Across the 7,247 U.S. stations with normals, its annual mean of 78.2°F is warmer than 100%.
In the Köppen classification computed from these normals, Kailua is BWh: hot desert. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Kailua share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Kaiminani, HI11,542 people · 3 mi NE
- Holualoa, HI2,825 people · 10 mi SE
- Kaloko, HI1,555 people · 6 mi E
- Honalo, HI1,057 people · 14 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Kailua's climate
What is the coldest month in Kailua?
January, with a normal high of 81°F and a normal low of 69°F. The warmest is August (87°F by day, 76°F at night).
What is the rainiest month in Kailua?
January, with 1.35 in of precipitation in a normal year; the driest is July with 0.49 in.
What plant hardiness zone is Kailua in?
The USDA's 2023 map puts Kailua in zone 11a in ZIP code 96725, the nearest ZIP area. By the same method at Kailua's NOAA station, the coldest night of a typical year reaches 62°F (21 years, 1991-2020): zone 13a.
Nearby and next
- Hawaii climateThe statewide normals and every place in the state
- Ke-Ahole Point 68.13, HI1 miles from this station, 76.7°F a year
- Puukohola Heiau 98.1, HI25 miles from this station, 78.8°F a year
- Mauna Loa (5 mi NNE), HI34 miles from this station, 46.0°F a year
- Opihihale #2 24.1, HI34 miles from this station, 68.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made