Ewa Kalaeloa Airport, Hawaii climate: Climate normals at a NOAA weather station
Ewa Kalaeloa Airport's normal year runs from 65°F January nights to 89°F August afternoons, with 13.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 25.0°C, January lows of 18°C, August highs of 32°C, 353 mm of precipitation a year.
- NOAA stationEwa Kalaeloa Airport
- Station IDUSW00022551
- Location21.32°N 158.07°W
- Elevation54 ft (17 m)
On October 24, the normal high in Ewa Kalaeloa Airport is 87°F and the normal low 71°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ewa Kalaeloa Airport.
- Jan 81° 65°
- Feb 81° 65°
- Mar 82° 66°
- Apr 84° 68°
- May 85° 69°
- Jun 87° 71°
- Jul 88° 73°
- Aug 89° 73°
- Sep 89° 72°
- Oct 87° 72°
- Nov 84° 69°
- Dec 82° 67°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Ewa Kalaeloa Airport each month?
August is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 65°F. The most precipitation falls in December (2.29 in), the least in June (0.27 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 81°F | 65°F | 72.8°F | 1.36 | 7 | <1 | <1 | 11 h |
| February | 81°F | 65°F | 73.0°F | 1.79 | 7 | <1 | <1 | 11 h 30 min |
| March | 82°F | 66°F | 73.8°F | 1.95 | 8 | <1 | <1 | 12 h |
| April | 84°F | 68°F | 75.7°F | 0.63 | 5 | <1 | <1 | 12 h 40 min |
| May | 85°F | 69°F | 76.9°F | 0.97 | 5 | 1 | <1 | 13 h 10 min |
| June | 87°F | 71°F | 79.3°F | 0.27 | 4 | 3 | <1 | 13 h 30 min |
| July | 88°F | 73°F | 80.3°F | 0.29 | 4 | 7 | <1 | 13 h 20 min |
| August | 89°F | 73°F | 81.1°F | 0.62 | 4 | 11 | <1 | 12 h 50 min |
| September | 89°F | 72°F | 80.7°F | 0.67 | 5 | 7 | <1 | 12 h 20 min |
| October | 87°F | 72°F | 79.5°F | 1.30 | 6 | 3 | <1 | 11 h 40 min |
| November | 84°F | 69°F | 76.8°F | 1.77 | 7 | <1 | <1 | 11 h 10 min |
| December | 82°F | 67°F | 74.5°F | 2.29 | 7 | <1 | <1 | 10 h 50 min |
| Year (annual) | 85°F | 69°F | 77.0°F | 13.91 | 68 | 31 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 27°C | 18°C | 22.7°C | 35 mm |
| February | 27°C | 18°C | 22.8°C | 45 mm |
| March | 28°C | 19°C | 23.2°C | 50 mm |
| April | 29°C | 20°C | 24.3°C | 16 mm |
| May | 29°C | 21°C | 24.9°C | 25 mm |
| June | 31°C | 22°C | 26.3°C | 7 mm |
| July | 31°C | 23°C | 26.8°C | 7 mm |
| August | 32°C | 23°C | 27.3°C | 16 mm |
| September | 32°C | 22°C | 27.1°C | 17 mm |
| October | 31°C | 22°C | 26.4°C | 33 mm |
| November | 29°C | 21°C | 24.9°C | 45 mm |
| December | 28°C | 19°C | 23.6°C | 58 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00022551; 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.
Which months are mildest at Ewa Kalaeloa Airport?
Normal highs sit between 65°F and 85°F in January, February, March, April, May, November and December. Of those, May has the fewest days with rain (5).
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 USW00022551.
How hot and how cold does it get at Ewa Kalaeloa Airport?
In a normal year in Ewa Kalaeloa Airport, 31 days a year reach 90°F, nights almost never fall to freezing and 68 days bring measurable precipitation.
- Days at 90°F or more
- 31a 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
- 68a normal year
The highest temperature in this station's record (since 1949) is 100°F, on July 16, 1997; the lowest is 50°F, on January 20, 1969.
The wettest calendar year on that record is 1963, with 36.38 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00022551; records: ACIS (NOAA Regional Climate Centers), station USW00022551. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Ewa Kalaeloa Airport?
Over a year 87% of the sunlight that would reach the ground under clear skies gets through the clouds at Ewa Kalaeloa Airport, 5.8 kWh per square metre a day. July is the sunniest month (90%) and March the cloudiest (82%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 86% | 4.4 |
| February | 84% | 5.0 |
| March | 82% | 5.7 |
| April | 86% | 6.5 |
| May | 88% | 7.0 |
| June | 89% | 7.2 |
| July | 90% | 7.1 |
| August | 90% | 6.9 |
| September | 90% | 6.4 |
| October | 87% | 5.3 |
| November | 86% | 4.5 |
| December | 85% | 4.1 |
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 many heating and cooling degree days does Ewa Kalaeloa Airport record?
A normal year at Ewa Kalaeloa Airport brings 0 heating degree days, 100% fewer than the median U.S. place (5,373), and 4,396 cooling degree days, 4.8 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 9,870 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 0 | 242 |
| February | 0 | 224 |
| March | 0 | 273 |
| April | 0 | 320 |
| May | 0 | 371 |
| June | 0 | 429 |
| July | 0 | 473 |
| August | 0 | 499 |
| September | 0 | 470 |
| October | 0 | 450 |
| November | 0 | 353 |
| December | 0 | 295 |
| Year (annual) | 0 | 4,396 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00022551. 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.
Have recent years at Ewa Kalaeloa Airport been warmer than normal?
2024 averaged 77.0°F, equal to the 1991-2020 normal of 77.0°F. 2 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 78.5°F | +1.5°F | 8.60 |
| 2023 | 77.6°F | +0.6°F | 13.39 |
| 2024 | 77.0°F | at normal | 12.29 |
Source: observed years: ACIS, station USW00022551. A year counts only with all twelve months complete.
How does Ewa Kalaeloa Airport's climate compare?
Ewa Kalaeloa Airport is warmer than 15 of the 18 places with their own NOAA record in Hawaii, and wetter than 1. Across the 7,247 U.S. stations with normals, its annual mean of 77.0°F is warmer than 100%.
In the Köppen classification computed from these normals, Ewa Kalaeloa Airport is BSh: hot semi-arid steppe. 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 Ewa Kalaeloa Airport 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.
- Kapolei, HI23,033 people · 2 mi N
- Ewa Villages, HI6,918 people · 2 mi NE
- East Kapolei, HI6,200 people · 4 mi NE
- Kalaeloa, HI3,229 people · 0 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 Ewa Kalaeloa Airport's climate
What is the coldest month at Ewa Kalaeloa Airport?
January, with a normal high of 81°F and a normal low of 65°F. The warmest is August (89°F by day, 73°F at night).
What is the rainiest month at Ewa Kalaeloa Airport?
December, with 2.29 in of precipitation in a normal year; the driest is June with 0.27 in.
What plant hardiness zone is Ewa Kalaeloa Airport in?
The USDA's 2023 map puts Ewa Kalaeloa Airport in zone 12b in ZIP code 96707, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 55°F (21 years, 1991-2020): zone 12a.
Nearby and next
- Hawaii climateThe statewide normals and every place in the state
- Ewa Beach, HI4 miles from this station, 75.3°F a year
- Puu Manawahua 725.6, HI6 miles from this station, 70.5°F a year
- Honolulu, HI9 miles from this station, 78.0°F a year
- Wahiawa, HI13 miles from this station, 71.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made