Kahoolawe 499.6, Hawaii climate: Climate normals at a NOAA weather station
Kahoolawe 499.6's normal year runs from 64°F March nights to 78°F August afternoons, with 17.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 21.7°C, March lows of 18°C, August highs of 25°C, 436 mm of precipitation a year.
- NOAA stationKahoolawe 499.6
- Station IDUSC00512558
- Location20.56°N 156.57°W
- Elevation1,200 ft (366 m)
On October 14, the normal high in Kahoolawe 499.6 is 77°F and the normal low 69°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 Kahoolawe 499.6.
- Jan 74° 65°
- Feb 74° 64°
- Mar 73° 64°
- Apr 74° 65°
- May 75° 66°
- Jun 76° 67°
- Jul 77° 69°
- Aug 78° 69°
- Sep 78° 69°
- Oct 77° 69°
- Nov 76° 67°
- Dec 75° 66°
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 Kahoolawe 499.6 each month?
August is the warmest month, with normal highs of 78°F; March the coldest, with normal lows of 64°F. The most precipitation falls in January (2.56 in), the least in August (0.83 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 74°F | 65°F | 69.5°F | 2.56 | 7 | <1 | <1 | 11 h |
| February | 74°F | 64°F | 69.0°F | 1.09 | 6 | 1 | <1 | 11 h 30 min |
| March | 73°F | 64°F | 68.8°F | 1.43 | 7 | <1 | <1 | 12 h |
| April | 74°F | 65°F | 69.4°F | 0.95 | 7 | <1 | <1 | 12 h 40 min |
| May | 75°F | 66°F | 70.7°F | 1.43 | 6 | <1 | <1 | 13 h 10 min |
| June | 76°F | 67°F | 71.8°F | 0.99 | 7 | <1 | <1 | 13 h 20 min |
| July | 77°F | 69°F | 72.6°F | 1.15 | 8 | <1 | <1 | 13 h 20 min |
| August | 78°F | 69°F | 73.4°F | 0.83 | 7 | <1 | <1 | 12 h 50 min |
| September | 78°F | 69°F | 73.4°F | 0.89 | 8 | <1 | <1 | 12 h 20 min |
| October | 77°F | 69°F | 73.1°F | 1.56 | 6 | <1 | <1 | 11 h 40 min |
| November | 76°F | 67°F | 71.5°F | 1.90 | 8 | <1 | <1 | 11 h 10 min |
| December | 75°F | 66°F | 70.3°F | 2.37 | 7 | <1 | <1 | 10 h 50 min |
| Year (annual) | 76°F | 67°F | 71.1°F | 17.15 | 82 | 1 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 23°C | 18°C | 20.8°C | 65 mm |
| February | 23°C | 18°C | 20.6°C | 28 mm |
| March | 23°C | 18°C | 20.4°C | 36 mm |
| April | 23°C | 18°C | 20.8°C | 24 mm |
| May | 24°C | 19°C | 21.5°C | 36 mm |
| June | 24°C | 20°C | 22.1°C | 25 mm |
| July | 25°C | 20°C | 22.6°C | 29 mm |
| August | 25°C | 21°C | 23.0°C | 21 mm |
| September | 26°C | 21°C | 23.0°C | 23 mm |
| October | 25°C | 21°C | 22.8°C | 40 mm |
| November | 24°C | 20°C | 21.9°C | 48 mm |
| December | 24°C | 19°C | 21.3°C | 60 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00512558; 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 Kahoolawe 499.6?
Every month's normal high in Kahoolawe 499.6 falls between 65°F and 85°F.
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 USC00512558.
How hot and how cold does it get at Kahoolawe 499.6?
In a normal year in Kahoolawe 499.6, 1 day a year reaches 90°F, nights almost never fall to freezing and 82 days bring measurable precipitation.
- Days at 90°F or more
- 1a 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
- 82a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00512558.
How sunny is it at Kahoolawe 499.6?
Over a year 86% of the sunlight that would reach the ground under clear skies gets through the clouds at Kahoolawe 499.6, 5.8 kWh per square metre a day. August is the sunniest month (88%) and March the cloudiest (81%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 85% | 4.5 |
| February | 84% | 5.1 |
| March | 81% | 5.6 |
| April | 85% | 6.5 |
| May | 87% | 6.8 |
| June | 87% | 7.0 |
| July | 88% | 7.0 |
| August | 88% | 6.8 |
| September | 88% | 6.3 |
| October | 86% | 5.4 |
| November | 84% | 4.6 |
| December | 83% | 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 Kahoolawe 499.6 record?
A normal year at Kahoolawe 499.6 brings 7 heating degree days, 100% fewer than the median U.S. place (5,373), and 2,250 cooling degree days, 2.5 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 7,719 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1 | 141 |
| February | 2 | 116 |
| March | 3 | 119 |
| April | 0 | 132 |
| May | 0 | 177 |
| June | 0 | 203 |
| July | 0 | 236 |
| August | 0 | 262 |
| September | 0 | 254 |
| October | 0 | 251 |
| November | 0 | 195 |
| December | 0 | 166 |
| Year (annual) | 7 | 2,250 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00512558. 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.
How does Kahoolawe 499.6's climate compare?
Kahoolawe 499.6 is warmer than 2 of the 18 places with their own NOAA record in Hawaii, and wetter than 5. Across the 7,247 U.S. stations with normals, its annual mean of 71.1°F is warmer than 96%.
In the Köppen classification computed from these normals, Kahoolawe 499.6 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.
Questions about Kahoolawe 499.6's climate
What is the coldest month at Kahoolawe 499.6?
March, with a normal high of 73°F and a normal low of 64°F. The warmest is August (78°F by day, 69°F at night).
Does it snow at Kahoolawe 499.6?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Kahoolawe 499.6?
January, with 2.56 in of precipitation in a normal year; the driest is August with 0.83 in.
What plant hardiness zone is Kahoolawe 499.6 in?
The USDA's 2023 map puts Kahoolawe 499.6 in zone 12b in ZIP code 96753, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 59°F (16 years, 1991-2020): zone 12b.
Nearby and next
- Hawaii climateThe statewide normals and every place in the state
- Makena, HI11 miles from this station, 75.1°F a year
- Kula Hospital 267, HI17 miles from this station, 62.9°F a year
- Kula, HI22 miles from this station, 63.9°F a year
- Haleakala Ranger Station 338, HI25 miles from this station, 54.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made