Wahiawa, Hawaii climate: Normal weather by month, frost dates and records
Wahiawa's normal year runs from 60°F February nights to 83°F August afternoons, with 64.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 22.2°C, February lows of 16°C, August highs of 28°C, 1,628 mm of precipitation a year.
- NOAA stationUpper Wahiawa 874.3
- Station IDUSC00518838
- Location21.50°N 158.01°W
- Elevation1,006 ft (307 m)
- Population (census place)17,515
On October 14, the normal high in Wahiawa is 82°F and the normal low 67°F, and the chance of measurable rain or snow is 70%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Wahiawa.
- Jan 76° 61°
- Feb 76° 60°
- Mar 77° 62°
- Apr 77° 63°
- May 79° 65°
- Jun 80° 67°
- Jul 82° 67°
- Aug 83° 68°
- Sep 83° 67°
- Oct 82° 66°
- Nov 79° 65°
- Dec 77° 63°
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 Wahiawa each month?
August is the warmest month, with normal highs of 83°F; February the coldest, with normal lows of 60°F. The most precipitation falls in December (7.52 in), the least in August (3.96 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 76°F | 61°F | 68.5°F | 5.18 | 17 | <1 | <1 | 11 h |
| February | 76°F | 60°F | 68.0°F | 4.31 | 15 | <1 | <1 | 11 h 30 min |
| March | 77°F | 62°F | 69.3°F | 6.30 | 17 | <1 | <1 | 12 h |
| April | 77°F | 63°F | 70.2°F | 5.62 | 22 | <1 | <1 | 12 h 40 min |
| May | 79°F | 65°F | 71.9°F | 4.33 | 18 | <1 | <1 | 13 h 10 min |
| June | 80°F | 67°F | 73.4°F | 4.23 | 22 | <1 | <1 | 13 h 30 min |
| July | 82°F | 67°F | 74.4°F | 5.17 | 23 | <1 | <1 | 13 h 20 min |
| August | 83°F | 68°F | 75.5°F | 3.96 | 20 | <1 | <1 | 12 h 50 min |
| September | 83°F | 67°F | 75.1°F | 4.61 | 19 | <1 | <1 | 12 h 20 min |
| October | 82°F | 66°F | 73.9°F | 5.76 | 22 | <1 | <1 | 11 h 40 min |
| November | 79°F | 65°F | 72.2°F | 7.09 | 22 | <1 | <1 | 11 h 10 min |
| December | 77°F | 63°F | 70.0°F | 7.52 | 20 | <1 | <1 | 10 h 50 min |
| Year (annual) | 79°F | 65°F | 71.9°F | 64.08 | 237 | 1 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 25°C | 16°C | 20.3°C | 132 mm |
| February | 24°C | 16°C | 20.0°C | 109 mm |
| March | 25°C | 17°C | 20.7°C | 160 mm |
| April | 25°C | 17°C | 21.2°C | 143 mm |
| May | 26°C | 18°C | 22.2°C | 110 mm |
| June | 27°C | 19°C | 23.0°C | 107 mm |
| July | 28°C | 20°C | 23.6°C | 131 mm |
| August | 28°C | 20°C | 24.2°C | 101 mm |
| September | 28°C | 20°C | 23.9°C | 117 mm |
| October | 28°C | 19°C | 23.3°C | 146 mm |
| November | 26°C | 18°C | 22.3°C | 180 mm |
| December | 25°C | 17°C | 21.1°C | 191 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00518838; 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 Wahiawa?
Every month's normal high in Wahiawa 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 USC00518838.
How hot and how cold does it get in Wahiawa?
In a normal year in Wahiawa, 1 day a year reaches 90°F, nights almost never fall to freezing and 237 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
- 237a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00518838.
How sunny is Wahiawa?
Over a year 87% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Wahiawa, 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 much heating and cooling does Wahiawa need?
A normal year in Wahiawa brings 12 heating degree days, 100% fewer than the median U.S. place (5,373), and 2,522 cooling degree days, 2.8 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 7,985 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 5 | 112 |
| February | 4 | 87 |
| March | 2 | 134 |
| April | 1 | 157 |
| May | 0 | 212 |
| June | 0 | 252 |
| July | 0 | 291 |
| August | 0 | 326 |
| September | 0 | 303 |
| October | 0 | 278 |
| November | 0 | 215 |
| December | 0 | 157 |
| Year (annual) | 12 | 2,522 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00518838. 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 Wahiawa's climate compare?
Wahiawa is warmer than 2 of the other 17 places with their own NOAA record in Hawaii, and wetter than 12. Across the 7,247 U.S. stations with normals, its annual mean of 71.9°F is warmer than 97%.
In the Köppen classification computed from these normals, Wahiawa is Af: tropical rainforest. 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 Wahiawa share this climate record?
8 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.
- Mililani Town, HI27,495 people · 4 mi S
- Mililani Mauka, HI21,967 people · 2 mi SE
- Schofield Barracks, HI16,755 people · 3 mi W
- Waipio, HI11,196 people · 6 mi S
- Waipio Acres, HI5,146 people · 2 mi S
- Whitmore Village, HI3,821 people · 1 mi NW
- Helemano, HI3,206 people · 3 mi N
- Wheeler AFB, HI2,196 people · 2 mi SW
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 Wahiawa's climate
What is the coldest month in Wahiawa?
February, with a normal high of 76°F and a normal low of 60°F. The warmest is August (83°F by day, 68°F at night).
Does it snow in Wahiawa?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Wahiawa?
December, with 7.52 in of precipitation in a normal year; the driest is August with 3.96 in.
What plant hardiness zone is Wahiawa in?
The USDA's 2023 map puts Wahiawa in zone 12a in ZIP code 96857, the nearest ZIP area.
Nearby and next
- Hawaii climateThe statewide normals and every place in the state
- Poamoho Experiment Farm 855.2, HI6 miles from this station, 73.3°F a year
- Waimea Valley 892.2, HI10 miles from this station, 74.4°F a year
- Kapaka Farm 904.1, HI10 miles from this station, 76.2°F a year
- Puu Manawahua 725.6, HI11 miles from this station, 70.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made