CLIMATIC NORMALS, MEANS, AND EXTREMES FOR HILO, KAHULUI, HONOLULU, AND LIHUE AIRPORTS
(Normals are 30-year averages (1971-2000) Subject Hilo Kahului Honolulu Lihue
Normal temperatures (°F.):
Daily maximum 81.0 84.3 84.7 81.1
Daily minimum 66.7 67.3 70.2 70.3
Coolest month February February February January
Warmest month September September September September
Annual1 73.9 75.8 77.5 75.7
Extreme temperatures (°F.):
Record highest 94 97 95 90
Record lowest 53 22 53 50
Normal degree days2:
Heating - - - -
Cooling 3,228 3,936 4,561 3,920
Precipitation (inches):
Normal 126.27 18.80 18.29 39.57
Maximum monthly 50.82 14.46 20.79 36.13
Minimum monthly 0.13 0.00 0.01 0.08
Maximum in 24 hours 27.36 7.01 17.07 11.54
Normal relative humidity (percent): 79 — 69 75
Wind speed (m.p.h.):
Mean 6.9 13.1 10.4 13.5
Maximum 2-minute 37 48 40 48
Percent of possible sunshine 41 67 71 59
Number of days:
Mean
Clear 35.5 130.5 90.0 55.3
Partly cloudy 131.3 145.2 179.8 183.2
Cloudy 195.3 89.5 92.0 123.2
Thunderstorms 10.0 3.2 6.9 7.7
Normal
Precipitation .01 inch or more 274.8 98.7 93.0 197.6
Temperature maximum 90˚ and above 1.2 26.0 35.5 0.3
T Trace amount.
1 Dry bulb is the temperature of the ambient air.
2 Difference between the average daily temperature and 65˚F.
Source: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Climatic Data Center, Local Climatological Data, Annual Summary with Comparative Data, 2009, “Normals, Means and Extremes” for Hilo, Kahului, Honolulu, and Lihue, (annual).
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