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Wailuku, HI Weather


Wailuku, HI climate is warm during summer when temperatures tend to be in the 70's and warm during winter when temperatures tend to be in the 70's.

The warmest month of the year is September with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is February with an average minimum temperature of 9.99 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 17 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.

The annual average precipitation at Wailuku is 9.99 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 6.74 Inches.

Weather Data

Normal Climate

Normal Temperatures

(KAHULUI AP 398 Weather station, 4.86 miles from Wailuku)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 80.3 80.8 81.5 82.5 84.3 86.0 86.9 87.9 88.1 86.9 84.1 81.7 84.3
Mean °F 71.8 71.9 73.1 74.2 75.7 77.6 78.8 79.5 79.1 78.1 76.0 73.4 75.8
Min °F 63.3 63.1 64.6 66.0 67.0 69.3 70.8 71.0 70.0 69.4 67.9 65.1 67.3

Normal Precipitation

(WAILUKU 386 Weather station, 1.16 miles from Wailuku)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 6.74 3.89 4.14 3.33 2.20 0.64 1.11 0.98 0.96 2.11 3.92 4.00 9.99