Monthly Humidity Averages for Hawaii

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The humidity averages for each month are listed below for places in Hawaii.

The Morning relative humidity percentages are for 7 am and Afternoon levels are for 1 pm local standard time. All numbers are averages from decades of weather records.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

Average relative humidity (%) for Hilo, Hawaii
Daily   Morning Afternoon
72 January 78 66
71 February 77 65
73 March 79 66
74 April 80 68
73 May 78 67
72 June 78 65
74 July 80 67
74 August 80 68
73 September 79 67
74 October 79 69
76 November 81 70
74 December 80 68
74 Annual 80 68
Average relative humidity (%) for Honolulu, Oahu
Daily   Morning Afternoon
70 January 79 61
67 February 76 58
65 March 73 57
62 April 69 55
60 May 66 53
58 June 65 51
59 July 67 51
59 August 67 51
60 September 68 52
63 October 70 55
67 November 74 59
69 December 77 60
64 Annual 71 56
Average relative humidity (%) for Kahului, Maui
Daily   Morning Afternoon
72 January 81 62
70 February 79 60
68 March 77 59
66 April 73 58
63 May 70 56
60 June 67 53
63 July 70 55
63 August 70 55
62 September 70 54
65 October 73 56
68 November 76 60
70 December 79 61
66 Annual 74 58
Average relative humidity (%) for Lihue, Kauai
Daily   Morning Afternoon
74 January 81 66
72 February 79 65
72 March 78 66
72 April 76 67
71 May 75 66
70 June 74 65
70 July 75 65
70 August 75 65
71 September 76 65
72 October 77 67
74 November 79 69
74 December 80 68
73 Annual 78 67
Reference

National Climatic Data Center. Comparative Climatic Data.

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