Hilo, HI: May

31 May 2026: May 2026 averaged 75°F in Hilo, HI, the warmest May since 2025, tied 14th warmest of 76 (with 2025, 2013, 2007 and 2 other years).

May 2026

Mean temperature: 75°F; Warmest since 2025; 14th warmest of 76
Precipitation: 18.18 in; Wettest since 2006; 6th wettest of 77

A normal May in Hilo, HI (1991 to 2020): a mean temperature of 74.6°F, between 72.8°F and 76°F in eight years of ten and 6.87 in of precipitation, between 2.83 in and 11.21 in in eight years of ten.

The mean temperature of every May in Hilo, HI since 1950: 75°F in 2026; the highest is 77.3°F, in 1980.

Normal range, 72.8 to 76°F

Every year, ranked, as a table

Every May in Hilo, HI from 1950 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	75	14	81.3	35	68.6	9	18.18	6	0
2025	75	14	82.8	17	67.1	26	4.51	60	0
2024	74.4	29	81	43	67.8	16	9.85	22	1
2023	74.4	29	81.4	31	67.3	23	5.46	56	0
2022	74.9	20	81.7	27	68	14	12.65	14	0
2021							6.17	52	4
2020	77.1	2	84.6	2	69.7	1	3.45	67	0
2019	76.1	5	83.5	7	68.6	9	3.85	64	0
2018	75.3	13	81.3	35	69.4	4	10.79	19	0
2017	74.8	21	82.4	19	67.1	26	7.67	41	0
2016	76.2	4	83.6	6	68.9	5	5.83	55	0
2015	73.8	41	80.5	55	67	28	7.75	40	0
2014	74.6	25	82.9	13	66.4	40	7.41	43	0
2013	75	14	82.9	13	67.2	24	8.43	31	0
2012	73.3	49	80.6	54	66	49	6.56	49	0
2011	73.9	39	80.8	49	67	28	8.48	30	0
2010	74.5	26	81.6	29	67.4	22	2.71	74	0
2009	74.5	26	82.4	19	66.6	32	2.13	77	0
2008	73.9	39	81.9	26	65.8	58	4.12	62	0
2007	75	14	84.2	5	65.7	61	2.32	76	0
2006	72.2	68	78.6	71	65.8	58	22.51	2	0
2005	76	7	84.6	2	67.5	19	3.29	69	0
2004	75.9	9	82.9	13	68.9	5	8.91	27	0
2003	74.1	36	82.2	24	66	49	4.71	58	0
2002	74.3	32	81	43	67.6	17	14.95	11	0
2001	72.3	66	79.5	61	65.1	67	2.94	72	0
2000	73.8	41	81.2	39	66.5	38	3.36	68	0
1999	72.9	57	79.6	59	66.1	47	2.84	73	0
1998	72.1	71	78.3	73	66	49	15.65	9	0
1997	75	14	81.7	27	68.2	13	10.75	20	0
1996	76	7	83.2	10	68.9	5	3.65	66	0
1995	75.5	11	82.4	19	68.6	9	8.68	28	0
1994	74.8	21	82.1	25	67.6	17	7.18	44	0
1993	73.3	49	80.4	56	66.2	45	7.54	42	0
1992	74.8	21	83	12	66.6	32	2.99	71	0
1991	74.2	33	81.4	31	67	28	8.08	35	0
1990	74.1	36	80.7	51	67.5	19	8.13	33	0
1989	72.7	60	78.8	67	66.6	32	19.80	5	0
1988	74.2	33	80.9	47	67.5	19	7.77	39	0
1987	72.5	63	79.2	64	65.8	58	15.65	9	0
1986	75.4	12	82.8	17	67.9	15	8.61	29	0
1985	71.3	75	77.3	76	65.4	64	17.04	7	0
1984	74	38	81	43	66.9	31	6.59	47	0
1983	72.5	63	78.7	69	66.4	40	9.60	26	0
1982	72.9	57	79.2	64	66.6	32	6.89	45	0
1981	74.2	33	81.2	39	67.2	24	4.16	61	0
1980	77.3	1	85	1	69.6	2	5.88	54	0
1979	73.7	44	81.4	31	66.1	47	4.10	63	0
1978	76.1	5	83.4	9	68.9	5	9.64	25	0
1977	74.7	24	83.1	11	66.3	44	10.86	18	0
1976	73	53	79.3	63	66.6	32	6.01	53	0
1975	73	53	81.4	31	64.7	73	3.01	70	0
1974	73.8	41	81.6	29	66	49	8.07	36	0
1973	72.9	57	80.8	49	65	69	8.34	32	0
1972	73	53	81	43	65	69	4.71	58	0
1971	72.2	68	80.9	47	63.5	76	6.49	50	0
1970	73.7	44	81.3	35	66	49	20.26	4	0
1969	74.4	29	82.4	19	66.5	38	7.83	38	0
1968	75.6	10	82.9	13	68.4	12	2.71	74	0
1967	77.1	2	84.6	2	69.5	3	9.84	23	0
1966	75	14	83.5	7	66.4	40	5.04	57	0
1965	74.5	26	82.4	19	66.6	32	21.05	3	0
1964	72	72	78.7	69	65.3	65	25.01	1	0
1963	73.3	49	80.7	51	65.9	56	12.60	15	0
1962	73	53	79.9	58	66	49	13.58	13	0
1961	73.7	44	81.2	39	66.2	45	8.12	34	0
1960	73.4	47	81.2	39	65.6	62	11.70	16	0
1959	73.4	47	80.7	51	66	49	6.70	46	0
1958	72.2	68	78.4	72	65.9	56	7.84	37	0
1957	72.5	63	80.2	57	64.7	73	6.32	51	0
1956	72	72	78.8	67	65.3	65	14.45	12	0
1955	71.5	74	78.3	73	64.7	73	10.69	21	0
1954	72.7	60	79.1	66	66.4	40	9.72	24	0
1953	72.6	62	79.6	59	65.6	62	10.97	17	0
1952	71.3	75	77.8	75	64.9	72	6.57	48	0
1951	73.1	52	81.3	35	65	69	3.76	65	0
1950	72.3	66	79.5	61	65.1	67	15.90	8	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1980	77.3
2020	77.1
1967	77.1
2016	76.2
2019	76.1
1978	76.1
2005	76
1996	76
2004	75.9
1968	75.6

Coldest
Year	Mean, °F
1985	71.3
1952	71.3
1955	71.5
1964	72
1956	72
1998	72.1
2006	72.2
1971	72.2
1958	72.2
2001	72.3
More years share the last value

Wettest
Year	Precipitation, in
1964	25.01
2006	22.51
1965	21.05
1970	20.26
1989	19.80
2026	18.18
1985	17.04
1950	15.90
1998	15.65
1987	15.65

Driest
Year	Precipitation, in
2009	2.13
2007	2.32
2010	2.71
1968	2.71
1999	2.84
2001	2.94
1992	2.99
1975	3.01
2005	3.29
2000	3.36

The hottest, coldest and wettest days

Hottest day: 84°F; 16 May 2026
Coldest night: 65°F; 6 May 2026
Wettest day: 2.48 in; 3 May 2026

Every month, season and year

Months

Seasons

Years

Hilo, HI the day's answers

All-time records

Every answer in words

May 2026 brought 18.18 in of precipitation in Hilo, HI, the wettest May since 2006, 6th wettest of 77.
The hottest day of May 2026 in Hilo, HI: 84°F on Saturday 16 May 2026.
The coldest night of May 2026 in Hilo, HI: a low of 65°F on Wednesday 6 May 2026.
The wettest day of May 2026 in Hilo, HI: 2.48 in on Sunday 3 May 2026.