Hillsboro, OR: May

31 May 2026: May 2026 averaged 59.2°F in Hillsboro, OR (1 day missing), the warmest May since 2023, tied 15th warmest of 96 (with 2019).

May 2026

Mean temperature: 59.2°F; Warmest since 2023; 15th warmest of 96
Precipitation: 0.71 in; Driest since 2021; 14th driest of 97

A normal May in Hillsboro, OR (1991 to 2020): a mean temperature of 57.1°F, between 53.2°F and 59.9°F in eight years of ten and 1.78 in of precipitation, between 0.72 in and 4.02 in in eight years of ten.

The mean temperature of every May in Hillsboro, OR since 1930: 59.2°F in 2026; the highest is 62.5°F, in 1958.

Normal range, 53.2 to 59.9°F

Every year, ranked, as a table

Every May in Hillsboro, OR from 1930 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	59.2	15	71.5	22	46.9	13	0.71	84	1
2025	56.9	40	69.4	46	44.5	38	0.76	81	0
2024	55.2	66	67.5	60	43	71	2.46	25	0
2023	61.1	3	74.5	4	47.7	8	0.89	71	0
2022	53.2	84	63.1	91	43.2	68	4.05	5	0
2021	56.8	42	70.1	37	43.5	62	0.49	89	0
2020	57.9	30	69	49	46.7	16	1.86	40	0
2019	59.2	15	71.9	18	46.5	19	1.45	51	0
2018	59.8	11	72.8	12	46.9	13	0.11	97	0
2017	58.4	24	70.1	37	46.7	16	1.82	42	0
2016	59.9	8	71.9	18	48	6	0.80	78	0
2015	58.8	20	70.6	33	47.1	12	0.44	91	0
2014	58.1	27	69.9	40	46.3	20	1.70	44	0
2013	57.1	37	68.6	51	45.6	28	3.98	7	0
2012	54.9	70	66.9	63	43	71	2.34	26	0
2011	51.2	96	61.6	96	40.8	89	2.10	33	2
2010	53.4	83	63.2	90	43.6	58	3.16	15	0
2009	55.8	54	70	39	41.7	79	2.92	17	0
2008	56.5	45	66.9	63	46.1	21	0.97	67	0
2007	55.9	53	69.4	46	42.4	75	1.29	61	0
2006	56.6	43	69.6	43	43.6	58	2.70	21	0
2005	57.7	31	67.4	61	48	6	4.35	2	0
2004	57.1	37	66.7	66	47.5	10	1.24	63	0
2003	55.5	59	66.6	68	44.5	38	0.75	82	0
2002	53.1	86	64.5	83	41.7	79	1.44	52	0
2001	56.1	51	71	26	41.1	86	0.85	74	0
2000	55.3	63	65.3	78	45.3	33	1.91	38	0
1999	52	94	63.5	88	40.5	91	1.74	43	0
1998	57.6	33	64.9	80	50.5	2	4.77	1	1
1997	62.3	2	74	7	50.7	1	2.01	37	0
1996	54.7	74	63.5	88	45.6	28	4.34	3	2
1995	59.7	12	71.7	21	47.7	8	1.35	57	0
1994	58.4	24	69.8	41	46.9	13	1.15	65	0
1993	60.3	5	71	26	49.4	3	3.52	11	1
1992	60	7	75.5	3	45.1	34	0.13	96	1
1991	53.2	84	62.4	94	44	49	2.34	26	0
1990	54.9	70	65.5	76	44.3	43	2.11	32	1
1989	56.4	47	68	55	44.8	37	1.90	39	1
1988	54.3	79	65.3	78	43.7	56	2.74	20	1
1987	58.8	20	71	26	46.6	18	1.42	53	0
1986	55.5	59	66.5	69	44.5	38	2.04	35	0
1985	55.7	55	68.7	50	42.7	73	0.41	92	2
1984	52.9	88	64.2	86	41.7	79	3.75	8	3
1983	58.6	22	71.4	23	45.8	26	0.91	70	0
1982	55.2	66	68	55	42.2	78	0.39	93	1
1981	55.3	63	66.2	72	44.5	38	2.07	34	0
1980	55.4	62	66.5	69	44.3	43	1.33	58	0
1979	56.9	40	70.2	36	43.7	56	1.37	55	0
1978	54.5	78	65.7	74	43.2	68	2.63	23	1
1977	52.5	91	62.6	93	42.3	77	3.27	13	0
1976	55.6	56	67.7	59	43.5	62	1.53	48	0
1975	56	52	68.5	52	43.6	58	1.84	41	1
1974	53.9	82	64.3	85	43.5	62	1.29	61	0
1973	57.1	37	70.4	34	43.5	62	0.85	74	1
1972	59.1	17	72.5	13	45.7	27	1.12	66	0
1971	56.6	43	69.2	48	43.9	51	0.74	83	0
1970	55.6	56	69.5	44	41.6	82	0.96	69	0
1969	58.1	27	72.1	16	44.1	46	1.53	48	2
1968	55.1	68	66.7	66	44	49	2.60	24	1
1967	54.6	77	68.3	53	41	87	0.89	71	0
1966	55.3	63	69.8	41	40.7	90	0.50	88	0
1965	52.1	92	64.9	80	39.3	93	0.82	76	0
1964	51.7	95	64.4	84	39.1	94	0.67	85	0
1963	56.5	45	68.3	53	44.2	45	2.21	31	1
1962	52.1	92	60.7	97	43.5	62	2.04	35	0
1961	56.2	50	66.4	71	46	23	2.65	22	0
1960	52.7	89	61.7	95	44.1	46	4.23	4	2
1959	54.7	74	65.9	73	43.2	68	3.16	15	1
1958	62.5	1	75.6	2	49.4	3	1.32	59	0
1957	59.9	8	71	26	49.1	5	2.87	19	2
1956	59.9	8	72.5	13	47.4	11	1.31	60	0
1955	53	87	64.7	82	41.3	84	0.97	67	0
1954	57.7	31	71.9	18	43.5	62	1.40	54	1
1953	54.8	72	65.5	76	43.9	51	2.29	29	1
1952	57.5	34	71.4	23	43.6	58	0.62	86	0
1951	57.4	35	71	26	43.8	53	1.47	50	0
1950	54.7	74	69.5	44	40.4	92	0.35	94	1
1949	59.5	14	73.5	8	45.5	30	2.27	30	0
1948	55.6	56	66.8	65	44.5	38	4.05	5	1
1947	59.1	17	74.4	6	43.8	53	0.16	95	0
1946	59.1	17	73.3	9	44.9	35	1.68	45	0
1945	58	29	70.4	34	45.5	30	3.39	12	0
1944	56.3	48	71	26	41.6	82	0.89	71	2
1943	54	81	67.2	62	40.9	88	1.37	55	0
1942	54.8	72	65.7	74	43.8	53	2.88	18	0
1941	56.3	48	67.8	58	44.9	35	3.60	10	0
1940	60.3	5	74.5	4	46	23	1.68	45	0
1939	57.2	36	72	17	42.4	75	0.77	79	0
1938	58.5	23	71	26	46	23	0.52	87	0
1937	58.4	24	71.3	25	45.5	30	0.82	76	0
1936	59.7	12	73.2	10	46.1	21	3.63	9	0
1935	54.1	80	72.5	13	35.8	96	0.45	90	1
1934	55.5	59	73.2	10	37.5	95	1.24	63	2
1933			63.1	91			3.18	14	5
1932	55.1	68	67.9	57	42.6	74	1.65	47	1
1931	60.6	4	77.1	1	44.1	46	0.77	79	1
1930	52.6	90	63.8	87	41.3	84	2.33	28	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1958	62.5
1997	62.3
2023	61.1
1931	60.6
1993	60.3
1940	60.3
1992	60
2016	59.9
1957	59.9
1956	59.9

Coldest
Year	Mean, °F
2011	51.2
1964	51.7
1999	52
1965	52.1
1962	52.1
1977	52.5
1930	52.6
1960	52.7
1984	52.9
1955	53

Wettest
Year	Precipitation, in
1998	4.77
2005	4.35
1996	4.34
1960	4.23
2022	4.05
1948	4.05
2013	3.98
1984	3.75
1936	3.63
1941	3.60

Driest
Year	Precipitation, in
2018	0.11
1992	0.13
1947	0.16
1950	0.35
1982	0.39
1985	0.41
2015	0.44
1935	0.45
2021	0.49
1966	0.50

The hottest, coldest and wettest days

Hottest day: 90°F; 3 May 2026
Coldest night: 36°F; 17 May 2026
Wettest day: 0.24 in; 13 May 2026

Every month, season and year

Months

Seasons

Years

2025

Hillsboro, OR the day's answers

All-time records

Every answer in words

May 2026 brought 0.71 in of precipitation in Hillsboro, OR, the driest May since 2021, 14th driest of 97.
The hottest day of May 2026 in Hillsboro, OR: 90°F on Sunday 3 May 2026.
The coldest night of May 2026 in Hillsboro, OR: a low of 36°F on Sunday 17 May 2026.
The wettest day of May 2026 in Hillsboro, OR: 0.24 in on Wednesday 13 May 2026.