Portland, OR: September

30 September 2026: September 2026 averaged 63.5°F in Portland, OR, the coldest September since 2016, 37th coldest of 86.

September 2026

Mean temperature: 63.5°F; Coldest since 2016; 37th coldest of 86
Precipitation: 0.93 in; Driest since 2024; 27th driest of 86

A normal September in Portland, OR (1991 to 2020): a mean temperature of 65.1°F, between 62.5°F and 67.4°F in eight years of ten and 1.29 in of precipitation, between 0.09 in and 3.08 in in eight years of ten.

The mean temperature of every September in Portland, OR since 1941: 63.5°F in 2026; the lowest is 58.4°F, in 1964.

Normal range, 62.5 to 67.4°F

Every year, ranked, as a table

Every September in Portland, OR from 1941 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
2026	63.5	50	72.6	66	54.4	21	0.93	60
2025	67.7	2	78.2	19	57.1	3	1.06	55
2024	67.7	2	78.3	18	57	4	0.74	66
2023	66.4	15	76.1	37	56.7	6	1.25	47
2022	69.5	1	80.9	3	58.1	1	0.31	76
2021	66.4	15	77.7	23	55.1	17	3.76	7
2020	67.4	6	77.3	28	57.5	2	2.06	24
2019	64.4	38	72.1	68	56.8	5	3.85	6
2018	64.4	38	75.9	39	52.8	36	1.59	37
2017	66.6	14	77.5	26	55.6	15	2.38	21
2016	63.3	52	74.1	51	52.5	42	1.69	32
2015	64	44	74.6	47	53.4	28	1.26	46
2014	67.6	4	78.7	14	56.5	9	0.98	59
2013	64.7	35	72.8	63	56.7	6	5.62	1
2012	66.1	19	78.7	14	53.4	28	0.04	82
2011	67.4	6	79	12	55.8	13	0.62	70
2010	64.4	38	73	60	55.9	12	3.36	10
2009	66.1	19	77.2	30	55.1	17	1.40	43
2008	65.2	28	77.3	28	53.1	33	0.48	72
2007	62.4	61	72.8	63	52	49	2.04	25
2006	65.1	29	77.7	23	52.5	42	0.86	61
2005	62.5	59	73.5	56	51.5	57	1.70	30
2004	62.8	58	71.2	76	54.3	22	1.03	58
2003	66.7	13	78.4	17	55.1	17	0.85	62
2002	64.7	35	76.5	32	52.8	36	1.54	39
2001	65.1	29	76.3	35	53.9	23	0.70	68
2000	63.9	46	73.9	54	53.9	23	1.67	33
1999	64.6	37	78.2	19	51	64	0.10	79
1998	66.9	12	79.1	10	54.7	20	1.09	54
1997	65.9	21	75.7	41	56	10	1.98	26
1996	61.8	65	71.2	76	52.4	45	3.05	15
1995	67.1	10	77.6	25	56.6	8	1.31	45
1994	67.6	4	79.4	9	55.8	13	1.13	50
1993	65.6	24	80.1	4	51.2	62	trace	85
1992	62.2	63	73.5	56	51	64	1.12	51
1991	67.4	6	81.4	2	53.3	31	0.02	83
1990	67	11	78	21	56	10	0.34	74
1989	65.3	26	79.7	6	50.8	68	1.48	40
1988	64	44	76.9	31	51	64	1.76	28
1987	65.5	25	78.5	16	52.4	45	0.30	77
1986	61.5	68	70.7	79	52.3	48	4.30	2
1985	60.8	74	70.6	80	51	64	2.76	18
1984	63.7	48	73.8	55	53.6	27	1.46	41
1983	61.5	68	71.9	72	51.1	63	0.39	73
1982	63.2	55	73.2	58	53.1	33	3.98	3
1981	64.9	33	76.5	32	53.2	32	1.86	27
1980	63.8	47	75.1	44	52.4	45	1.56	38
1979	66.3	18	77.4	27	55.2	16	1.75	29
1978	60.9	73	69	85	52.8	36	2.07	23
1977	60.7	78	69.7	83	51.8	52	3.33	11
1976	64.2	43	74.6	47	53.8	25	0.73	67
1975	65.7	23	79.7	6	51.6	55	trace	85
1974	67.3	9	81.9	1	52.7	41	0.21	78
1973	64.4	38	75.9	39	52.9	35	3.29	12
1972	61.1	72	72.8	63	49.5	79	3.06	14
1971	60.8	74	71.7	74	49.9	76	3.53	9
1970	60.7	78	72.1	68	49.3	81	1.10	53
1969	63.4	51	74	52	52.8	36	3.86	5
1968	61.5	68	71.4	75	51.6	55	2.20	22
1967	66.4	15	80	5	52.8	36	0.76	64
1966	64.4	38	75.4	43	53.4	28	1.70	30
1965	60.4	80	72.9	61	47.9	84	0.01	84
1964	58.4	86	70.3	81	46.5	86	1.61	36
1963	65.1	29	76.5	32	53.7	26	0.75	65
1962	63.3	52	74.8	46	51.8	52	1.66	34
1961	59.5	85	71.1	78	47.9	84	0.64	69
1960	61.5	68	73.2	58	49.8	77	1.37	44
1959	60.3	83	69.3	84	51.3	60	2.81	17
1958	62.3	62	74	52	50.6	70	1.05	57
1957	65.3	26	79.1	10	51.4	59	0.49	71
1956	60.8	74	72	71	49.6	78	1.12	51
1955	60.4	80	71.9	72	48.9	83	2.86	16
1954	60.2	84	69.9	82	50.4	72	0.85	62
1953	62.5	59	74.6	47	50.3	73	1.16	48
1952	64.8	34	79	12	50.6	70	0.33	75
1951	63.1	56	76	38	50.2	75	2.55	20
1950	61.8	65	74.4	50	49.2	82	1.45	42
1949	63.1	56	75	45	51.3	60	1.66	34
1948	61.8	65	72.9	61	50.8	68	3.28	13
1947	63.7	48	75.6	42	51.7	54	1.06	55
1946	62	64	72.5	67	51.5	57	1.15	49
1945	60.8	74	72.1	68	49.5	79	3.96	4
1944	65.1	29	77.8	22	52.5	42	2.73	19
1943	65.8	22	79.5	8	52	49	0.06	80
1942	63.3	52	76.3	35	50.3	73	0.06	80
1941	60.4	80	68.8	86	52	49	3.58	8

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2022	69.5
2025	67.7
2024	67.7
2014	67.6
1994	67.6
2020	67.4
2011	67.4
1991	67.4
1974	67.3
1995	67.1

Coldest
Year	Mean, °F
1964	58.4
1961	59.5
1954	60.2
1959	60.3
1965	60.4
1955	60.4
1941	60.4
1977	60.7
1970	60.7
1985	60.8
More years share the last value

Wettest
Year	Precipitation, in
2013	5.62
1986	4.30
1982	3.98
1945	3.96
1969	3.86
2019	3.85
2021	3.76
1941	3.58
1971	3.53
2010	3.36

Driest
Year	Precipitation, in
1993	trace
1975	trace
1965	0.01
1991	0.02
2012	0.04
1943	0.06
1942	0.06
1999	0.10
1974	0.21
1987	0.30

The hottest, coldest and wettest days

Hottest day: 88°F; 9 September 2026
Coldest night: 46°F; 28 September 2026
Wettest day: 0.30 in; 2 September 2026

Every month, season and year

Months

Seasons

Years

Portland, OR the day's answers

All-time records

Every answer in words

September 2026 brought 0.93 in of precipitation in Portland, OR, the driest September since 2024, 27th driest of 86.
The hottest day of September 2026 in Portland, OR: 88°F on Wednesday 9 September 2026.
The coldest night of September 2026 in Portland, OR: a low of 46°F on Monday 28 September 2026.
The wettest day of September 2026 in Portland, OR: 0.30 in on Wednesday 2 September 2026.