Ontario, OR: 2025

31 December 2025: 2025 averaged 54.3°F in Ontario, OR, the warmest year since 2024, 5th warmest of 66.

2025

Mean temperature: 54.3°F; Warmest since 2024; 5th warmest of 66
Precipitation: 11.32 in; Wettest since 2024; 15th wettest of 71

The mean temperature of every year in Ontario, OR since 1946: 54.3°F in 2025; the highest is 55.6°F, in 2021.

Every year, ranked, as a table

Every year in Ontario, OR from 1945 to 2025, 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
2025	54.3	5	66.9	20	41.7	4	11.32	15	0
2024	55.2	2	67.9	7	42.5	1	12.67	6	0
2023	54.4	4	66.3	26	42.5	1	11.32	15	1
2022	53	19	65.8	32	40.2	14	8.31	43	0
2021	55.6	1	68.7	2	42.5	1	8.17	46	0
2020	54	9	67.5	10	40.4	11	9.16	36	1
2019	53.7	11	66.2	28	41.3	7	12.74	4	0
2018	54.1	8	67	18	41.3	7	6.72	58	3
2017	51.6	39	63.6	55	39.6	18	12.60	7	3
2016	53.1	17	65.8	32	40.3	12	5.94	66	0
2015	54.8	3	67.9	7	41.7	4	9.99	28	0
2014	53.3	16	65.5	36	41	9	10.42	23	0
2013	51.2	45	64	53	38.2	36	5.28	70	2
2012	53.4	15	66.7	23	40.2	14	8.77	41	1
2011	50.5	54	62.9	65	38.1	38	9.13	38	0
2010	51.3	44	63.4	58	39.2	22	12.71	5	0
2009	51	49	63.3	62	38.7	29	9.98	29	1
2008	50.8	53	63.5	56	38	39	6.51	61	0
2007	53.1	17	66.4	25	39.7	16	6.06	65	2
2006	52.5	24	65.4	38	39.7	16	10.57	20	1
2005	50.3	57	63.2	63	37.4	49	12.50	9	8
2004	51.5	42	63.5	56	39.5	19	8.17	46	11
2003	54.2	6	66.9	20	41.4	6	8.18	44	5
2002	52.4	28	65.5	36	39.4	21	5.62	68	0
2001	51.9	37	64.2	49	39.5	19	7.59	52	3
2000	52.3	30	64.2	49	40.3	12	10.22	25	2
1999	51	49	63.4	58	38.7	29	7.08	56	7
1998	52.5	24	64.2	49	40.8	10			5
1997									135
1996			65.6	35					48
1995			64.8	45			8.10	48	56
1994			66.3	26	37.3	51			50
1993					35	72			45
1992					38.7	29			55
1991					37.6	43			50
1990					37.6	43	7.06	57	60
1989					34.5	73	10.08	27	58
1988					37.3	51	8.32	42	69
1987					37.6	43	7.51	53	55
1986					37.6	43	6.48	62	55
1985	47.3	66	61.3	69	33.2	75	7.94	49	33
1984	49.4	63	62.1	68	36.4	66	9.36	34	9
1983	52.3	30	64.5	47	39.2	22	16.79	1	17
1982	49.2	65	62.4	66	35.8	70	12.40	11	10
1981	52.7	22	66.2	28	39.1	25	14.34	3	2
1980	51.6	39	65.2	42	37.9	41	9.81	32	1
1979	50.9	52	65	43	36.8	62	9.82	31	2
1978	51.2	45	65.4	38	37	58	10.28	24	3
1977	51.2	45	65.4	38	37	58	8.18	44	1
1976	49.6	62	64.9	44	34.4	74	6.47	63	3
1975	50.3	57	63.4	58	37.3	51	10.76	19	1
1974	52.3	30	67.1	17	37.6	43	5.57	69	0
1973	53.8	10	68.3	6	39.2	22	9.94	30	1
1972	51.8	38	66.7	23	36.9	61	7.81	50	0
1971	52.7	22	67.2	16	38	39	7.45	54	4
1970	52.2	34	67.3	12	37.1	55	14.38	2	1
1969	52.4	28	67.5	10	37.3	51	11.46	13	0
1968	52.8	20	67.3	12	38.2	36	12.09	12	3
1967	53.5	14	68.4	4	38.5	33	8.79	40	1
1966	54.2	6	70	1	38.4	35	5.78	67	0
1965	52.5	24	67.3	12	37.7	42	9.15	37	1
1964	50	59	64.5	47	35.5	71	12.49	10	0
1963	52.8	20	67	18	38.7	29	9.71	33	2
1962	51.6	39	66.2	28	37	58	10.92	17	2
1961	53.7	11	68.4	4	39.1	25	7.15	55	1
1960	52.1	35	67.3	12	36.8	62	10.43	22	2
1959	52.5	24	67.8	9	37.1	55	9.26	35	0
1958	53.6	13	68.7	2	38.5	33	10.57	20	4
1957	51	49	65.7	34	36.5	65	12.57	8	1
1956	51.4	43	66.9	20	36	69	10.13	26	0
1955									297
1954	51.1	48	64.7	46	37.6	43	6.67	60	0
1953	52.1	35	65.4	38	38.8	27	11.34	14	0
1952	50.4	55	64.1	52	36.3	67	7.74	51	4
1951	50	59	63	64	37.1	55	10.78	18	0
1950	50.4	55	63.4	58	37.4	49	8.88	39	0
1949	50	59	63.9	54	36.1	68	4.86	71	0
1948	49.4	63	62.4	66	36.8	62	6.72	58	8
1947									90
1946	52.3	30	65.9	31	38.8	27	6.46	64	27
1945									181

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2021	55.6
2024	55.2
2015	54.8
2023	54.4
2025	54.3
2003	54.2
1966	54.2
2018	54.1
2020	54
1973	53.8

Coldest
Year	Mean, °F
1985	47.3
1982	49.2
1984	49.4
1948	49.4
1976	49.6
1964	50
1951	50
1949	50
2005	50.3
1975	50.3

Wettest
Year	Precipitation, in
1983	16.79
1970	14.38
1981	14.34
2019	12.74
2010	12.71
2024	12.67
2017	12.60
1957	12.57
2005	12.50
1964	12.49

Driest
Year	Precipitation, in
1949	4.86
2013	5.28
1974	5.57
2002	5.62
1966	5.78
2016	5.94
2007	6.06
1946	6.46
1976	6.47
1986	6.48

The hottest, coldest and wettest days

Hottest day: 104°F; 14 July 2025, 1 July 2025
Coldest night: -1°F; 12 February 2025
Wettest day: 1.14 in; 21 December 2025

Month by month

Month	Mean temperature	Precipitation
January	32.2°F 22nd warmest of 67	1.42 in 23rd wettest of 73
February	30.8°F 9th coldest of 70	3.20 in Wettest of 73
March	47.1°F 9th warmest of 71	1.01 in 25th wettest of 77
April	52.6°F 21st warmest of 70	0.12 in 5th driest of 77
May	62.2°F 17th warmest of 70	0.10 in 3rd driest of 77
June	71.1°F 12th warmest of 68	0.16 in 13th driest of 77
July	78.6°F 21st warmest of 69	0.66 in 3rd wettest of 79
August	75.7°F 20th warmest of 67	0.70 in 9th wettest of 79
September	67.8°F 6th warmest of 69	0.41 in 26th wettest of 78
October	51.1°F 33rd warmest of 70	0.68 in 33rd wettest of 77
November	43.1°F 3rd warmest of 76	0.51 in 16th driest of 79
December	37.5°F Warmest of 71	2.35 in 14th wettest of 77

Hot days and freezes

Ontario, OR has had 67 days at 90°F or above in 2025 through 31 December, the most by that date since 2024, tied 29th most of 69 (with 2020, 2015 and 1968).
Ontario, OR has had 10 days at 100°F or above in 2025 through 31 December, the most by that date since 2024, tied 44th most of 69 (with 2002, 1984 and 1963).
Ontario, OR has had 110 freezing nights (a low of 32°F or below) in 2025 through 31 December, the most by that date since 2023, tied 71st most of 75 (with 2015).
The first freeze of fall 2025 in Ontario, OR came on Tuesday 21 October 2025, the earliest since 2021, tied 68th earliest of 76 (with 1988).
The last freeze of spring 2025 in Ontario, OR came on Saturday 19 April 2025, the latest since 2024, 69th latest of 75.

Daily records set

Date	Record	Value	Before	Check
25 December	Warmest day	54°F	51°F 1964	Provisional
19 December	Warmest day	53°F	50°F 2011	Provisional
17 December	Warmest day	58°F	51°F 1957	Provisional
13 February	Coldest night	1°F	2°F 1989	Provisional
12 February	Coldest night	-1°F	2°F 1989	Provisional

Daily records set and not listed: 0

Every month, season and year

Months

Seasons

Years

2025
2026

Ontario, OR the day's answers

All-time records

Every answer in words

2025 brought 11.32 in of precipitation in Ontario, OR, the wettest year since 2024, tied 15th wettest of 71 (with 2023).
The hottest day of 2025 in Ontario, OR: 104°F on Monday 14 July 2025 and Tuesday 1 July 2025.
The coldest night of 2025 in Ontario, OR: a low of -1°F on Wednesday 12 February 2025.
The wettest day of 2025 in Ontario, OR: 1.14 in on Sunday 21 December 2025.