Ontario, OR

4 October 2026: October 2026 so far averaged 63.5°F in Ontario, OR, the warmest 1 to 4 October since 2015, tied 6th warmest of 75 (with 1952).

Sunday 4 October 2026

High: 83°F; Warmest since 2024; 7th warmest of 81
Low: 43°F; Warmest since 2025; 18th warmest of 80

No measurable precipitation in Ontario, OR for 15 days to Sunday 4 October 2026.

Every 4 October high in Ontario, OR since 1945: 83°F in 2026; the highest is 86°F, in 1960.

Normal range, 60.9 to 80.1°F

Every year as a table

Every 4 October low in Ontario, OR since 1945: 43°F in 2026; the lowest is 22°F, in 1973.

Year	High, °F	Low, °F
2026	83	43
2025	69	52
2024	84	37
2023	74	45
2022	82	42
2021	79	40
2020	82	42
2019	64	40
2018	58	42
2017	62	44
2016	64	38
2015	74	43
2014	76	37
2013	64	36
2012	66	28
2011	69	52
2010	72	57
2009	52	41
2008	68	51
2007	61	35
2006	74	47
2005	61	35
2004	78	41
2003	83	46
2002	72	47
2001	79	47
2000	70	36
1999	74	32
1998	62	42
1997	74	40
1996	80
1995	60	26
1994	62	30
1993	81	38
1992	71	39
1991	70	29
1990	75	36
1989	67	36
1988	82	40
1987	79	49
1986	70	35
1985	71	34
1984	80	37
1983	75	34
1982	62	43
1981	61	27
1980	84	41
1979	80	33
1978	79	30
1977	67	34
1976	68	38
1975	80	58
1974	70	43
1973	70	22
1972	81	43
1971	79	34
1970	82	33
1969	68	37
1968	75	35
1967	64	33
1966	76	31
1965	77	33
1964	77	28
1963	80	47
1962	65	48
1961	82	32
1960	86	35
1959	77	35
1958	85	35
1957	57	32
1956	85	35
1954	72	32
1953	74	27
1952	84	46
1951	61	40
1950	75	43
1949	67	30
1948	73	44
1947	75	41
1946	63	42
1945	74	51

The forecast

Date	High	Low
6 October	85°FRecord at riskRecord 85°F, 1979	50°FRecord 20°F, 1974
7 October	Record 90°F, 1971	Record 21°F, 1974

The month and the year

Every year's 1 to 4 October in Ontario, OR, ranked by its mean temperature: October 2026 so far is the tied 6th warmest of 75.

Every year, ranked, as a table

Rank	Year	Mean, °F
1	2003	66.5
2	2011	66.3
2	2010	66.3
4	1963	65.6
5	2015	65.4
6	2026	63.5
6	1952	63.5
8	1997	63.3
9	2020	63.1
10	2022	62.6
10	2001	62.6
12	1988	62.4
13	1987	62.3
14	2008	62
14	1984	62
16	1993	61.8
17	1975	61.6
18	2025	61.3
19	2004	60.8
19	1980	60.8
21	1972	60
22	1979	59.9
22	1970	59.9
22	1960	59.9
25	1947	59.8
26	1958	59.3
27	2006	59.1
28	2024	59
28	1948	59
30	2023	58.9
31	2021	58.8
32	2000	58.4
32	1945	58.4
34	2012	57.9
34	1974	57.9
36	1965	57.8
37	1956	57.6
38	1966	57.4
39	2002	57
39	1968	57
41	1962	56.6
42	2018	56.1
43	1998	56
43	1976	56
45	1951	55.8
46	1985	55.3
47	2014	55
48	1961	54.8
49	1978	54.6
50	1964	54.5
51	1983	54.1
52	2016	54
53	1957	53.8
54	1999	53.6
55	1969	53.5
56	1971	53.4
56	1959	53.4
58	1973	52.8
59	1994	52.6
60	1986	52.5
60	1967	52.5
62	1946	52.4
63	1949	51.8
64	2017	51.4
65	2013	50.8
66	2007	50.5
66	1982	50.5
66	1977	50.5
66	1950	50.5
70	1954	50.4
71	2019	50.3
72	1953	50
73	1981	49.1
74	2005	48.9
75	2009	46.8

Every day as a table

Daily highs and lows in Ontario, OR, 1 to 4 October 2026, with each date's record range and its 1991 to 2020 normal range.

Day	High, °F	Low, °F	Record high	Year	Record low	Year	Normal high	Normal low
1 October 2026	81	49	93	1997	22	1950	77.5	44
2 October 2026	81	44	87	2020	26	1954	72	41.5
3 October 2026	83	44	93	1963	26	1978	72	43
4 October 2026	83	43	86	1960	22	1973	70	40

The warmest, coldest and wettest on this date

The 20 warmest 4 October highs in Ontario, OR since 1945.
Rank	Year	High, °F
1	1960	86
2	1958	85
2	1956	85
4	2024	84
4	1980	84
4	1952	84
7	2026	83
7	2003	83
9	2022	82
9	2020	82
9	1988	82
9	1970	82
9	1961	82
14	1993	81
14	1972	81
16	1996	80
16	1984	80
16	1979	80
16	1975	80
16	1963	80

The 20 coldest 4 October lows in Ontario, OR since 1945.
Rank	Year	Low, °F
1	1973	22
2	1995	26
3	1981	27
3	1953	27
5	2012	28
5	1964	28
7	1991	29
8	1994	30
8	1978	30
8	1949	30
11	1966	31
12	1999	32
12	1961	32
12	1957	32
12	1954	32
16	1979	33
16	1970	33
16	1967	33
16	1965	33
20	1985	34

The 20 wettest 4 October days in Ontario, OR since 1945.
Rank	Year	Precipitation, in
1	2019	0.38
2	2018	0.27
3	1948	0.22
4	2008	0.21
5	1949	0.11
6	2011	0.05
6	2010	0.05
6	2006	0.05
6	1957	0.05
10	2009	0.03
10	1950	0.03
12	2016	0.02
13	1998	trace
13	1982	trace
13	1951	trace
13	1946	trace
17	2026	0.00
17	2025	0.00
17	2024	0.00
17	2023	0.00

Every answer in words

Sunday 4 October 2026: a high of 83°F in Ontario, OR, the warmest 4 October since 2024, tied 7th warmest of 81 (with 2003).
Sunday 4 October 2026: a low of 43°F in Ontario, OR, the warmest 4 October night since 2025, tied 18th warmest of 80 (with 2015, 1982, 1974 and 2 other years).
Forecast for Tuesday 6 October 2026: a high of 85°F in Ontario, OR, which would tie the record for the warmest 6 October, set in 1979 (National Weather Service forecast).
Forecast for Tuesday 6 October 2026: a low of 50°F in Ontario, OR, which would be the warmest 6 October night since 2021, tied 7th warmest of 81 (with 1975, 1961 and 1959) (National Weather Service forecast).
Ontario, OR on 6 October: record high 85°F (1979), record low 20°F (1974).
Ontario, OR on 7 October: record high 90°F (1971), record low 21°F (1974).
October 2026 so far brought 0.00 in of precipitation in Ontario, OR, tying the record for the driest 1 to 4 October, set in 2024, 2022, 2021 and 39 other years, in 78 years since 1945 (1955 excluded: 4 of 4 days missing; 1993 excluded: 4 of 4 days missing; 1995 excluded: 1 of 4 days missing; 1 more year excluded for missing days); provisional.
Fall 2026 so far averaged 62.7°F in Ontario, OR, the coldest 1 September to 4 October since 2016, 30th coldest of 70.
Fall 2026 so far brought 0.41 in of precipitation in Ontario, OR, the wettest 1 September to 4 October since 2025, tied 33rd wettest of 78 (with 1962).
2026 so far averaged 58.1°F in Ontario, OR, the warmest 1 January to 4 October since 2024, 11th warmest of 67.
2026 so far brought 6.57 in of precipitation in Ontario, OR, the wettest 1 January to 4 October since 2025, 31st wettest of 73.
The 30 days to Sunday 4 October 2026 brought 0.02 in of precipitation in Ontario, OR, the driest 30 days to 4 October since 2022, tied 8th driest of 78 (with 1990 and 1983).
The 60 days to Sunday 4 October 2026 brought 0.42 in of precipitation in Ontario, OR, the driest 60 days to 4 October since 2024, tied 28th driest of 79 (with 2017).
The 90 days to Sunday 4 October 2026 brought 0.63 in of precipitation in Ontario, OR, the driest 90 days to 4 October since 2024, 35th driest of 79.
Ontario, OR has had 63 days at 90°F or above in 2026 through 4 October, the most by that date since 2025, 37th most of 70.
Ontario, OR has had 9 days at 100°F or above in 2026 through 4 October, the most by that date since 2025, tied 48th most of 70 (with 2009, 2005, 2000 and 1 other year).
Ontario, OR has had 73 freezing nights (a low of 32°F or below) in 2026 through 4 October, the most by that date since 2023, tied 56th most of 76 (with 2020).
The last freeze of spring 2026 in Ontario, OR came on Tuesday 28 April 2026, the latest since 2024, 59th latest of 76.

Nearby

Boise, ID 49.2 mi
Baker City, OR 69.6 mi
McCall, ID 75.5 mi
Burns, OR 101.5 mi
Stanley, ID 103.8 mi
Malheur County, OR county average
Oregon every city and county

All-time records

About these figures

Daily records for Ontario, OR run from 1945 to 4 October 2026, with 1113 days missing; current station ONTARIO.

Our calculation from NOAA records for Ontario, OR, 1945 to 2026. Preliminary until NOAA's final data.