Monthly outlook for Ontario, NY: average high 55.3°, average low 44.3°. That is 0° below the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 7 days and 2.3 inches. The warmest day looks like 19 October (67.4°), the coolest 29 October (36.4°).
55.3°/44.3°
Average high / low
−0°
Below normal
4 / 7
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
58.2°
56.2°
+1.1°
29 October – 7 November
50.5°
53.1°
-1.4°
8 November – 17 November
at normal
47.6°
—
October records over 66 years
86.5°1 October 2019All-time high
28.9°23 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Irondequoit (13 mi).
Tue, 2059° / 44°0
59 °
Ontario, Tuesday, 20 October
Clear. High 59°, low 44°.
Pressure30.45 inHg
Wind14 mph NE
Humidity77%
Visibility6.2 mi
Dew point47°
Wed, 2155° / 43°0
55 °
Ontario, Wednesday, 21 October
Clear. High 55°, low 43°.
Pressure30.36 inHg
Wind1.5 mph E
Humidity67%
Visibility6.2 mi
Dew point42°
Thu, 2256° / 50°0.02
56 °
Ontario, Thursday, 22 October
Light rain. High 56°, low 50°.
Pressure30.18 inHg
Wind16.4 mph N
Humidity78%
Visibility6.2 mi
Dew point46°
Fri, 2351° / 45°0
51 °
Ontario, Friday, 23 October
Overcast. High 51°, low 45°.
Pressure30.39 inHg
Wind9.8 mph N
Humidity68%
Visibility6.2 mi
Dew point36°
Sat, 2453° / 45°0
53 °
Ontario, Saturday, 24 October
Overcast. High 53°, low 45°.
Pressure30.53 inHg
Wind9.1 mph SW
Humidity74%
Visibility—
Dew point42°
Sun, 2564° / 45°0
64 °
Ontario, Sunday, 25 October
Clear. High 64°, low 45°.
Pressure30.42 inHg
Wind11.3 mph S
Humidity52%
Visibility—
Dew point38°
Mon, 2658° / 51°0
58 °
Ontario, Monday, 26 October
Partly cloudy. High 58°, low 51°.
Pressure30.27 inHg
Wind13.2 mph SW
Humidity74%
Visibility—
Dew point50°
Tue, 2761° / 48°0.02
61 °
Ontario, Tuesday, 27 October
Light rain. High 61°, low 48°.
Pressure30.15 inHg
Wind14.6 mph S
Humidity71%
Visibility—
Dew point45°
Wed, 2859° / 39°0.12
59 °
Ontario, Wednesday, 28 October
Snow. High 59°, low 39°.
Pressure29.74 inHg
Wind26.3 mph W
Humidity89%
Visibility—
Dew point47°
Thu, 2941° / 36°0.11
41 °
Ontario, Thursday, 29 October
Snow. High 41°, low 36°.
Pressure30.03 inHg
Wind20.4 mph W
Humidity68%
Visibility—
Dew point28°
Fri, 3052° / 36°0
52 °
Ontario, Friday, 30 October
Partly cloudy. High 52°, low 36°.
Pressure30.06 inHg
Wind19.2 mph SW
Humidity56%
Visibility—
Dew point30°
Sat, 3154° / 45°0
54 °
Ontario, Saturday, 31 October
Partly cloudy. High 54°, low 45°.
Pressure30.18 inHg
Wind17.2 mph SW
Humidity44%
Visibility—
Dew point30°
Sun, 0154° / 47°0.37
54 °
Ontario, Sunday, 1 November
Rain. High 54°, low 47°.
Pressure30.18 inHg
Wind13.4 mph SE
Humidity66%
Visibility—
Dew point40°
Mon, 0253° / 48°0.09
53 °
Ontario, Monday, 2 November
Light rain. High 53°, low 48°.
Pressure29.80 inHg
Wind17.4 mph N
Humidity90%
Visibility—
Dew point50°
Tue, 0349° / 46°0.03
49 °
Ontario, Tuesday, 3 November
Light rain. High 49°, low 46°.
Pressure29.71 inHg
Wind18.8 mph NW
Humidity89%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0452° / 41°0.13
52 °
Ontario, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.13 in
Chance of precipitation50%
Record high72° (2022)
Record low28° (1989)
Thu, 0553° / 42°0.13
53 °
Ontario, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.13 in
Chance of precipitation58%
Record high77° (2024)
Record low25° (1991)
Fri, 0652° / 41°0.12
52 °
Ontario, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.12 in
Chance of precipitation50%
Record high71° (2022)
Record low30° (1991)
Sat, 0750° / 40°0.13
50 °
Ontario, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.13 in
Chance of precipitation50%
Record high72° (1975)
Record low30° (1992)
Sun, 0850° / 39°0.14
50 °
Ontario, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.14 in
Chance of precipitation43%
Record high70° (2020)
Record low26° (2019)
Mon, 0950° / 39°0.11
50 °
Ontario, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.11 in
Chance of precipitation48%
Record high74° (2020)
Record low24° (2019)
Tue, 1050° / 39°0.14
50 °
Ontario, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.14 in
Chance of precipitation50%
Record high75° (2020)
Record low21° (2017)
Wed, 1148° / 39°0.19
48 °
Ontario, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.19 in
Chance of precipitation60%
Record high69° (2020)
Record low26° (2017)
Thu, 1247° / 37°0.15
47 °
Ontario, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.15 in
Chance of precipitation50%
Record high68° (1964)
Record low19° (2019)
Fri, 1346° / 35°0.1
46 °
Ontario, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation55%
Record high64° (1964)
Record low16° (2019)
Sat, 1447° / 37°0.13
47 °
Ontario, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.13 in
Chance of precipitation45%
Record high68° (1994)
Record low19° (1986)
Sun, 1547° / 36°0.18
47 °
Ontario, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.18 in
Chance of precipitation52%
Record high65° (1960)
Record low19° (1967)
Mon, 1646° / 35°0.14
46 °
Ontario, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.14 in
Chance of precipitation38%
Record high65° (1990)
Record low18° (1967)
Tue, 1745° / 35°0.13
45 °
Ontario, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.13 in
Chance of precipitation57%
Record high62° (1987)
Record low17° (2019)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Ontario, NY are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Ontario, NY since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.