Monthly outlook for Williamson, NY: average high 57.2°, average low 45.8°. That is 0.3° below the climate normal for October. Precipitation is expected on 8 days (about 1.5 inches), against a normal of 7 days and 2.3 inches. The warmest day looks like 13 October (74.7°), the coolest 18 October (36.2°).
57.2°/45.8°
Average high / low
−0.3°
Below normal
8 / 7
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
58.3°
58.7°
-0.3°
21 October – 30 October
55.3°
54.9°
+0.2°
31 October – 9 November
at normal
52.1°
—
October records over 66 years
87.3°1 October 2019All-time high
28.4°20 October 1972All-time low
Climate normals and records are computed from the nearest reference point — Sodus (7 mi).
Mon, 1265° / 44°0.02
65 °
Williamson, Monday, 12 October
Light rain. High 65°, low 44°.
Pressure29.91 inHg
Wind10.2 mph NW
Humidity87%
Visibility6.2 mi
Dew point58°
Tue, 1375° / 60°0.15
75 °
Williamson, Tuesday, 13 October
Rain. High 75°, low 60°.
Pressure29.74 inHg
Wind12 mph SW
Humidity78%
Visibility6.2 mi
Dew point64°
Wed, 1465° / 60°0.04
65 °
Williamson, Wednesday, 14 October
Light rain. High 65°, low 60°.
Pressure29.91 inHg
Wind12.7 mph NW
Humidity88%
Visibility6.2 mi
Dew point58°
Thu, 1558° / 50°0
58 °
Williamson, Thursday, 15 October
Partly cloudy. High 58°, low 50°.
Pressure30.36 inHg
Wind15 mph N
Humidity70%
Visibility—
Dew point44°
Fri, 1657° / 49°0.74
57 °
Williamson, Friday, 16 October
Rain. High 57°, low 49°.
Pressure29.77 inHg
Wind29 mph NW
Humidity88%
Visibility—
Dew point51°
Sat, 1750° / 40°0.07
50 °
Williamson, Saturday, 17 October
Snow. High 50°, low 40°.
Pressure29.77 inHg
Wind21.3 mph W
Humidity71%
Visibility—
Dew point40°
Sun, 1842° / 36°0.06
42 °
Williamson, Sunday, 18 October
Snow. High 42°, low 36°.
Pressure30.24 inHg
Wind22.8 mph N
Humidity57%
Visibility—
Dew point24°
Mon, 1950° / 37°0
50 °
Williamson, Monday, 19 October
Overcast. High 50°, low 37°.
Pressure30.42 inHg
Wind15.1 mph N
Humidity57%
Visibility—
Dew point28°
Tue, 2058° / 42°0
58 °
Williamson, Tuesday, 20 October
Clear. High 58°, low 42°.
Pressure30.30 inHg
Wind15.3 mph SW
Humidity56%
Visibility—
Dew point35°
Wed, 2162° / 44°0
62 °
Williamson, Wednesday, 21 October
Clear. High 62°, low 44°.
Pressure30.42 inHg
Wind8.7 mph SW
Humidity46%
Visibility—
Dew point33°
Thu, 2263° / 46°0.01
63 °
Williamson, Thursday, 22 October
Light rain. High 63°, low 46°.
Pressure30.30 inHg
Wind10.3 mph SW
Humidity50%
Visibility—
Dew point38°
Fri, 2351° / 48°0.03
51 °
Williamson, Friday, 23 October
Light rain. High 51°, low 48°.
Pressure30.33 inHg
Wind12.3 mph NW
Humidity79%
Visibility—
Dew point45°
Sat, 2462° / 41°0.12
62 °
Williamson, Saturday, 24 October
Light rain. High 62°, low 41°.
Pressure30.15 inHg
Wind16.9 mph S
Humidity61%
Visibility—
Dew point37°
Sun, 2550° / 44°0.08
50 °
Williamson, Sunday, 25 October
Light rain. High 50°, low 44°.
Pressure30.00 inHg
Wind24 mph W
Humidity67%
Visibility—
Dew point38°
Mon, 2644° / 41°0.03
44 °
Williamson, Monday, 26 October
Light rain. High 44°, low 41°.
Pressure30.06 inHg
Wind12.5 mph NW
Humidity67%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2755° / 43°0.15
55 °
Williamson, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.15 in
Chance of precipitation50%
Record high77° (2023)
Record low29° (1976)
Wed, 2854° / 42°0.15
54 °
Williamson, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.15 in
Chance of precipitation47%
Record high73° (1984)
Record low30° (1976)
Thu, 2952° / 42°0.12
52 °
Williamson, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.12 in
Chance of precipitation42%
Record high69° (1982)
Record low30° (1965)
Fri, 3053° / 41°0.12
53 °
Williamson, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.12 in
Chance of precipitation28%
Record high76° (2024)
Record low33° (1966)
Sat, 3155° / 42°0.13
55 °
Williamson, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.13 in
Chance of precipitation35%
Record high77° (2024)
Record low30° (1988)
Sun, 0155° / 43°0.15
55 °
Williamson, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.15 in
Chance of precipitation48%
Record high73° (2024)
Record low33° (1965)
Mon, 0254° / 42°0.23
54 °
Williamson, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.23 in
Chance of precipitation52%
Record high72° (1971)
Record low28° (1965)
Tue, 0353° / 41°0.12
53 °
Williamson, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.12 in
Chance of precipitation50%
Record high71° (1961)
Record low31° (2002)
Wed, 0452° / 41°0.15
52 °
Williamson, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.15 in
Chance of precipitation48%
Record high73° (2022)
Record low29° (1989)
Thu, 0552° / 41°0.14
52 °
Williamson, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.14 in
Chance of precipitation55%
Record high77° (2024)
Record low26° (1991)
Fri, 0651° / 40°0.13
51 °
Williamson, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.13 in
Chance of precipitation53%
Record high70° (2022)
Record low30° (2021)
Sat, 0750° / 39°0.13
50 °
Williamson, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.13 in
Chance of precipitation48%
Record high71° (2020)
Record low29° (2002)
Sun, 0850° / 38°0.15
50 °
Williamson, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.15 in
Chance of precipitation43%
Record high71° (2020)
Record low26° (2019)
Mon, 0950° / 38°0.11
50 °
Williamson, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation43%
Record high72° (2020)
Record low23° (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 Williamson, 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 Williamson, 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.