Monthly outlook for Crystal Brook, NY: average high 58.6°, average low 50.8°. That is 0.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 22 October (65.8°), the coolest 4 November (44.5°).
58.6°/50.8°
Average high / low
+0.3°
Above normal
3 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
59.9°
58.7°
+0.7°
31 October – 9 November
56.4°
55.9°
+0.3°
10 November – 19 November
at normal
51.4°
—
October records over 66 years
89.4°2 October 2019All-time high
32.7°27 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Stony Brook University (5 mi).
Thu, 2266° / 52°0
66 °
Crystal Brook, Thursday, 22 October
Clear. High 66°, low 52°.
Pressure29.97 inHg
Wind10.8 mph N
Humidity48%
Visibility6.2 mi
Dew point39°
Fri, 2358° / 49°0
58 °
Crystal Brook, Friday, 23 October
Clear. High 58°, low 49°.
Pressure30.36 inHg
Wind10.6 mph NE
Humidity56%
Visibility6.2 mi
Dew point36°
Sat, 2458° / 48°0
58 °
Crystal Brook, Saturday, 24 October
Overcast. High 58°, low 48°.
Pressure30.53 inHg
Wind2 mph W
Humidity60%
Visibility6.2 mi
Dew point37°
Sun, 2560° / 50°0
60 °
Crystal Brook, Sunday, 25 October
Clear. High 60°, low 50°.
Pressure30.56 inHg
Wind0.7 mph NW
Humidity63%
Visibility6.2 mi
Dew point40°
Mon, 2661° / 52°0
61 °
Crystal Brook, Monday, 26 October
Clear. High 61°, low 52°.
Pressure30.39 inHg
Wind9.6 mph SW
Humidity75%
Visibility—
Dew point46°
Tue, 2759° / 54°0
59 °
Crystal Brook, Tuesday, 27 October
Partly cloudy. High 59°, low 54°.
Pressure30.36 inHg
Wind12.7 mph NE
Humidity77%
Visibility—
Dew point49°
Wed, 2862° / 54°0
62 °
Crystal Brook, Wednesday, 28 October
Overcast. High 62°, low 54°.
Pressure30.24 inHg
Wind11.1 mph S
Humidity55%
Visibility—
Dew point43°
Thu, 2960° / 54°0
60 °
Crystal Brook, Thursday, 29 October
Clear. High 60°, low 54°.
Pressure30.15 inHg
Wind14.9 mph N
Humidity64%
Visibility—
Dew point43°
Fri, 3055° / 49°0
55 °
Crystal Brook, Friday, 30 October
Clear. High 55°, low 49°.
Pressure30.36 inHg
Wind8.4 mph NE
Humidity53%
Visibility—
Dew point35°
Sat, 3158° / 51°0
58 °
Crystal Brook, Saturday, 31 October
Clear. High 58°, low 51°.
Pressure30.45 inHg
Wind9.4 mph E
Humidity61%
Visibility—
Dew point40°
Sun, 0158° / 51°0
58 °
Crystal Brook, Sunday, 1 November
Mostly clear. High 58°, low 51°.
Pressure30.47 inHg
Wind11.2 mph E
Humidity77%
Visibility—
Dew point47°
Mon, 0256° / 53°0.07
56 °
Crystal Brook, Monday, 2 November
Light rain. High 56°, low 53°.
Pressure30.09 inHg
Wind15.3 mph SW
Humidity83%
Visibility—
Dew point49°
Tue, 0356° / 47°0.04
56 °
Crystal Brook, Tuesday, 3 November
Light rain. High 56°, low 47°.
Pressure29.80 inHg
Wind30.5 mph W
Humidity56%
Visibility—
Dew point34°
Wed, 0451° / 44°0
51 °
Crystal Brook, Wednesday, 4 November
Clear. High 51°, low 44°.
Pressure30.06 inHg
Wind25 mph W
Humidity52%
Visibility—
Dew point30°
Thu, 0559° / 53°0.4
59 °
Crystal Brook, Thursday, 5 November
Rain. High 59°, low 53°.
Pressure30.03 inHg
Wind30.6 mph S
Humidity64%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0655° / 46°0.11
55 °
Crystal Brook, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low46°
Average precipitation0.11 in
Chance of precipitation30%
Record high75° (2024)
Record low35° (1962)
Sat, 0755° / 45°0.1
55 °
Crystal Brook, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.1 in
Chance of precipitation25%
Record high75° (2022)
Record low34° (2025)
Sun, 0854° / 44°0.17
54 °
Crystal Brook, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.17 in
Chance of precipitation30%
Record high72° (2020)
Record low32° (2019)
Mon, 0954° / 44°0.1
54 °
Crystal Brook, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.1 in
Chance of precipitation25%
Record high72° (2020)
Record low28° (2019)
Tue, 1055° / 44°0.17
55 °
Crystal Brook, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.17 in
Chance of precipitation42%
Record high69° (2020)
Record low28° (2017)
Wed, 1153° / 44°0.15
53 °
Crystal Brook, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.15 in
Chance of precipitation37%
Record high69° (2024)
Record low26° (2017)
Thu, 1252° / 42°0.16
52 °
Crystal Brook, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.16 in
Chance of precipitation38%
Record high69° (2022)
Record low30° (2019)
Fri, 1351° / 41°0.22
51 °
Crystal Brook, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.22 in
Chance of precipitation40%
Record high66° (1964)
Record low24° (2019)
Sat, 1451° / 41°0.11
51 °
Crystal Brook, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.11 in
Chance of precipitation22%
Record high64° (1989)
Record low26° (2019)
Sun, 1552° / 41°0.12
52 °
Crystal Brook, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.12 in
Chance of precipitation42%
Record high71° (1993)
Record low25° (1967)
Mon, 1651° / 41°0.14
51 °
Crystal Brook, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.14 in
Chance of precipitation38%
Record high65° (2006)
Record low24° (1967)
Tue, 1750° / 40°0.15
50 °
Crystal Brook, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.15 in
Chance of precipitation33%
Record high65° (2006)
Record low31° (1967)
Wed, 1850° / 41°0.08
50 °
Crystal Brook, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.08 in
Chance of precipitation27%
Record high63° (2024)
Record low29° (2014)
Thu, 1950° / 40°0.07
50 °
Crystal Brook, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.07 in
Chance of precipitation25%
Record high61° (2021)
Record low25° (2014)
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 Crystal Brook, 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 Crystal Brook, 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.