Monthly outlook for Old Mastic, NY: average high 57.8°, average low 47.1°. That is 1.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 30 October (69.5°), the coolest 8 November (37.7°).
57.8°/47.1°
Average high / low
+1.4°
Above normal
3 / 5
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
29 October – 7 November
61.8°
56.5°
+2.9°
8 November – 17 November
51.2°
52.6°
-0.8°
18 November – 27 November
at normal
49.6°
—
October records over 66 years
83.8°2 October 2019All-time high
33.8°27 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Brookhaven (8 mi).
Fri, 3070° / 48°0
70 °
Old Mastic, Friday, 30 October
Clear. High 70°, low 48°.
Pressure30.03 inHg
Wind9.9 mph NW
Humidity55%
Visibility6.2 mi
Dew point52°
Sat, 3154° / 43°0
54 °
Old Mastic, Saturday, 31 October
Clear. High 54°, low 43°.
Pressure30.42 inHg
Wind8.5 mph NW
Humidity47%
Visibility6.2 mi
Dew point32°
Sun, 0157° / 41°0
57 °
Old Mastic, Sunday, 1 November
Mostly clear. High 57°, low 41°.
Pressure30.50 inHg
Wind3.9 mph NW
Humidity49%
Visibility6.2 mi
Dew point36°
Mon, 0263° / 47°0
63 °
Old Mastic, Monday, 2 November
Clear. High 63°, low 47°.
Pressure30.36 inHg
Wind7.3 mph SW
Humidity55%
Visibility6.2 mi
Dew point45°
Tue, 0366° / 50°0
66 °
Old Mastic, Tuesday, 3 November
Clear. High 66°, low 50°.
Pressure30.33 inHg
Wind6.8 mph SW
Humidity55%
Visibility—
Dew point44°
Wed, 0456° / 55°0.01
56 °
Old Mastic, Wednesday, 4 November
Light rain. High 56°, low 55°.
Pressure30.47 inHg
Wind15.3 mph E
Humidity79%
Visibility—
Dew point49°
Thu, 0561° / 57°0.07
61 °
Old Mastic, Thursday, 5 November
Light rain. High 61°, low 57°.
Pressure30.18 inHg
Wind14.4 mph SE
Humidity87%
Visibility—
Dew point55°
Fri, 0663° / 60°0.78
63 °
Old Mastic, Friday, 6 November
Rain. High 63°, low 60°.
Pressure29.65 inHg
Wind26.4 mph S
Humidity98%
Visibility—
Dew point62°
Sat, 0763° / 46°0.06
63 °
Old Mastic, Saturday, 7 November
Light rain. High 63°, low 46°.
Pressure29.56 inHg
Wind24.2 mph NW
Humidity77%
Visibility—
Dew point54°
Sun, 0848° / 38°0
48 °
Old Mastic, Sunday, 8 November
Clear. High 48°, low 38°.
Pressure30.03 inHg
Wind21.8 mph NW
Humidity55%
Visibility—
Dew point26°
Mon, 0953° / 41°0
53 °
Old Mastic, Monday, 9 November
Clear. High 53°, low 41°.
Pressure30.06 inHg
Wind17 mph NW
Humidity47%
Visibility—
Dew point26°
Tue, 1052° / 46°0
52 °
Old Mastic, Tuesday, 10 November
Overcast. High 52°, low 46°.
Pressure30.09 inHg
Wind11.9 mph N
Humidity42%
Visibility—
Dew point27°
Wed, 1152° / 49°0
52 °
Old Mastic, Wednesday, 11 November
Overcast. High 52°, low 49°.
Pressure29.91 inHg
Wind16.1 mph NE
Humidity63%
Visibility—
Dew point39°
Thu, 1250° / 45°0
50 °
Old Mastic, Thursday, 12 November
Overcast. High 50°, low 45°.
Pressure29.80 inHg
Wind17.1 mph N
Humidity60%
Visibility—
Dew point33°
Fri, 1352° / 43°0
52 °
Old Mastic, Friday, 13 November
Clear. High 52°, low 43°.
Pressure29.91 inHg
Wind14.9 mph NW
Humidity48%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 1451° / 42°0.11
51 °
Old Mastic, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.11 in
Chance of precipitation22%
Record high63° (1989)
Record low27° (2019)
Sun, 1552° / 42°0.12
52 °
Old Mastic, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.12 in
Chance of precipitation42%
Record high69° (1993)
Record low26° (1967)
Mon, 1651° / 42°0.15
51 °
Old Mastic, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.15 in
Chance of precipitation38%
Record high65° (2006)
Record low25° (1967)
Tue, 1751° / 42°0.15
51 °
Old Mastic, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.15 in
Chance of precipitation33%
Record high65° (2006)
Record low31° (2019)
Wed, 1851° / 42°0.07
51 °
Old Mastic, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.07 in
Chance of precipitation25%
Record high63° (2024)
Record low30° (2014)
Thu, 1951° / 42°0.07
51 °
Old Mastic, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.07 in
Chance of precipitation25%
Record high62° (2021)
Record low26° (2014)
Fri, 2050° / 41°0.13
50 °
Old Mastic, Friday, 20 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.13 in
Chance of precipitation28%
Record high65° (1985)
Record low29° (1984)
Sat, 2150° / 40°0.11
50 °
Old Mastic, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.11 in
Chance of precipitation32%
Record high62° (2020)
Record low22° (1987)
Sun, 2249° / 40°0.16
49 °
Old Mastic, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.16 in
Chance of precipitation40%
Record high60° (1991)
Record low20° (2018)
Mon, 2348° / 39°0.13
48 °
Old Mastic, Monday, 23 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.13 in
Chance of precipitation22%
Record high63° (1992)
Record low19° (2018)
Tue, 2449° / 40°0.1
49 °
Old Mastic, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.1 in
Chance of precipitation33%
Record high62° (1979)
Record low26° (2013)
Wed, 2549° / 39°0.15
49 °
Old Mastic, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.15 in
Chance of precipitation33%
Record high62° (1979)
Record low25° (2013)
Thu, 2650° / 41°0.22
50 °
Old Mastic, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.22 in
Chance of precipitation43%
Record high63° (1979)
Record low29° (2023)
Fri, 2750° / 41°0.13
50 °
Old Mastic, Friday, 27 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.13 in
Chance of precipitation35%
Record high61° (1986)
Record low28° (1978)
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 Old Mastic, 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 Old Mastic, 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.