Monthly outlook for Old Mastic, NY: average high 57.9°, average low 47.9°. That is 1.2° above the climate normal for October. Precipitation is expected on 2 days (about 2.1 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (69.9°), the coolest 28 October (37.9°).
57.9°/47.9°
Average high / low
+1.2°
Above normal
2 / 5
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
28 October – 6 November
61.4°
56.9°
+2.5°
7 November – 16 November
52.2°
53°
-0.4°
17 November – 26 November
at normal
49.7°
—
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).
Thu, 2966° / 44°0
66 °
Old Mastic, Thursday, 29 October
Clear. High 66°, low 44°.
Pressure30.27 inHg
Wind7.5 mph SW
Humidity62%
Visibility6.2 mi
Dew point50°
Fri, 3070° / 50°0
70 °
Old Mastic, Friday, 30 October
Clear. High 70°, low 50°.
Pressure30.06 inHg
Wind9.3 mph NW
Humidity58%
Visibility6.2 mi
Dew point53°
Sat, 3156° / 46°0
56 °
Old Mastic, Saturday, 31 October
Mostly clear. High 56°, low 46°.
Pressure30.39 inHg
Wind9.5 mph N
Humidity49%
Visibility6.2 mi
Dew point36°
Sun, 0158° / 43°0
58 °
Old Mastic, Sunday, 1 November
Overcast. High 58°, low 43°.
Pressure30.45 inHg
Wind3 mph SW
Humidity49%
Visibility6.2 mi
Dew point37°
Mon, 0264° / 48°0
64 °
Old Mastic, Monday, 2 November
Clear. High 64°, low 48°.
Pressure30.36 inHg
Wind6.5 mph W
Humidity61%
Visibility—
Dew point45°
Tue, 0359° / 54°0.01
59 °
Old Mastic, Tuesday, 3 November
Light rain. High 59°, low 54°.
Pressure30.21 inHg
Wind22.5 mph E
Humidity77%
Visibility—
Dew point50°
Wed, 0456° / 52°0.02
56 °
Old Mastic, Wednesday, 4 November
Light rain. High 56°, low 52°.
Pressure30.36 inHg
Wind22 mph E
Humidity64%
Visibility—
Dew point41°
Thu, 0563° / 56°0.01
63 °
Old Mastic, Thursday, 5 November
Light rain. High 63°, low 56°.
Pressure30.09 inHg
Wind23.7 mph SE
Humidity93%
Visibility—
Dew point58°
Fri, 0664° / 55°0.77
64 °
Old Mastic, Friday, 6 November
Heavy rain. High 64°, low 55°.
Pressure29.47 inHg
Wind27.9 mph SE
Humidity82%
Visibility—
Dew point55°
Sat, 0753° / 46°0
53 °
Old Mastic, Saturday, 7 November
Clear. High 53°, low 46°.
Pressure30.03 inHg
Wind18.2 mph N
Humidity48%
Visibility—
Dew point29°
Sun, 0848° / 44°0
48 °
Old Mastic, Sunday, 8 November
Overcast. High 48°, low 44°.
Pressure30.33 inHg
Wind11.3 mph N
Humidity54%
Visibility—
Dew point30°
Mon, 0949° / 43°0
49 °
Old Mastic, Monday, 9 November
Clear. High 49°, low 43°.
Pressure30.42 inHg
Wind9.1 mph N
Humidity51%
Visibility—
Dew point29°
Tue, 1050° / 43°0
50 °
Old Mastic, Tuesday, 10 November
Clear. High 50°, low 43°.
Pressure30.36 inHg
Wind7.1 mph S
Humidity45%
Visibility—
Dew point27°
Wed, 1156° / 50°0
56 °
Old Mastic, Wednesday, 11 November
Overcast. High 56°, low 50°.
Pressure30.18 inHg
Wind19.1 mph E
Humidity68%
Visibility—
Dew point44°
Thu, 1258° / 54°1.3
58 °
Old Mastic, Thursday, 12 November
Rain. High 58°, low 54°.
Pressure29.88 inHg
Wind41.8 mph E
Humidity92%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 1351° / 42°0.23
51 °
Old Mastic, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.23 in
Chance of precipitation40%
Record high65° (1964)
Record low24° (2019)
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)
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.