Monthly outlook for Sullivan, NY: average high 75.4°, average low 59.2°. That is 1.2° below the climate normal for August. Precipitation is expected on 8 days (about 1.2 inches), against a normal of 7 days and 2.1 inches. The warmest day looks like 9 August (88.8°), the coolest 23 August (49.9°).
75.4°/59.2°
Average high / low
−1.2°
Below normal
8 / 7
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
77.6°
78.4°
-0.5°
18 August – 27 August
71.8°
76.5°
-2.6°
28 August – 6 September
at normal
75.5°
—
August records over 66 years
95.5°9 August 2001All-time high
46.6°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Syracuse (14 mi).
Sun, 0989° / 68°0
89 °
Sullivan, Sunday, 9 August
Clear. High 89°, low 68°.
Pressure30.00 inHg
Wind11.5 mph W
Humidity53%
Visibility6.2 mi
Dew point59°
Mon, 1081° / 64°0.15
81 °
Sullivan, Monday, 10 August
Light rain. High 81°, low 64°.
Pressure29.94 inHg
Wind10.2 mph SW
Humidity64%
Visibility6.2 mi
Dew point66°
Tue, 1183° / 65°0.05
83 °
Sullivan, Tuesday, 11 August
Light rain. High 83°, low 65°.
Pressure29.91 inHg
Wind8 mph W
Humidity55%
Visibility6.2 mi
Dew point60°
Wed, 1281° / 65°0.16
81 °
Sullivan, Wednesday, 12 August
Light rain. High 81°, low 65°.
Pressure29.77 inHg
Wind2.8 mph N
Humidity64%
Visibility6.2 mi
Dew point65°
Thu, 1367° / 59°0.19
67 °
Sullivan, Thursday, 13 August
Light rain. High 67°, low 59°.
Pressure29.83 inHg
Wind15.2 mph NW
Humidity95%
Visibility—
Dew point59°
Fri, 1470° / 52°0
70 °
Sullivan, Friday, 14 August
Light rain. High 70°, low 52°.
Pressure29.97 inHg
Wind12.2 mph NW
Humidity45%
Visibility—
Dew point46°
Sat, 1571° / 52°0
71 °
Sullivan, Saturday, 15 August
Partly cloudy. High 71°, low 52°.
Pressure30.21 inHg
Wind11.5 mph NW
Humidity44%
Visibility—
Dew point46°
Sun, 1675° / 53°0
75 °
Sullivan, Sunday, 16 August
Partly cloudy. High 75°, low 53°.
Pressure30.27 inHg
Wind6.2 mph W
Humidity47%
Visibility—
Dew point51°
Mon, 1777° / 59°0
77 °
Sullivan, Monday, 17 August
Overcast. High 77°, low 59°.
Pressure30.09 inHg
Wind10.5 mph S
Humidity53%
Visibility—
Dew point55°
Tue, 1873° / 62°0.32
73 °
Sullivan, Tuesday, 18 August
Light rain. High 73°, low 62°.
Pressure29.91 inHg
Wind3.8 mph SE
Humidity73%
Visibility—
Dew point62°
Wed, 1974° / 58°0
74 °
Sullivan, Wednesday, 19 August
Overcast. High 74°, low 58°.
Pressure29.94 inHg
Wind10.2 mph NW
Humidity53%
Visibility—
Dew point54°
Thu, 2076° / 55°0
76 °
Sullivan, Thursday, 20 August
Partly cloudy. High 76°, low 55°.
Pressure29.97 inHg
Wind4.8 mph SE
Humidity47%
Visibility—
Dew point51°
Fri, 2170° / 59°0.01
70 °
Sullivan, Friday, 21 August
Light rain. High 70°, low 59°.
Pressure29.88 inHg
Wind7.1 mph S
Humidity82%
Visibility—
Dew point61°
Sat, 2272° / 57°0.04
72 °
Sullivan, Saturday, 22 August
Light rain. High 72°, low 57°.
Pressure29.80 inHg
Wind15.2 mph NW
Humidity67%
Visibility—
Dew point59°
Sun, 2366° / 50°0.1
66 °
Sullivan, Sunday, 23 August
Light rain. High 66°, low 50°.
Pressure30.03 inHg
Wind16.3 mph NW
Humidity43%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2476° / 62°0.12
76 °
Sullivan, Monday, 24 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.12 in
Chance of precipitation38%
Record high90° (2007)
Record low48° (1971)
Tue, 2577° / 62°0.11
77 °
Sullivan, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.11 in
Chance of precipitation37%
Record high92° (2007)
Record low49° (1971)
Wed, 2678° / 62°0.09
78 °
Sullivan, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation27%
Record high87° (2021)
Record low51° (1977)
Thu, 2777° / 63°0.15
77 °
Sullivan, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.15 in
Chance of precipitation50%
Record high89° (1993)
Record low49° (1969)
Fri, 2877° / 63°0.22
77 °
Sullivan, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.22 in
Chance of precipitation55%
Record high91° (2018)
Record low50° (1986)
Sat, 2976° / 62°0.15
76 °
Sullivan, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.15 in
Chance of precipitation48%
Record high90° (2007)
Record low47° (1982)
Sun, 3076° / 61°0.13
76 °
Sullivan, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.13 in
Chance of precipitation38%
Record high90° (1991)
Record low47° (1965)
Mon, 3176° / 61°0.12
76 °
Sullivan, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.12 in
Chance of precipitation40%
Record high91° (1993)
Record low48° (1965)
Tue, 0175° / 60°0.06
75 °
Sullivan, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.06 in
Chance of precipitation28%
Record high90° (2010)
Record low49° (1971)
Wed, 0275° / 60°0.13
75 °
Sullivan, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.13 in
Chance of precipitation37%
Record high89° (2010)
Record low46° (2017)
Thu, 0375° / 61°0.12
75 °
Sullivan, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.12 in
Chance of precipitation42%
Record high91° (2010)
Record low48° (1976)
Fri, 0475° / 61°0.1
75 °
Sullivan, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.1 in
Chance of precipitation32%
Record high91° (1999)
Record low47° (1987)
Sat, 0575° / 60°0.11
75 °
Sullivan, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.11 in
Chance of precipitation32%
Record high91° (1973)
Record low47° (2000)
Sun, 0675° / 60°0.15
75 °
Sullivan, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.15 in
Chance of precipitation37%
Record high90° (2023)
Record low48° (2000)
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 Sullivan, 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 Sullivan, 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.