Monthly outlook for Big Island, NY: average high 83.6°, average low 61.2°. That is 2° above the climate normal for August. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 23 August (94.2°), the coolest 15 August (50°).
83.6°/61.2°
Average high / low
+2°
Above normal
3 / 6
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80.3°
80.8°
-0.3°
19 August – 28 August
89.1°
79.1°
+5.5°
29 August – 7 September
at normal
77.5°
—
August records over 66 years
99.3°2 August 2006All-time high
45.3°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Florida (3 mi).
Mon, 1085° / 68°0
85 °
Big Island, Monday, 10 August
Overcast. High 85°, low 68°.
Pressure29.97 inHg
Wind7.4 mph SW
Humidity49%
Visibility6.2 mi
Dew point62°
Tue, 1186° / 66°0.17
86 °
Big Island, Tuesday, 11 August
Rain. High 86°, low 66°.
Pressure29.85 inHg
Wind12 mph NW
Humidity45%
Visibility6.2 mi
Dew point59°
Wed, 1277° / 63°0.02
77 °
Big Island, Wednesday, 12 August
Light rain. High 77°, low 63°.
Pressure29.77 inHg
Wind3.6 mph NE
Humidity64%
Visibility6.2 mi
Dew point59°
Thu, 1380° / 60°0.04
80 °
Big Island, Thursday, 13 August
Light rain. High 80°, low 60°.
Pressure29.74 inHg
Wind14.2 mph NW
Humidity36%
Visibility—
Dew point49°
Fri, 1473° / 53°0
73 °
Big Island, Friday, 14 August
Clear. High 73°, low 53°.
Pressure29.97 inHg
Wind15.5 mph NW
Humidity37%
Visibility—
Dew point44°
Sat, 1575° / 50°0
75 °
Big Island, Saturday, 15 August
Clear. High 75°, low 50°.
Pressure30.06 inHg
Wind15.9 mph NW
Humidity36%
Visibility—
Dew point44°
Sun, 1678° / 50°0
78 °
Big Island, Sunday, 16 August
Overcast. High 78°, low 50°.
Pressure30.12 inHg
Wind6.4 mph N
Humidity32%
Visibility—
Dew point44°
Mon, 1780° / 56°0
80 °
Big Island, Monday, 17 August
Overcast. High 80°, low 56°.
Pressure29.97 inHg
Wind8.3 mph SW
Humidity38%
Visibility—
Dew point50°
Tue, 1884° / 56°0
84 °
Big Island, Tuesday, 18 August
Mostly clear. High 84°, low 56°.
Pressure30.00 inHg
Wind4.5 mph NW
Humidity38%
Visibility—
Dew point53°
Wed, 1985° / 63°0
85 °
Big Island, Wednesday, 19 August
Overcast. High 85°, low 63°.
Pressure30.09 inHg
Wind5.5 mph S
Humidity45%
Visibility—
Dew point59°
Thu, 2088° / 62°0
88 °
Big Island, Thursday, 20 August
Partly cloudy. High 88°, low 62°.
Pressure30.00 inHg
Wind7.2 mph SW
Humidity37%
Visibility—
Dew point56°
Fri, 2191° / 67°0.11
91 °
Big Island, Friday, 21 August
Light rain. High 91°, low 67°.
Pressure29.83 inHg
Wind11.8 mph SW
Humidity47%
Visibility—
Dew point65°
Sat, 2291° / 68°0
91 °
Big Island, Saturday, 22 August
Mostly clear. High 91°, low 68°.
Pressure29.88 inHg
Wind7.4 mph NW
Humidity34%
Visibility—
Dew point56°
Sun, 2394° / 62°0.01
94 °
Big Island, Sunday, 23 August
Light rain. High 94°, low 62°.
Pressure29.91 inHg
Wind6.9 mph S
Humidity29%
Visibility—
Dew point53°
Mon, 2485° / 68°0.19
85 °
Big Island, Monday, 24 August
Light rain. High 85°, low 68°.
Pressure29.97 inHg
Wind10.9 mph NE
Humidity57%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 61°0.09
80 °
Big Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low61°
Average precipitation0.09 in
Chance of precipitation28%
Record high92° (1968)
Record low51° (1987)
Wed, 2680° / 61°0.08
80 °
Big Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low61°
Average precipitation0.08 in
Chance of precipitation23%
Record high91° (1993)
Record low51° (1963)
Thu, 2780° / 63°0.2
80 °
Big Island, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.2 in
Chance of precipitation37%
Record high94° (1993)
Record low52° (2017)
Fri, 2880° / 64°0.25
80 °
Big Island, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.25 in
Chance of precipitation38%
Record high93° (1993)
Record low51° (2025)
Sat, 2979° / 63°0.15
79 °
Big Island, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.15 in
Chance of precipitation33%
Record high90° (1973)
Record low46° (1982)
Sun, 3079° / 62°0.08
79 °
Big Island, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.08 in
Chance of precipitation27%
Record high92° (1973)
Record low45° (1986)
Mon, 3178° / 61°0.06
78 °
Big Island, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.06 in
Chance of precipitation25%
Record high92° (1973)
Record low46° (1965)
Tue, 0177° / 61°0.14
77 °
Big Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.14 in
Chance of precipitation28%
Record high91° (2010)
Record low49° (2017)
Wed, 0277° / 60°0.14
77 °
Big Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.14 in
Chance of precipitation33%
Record high94° (2010)
Record low46° (2017)
Thu, 0378° / 60°0.11
78 °
Big Island, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (2015)
Record low47° (1967)
Fri, 0477° / 61°0.14
77 °
Big Island, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.14 in
Chance of precipitation30%
Record high91° (1973)
Record low49° (1987)
Sat, 0577° / 61°0.09
77 °
Big Island, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation28%
Record high91° (2023)
Record low49° (1974)
Sun, 0676° / 60°0.23
76 °
Big Island, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.23 in
Chance of precipitation30%
Record high91° (2023)
Record low47° (1984)
Mon, 0777° / 59°0.14
77 °
Big Island, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.14 in
Chance of precipitation35%
Record high93° (2015)
Record low44° (1984)
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 Big Island, 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 Big Island, 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.