Monthly outlook for Bonni Castle, NY: average high 76.1°, average low 64.1°. That is 0.4° below the climate normal for August. Precipitation is expected on 8 days (about 1.3 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 20 August (86.3°), the coolest 19 August (57.3°).
76.1°/64.1°
Average high / low
−0.4°
Below normal
8 / 6
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
74.5°
77.4°
-1.6°
19 August – 28 August
78.6°
76°
+1.5°
29 August – 7 September
at normal
74.6°
—
August records over 66 years
93.9°14 August 2002All-time high
46.9°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Sodus (6 mi).
Mon, 1086° / 69°0.18
86 °
Bonni Castle, Monday, 10 August
Light rain. High 86°, low 69°.
Pressure29.91 inHg
Wind8.7 mph S
Humidity95%
Visibility6.2 mi
Dew point65°
Tue, 1176° / 68°0.03
76 °
Bonni Castle, Tuesday, 11 August
Light rain. High 76°, low 68°.
Pressure29.88 inHg
Wind12.5 mph NW
Humidity61%
Visibility6.2 mi
Dew point61°
Wed, 1279° / 64°0.05
79 °
Bonni Castle, Wednesday, 12 August
Light rain. High 79°, low 64°.
Pressure29.74 inHg
Wind5.5 mph SE
Humidity56%
Visibility6.2 mi
Dew point58°
Thu, 1369° / 65°0.05
69 °
Bonni Castle, Thursday, 13 August
Light rain. High 69°, low 65°.
Pressure29.83 inHg
Wind19 mph NW
Humidity58%
Visibility—
Dew point52°
Fri, 1467° / 61°0.05
67 °
Bonni Castle, Friday, 14 August
Light rain. High 67°, low 61°.
Pressure30.06 inHg
Wind17.4 mph NW
Humidity56%
Visibility—
Dew point50°
Sat, 1570° / 62°0
70 °
Bonni Castle, Saturday, 15 August
Clear. High 70°, low 62°.
Pressure30.21 inHg
Wind16.7 mph NW
Humidity49%
Visibility—
Dew point48°
Sun, 1672° / 59°0
72 °
Bonni Castle, Sunday, 16 August
Overcast. High 72°, low 59°.
Pressure30.15 inHg
Wind7.9 mph W
Humidity66%
Visibility—
Dew point56°
Mon, 1771° / 59°0.05
71 °
Bonni Castle, Monday, 17 August
Light rain. High 71°, low 59°.
Pressure30.00 inHg
Wind6 mph S
Humidity64%
Visibility—
Dew point57°
Tue, 1871° / 61°0.01
71 °
Bonni Castle, Tuesday, 18 August
Light rain. High 71°, low 61°.
Pressure30.09 inHg
Wind9.2 mph N
Humidity66%
Visibility—
Dew point58°
Wed, 1978° / 57°0
78 °
Bonni Castle, Wednesday, 19 August
Overcast. High 78°, low 57°.
Pressure30.09 inHg
Wind6.9 mph SE
Humidity47%
Visibility—
Dew point54°
Thu, 2086° / 64°0
86 °
Bonni Castle, Thursday, 20 August
Overcast. High 86°, low 64°.
Pressure29.91 inHg
Wind8.7 mph S
Humidity44%
Visibility—
Dew point59°
Fri, 2181° / 73°0.37
81 °
Bonni Castle, Friday, 21 August
Rain. High 81°, low 73°.
Pressure29.80 inHg
Wind12.3 mph W
Humidity94%
Visibility—
Dew point74°
Sat, 2273° / 66°0
73 °
Bonni Castle, Saturday, 22 August
Partly cloudy. High 73°, low 66°.
Pressure30.00 inHg
Wind10 mph N
Humidity57%
Visibility—
Dew point56°
Sun, 2379° / 65°0.14
79 °
Bonni Castle, Sunday, 23 August
Light rain. High 79°, low 65°.
Pressure29.94 inHg
Wind9.1 mph NE
Humidity71%
Visibility—
Dew point63°
Mon, 2474° / 66°0.39
74 °
Bonni Castle, Monday, 24 August
Rain. High 74°, low 66°.
Pressure30.06 inHg
Wind16.4 mph N
Humidity60%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2576° / 62°0.12
76 °
Bonni Castle, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.12 in
Chance of precipitation32%
Record high90° (2021)
Record low52° (1971)
Wed, 2677° / 63°0.07
77 °
Bonni Castle, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.07 in
Chance of precipitation33%
Record high87° (2021)
Record low52° (1989)
Thu, 2776° / 63°0.13
76 °
Bonni Castle, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.13 in
Chance of precipitation42%
Record high92° (2024)
Record low51° (2017)
Fri, 2876° / 64°0.17
76 °
Bonni Castle, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.17 in
Chance of precipitation50%
Record high92° (2018)
Record low51° (1986)
Sat, 2975° / 63°0.12
75 °
Bonni Castle, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high75°
Average low63°
Average precipitation0.12 in
Chance of precipitation40%
Record high93° (2022)
Record low48° (1982)
Sun, 3075° / 62°0.09
75 °
Bonni Castle, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.09 in
Chance of precipitation33%
Record high88° (1991)
Record low47° (1965)
Mon, 3175° / 62°0.13
75 °
Bonni Castle, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.13 in
Chance of precipitation37%
Record high89° (1962)
Record low50° (1976)
Tue, 0174° / 61°0.06
74 °
Bonni Castle, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.06 in
Chance of precipitation25%
Record high90° (2010)
Record low51° (2025)
Wed, 0275° / 61°0.13
75 °
Bonni Castle, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.13 in
Chance of precipitation37%
Record high87° (2010)
Record low47° (2017)
Thu, 0375° / 61°0.1
75 °
Bonni Castle, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.1 in
Chance of precipitation37%
Record high91° (2018)
Record low49° (1976)
Fri, 0474° / 62°0.11
74 °
Bonni Castle, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.11 in
Chance of precipitation35%
Record high89° (1973)
Record low50° (1987)
Sat, 0574° / 61°0.11
74 °
Bonni Castle, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (2018)
Record low50° (1963)
Sun, 0674° / 61°0.1
74 °
Bonni Castle, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.1 in
Chance of precipitation33%
Record high89° (2023)
Record low49° (2000)
Mon, 0774° / 60°0.13
74 °
Bonni Castle, Monday, 7 September
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.13 in
Chance of precipitation38%
Record high92° (2007)
Record low49° (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 Bonni Castle, 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 Bonni Castle, 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.