Monthly outlook for Bonny Doon, CA: average high 68.4°, average low 54.2°. That is 0.3° below the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 9 August (86.7°), the coolest 21 August (51.7°).
68.4°/54.2°
Average high / low
−0.3°
Below normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
70.2°
69.1°
+0.6°
18 August – 27 August
65.4°
68.8°
-1.9°
28 August – 6 September
at normal
70.2°
—
August records over 66 years
99.5°19 August 2020All-time high
50.4°1 August 2011All-time low
Climate normals and records are computed from the nearest reference point — Santa Cruz (7 mi).
Sun, 0987° / 59°0
87 °
Bonny Doon, Sunday, 9 August
Mostly clear. High 87°, low 59°.
Pressure29.85 inHg
Wind5.8 mph W
Humidity62%
Visibility6.2 mi
Dew point53°
Mon, 1076° / 55°0
76 °
Bonny Doon, Monday, 10 August
Overcast. High 76°, low 55°.
Pressure29.91 inHg
Wind6 mph SW
Humidity66%
Visibility5.2 mi
Dew point53°
Tue, 1169° / 54°0
69 °
Bonny Doon, Tuesday, 11 August
Partly cloudy. High 69°, low 54°.
Pressure29.97 inHg
Wind5.5 mph SW
Humidity62%
Visibility6.2 mi
Dew point52°
Wed, 1265° / 54°0
65 °
Bonny Doon, Wednesday, 12 August
Overcast. High 65°, low 54°.
Pressure29.91 inHg
Wind6.4 mph SW
Humidity70%
Visibility6.2 mi
Dew point53°
Thu, 1363° / 55°0
63 °
Bonny Doon, Thursday, 13 August
Overcast. High 63°, low 55°.
Pressure29.88 inHg
Wind9.5 mph S
Humidity72%
Visibility—
Dew point53°
Fri, 1464° / 55°0
64 °
Bonny Doon, Friday, 14 August
Mostly clear. High 64°, low 55°.
Pressure29.97 inHg
Wind7.3 mph SE
Humidity67%
Visibility—
Dew point52°
Sat, 1565° / 54°0
65 °
Bonny Doon, Saturday, 15 August
Mostly clear. High 65°, low 54°.
Pressure30.03 inHg
Wind7 mph W
Humidity67%
Visibility—
Dew point53°
Sun, 1667° / 53°0
67 °
Bonny Doon, Sunday, 16 August
Partly cloudy. High 67°, low 53°.
Pressure30.06 inHg
Wind8.8 mph W
Humidity62%
Visibility—
Dew point52°
Mon, 1766° / 55°0
66 °
Bonny Doon, Monday, 17 August
Overcast. High 66°, low 55°.
Pressure30.06 inHg
Wind9.6 mph NW
Humidity62%
Visibility—
Dew point52°
Tue, 1870° / 55°0
70 °
Bonny Doon, Tuesday, 18 August
Overcast. High 70°, low 55°.
Pressure30.03 inHg
Wind15.9 mph NW
Humidity57%
Visibility—
Dew point52°
Wed, 1969° / 53°0
69 °
Bonny Doon, Wednesday, 19 August
Clear. High 69°, low 53°.
Pressure29.97 inHg
Wind16.9 mph NW
Humidity55%
Visibility—
Dew point50°
Thu, 2062° / 52°0
62 °
Bonny Doon, Thursday, 20 August
Overcast. High 62°, low 52°.
Pressure29.97 inHg
Wind14.7 mph NW
Humidity74%
Visibility—
Dew point52°
Fri, 2164° / 52°0
64 °
Bonny Doon, Friday, 21 August
Partly cloudy. High 64°, low 52°.
Pressure29.91 inHg
Wind6.9 mph SW
Humidity68%
Visibility—
Dew point52°
Sat, 2263° / 54°0
63 °
Bonny Doon, Saturday, 22 August
Overcast. High 63°, low 54°.
Pressure30.00 inHg
Wind6.9 mph S
Humidity69%
Visibility—
Dew point52°
Sun, 2365° / 53°0
65 °
Bonny Doon, Sunday, 23 August
Partly cloudy. High 65°, low 53°.
Pressure29.94 inHg
Wind6.7 mph SW
Humidity67%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2469° / 58°0
69 °
Bonny Doon, Monday, 24 August
Climate normal for this date — 60-year average.
Average high69°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high82° (2010)
Record low52° (1966)
Tue, 2568° / 57°0
68 °
Bonny Doon, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high68°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high79° (2024)
Record low52° (2024)
Wed, 2669° / 57°0
69 °
Bonny Doon, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high69°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high83° (2024)
Record low53° (2018)
Thu, 2770° / 57°0
70 °
Bonny Doon, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high70°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high87° (2023)
Record low52° (1973)
Fri, 2871° / 58°0
71 °
Bonny Doon, Friday, 28 August
Climate normal for this date — 60-year average.
Average high71°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high87° (2023)
Record low52° (2020)
Sat, 2970° / 58°0
70 °
Bonny Doon, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high70°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high87° (2023)
Record low52° (1960)
Sun, 3070° / 58°0
70 °
Bonny Doon, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high70°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high93° (2025)
Record low52° (1960)
Mon, 3169° / 57°0
69 °
Bonny Doon, Monday, 31 August
Climate normal for this date — 60-year average.
Average high69°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high96° (2025)
Record low52° (2020)
Tue, 0171° / 58°0
71 °
Bonny Doon, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high96° (2017)
Record low51° (2011)
Wed, 0270° / 58°0
70 °
Bonny Doon, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high70°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high100° (2017)
Record low53° (2021)
Thu, 0370° / 58°0
70 °
Bonny Doon, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high70°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high91° (2022)
Record low52° (2021)
Fri, 0470° / 58°0
70 °
Bonny Doon, Friday, 4 September
Climate normal for this date — 60-year average.
Average high70°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high87° (2022)
Record low53° (1973)
Sat, 0571° / 58°0
71 °
Bonny Doon, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high71°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high97° (2022)
Record low51° (1965)
Sun, 0671° / 58°0
71 °
Bonny Doon, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high71°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high101° (2020)
Record low52° (2001)
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 Bonny Doon, CA 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 Bonny Doon, CA 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.