Monthly outlook for Acalanes Ridge, CA: average high 78.6°, average low 58.8°. That is 2.3° 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 (86.9°), the coolest 24 August (56.3°).
78.6°/58.8°
Average high / low
−2.3°
Below normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.5°
83.2°
-2.1°
19 August – 28 August
77.1°
82.6°
-3.1°
29 August – 7 September
at normal
84.4°
—
August records over 66 years
103.8°16 August 2020All-time high
51.3°10 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Pacheco (6 mi).
Mon, 1082° / 59°0
82 °
Acalanes Ridge, Monday, 10 August
Overcast. High 82°, low 59°.
Pressure29.85 inHg
Wind7 mph W
Humidity35%
Visibility6.2 mi
Dew point48°
Tue, 1184° / 60°0
84 °
Acalanes Ridge, Tuesday, 11 August
Clear. High 84°, low 60°.
Pressure29.91 inHg
Wind5.6 mph W
Humidity31%
Visibility6.2 mi
Dew point47°
Wed, 1282° / 59°0
82 °
Acalanes Ridge, Wednesday, 12 August
Clear. High 82°, low 59°.
Pressure29.83 inHg
Wind6.1 mph W
Humidity37%
Visibility6.2 mi
Dew point49°
Thu, 1377° / 58°0
77 °
Acalanes Ridge, Thursday, 13 August
Clear. High 77°, low 58°.
Pressure29.83 inHg
Wind11.9 mph W
Humidity43%
Visibility—
Dew point51°
Fri, 1477° / 58°0
77 °
Acalanes Ridge, Friday, 14 August
Clear. High 77°, low 58°.
Pressure29.94 inHg
Wind10.3 mph W
Humidity41%
Visibility—
Dew point50°
Sat, 1579° / 58°0
79 °
Acalanes Ridge, Saturday, 15 August
Mostly clear. High 79°, low 58°.
Pressure30.00 inHg
Wind10.4 mph W
Humidity38%
Visibility—
Dew point49°
Sun, 1677° / 60°0
77 °
Acalanes Ridge, Sunday, 16 August
Overcast. High 77°, low 60°.
Pressure30.06 inHg
Wind11.4 mph W
Humidity42%
Visibility—
Dew point51°
Mon, 1773° / 58°0
73 °
Acalanes Ridge, Monday, 17 August
Overcast. High 73°, low 58°.
Pressure30.09 inHg
Wind11.8 mph W
Humidity48%
Visibility—
Dew point50°
Tue, 1876° / 59°0
76 °
Acalanes Ridge, Tuesday, 18 August
Mostly clear. High 76°, low 59°.
Pressure30.00 inHg
Wind10.6 mph W
Humidity52%
Visibility—
Dew point55°
Wed, 1978° / 63°0
78 °
Acalanes Ridge, Wednesday, 19 August
Clear. High 78°, low 63°.
Pressure29.94 inHg
Wind9.8 mph SW
Humidity51%
Visibility—
Dew point56°
Thu, 2077° / 62°0
77 °
Acalanes Ridge, Thursday, 20 August
Overcast. High 77°, low 62°.
Pressure29.97 inHg
Wind9.6 mph SW
Humidity51%
Visibility—
Dew point55°
Fri, 2173° / 58°0
73 °
Acalanes Ridge, Friday, 21 August
Overcast. High 73°, low 58°.
Pressure29.94 inHg
Wind10.8 mph SW
Humidity43%
Visibility—
Dew point48°
Sat, 2278° / 58°0
78 °
Acalanes Ridge, Saturday, 22 August
Overcast. High 78°, low 58°.
Pressure29.94 inHg
Wind9.6 mph W
Humidity37%
Visibility—
Dew point47°
Sun, 2378° / 58°0
78 °
Acalanes Ridge, Sunday, 23 August
Partly cloudy. High 78°, low 58°.
Pressure29.91 inHg
Wind9.7 mph W
Humidity39%
Visibility—
Dew point49°
Mon, 2479° / 56°0
79 °
Acalanes Ridge, Monday, 24 August
Clear. High 79°, low 56°.
Pressure29.85 inHg
Wind9.4 mph SW
Humidity34%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 58°0
82 °
Acalanes Ridge, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high99° (1988)
Record low54° (2005)
Wed, 2683° / 57°0
83 °
Acalanes Ridge, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high99° (2017)
Record low53° (2005)
Thu, 2785° / 58°0
85 °
Acalanes Ridge, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high104° (2017)
Record low54° (1960)
Fri, 2885° / 58°0
85 °
Acalanes Ridge, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high102° (2021)
Record low53° (1960)
Sat, 2983° / 58°0
83 °
Acalanes Ridge, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high100° (1977)
Record low53° (1980)
Sun, 3083° / 58°0
83 °
Acalanes Ridge, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0 in
Chance of precipitation3%
Record high98° (2023)
Record low53° (2010)
Mon, 3184° / 58°0
84 °
Acalanes Ridge, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high98° (2025)
Record low52° (1970)
Tue, 0185° / 58°0
85 °
Acalanes Ridge, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high107° (2017)
Record low53° (1973)
Wed, 0285° / 58°0
85 °
Acalanes Ridge, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high107° (2017)
Record low53° (1960)
Thu, 0384° / 58°0
84 °
Acalanes Ridge, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high84°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high98° (2024)
Record low51° (2000)
Fri, 0485° / 58°0
85 °
Acalanes Ridge, Friday, 4 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high103° (2022)
Record low53° (1960)
Sat, 0585° / 58°0
85 °
Acalanes Ridge, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high111° (2022)
Record low52° (1960)
Sun, 0685° / 58°0
85 °
Acalanes Ridge, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high111° (2022)
Record low52° (1980)
Mon, 0785° / 58°0
85 °
Acalanes Ridge, Monday, 7 September
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high110° (2020)
Record low53° (1989)
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 Acalanes Ridge, 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 Acalanes Ridge, 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.