Monthly outlook for Ross, CA: average high 68.5°, average low 55.9°. That is 2.1° below the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.0 inches. The warmest day looks like 9 August (85.5°), the coolest 10 August (54.7°).
68.5°/55.9°
Average high / low
−2.1°
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
68.5°
72.5°
-2.2°
18 August – 27 August
68.4°
72.1°
-2.1°
28 August – 6 September
at normal
74.1°
—
August records over 66 years
96.6°14 August 2020All-time high
47.5°10 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Marin City (7 mi).
Sun, 0986° / 58°0
86 °
Ross, Sunday, 9 August
Clear. High 86°, low 58°.
Pressure29.83 inHg
Wind5.8 mph S
Humidity60%
Visibility6.2 mi
Dew point52°
Mon, 1067° / 55°0
67 °
Ross, Monday, 10 August
Partly cloudy. High 67°, low 55°.
Pressure29.88 inHg
Wind10.5 mph S
Humidity69%
Visibility6.2 mi
Dew point53°
Tue, 1168° / 55°0
68 °
Ross, Tuesday, 11 August
Clear. High 68°, low 55°.
Pressure29.94 inHg
Wind10.6 mph S
Humidity72%
Visibility6.2 mi
Dew point54°
Wed, 1264° / 55°0
64 °
Ross, Wednesday, 12 August
Partly cloudy. High 64°, low 55°.
Pressure29.85 inHg
Wind10.5 mph S
Humidity76%
Visibility6.2 mi
Dew point55°
Thu, 1363° / 57°0
63 °
Ross, Thursday, 13 August
Overcast. High 63°, low 57°.
Pressure29.85 inHg
Wind13.6 mph SW
Humidity76%
Visibility—
Dew point54°
Fri, 1463° / 57°0
63 °
Ross, Friday, 14 August
Overcast. High 63°, low 57°.
Pressure29.94 inHg
Wind11.2 mph SW
Humidity77%
Visibility—
Dew point55°
Sat, 1565° / 56°0
65 °
Ross, Saturday, 15 August
Clear. High 65°, low 56°.
Pressure30.03 inHg
Wind11 mph SW
Humidity66%
Visibility—
Dew point53°
Sun, 1667° / 55°0
67 °
Ross, Sunday, 16 August
Overcast. High 67°, low 55°.
Pressure30.03 inHg
Wind10.6 mph SW
Humidity62%
Visibility—
Dew point53°
Mon, 1766° / 55°0
66 °
Ross, Monday, 17 August
Overcast. High 66°, low 55°.
Pressure30.06 inHg
Wind10.4 mph SW
Humidity69%
Visibility—
Dew point54°
Tue, 1869° / 55°0
69 °
Ross, Tuesday, 18 August
Mostly clear. High 69°, low 55°.
Pressure30.03 inHg
Wind10.7 mph W
Humidity59%
Visibility—
Dew point52°
Wed, 1969° / 55°0
69 °
Ross, Wednesday, 19 August
Clear. High 69°, low 55°.
Pressure29.97 inHg
Wind13.6 mph W
Humidity61%
Visibility—
Dew point53°
Thu, 2068° / 56°0
68 °
Ross, Thursday, 20 August
Partly cloudy. High 68°, low 56°.
Pressure29.91 inHg
Wind9.4 mph SW
Humidity71%
Visibility—
Dew point57°
Fri, 2170° / 56°0
70 °
Ross, Friday, 21 August
Mostly clear. High 70°, low 56°.
Pressure29.88 inHg
Wind9.2 mph SW
Humidity64%
Visibility—
Dew point55°
Sat, 2268° / 56°0
68 °
Ross, Saturday, 22 August
Overcast. High 68°, low 56°.
Pressure29.85 inHg
Wind10.1 mph SW
Humidity68%
Visibility—
Dew point56°
Sun, 2366° / 55°0
66 °
Ross, Sunday, 23 August
Overcast. High 66°, low 55°.
Pressure29.88 inHg
Wind11.1 mph SW
Humidity71%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2472° / 56°0
72 °
Ross, Monday, 24 August
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0 in
Chance of precipitation2%
Record high89° (2010)
Record low51° (1988)
Tue, 2572° / 56°0
72 °
Ross, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high85° (1988)
Record low50° (1960)
Wed, 2673° / 55°0
73 °
Ross, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0 in
Chance of precipitation0%
Record high88° (2017)
Record low48° (2005)
Thu, 2774° / 56°0
74 °
Ross, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high93° (2017)
Record low51° (2009)
Fri, 2874° / 56°0
74 °
Ross, Friday, 28 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high90° (2021)
Record low51° (1960)
Sat, 2973° / 56°0
73 °
Ross, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high92° (1968)
Record low52° (1964)
Sun, 3073° / 57°0
73 °
Ross, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0 in
Chance of precipitation2%
Record high92° (2025)
Record low52° (1960)
Mon, 3174° / 56°0
74 °
Ross, Monday, 31 August
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation3%
Record high95° (2017)
Record low51° (2002)
Tue, 0175° / 56°0
75 °
Ross, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0 in
Chance of precipitation2%
Record high103° (2017)
Record low50° (1973)
Wed, 0274° / 56°0
74 °
Ross, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation2%
Record high103° (2017)
Record low51° (1975)
Thu, 0374° / 56°0
74 °
Ross, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high92° (2024)
Record low49° (1973)
Fri, 0474° / 56°0
74 °
Ross, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high91° (2022)
Record low51° (1989)
Sat, 0575° / 56°0
75 °
Ross, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high101° (2022)
Record low49° (1969)
Sun, 0675° / 56°0
75 °
Ross, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high106° (2022)
Record low49° (1969)
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 Ross, 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 Ross, 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.