As of 21:47 PDT

Weather in Rossmoor, CA

73°

Rossmoor, Saturday, 8 August, 21:47

Clear. Feels like 74°. High 98°, low 71°.

Pressure29.88 inHg

Wind3 mph W

Humidity83%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Monthly outlook for Rossmoor, CA: average high 82.2°, average low 70.9°. That is 0.2° above 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 8 August (98.5°), the coolest 9 August (69.3°).

82.2°/70.9°

Average high / low

+0.2°

Above 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	83.9°	82.1°	+1°
18 August – 27 August	79.4°	82.3°	-1.6°
28 August – 6 September	at normal	83.8°	—

August records over 66 years

102.2°31 August 2017All-time high

55.4°9 August 2010All-time low

Sun, 0995° / 69°

95 °

Rossmoor, Sunday, 9 August

Clear. High 95°, low 69°.

Pressure29.85 inHg

Wind8.7 mph SW

Humidity54%

Visibility3.7 mi

Dew point61°

Mon, 1088° / 71°

88 °

Rossmoor, Monday, 10 August

Overcast. High 88°, low 71°.

Pressure29.91 inHg

Wind8.5 mph SW

Humidity54%

Visibility3.8 mi

Dew point62°

Tue, 1181° / 73°

81 °

Rossmoor, Tuesday, 11 August

Overcast. High 81°, low 73°.

Pressure29.94 inHg

Wind8.7 mph SW

Humidity49%

Visibility6.2 mi

Dew point60°

Wed, 1280° / 71°

80 °

Rossmoor, Wednesday, 12 August

Clear. High 80°, low 71°.

Pressure29.88 inHg

Wind9.4 mph SW

Humidity53%

Visibility6.2 mi

Dew point60°

Thu, 1377° / 70°

77 °

Rossmoor, Thursday, 13 August

Overcast. High 77°, low 70°.

Pressure29.91 inHg

Wind11.2 mph SW

Humidity63%

Visibility—

Dew point61°

Fri, 1476° / 69°

76 °

Rossmoor, Friday, 14 August

Overcast. High 76°, low 69°.

Pressure29.97 inHg

Wind9.3 mph SW

Humidity63%

Visibility—

Dew point60°

Sat, 1580° / 70°

80 °

Rossmoor, Saturday, 15 August

Clear. High 80°, low 70°.

Pressure30.00 inHg

Wind12.9 mph W

Humidity57%

Visibility—

Dew point59°

Sun, 1681° / 70°

81 °

Rossmoor, Sunday, 16 August

Overcast. High 81°, low 70°.

Pressure30.03 inHg

Wind10.9 mph SW

Humidity52%

Visibility—

Dew point58°

Mon, 1784° / 72°

84 °

Rossmoor, Monday, 17 August

Mostly clear. High 84°, low 72°.

Pressure30.00 inHg

Wind11.2 mph W

Humidity49%

Visibility—

Dew point57°

Tue, 1882° / 73°

82 °

Rossmoor, Tuesday, 18 August

Overcast. High 82°, low 73°.

Pressure29.94 inHg

Wind11.1 mph SW

Humidity51%

Visibility—

Dew point59°

Wed, 1983° / 72°

83 °

Rossmoor, Wednesday, 19 August

Overcast. High 83°, low 72°.

Pressure29.91 inHg

Wind9.8 mph S

Humidity57%

Visibility—

Dew point62°

Thu, 2079° / 72°

79 °

Rossmoor, Thursday, 20 August

Clear. High 79°, low 72°.

Pressure29.91 inHg

Wind11.5 mph S

Humidity62%

Visibility—

Dew point63°

Fri, 2177° / 71°

77 °

Rossmoor, Friday, 21 August

Mostly clear. High 77°, low 71°.

Pressure29.91 inHg

Wind10.7 mph S

Humidity62%

Visibility—

Dew point62°

Sat, 2277° / 70°

77 °

Rossmoor, Saturday, 22 August

Clear. High 77°, low 70°.

Pressure29.97 inHg

Wind10.3 mph SW

Humidity60%

Visibility—

Dew point59°

Sun, 2378° / 69°

78 °

Rossmoor, Sunday, 23 August

Clear. High 78°, low 69°.

Pressure29.94 inHg

Wind11.1 mph SW

Humidity59%

Visibility—

Dew point59°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2483° / 64°

83 °

Rossmoor, Monday, 24 August

Climate normal for this date — 60-year average.

Average high83°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high94° (1985)

Record low59° (2005)

Tue, 2583° / 64°

83 °

Rossmoor, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high83°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high98° (1985)

Record low59° (1987)

Wed, 2683° / 64°

83 °

Rossmoor, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high98° (1981)

Record low58° (1975)

Thu, 2784° / 65°

84 °

Rossmoor, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high96° (1981)

Record low57° (1973)

Fri, 2884° / 65°

84 °

Rossmoor, Friday, 28 August

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high95° (1981)

Record low58° (2010)

Sat, 2985° / 64°

85 °

Rossmoor, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high85°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high98° (1967)

Record low58° (2002)

Sun, 3083° / 65°

83 °

Rossmoor, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high99° (1967)

Record low58° (1964)

Mon, 3183° / 64°

83 °

Rossmoor, Monday, 31 August

Climate normal for this date — 60-year average.

Average high83°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high102° (2017)

Record low58° (1973)

Tue, 0183° / 65°

83 °

Rossmoor, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0 in

Chance of precipitation2%

Record high99° (1998)

Record low57° (1973)

Wed, 0283° / 65°

0.02

83 °

Rossmoor, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0.02 in

Chance of precipitation2%

Record high97° (1982)

Record low59° (2010)

Thu, 0384° / 65°

84 °

Rossmoor, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0 in

Chance of precipitation7%

Record high100° (1988)

Record low58° (1961)

Fri, 0485° / 65°

85 °

Rossmoor, Friday, 4 September

Climate normal for this date — 60-year average.

Average high85°

Average low65°

Average precipitation0 in

Chance of precipitation2%

Record high108° (2022)

Record low58° (1970)

Sat, 0584° / 65°

0.01

84 °

Rossmoor, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0.01 in

Chance of precipitation3%

Record high102° (2024)

Record low58° (1999)

Sun, 0684° / 65°

0.01

84 °

Rossmoor, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0.01 in

Chance of precipitation2%

Record high101° (2024)

Record low57° (1973)

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 Rossmoor, 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 Rossmoor, 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.