Monthly outlook for Rossmoor, CA: average high 78.2°, average low 66.7°. That is 2.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.9 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 28 October (85.4°), the coolest 23 October (56.1°).
78.2°/66.7°
Average high / low
+2.2°
Above normal
2 / 1
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
78.1°
74.8°
+1.8°
31 October – 9 November
78.3°
72.5°
+3.2°
10 November – 19 November
at normal
70.2°
—
October records over 66 years
101.7°24 October 2017All-time high
37.9°30 October 1971All-time low
Thu, 2270° / 57°0.3
70 °
Rossmoor, Thursday, 22 October
Rain. High 70°, low 57°.
Pressure29.94 inHg
Wind4 mph SW
Humidity75%
Visibility4.8 mi
Dew point59°
Fri, 2371° / 56°0
71 °
Rossmoor, Friday, 23 October
Clear. High 71°, low 56°.
Pressure30.00 inHg
Wind2 mph S
Humidity63%
Visibility6.2 mi
Dew point55°
Sat, 2474° / 56°0
74 °
Rossmoor, Saturday, 24 October
Clear. High 74°, low 56°.
Pressure29.94 inHg
Wind1.4 mph SW
Humidity63%
Visibility6.2 mi
Dew point57°
Sun, 2579° / 58°0
79 °
Rossmoor, Sunday, 25 October
Clear. High 79°, low 58°.
Pressure30.03 inHg
Wind4 mph W
Humidity55%
Visibility—
Dew point54°
Mon, 2683° / 60°0
83 °
Rossmoor, Monday, 26 October
Overcast. High 83°, low 60°.
Pressure30.03 inHg
Wind11.7 mph W
Humidity42%
Visibility—
Dew point50°
Tue, 2785° / 74°0
85 °
Rossmoor, Tuesday, 27 October
Partly cloudy. High 85°, low 74°.
Pressure29.97 inHg
Wind8.5 mph W
Humidity20%
Visibility—
Dew point35°
Wed, 2885° / 76°0
85 °
Rossmoor, Wednesday, 28 October
Overcast. High 85°, low 76°.
Pressure29.88 inHg
Wind6.5 mph W
Humidity21%
Visibility—
Dew point37°
Thu, 2981° / 74°0
81 °
Rossmoor, Thursday, 29 October
Overcast. High 81°, low 74°.
Pressure29.88 inHg
Wind7.6 mph SW
Humidity25%
Visibility—
Dew point40°
Fri, 3074° / 70°0
74 °
Rossmoor, Friday, 30 October
Overcast. High 74°, low 70°.
Pressure29.88 inHg
Wind10.1 mph SW
Humidity61%
Visibility—
Dew point58°
Sat, 3172° / 67°0
72 °
Rossmoor, Saturday, 31 October
Mostly clear. High 72°, low 67°.
Pressure29.80 inHg
Wind9 mph SE
Humidity61%
Visibility—
Dew point56°
Sun, 0178° / 68°0
78 °
Rossmoor, Sunday, 1 November
Clear. High 78°, low 68°.
Pressure29.91 inHg
Wind8.9 mph W
Humidity55%
Visibility—
Dew point55°
Mon, 0284° / 72°0
84 °
Rossmoor, Monday, 2 November
Clear. High 84°, low 72°.
Pressure30.06 inHg
Wind9.2 mph W
Humidity24%
Visibility—
Dew point39°
Tue, 0383° / 74°0
83 °
Rossmoor, Tuesday, 3 November
Partly cloudy. High 83°, low 74°.
Pressure30.06 inHg
Wind8.6 mph S
Humidity19%
Visibility—
Dew point36°
Wed, 0476° / 72°0
76 °
Rossmoor, Wednesday, 4 November
Overcast. High 76°, low 72°.
Pressure30.09 inHg
Wind9.5 mph SW
Humidity64%
Visibility—
Dew point61°
Thu, 0577° / 71°0
77 °
Rossmoor, Thursday, 5 November
Clear. High 77°, low 71°.
Pressure30.09 inHg
Wind2.7 mph W
Humidity53%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0671° / 55°0.02
71 °
Rossmoor, Friday, 6 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.02 in
Chance of precipitation8%
Record high89° (2006)
Record low46° (2011)
Sat, 0771° / 55°0.05
71 °
Rossmoor, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.05 in
Chance of precipitation8%
Record high86° (2006)
Record low42° (2011)
Sun, 0871° / 54°0.06
71 °
Rossmoor, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.06 in
Chance of precipitation17%
Record high86° (2016)
Record low43° (2011)
Mon, 0971° / 53°0.03
71 °
Rossmoor, Monday, 9 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.03 in
Chance of precipitation12%
Record high90° (2016)
Record low42° (2020)
Tue, 1071° / 53°0.03
71 °
Rossmoor, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.03 in
Chance of precipitation8%
Record high88° (1990)
Record low44° (2020)
Wed, 1171° / 53°0.04
71 °
Rossmoor, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.04 in
Chance of precipitation10%
Record high87° (2021)
Record low42° (2012)
Thu, 1271° / 52°0.04
71 °
Rossmoor, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high71°
Average low52°
Average precipitation0.04 in
Chance of precipitation15%
Record high92° (2021)
Record low41° (1978)
Fri, 1371° / 52°0.03
71 °
Rossmoor, Friday, 13 November
Climate normal for this date — 60-year average.
Average high71°
Average low52°
Average precipitation0.03 in
Chance of precipitation12%
Record high86° (2013)
Record low40° (2000)
Sat, 1471° / 52°0.04
71 °
Rossmoor, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high71°
Average low52°
Average precipitation0.04 in
Chance of precipitation8%
Record high87° (2008)
Record low39° (1985)
Sun, 1570° / 51°0.07
70 °
Rossmoor, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high70°
Average low51°
Average precipitation0.07 in
Chance of precipitation7%
Record high87° (2008)
Record low40° (1964)
Mon, 1669° / 52°0.04
69 °
Rossmoor, Monday, 16 November
Climate normal for this date — 60-year average.
Average high69°
Average low52°
Average precipitation0.04 in
Chance of precipitation7%
Record high85° (2008)
Record low37° (1964)
Tue, 1769° / 52°0.04
69 °
Rossmoor, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high69°
Average low52°
Average precipitation0.04 in
Chance of precipitation12%
Record high91° (2019)
Record low40° (1971)
Wed, 1869° / 51°0.04
69 °
Rossmoor, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high69°
Average low51°
Average precipitation0.04 in
Chance of precipitation10%
Record high84° (2019)
Record low38° (1964)
Thu, 1970° / 50°0.06
70 °
Rossmoor, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.06 in
Chance of precipitation5%
Record high85° (1989)
Record low35° (1964)
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.