Monthly outlook for Lake Forest, CA: average high 79.8°, average low 63.6°. That is 3° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 27 October (89.4°), the coolest 13 October (52.4°).
79.8°/63.6°
Average high / low
+3°
Above normal
1 / 1
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
76.7°
74.7°
+1.1°
22 October – 31 October
84.8°
73.2°
+6.4°
1 November – 10 November
at normal
71°
—
October records over 66 years
104.7°24 October 2017All-time high
41.2°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Mission Viejo (4 mi).
Tue, 1372° / 52°0
72 °
Lake Forest, Tuesday, 13 October
Clear. High 72°, low 52°.
Pressure30.03 inHg
Wind3.8 mph NW
Humidity59%
Visibility6.2 mi
Dew point50°
Wed, 1477° / 56°0
77 °
Lake Forest, Wednesday, 14 October
Clear. High 77°, low 56°.
Pressure30.06 inHg
Wind4 mph N
Humidity27%
Visibility6.2 mi
Dew point39°
Thu, 1582° / 60°0
82 °
Lake Forest, Thursday, 15 October
Clear. High 82°, low 60°.
Pressure29.97 inHg
Wind11.9 mph NE
Humidity25%
Visibility6.2 mi
Dew point42°
Fri, 1688° / 71°0
88 °
Lake Forest, Friday, 16 October
Clear. High 88°, low 71°.
Pressure29.91 inHg
Wind15.9 mph NE
Humidity24%
Visibility6.2 mi
Dew point44°
Sat, 1786° / 70°0
86 °
Lake Forest, Saturday, 17 October
Clear. High 86°, low 70°.
Pressure29.97 inHg
Wind9.2 mph E
Humidity26%
Visibility—
Dew point43°
Sun, 1883° / 67°0
83 °
Lake Forest, Sunday, 18 October
Clear. High 83°, low 67°.
Pressure29.97 inHg
Wind7.6 mph SW
Humidity33%
Visibility—
Dew point46°
Mon, 1980° / 64°0
80 °
Lake Forest, Monday, 19 October
Clear. High 80°, low 64°.
Pressure29.94 inHg
Wind8.2 mph SW
Humidity32%
Visibility—
Dew point46°
Tue, 2067° / 60°0
67 °
Lake Forest, Tuesday, 20 October
Overcast. High 67°, low 60°.
Pressure29.83 inHg
Wind19.9 mph W
Humidity64%
Visibility—
Dew point53°
Wed, 2168° / 55°0
68 °
Lake Forest, Wednesday, 21 October
Clear. High 68°, low 55°.
Pressure29.91 inHg
Wind9.9 mph W
Humidity37%
Visibility—
Dew point36°
Thu, 2276° / 59°0
76 °
Lake Forest, Thursday, 22 October
Clear. High 76°, low 59°.
Pressure30.09 inHg
Wind7.5 mph W
Humidity18%
Visibility—
Dew point25°
Fri, 2382° / 63°0
82 °
Lake Forest, Friday, 23 October
Clear. High 82°, low 63°.
Pressure30.00 inHg
Wind8.4 mph NE
Humidity14%
Visibility—
Dew point22°
Sat, 2486° / 71°0
86 °
Lake Forest, Saturday, 24 October
Clear. High 86°, low 71°.
Pressure30.09 inHg
Wind20.8 mph NE
Humidity13%
Visibility—
Dew point25°
Sun, 2586° / 68°0
86 °
Lake Forest, Sunday, 25 October
Clear. High 86°, low 68°.
Pressure30.03 inHg
Wind10 mph NE
Humidity11%
Visibility—
Dew point20°
Mon, 2689° / 71°0
89 °
Lake Forest, Monday, 26 October
Clear. High 89°, low 71°.
Pressure30.03 inHg
Wind9.2 mph NE
Humidity11%
Visibility—
Dew point24°
Tue, 2789° / 73°0
89 °
Lake Forest, Tuesday, 27 October
Clear. High 89°, low 73°.
Pressure30.03 inHg
Wind7.3 mph NE
Humidity12%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2873° / 56°0.02
73 °
Lake Forest, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.02 in
Chance of precipitation7%
Record high88° (2008)
Record low49° (1970)
Thu, 2972° / 55°0.01
72 °
Lake Forest, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.01 in
Chance of precipitation8%
Record high93° (2025)
Record low46° (1971)
Fri, 3072° / 56°0.04
72 °
Lake Forest, Friday, 30 October
Climate normal for this date — 60-year average.
Average high72°
Average low56°
Average precipitation0.04 in
Chance of precipitation13%
Record high90° (1962)
Record low41° (1971)
Sat, 3172° / 55°0.02
72 °
Lake Forest, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.02 in
Chance of precipitation7%
Record high86° (1962)
Record low44° (1971)
Sun, 0173° / 55°0.03
73 °
Lake Forest, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.03 in
Chance of precipitation12%
Record high93° (1966)
Record low46° (1971)
Mon, 0273° / 55°0.02
73 °
Lake Forest, Monday, 2 November
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.02 in
Chance of precipitation8%
Record high91° (1997)
Record low47° (1974)
Tue, 0373° / 54°0
73 °
Lake Forest, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high73°
Average low54°
Average precipitation0 in
Chance of precipitation2%
Record high88° (2010)
Record low48° (1990)
Wed, 0472° / 54°0.02
72 °
Lake Forest, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.02 in
Chance of precipitation7%
Record high91° (1976)
Record low45° (1994)
Thu, 0571° / 55°0.01
71 °
Lake Forest, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.01 in
Chance of precipitation5%
Record high90° (2020)
Record low47° (1973)
Fri, 0670° / 54°0.01
70 °
Lake Forest, Friday, 6 November
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.01 in
Chance of precipitation5%
Record high88° (2006)
Record low48° (1996)
Sat, 0769° / 54°0.06
69 °
Lake Forest, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high69°
Average low54°
Average precipitation0.06 in
Chance of precipitation10%
Record high87° (2006)
Record low44° (2011)
Sun, 0870° / 54°0.08
70 °
Lake Forest, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.08 in
Chance of precipitation20%
Record high86° (2019)
Record low46° (2011)
Mon, 0970° / 54°0.04
70 °
Lake Forest, Monday, 9 November
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.04 in
Chance of precipitation8%
Record high90° (2016)
Record low43° (2020)
Tue, 1069° / 53°0.04
69 °
Lake Forest, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.04 in
Chance of precipitation10%
Record high87° (1990)
Record low41° (2020)
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 Lake Forest, 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 Lake Forest, 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.