Monthly outlook for Lake Forest, CA: average high 78.3°, average low 62.4°. That is 2.4° 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 16 October (93.4°), the coolest 21 October (52.8°).
78.3°/62.4°
Average high / low
+2.4°
Above normal
2 / 1
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
79.7°
74.6°
+2.9°
25 October – 3 November
75.8°
72.8°
+1.7°
4 November – 13 November
at normal
70.2°
—
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).
Fri, 1693° / 68°0
93 °
Lake Forest, Friday, 16 October
Clear. High 93°, low 68°.
Pressure29.97 inHg
Wind18 mph NE
Humidity20%
Visibility6.2 mi
Dew point42°
Sat, 1792° / 71°0
92 °
Lake Forest, Saturday, 17 October
Mostly clear. High 92°, low 71°.
Pressure30.00 inHg
Wind5.8 mph E
Humidity13%
Visibility6.2 mi
Dew point31°
Sun, 1886° / 68°0
86 °
Lake Forest, Sunday, 18 October
Clear. High 86°, low 68°.
Pressure29.97 inHg
Wind5.8 mph W
Humidity18%
Visibility6.2 mi
Dew point38°
Mon, 1982° / 64°0
82 °
Lake Forest, Monday, 19 October
Clear. High 82°, low 64°.
Pressure29.91 inHg
Wind5.1 mph SW
Humidity33%
Visibility6.2 mi
Dew point49°
Tue, 2070° / 56°0.42
70 °
Lake Forest, Tuesday, 20 October
Rain. High 70°, low 56°.
Pressure29.85 inHg
Wind10 mph S
Humidity64%
Visibility—
Dew point55°
Wed, 2166° / 53°0.47
66 °
Lake Forest, Wednesday, 21 October
Rain. High 66°, low 53°.
Pressure29.91 inHg
Wind7.5 mph SW
Humidity61%
Visibility—
Dew point49°
Thu, 2267° / 58°0.01
67 °
Lake Forest, Thursday, 22 October
Light rain. High 67°, low 58°.
Pressure30.03 inHg
Wind10.6 mph SW
Humidity57%
Visibility—
Dew point48°
Fri, 2372° / 59°0
72 °
Lake Forest, Friday, 23 October
Partly cloudy. High 72°, low 59°.
Pressure30.09 inHg
Wind5.7 mph W
Humidity55%
Visibility—
Dew point50°
Sat, 2481° / 63°0
81 °
Lake Forest, Saturday, 24 October
Clear. High 81°, low 63°.
Pressure30.06 inHg
Wind10.2 mph NE
Humidity26%
Visibility—
Dew point38°
Sun, 2578° / 65°0
78 °
Lake Forest, Sunday, 25 October
Clear. High 78°, low 65°.
Pressure30.12 inHg
Wind8.6 mph NE
Humidity14%
Visibility—
Dew point21°
Mon, 2679° / 65°0
79 °
Lake Forest, Monday, 26 October
Clear. High 79°, low 65°.
Pressure29.91 inHg
Wind5.5 mph W
Humidity12%
Visibility—
Dew point19°
Tue, 2777° / 63°0
77 °
Lake Forest, Tuesday, 27 October
Clear. High 77°, low 63°.
Pressure29.85 inHg
Wind6 mph SW
Humidity19%
Visibility—
Dew point28°
Wed, 2875° / 63°0
75 °
Lake Forest, Wednesday, 28 October
Partly cloudy. High 75°, low 63°.
Pressure30.00 inHg
Wind5.7 mph SW
Humidity42%
Visibility—
Dew point47°
Thu, 2973° / 63°0
73 °
Lake Forest, Thursday, 29 October
Overcast. High 73°, low 63°.
Pressure30.03 inHg
Wind8.2 mph SW
Humidity50%
Visibility—
Dew point51°
Fri, 3072° / 60°0
72 °
Lake Forest, Friday, 30 October
Clear. High 72°, low 60°.
Pressure30.12 inHg
Wind8.2 mph SW
Humidity51%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Wed, 1170° / 53°0.05
70 °
Lake Forest, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.05 in
Chance of precipitation13%
Record high89° (2021)
Record low44° (1982)
Thu, 1270° / 53°0.05
70 °
Lake Forest, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.05 in
Chance of precipitation17%
Record high94° (2021)
Record low42° (2000)
Fri, 1370° / 53°0.03
70 °
Lake Forest, Friday, 13 November
Climate normal for this date — 60-year average.
Average high70°
Average low53°
Average precipitation0.03 in
Chance of precipitation12%
Record high86° (2021)
Record low42° (2000)
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.