Monthly outlook for Irvine, CA: average high 80°, average low 67°. That is 2.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 16 October (89.3°), the coolest 13 October (53.6°).
80°/67°
Average high / low
+2.2°
Above normal
2 / 1
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
78.6°
76.3°
+1.3°
21 October – 30 October
82.2°
74.8°
+4.1°
31 October – 9 November
at normal
72.5°
—
October records over 66 years
104.2°24 October 2017All-time high
39.9°30 October 1971All-time low
Mon, 1264° / 57°0.23
64 °
Irvine, Monday, 12 October
Light rain. High 64°, low 57°.
Pressure29.91 inHg
Wind4.8 mph SW
Humidity64%
Visibility5.3 mi
Dew point52°
Tue, 1369° / 54°0
69 °
Irvine, Tuesday, 13 October
Clear. High 69°, low 54°.
Pressure30.03 inHg
Wind2.4 mph NW
Humidity60%
Visibility6.2 mi
Dew point52°
Wed, 1476° / 54°0
76 °
Irvine, Wednesday, 14 October
Clear. High 76°, low 54°.
Pressure30.03 inHg
Wind2.6 mph NW
Humidity41%
Visibility6.2 mi
Dew point50°
Thu, 1584° / 58°0
84 °
Irvine, Thursday, 15 October
Clear. High 84°, low 58°.
Pressure29.94 inHg
Wind5.2 mph N
Humidity28%
Visibility6.2 mi
Dew point45°
Fri, 1689° / 72°0
89 °
Irvine, Friday, 16 October
Clear. High 89°, low 72°.
Pressure29.88 inHg
Wind15.1 mph NE
Humidity24%
Visibility—
Dew point42°
Sat, 1789° / 72°0
89 °
Irvine, Saturday, 17 October
Clear. High 89°, low 72°.
Pressure29.97 inHg
Wind10.1 mph E
Humidity27%
Visibility—
Dew point47°
Sun, 1886° / 76°0
86 °
Irvine, Sunday, 18 October
Clear. High 86°, low 76°.
Pressure29.97 inHg
Wind7.4 mph SW
Humidity30%
Visibility—
Dew point48°
Mon, 1983° / 73°0
83 °
Irvine, Monday, 19 October
Clear. High 83°, low 73°.
Pressure30.00 inHg
Wind6.8 mph SW
Humidity37%
Visibility—
Dew point51°
Tue, 2077° / 69°0
77 °
Irvine, Tuesday, 20 October
Clear. High 77°, low 69°.
Pressure29.88 inHg
Wind10.9 mph S
Humidity49%
Visibility—
Dew point54°
Wed, 2177° / 67°0
77 °
Irvine, Wednesday, 21 October
Clear. High 77°, low 67°.
Pressure29.88 inHg
Wind6.4 mph SW
Humidity55%
Visibility—
Dew point56°
Thu, 2279° / 67°0
79 °
Irvine, Thursday, 22 October
Clear. High 79°, low 67°.
Pressure29.85 inHg
Wind6.9 mph W
Humidity50%
Visibility—
Dew point54°
Fri, 2386° / 71°0
86 °
Irvine, Friday, 23 October
Clear. High 86°, low 71°.
Pressure29.91 inHg
Wind32.2 mph NE
Humidity17%
Visibility—
Dew point32°
Sat, 2483° / 73°0
83 °
Irvine, Saturday, 24 October
Clear. High 83°, low 73°.
Pressure30.06 inHg
Wind31.7 mph NE
Humidity15%
Visibility—
Dew point26°
Sun, 2584° / 74°0
84 °
Irvine, Sunday, 25 October
Clear. High 84°, low 74°.
Pressure30.03 inHg
Wind20.9 mph NE
Humidity11%
Visibility—
Dew point22°
Mon, 2685° / 72°0
85 °
Irvine, Monday, 26 October
Clear. High 85°, low 72°.
Pressure30.00 inHg
Wind5.8 mph NW
Humidity14%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2774° / 57°0.06
74 °
Irvine, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.06 in
Chance of precipitation7%
Record high90° (1973)
Record low51° (1989)
Wed, 2874° / 56°0.02
74 °
Irvine, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.02 in
Chance of precipitation10%
Record high89° (1965)
Record low49° (1970)
Thu, 2974° / 56°0.01
74 °
Irvine, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.01 in
Chance of precipitation8%
Record high91° (2025)
Record low43° (1971)
Fri, 3073° / 56°0.04
73 °
Irvine, Friday, 30 October
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.04 in
Chance of precipitation15%
Record high92° (1962)
Record low40° (1971)
Sat, 3173° / 55°0.02
73 °
Irvine, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.02 in
Chance of precipitation10%
Record high88° (1962)
Record low44° (1971)
Sun, 0174° / 55°0.04
74 °
Irvine, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0.04 in
Chance of precipitation12%
Record high94° (1966)
Record low46° (1971)
Mon, 0274° / 55°0.01
74 °
Irvine, Monday, 2 November
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0.01 in
Chance of precipitation7%
Record high92° (1997)
Record low46° (1971)
Tue, 0374° / 55°0
74 °
Irvine, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0 in
Chance of precipitation3%
Record high90° (2010)
Record low47° (1990)
Wed, 0473° / 55°0.03
73 °
Irvine, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.03 in
Chance of precipitation8%
Record high93° (1976)
Record low44° (1994)
Thu, 0572° / 55°0.02
72 °
Irvine, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.02 in
Chance of precipitation7%
Record high89° (2020)
Record low47° (2011)
Fri, 0671° / 55°0.01
71 °
Irvine, Friday, 6 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.01 in
Chance of precipitation5%
Record high89° (2006)
Record low49° (2011)
Sat, 0771° / 55°0.06
71 °
Irvine, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.06 in
Chance of precipitation10%
Record high88° (2006)
Record low44° (2011)
Sun, 0871° / 54°0.07
71 °
Irvine, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.07 in
Chance of precipitation20%
Record high86° (2016)
Record low45° (2011)
Mon, 0971° / 55°0.05
71 °
Irvine, Monday, 9 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.05 in
Chance of precipitation12%
Record high91° (2016)
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 Irvine, 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 Irvine, 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.