Monthly outlook for Irvine, CA: average high 75.5°, average low 64.6°. That is 0.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 16 October (94.8°), the coolest 21 October (58.9°).
75.5°/64.6°
Average high / low
+0.2°
Above normal
2 / 1
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
79°
75.9°
+1.7°
26 October – 4 November
69.7°
73.9°
-2.3°
5 November – 14 November
at normal
71.2°
—
October records over 66 years
104.2°24 October 2017All-time high
39.9°30 October 1971All-time low
Sat, 1791° / 73°0
91 °
Irvine, Saturday, 17 October
Overcast. High 91°, low 73°.
Pressure30.00 inHg
Wind7.9 mph E
Humidity13%
Visibility6.2 mi
Dew point31°
Sun, 1887° / 66°0
87 °
Irvine, Sunday, 18 October
Clear. High 87°, low 66°.
Pressure29.97 inHg
Wind4.4 mph W
Humidity17%
Visibility6.2 mi
Dew point37°
Mon, 1983° / 66°0
83 °
Irvine, Monday, 19 October
Clear. High 83°, low 66°.
Pressure29.91 inHg
Wind4.9 mph SW
Humidity37%
Visibility6.2 mi
Dew point54°
Tue, 2075° / 62°0
75 °
Irvine, Tuesday, 20 October
Mostly clear. High 75°, low 62°.
Pressure29.88 inHg
Wind5.3 mph SW
Humidity55%
Visibility6.2 mi
Dew point55°
Wed, 2171° / 59°0.06
71 °
Irvine, Wednesday, 21 October
Light rain. High 71°, low 59°.
Pressure29.88 inHg
Wind6 mph S
Humidity60%
Visibility—
Dew point54°
Thu, 2268° / 60°0
68 °
Irvine, Thursday, 22 October
Light rain. High 68°, low 60°.
Pressure29.97 inHg
Wind9.7 mph SW
Humidity64%
Visibility—
Dew point53°
Fri, 2369° / 62°0
69 °
Irvine, Friday, 23 October
Light rain. High 69°, low 62°.
Pressure30.00 inHg
Wind9.4 mph SW
Humidity50%
Visibility—
Dew point47°
Sat, 2474° / 62°0
74 °
Irvine, Saturday, 24 October
Clear. High 74°, low 62°.
Pressure30.03 inHg
Wind9.5 mph W
Humidity43%
Visibility—
Dew point45°
Sun, 2578° / 68°0
78 °
Irvine, Sunday, 25 October
Overcast. High 78°, low 68°.
Pressure30.00 inHg
Wind7.2 mph W
Humidity28%
Visibility—
Dew point39°
Mon, 2673° / 63°0
73 °
Irvine, Monday, 26 October
Overcast. High 73°, low 63°.
Pressure29.83 inHg
Wind11.3 mph W
Humidity51%
Visibility—
Dew point51°
Tue, 2768° / 62°0
68 °
Irvine, Tuesday, 27 October
Mostly clear. High 68°, low 62°.
Pressure29.85 inHg
Wind11.9 mph SW
Humidity55%
Visibility—
Dew point49°
Wed, 2870° / 62°0
70 °
Irvine, Wednesday, 28 October
Overcast. High 70°, low 62°.
Pressure30.03 inHg
Wind8.6 mph W
Humidity54%
Visibility—
Dew point50°
Thu, 2972° / 66°0
72 °
Irvine, Thursday, 29 October
Overcast. High 72°, low 66°.
Pressure30.03 inHg
Wind7.7 mph W
Humidity59%
Visibility—
Dew point53°
Fri, 3068° / 64°0
68 °
Irvine, Friday, 30 October
Overcast. High 68°, low 64°.
Pressure30.06 inHg
Wind7.7 mph W
Humidity57%
Visibility—
Dew point52°
Sat, 3167° / 62°0.09
67 °
Irvine, Saturday, 31 October
Light rain. High 67°, low 62°.
Pressure30.03 inHg
Wind6.4 mph W
Humidity58%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 1071° / 54°0.04
71 °
Irvine, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.04 in
Chance of precipitation8%
Record high88° (1990)
Record low42° (2020)
Wed, 1171° / 53°0.06
71 °
Irvine, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.06 in
Chance of precipitation13%
Record high91° (2021)
Record low44° (2012)
Thu, 1271° / 53°0.04
71 °
Irvine, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.04 in
Chance of precipitation15%
Record high96° (2021)
Record low42° (2000)
Fri, 1371° / 53°0.03
71 °
Irvine, Friday, 13 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.03 in
Chance of precipitation13%
Record high87° (2013)
Record low42° (2000)
Sat, 1471° / 53°0.04
71 °
Irvine, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.04 in
Chance of precipitation10%
Record high86° (2008)
Record low41° (1985)
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.