Monthly outlook for Porphyry, CA: average high 78.4°, average low 61.6°. That is 1.3° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 7 November (90°), the coolest 25 October (54.3°).
78.4°/61.6°
Average high / low
+1.3°
Above normal
1 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
76.6°
76.8°
-0.1°
2 November – 11 November
81.4°
73.8°
+4.2°
12 November – 21 November
at normal
70.7°
—
October records over 66 years
105.4°1 October 2020All-time high
33.3°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Corona (2 mi).
Sat, 2479° / 57°0
79 °
Porphyry, Saturday, 24 October
Clear. High 79°, low 57°.
Pressure29.94 inHg
Wind1.1 mph NE
Humidity47%
Visibility6.2 mi
Dew point50°
Sun, 2579° / 54°0
79 °
Porphyry, Sunday, 25 October
Clear. High 79°, low 54°.
Pressure30.03 inHg
Wind2.9 mph N
Humidity42%
Visibility6.2 mi
Dew point51°
Mon, 2679° / 57°0
79 °
Porphyry, Monday, 26 October
Partly cloudy. High 79°, low 57°.
Pressure30.03 inHg
Wind1.5 mph NW
Humidity41%
Visibility6.2 mi
Dew point49°
Tue, 2777° / 56°0
77 °
Porphyry, Tuesday, 27 October
Clear. High 77°, low 56°.
Pressure30.00 inHg
Wind2.6 mph NW
Humidity45%
Visibility—
Dew point47°
Wed, 2881° / 57°0.01
81 °
Porphyry, Wednesday, 28 October
Light rain. High 81°, low 57°.
Pressure29.97 inHg
Wind4.2 mph SW
Humidity43%
Visibility—
Dew point47°
Thu, 2971° / 59°0.04
71 °
Porphyry, Thursday, 29 October
Light rain. High 71°, low 59°.
Pressure29.85 inHg
Wind9.8 mph SW
Humidity49%
Visibility—
Dew point46°
Fri, 3072° / 59°0
72 °
Porphyry, Friday, 30 October
Clear. High 72°, low 59°.
Pressure30.00 inHg
Wind5.5 mph SE
Humidity39%
Visibility—
Dew point40°
Sat, 3177° / 61°0
77 °
Porphyry, Saturday, 31 October
Overcast. High 77°, low 61°.
Pressure30.03 inHg
Wind5.2 mph SW
Humidity23%
Visibility—
Dew point30°
Sun, 0180° / 66°0
80 °
Porphyry, Sunday, 1 November
Partly cloudy. High 80°, low 66°.
Pressure30.00 inHg
Wind8.4 mph SE
Humidity18%
Visibility—
Dew point28°
Mon, 0274° / 66°0
74 °
Porphyry, Monday, 2 November
Light rain. High 74°, low 66°.
Pressure30.03 inHg
Wind6.5 mph E
Humidity36%
Visibility—
Dew point42°
Tue, 0379° / 67°0
79 °
Porphyry, Tuesday, 3 November
Overcast. High 79°, low 67°.
Pressure30.06 inHg
Wind5.5 mph W
Humidity34%
Visibility—
Dew point44°
Wed, 0482° / 67°0
82 °
Porphyry, Wednesday, 4 November
Clear. High 82°, low 67°.
Pressure30.09 inHg
Wind7.9 mph W
Humidity30%
Visibility—
Dew point42°
Thu, 0579° / 66°0
79 °
Porphyry, Thursday, 5 November
Clear. High 79°, low 66°.
Pressure30.09 inHg
Wind8 mph W
Humidity48%
Visibility—
Dew point53°
Fri, 0684° / 66°0
84 °
Porphyry, Friday, 6 November
Overcast. High 84°, low 66°.
Pressure30.03 inHg
Wind4.1 mph NW
Humidity33%
Visibility—
Dew point45°
Sat, 0790° / 70°0
90 °
Porphyry, Saturday, 7 November
Overcast. High 90°, low 70°.
Pressure30.03 inHg
Wind5.3 mph E
Humidity18%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0873° / 51°0.09
73 °
Porphyry, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.09 in
Chance of precipitation22%
Record high91° (2016)
Record low38° (2011)
Mon, 0972° / 51°0.05
72 °
Porphyry, Monday, 9 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.05 in
Chance of precipitation13%
Record high92° (2025)
Record low39° (2011)
Tue, 1072° / 50°0.04
72 °
Porphyry, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.04 in
Chance of precipitation10%
Record high93° (2025)
Record low41° (2020)
Wed, 1172° / 49°0.07
72 °
Porphyry, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.07 in
Chance of precipitation15%
Record high89° (2021)
Record low38° (2012)
Thu, 1272° / 49°0.06
72 °
Porphyry, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.06 in
Chance of precipitation15%
Record high92° (2021)
Record low35° (2000)
Fri, 1373° / 49°0.04
73 °
Porphyry, Friday, 13 November
Climate normal for this date — 60-year average.
Average high73°
Average low49°
Average precipitation0.04 in
Chance of precipitation15%
Record high92° (2021)
Record low34° (1985)
Sat, 1472° / 49°0.05
72 °
Porphyry, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.05 in
Chance of precipitation12%
Record high94° (2021)
Record low35° (1985)
Sun, 1571° / 48°0.06
71 °
Porphyry, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.06 in
Chance of precipitation15%
Record high86° (2021)
Record low34° (1964)
Mon, 1671° / 48°0.05
71 °
Porphyry, Monday, 16 November
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.05 in
Chance of precipitation13%
Record high90° (2020)
Record low35° (1964)
Tue, 1770° / 49°0.04
70 °
Porphyry, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.04 in
Chance of precipitation15%
Record high90° (2019)
Record low36° (1971)
Wed, 1870° / 48°0.06
70 °
Porphyry, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.06 in
Chance of precipitation18%
Record high89° (2019)
Record low31° (1964)
Thu, 1971° / 47°0.06
71 °
Porphyry, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high71°
Average low47°
Average precipitation0.06 in
Chance of precipitation7%
Record high87° (2006)
Record low29° (1964)
Fri, 2070° / 47°0.07
70 °
Porphyry, Friday, 20 November
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.07 in
Chance of precipitation15%
Record high85° (2006)
Record low31° (1964)
Sat, 2168° / 47°0.11
68 °
Porphyry, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high68°
Average low47°
Average precipitation0.11 in
Chance of precipitation22%
Record high91° (2017)
Record low33° (1979)
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 Porphyry, 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 Porphyry, 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.