Monthly outlook for Chapman, CA: average high 74.3°, average low 60.7°. That is 1.4° below the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 27 October (84.4°), the coolest 23 October (46.6°).
74.3°/60.7°
Average high / low
−1.4°
Below normal
2 / 1
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
72.8°
77.2°
-2.5°
31 October – 9 November
76.8°
74.6°
+1.2°
10 November – 19 November
at normal
71.3°
—
October records over 66 years
104.9°4 October 1987All-time high
35.4°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — San Pasqual (1 mi).
Thu, 2266° / 55°0.3
66 °
Chapman, Thursday, 22 October
Rain. High 66°, low 55°.
Pressure29.97 inHg
Wind3.8 mph S
Humidity64%
Visibility6.2 mi
Dew point47°
Fri, 2362° / 47°0
62 °
Chapman, Friday, 23 October
Light rain. High 62°, low 47°.
Pressure29.97 inHg
Wind6 mph SW
Humidity67%
Visibility6.2 mi
Dew point50°
Sat, 2468° / 48°0
68 °
Chapman, Saturday, 24 October
Clear. High 68°, low 48°.
Pressure29.97 inHg
Wind3.2 mph SW
Humidity60%
Visibility6.2 mi
Dew point53°
Sun, 2571° / 54°0
71 °
Chapman, Sunday, 25 October
Clear. High 71°, low 54°.
Pressure30.06 inHg
Wind4 mph SW
Humidity46%
Visibility—
Dew point45°
Mon, 2673° / 58°0
73 °
Chapman, Monday, 26 October
Mostly clear. High 73°, low 58°.
Pressure30.06 inHg
Wind4.5 mph SW
Humidity39%
Visibility—
Dew point43°
Tue, 2784° / 65°0
84 °
Chapman, Tuesday, 27 October
Overcast. High 84°, low 65°.
Pressure30.00 inHg
Wind7.4 mph SW
Humidity18%
Visibility—
Dew point31°
Wed, 2880° / 68°0
80 °
Chapman, Wednesday, 28 October
Overcast. High 80°, low 68°.
Pressure29.91 inHg
Wind7.7 mph S
Humidity33%
Visibility—
Dew point45°
Thu, 2976° / 67°0
76 °
Chapman, Thursday, 29 October
Overcast. High 76°, low 67°.
Pressure29.91 inHg
Wind6.4 mph SW
Humidity42%
Visibility—
Dew point48°
Fri, 3074° / 63°0
74 °
Chapman, Friday, 30 October
Clear. High 74°, low 63°.
Pressure29.88 inHg
Wind7.8 mph S
Humidity55%
Visibility—
Dew point52°
Sat, 3172° / 62°0
72 °
Chapman, Saturday, 31 October
Overcast. High 72°, low 62°.
Pressure29.91 inHg
Wind7.8 mph SW
Humidity66%
Visibility—
Dew point53°
Sun, 0178° / 61°0
78 °
Chapman, Sunday, 1 November
Overcast. High 78°, low 61°.
Pressure30.00 inHg
Wind6.1 mph SW
Humidity35%
Visibility—
Dew point42°
Mon, 0278° / 67°0
78 °
Chapman, Monday, 2 November
Overcast. High 78°, low 67°.
Pressure30.09 inHg
Wind7.1 mph SW
Humidity42%
Visibility—
Dew point49°
Tue, 0378° / 66°0
78 °
Chapman, Tuesday, 3 November
Overcast. High 78°, low 66°.
Pressure29.97 inHg
Wind6.5 mph SW
Humidity31%
Visibility—
Dew point41°
Wed, 0480° / 65°0
80 °
Chapman, Wednesday, 4 November
Clear. High 80°, low 65°.
Pressure29.88 inHg
Wind7 mph SW
Humidity26%
Visibility—
Dew point38°
Thu, 0575° / 64°0
75 °
Chapman, Thursday, 5 November
Clear. High 75°, low 64°.
Pressure29.88 inHg
Wind7.5 mph SW
Humidity47%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0673° / 51°0.02
73 °
Chapman, Friday, 6 November
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.02 in
Chance of precipitation7%
Record high93° (2006)
Record low41° (2011)
Sat, 0772° / 51°0.07
72 °
Chapman, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high72°
Average low51°
Average precipitation0.07 in
Chance of precipitation13%
Record high92° (2006)
Record low39° (2011)
Sun, 0873° / 51°0.07
73 °
Chapman, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.07 in
Chance of precipitation22%
Record high91° (2016)
Record low40° (2011)
Mon, 0972° / 50°0.04
72 °
Chapman, Monday, 9 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.04 in
Chance of precipitation10%
Record high92° (2016)
Record low36° (2020)
Tue, 1072° / 50°0.03
72 °
Chapman, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high91° (1990)
Record low38° (2022)
Wed, 1172° / 50°0.06
72 °
Chapman, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.06 in
Chance of precipitation12%
Record high89° (2021)
Record low37° (2000)
Thu, 1273° / 50°0.02
73 °
Chapman, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.02 in
Chance of precipitation12%
Record high92° (2021)
Record low33° (1978)
Fri, 1373° / 49°0.03
73 °
Chapman, Friday, 13 November
Climate normal for this date — 60-year average.
Average high73°
Average low49°
Average precipitation0.03 in
Chance of precipitation7%
Record high91° (2013)
Record low36° (1985)
Sat, 1472° / 50°0.05
72 °
Chapman, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high72°
Average low50°
Average precipitation0.05 in
Chance of precipitation7%
Record high89° (2008)
Record low35° (1964)
Sun, 1571° / 49°0.07
71 °
Chapman, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.07 in
Chance of precipitation8%
Record high89° (2008)
Record low35° (1964)
Mon, 1670° / 49°0.05
70 °
Chapman, Monday, 16 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.05 in
Chance of precipitation8%
Record high90° (2008)
Record low34° (1964)
Tue, 1770° / 49°0.04
70 °
Chapman, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.04 in
Chance of precipitation13%
Record high89° (2008)
Record low38° (1994)
Wed, 1870° / 48°0.06
70 °
Chapman, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.06 in
Chance of precipitation18%
Record high88° (2019)
Record low33° (1964)
Thu, 1971° / 48°0.04
71 °
Chapman, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high71°
Average low48°
Average precipitation0.04 in
Chance of precipitation7%
Record high88° (2006)
Record low31° (1964)
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 Chapman, 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 Chapman, 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.