Monthly outlook for Harbor Side, CA: average high 75.2°, average low 66.6°. That is 2.1° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 17 October (89.1°), the coolest 20 October (60.9°).
75.2°/66.6°
Average high / low
+2.1°
Above normal
4 / 2
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
77.6°
71.9°
+3.2°
27 October – 5 November
71.2°
70.4°
+0.4°
6 November – 15 November
at normal
68.4°
—
October records over 66 years
97.2°14 October 1961All-time high
45.7°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Imperial Beach (4 mi).
Sun, 1887° / 69°0
87 °
Harbor Side, Sunday, 18 October
Clear. High 87°, low 69°.
Pressure29.97 inHg
Wind5.7 mph W
Humidity28%
Visibility6.2 mi
Dew point44°
Mon, 1977° / 64°0
77 °
Harbor Side, Monday, 19 October
Clear. High 77°, low 64°.
Pressure29.91 inHg
Wind5.2 mph W
Humidity58%
Visibility6.2 mi
Dew point62°
Tue, 2076° / 61°0
76 °
Harbor Side, Tuesday, 20 October
Clear. High 76°, low 61°.
Pressure29.88 inHg
Wind5.1 mph NW
Humidity59%
Visibility5.2 mi
Dew point60°
Wed, 2173° / 63°0.21
73 °
Harbor Side, Wednesday, 21 October
Rain. High 73°, low 63°.
Pressure29.88 inHg
Wind8.3 mph SE
Humidity68%
Visibility—
Dew point60°
Thu, 2270° / 65°0.28
70 °
Harbor Side, Thursday, 22 October
Light rain. High 70°, low 65°.
Pressure29.91 inHg
Wind8.6 mph S
Humidity80%
Visibility—
Dew point61°
Fri, 2370° / 67°0.02
70 °
Harbor Side, Friday, 23 October
Light rain. High 70°, low 67°.
Pressure30.03 inHg
Wind9.8 mph W
Humidity62%
Visibility—
Dew point56°
Sat, 2477° / 66°0
77 °
Harbor Side, Saturday, 24 October
Clear. High 77°, low 66°.
Pressure30.00 inHg
Wind6.8 mph N
Humidity56%
Visibility—
Dew point54°
Sun, 2579° / 70°0
79 °
Harbor Side, Sunday, 25 October
Overcast. High 79°, low 70°.
Pressure30.00 inHg
Wind8.2 mph N
Humidity18%
Visibility—
Dew point28°
Mon, 2678° / 72°0
78 °
Harbor Side, Monday, 26 October
Overcast. High 78°, low 72°.
Pressure29.77 inHg
Wind5.3 mph NW
Humidity20%
Visibility—
Dew point31°
Tue, 2773° / 69°0
73 °
Harbor Side, Tuesday, 27 October
Clear. High 73°, low 69°.
Pressure29.80 inHg
Wind9.2 mph SW
Humidity48%
Visibility—
Dew point52°
Wed, 2872° / 68°0
72 °
Harbor Side, Wednesday, 28 October
Clear. High 72°, low 68°.
Pressure30.06 inHg
Wind9.2 mph SW
Humidity62%
Visibility—
Dew point57°
Thu, 2969° / 66°0.12
69 °
Harbor Side, Thursday, 29 October
Light rain. High 69°, low 66°.
Pressure30.03 inHg
Wind19.1 mph W
Humidity74%
Visibility—
Dew point59°
Fri, 3067° / 63°0.06
67 °
Harbor Side, Friday, 30 October
Light rain. High 67°, low 63°.
Pressure29.91 inHg
Wind23.1 mph W
Humidity49%
Visibility—
Dew point46°
Sat, 3170° / 62°0
70 °
Harbor Side, Saturday, 31 October
Clear. High 70°, low 62°.
Pressure30.00 inHg
Wind8.9 mph N
Humidity35%
Visibility—
Dew point38°
Sun, 0176° / 66°0
76 °
Harbor Side, Sunday, 1 November
Clear. High 76°, low 66°.
Pressure30.12 inHg
Wind8.4 mph NW
Humidity18%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0271° / 56°0.01
71 °
Harbor Side, Monday, 2 November
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.01 in
Chance of precipitation10%
Record high87° (1966)
Record low47° (1971)
Tue, 0371° / 55°0.01
71 °
Harbor Side, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.01 in
Chance of precipitation5%
Record high84° (1976)
Record low49° (1990)
Wed, 0470° / 56°0.02
70 °
Harbor Side, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.02 in
Chance of precipitation7%
Record high91° (1976)
Record low46° (1994)
Thu, 0569° / 55°0.02
69 °
Harbor Side, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.02 in
Chance of precipitation7%
Record high85° (1976)
Record low48° (2024)
Fri, 0669° / 56°0.01
69 °
Harbor Side, Friday, 6 November
Climate normal for this date — 60-year average.
Average high69°
Average low56°
Average precipitation0.01 in
Chance of precipitation8%
Record high84° (2014)
Record low49° (1996)
Sat, 0768° / 56°0.03
68 °
Harbor Side, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high68°
Average low56°
Average precipitation0.03 in
Chance of precipitation10%
Record high83° (2014)
Record low48° (2024)
Sun, 0868° / 55°0.05
68 °
Harbor Side, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.05 in
Chance of precipitation18%
Record high82° (1976)
Record low45° (2024)
Mon, 0969° / 55°0.07
69 °
Harbor Side, Monday, 9 November
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.07 in
Chance of precipitation17%
Record high90° (2016)
Record low46° (2024)
Tue, 1068° / 55°0.04
68 °
Harbor Side, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high68°
Average low55°
Average precipitation0.04 in
Chance of precipitation17%
Record high84° (2016)
Record low45° (2020)
Wed, 1169° / 55°0.06
69 °
Harbor Side, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.06 in
Chance of precipitation15%
Record high83° (2021)
Record low46° (2022)
Thu, 1269° / 55°0.08
69 °
Harbor Side, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high69°
Average low55°
Average precipitation0.08 in
Chance of precipitation17%
Record high86° (2021)
Record low45° (2000)
Fri, 1369° / 54°0.02
69 °
Harbor Side, Friday, 13 November
Climate normal for this date — 60-year average.
Average high69°
Average low54°
Average precipitation0.02 in
Chance of precipitation10%
Record high83° (1975)
Record low46° (2000)
Sat, 1468° / 54°0.04
68 °
Harbor Side, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high68°
Average low54°
Average precipitation0.04 in
Chance of precipitation15%
Record high79° (2016)
Record low46° (2022)
Sun, 1568° / 54°0.05
68 °
Harbor Side, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high68°
Average low54°
Average precipitation0.05 in
Chance of precipitation17%
Record high86° (2008)
Record low45° (2022)
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 Harbor Side, 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 Harbor Side, 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.