Monthly outlook for South San Diego, CA: average high 80.8°, average low 73°. That is 2.7° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 10 August (86.5°), the coolest 10 August (68.9°).
80.8°/73°
Average high / low
+2.7°
Above normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.4°
75.9°
+1.9°
19 August – 28 August
83°
76.5°
+3.7°
29 August – 7 September
at normal
77.3°
—
August records over 66 years
88.3°12 August 1991All-time high
56.3°7 August 1991All-time low
Climate normals and records are computed from the nearest reference point — Imperial Beach (2 mi).
Mon, 1087° / 69°0
87 °
South San Diego, Monday, 10 August
Mostly clear. High 87°, low 69°.
Pressure29.94 inHg
Wind8.1 mph SW
Humidity62%
Visibility6.2 mi
Dew point64°
Tue, 1181° / 69°0
81 °
South San Diego, Tuesday, 11 August
Light rain. High 81°, low 69°.
Pressure29.97 inHg
Wind8.6 mph W
Humidity55%
Visibility6.2 mi
Dew point62°
Wed, 1280° / 74°0
80 °
South San Diego, Wednesday, 12 August
Clear. High 80°, low 74°.
Pressure29.91 inHg
Wind8.5 mph W
Humidity55%
Visibility6.2 mi
Dew point61°
Thu, 1375° / 71°0
75 °
South San Diego, Thursday, 13 August
Overcast. High 75°, low 71°.
Pressure29.91 inHg
Wind8.1 mph SW
Humidity66%
Visibility6.2 mi
Dew point62°
Fri, 1476° / 70°0
76 °
South San Diego, Friday, 14 August
Partly cloudy. High 76°, low 70°.
Pressure29.97 inHg
Wind9.4 mph W
Humidity60%
Visibility—
Dew point60°
Sat, 1575° / 71°0
75 °
South San Diego, Saturday, 15 August
Overcast. High 75°, low 71°.
Pressure30.03 inHg
Wind7.6 mph NW
Humidity61%
Visibility—
Dew point60°
Sun, 1678° / 72°0
78 °
South San Diego, Sunday, 16 August
Partly cloudy. High 78°, low 72°.
Pressure30.06 inHg
Wind11.6 mph NW
Humidity66%
Visibility—
Dew point63°
Mon, 1778° / 72°0
78 °
South San Diego, Monday, 17 August
Clear. High 78°, low 72°.
Pressure30.00 inHg
Wind11.3 mph NW
Humidity60%
Visibility—
Dew point61°
Tue, 1879° / 72°0
79 °
South San Diego, Tuesday, 18 August
Clear. High 79°, low 72°.
Pressure29.94 inHg
Wind9.7 mph W
Humidity56%
Visibility—
Dew point60°
Wed, 1982° / 74°0
82 °
South San Diego, Wednesday, 19 August
Mostly clear. High 82°, low 74°.
Pressure29.91 inHg
Wind8.2 mph W
Humidity55%
Visibility—
Dew point61°
Thu, 2084° / 75°0
84 °
South San Diego, Thursday, 20 August
Mostly clear. High 84°, low 75°.
Pressure29.91 inHg
Wind7.4 mph W
Humidity56%
Visibility—
Dew point63°
Fri, 2184° / 78°0
84 °
South San Diego, Friday, 21 August
Mostly clear. High 84°, low 78°.
Pressure29.97 inHg
Wind8.7 mph W
Humidity53%
Visibility—
Dew point63°
Sat, 2284° / 78°0
84 °
South San Diego, Saturday, 22 August
Overcast. High 84°, low 78°.
Pressure29.91 inHg
Wind7.8 mph W
Humidity49%
Visibility—
Dew point62°
Sun, 2383° / 76°0
83 °
South San Diego, Sunday, 23 August
Clear. High 83°, low 76°.
Pressure29.94 inHg
Wind8.4 mph W
Humidity60%
Visibility—
Dew point63°
Mon, 2482° / 75°0
82 °
South San Diego, Monday, 24 August
Mostly clear. High 82°, low 75°.
Pressure29.94 inHg
Wind7.9 mph W
Humidity55%
Visibility—
Dew point63°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 65°0
77 °
South San Diego, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0 in
Chance of precipitation2%
Record high86° (1985)
Record low58° (1987)
Wed, 2677° / 65°0
77 °
South San Diego, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0 in
Chance of precipitation5%
Record high87° (1981)
Record low58° (1987)
Thu, 2778° / 66°0
78 °
South San Diego, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high88° (2009)
Record low59° (1960)
Fri, 2878° / 65°0.01
78 °
South San Diego, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.01 in
Chance of precipitation2%
Record high88° (2015)
Record low57° (1973)
Sat, 2978° / 65°0
78 °
South San Diego, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high86° (1998)
Record low58° (2002)
Sun, 3077° / 65°0
77 °
South San Diego, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0 in
Chance of precipitation3%
Record high88° (1967)
Record low60° (1974)
Mon, 3177° / 65°0
77 °
South San Diego, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high87° (2017)
Record low58° (2010)
Tue, 0177° / 65°0.01
77 °
South San Diego, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.01 in
Chance of precipitation2%
Record high88° (1967)
Record low58° (1973)
Wed, 0277° / 65°0.01
77 °
South San Diego, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.01 in
Chance of precipitation3%
Record high85° (2017)
Record low58° (1973)
Thu, 0377° / 65°0.01
77 °
South San Diego, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.01 in
Chance of precipitation5%
Record high99° (1988)
Record low59° (1973)
Fri, 0478° / 66°0
78 °
South San Diego, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high101° (1988)
Record low59° (1999)
Sat, 0578° / 65°0
78 °
South San Diego, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0 in
Chance of precipitation2%
Record high96° (1988)
Record low58° (1999)
Sun, 0678° / 66°0
78 °
South San Diego, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0 in
Chance of precipitation5%
Record high92° (2020)
Record low56° (1973)
Mon, 0778° / 65°0.01
78 °
South San Diego, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.01 in
Chance of precipitation5%
Record high89° (2024)
Record low56° (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 South San Diego, 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 South San Diego, 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.