Monthly outlook for San Jose, CA: average high 91.2°, average low 59°. That is 3.4° 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 11 August (102.3°), the coolest 17 August (55.5°).
91.2°/59°
Average high / low
+3.4°
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
91.6°
85.7°
+3.3°
19 August – 28 August
90.5°
84.6°
+3.2°
29 August – 7 September
at normal
85.7°
—
August records over 66 years
107.4°4 August 1998All-time high
50°23 August 1973All-time low
Mon, 1095° / 66°0
95 °
San Jose, Monday, 10 August
Overcast. High 95°, low 66°.
Pressure29.85 inHg
Wind2.5 mph S
Humidity14%
Visibility6.2 mi
Dew point42°
Tue, 11102° / 64°0
102 °
San Jose, Tuesday, 11 August
Clear. High 102°, low 64°.
Pressure29.88 inHg
Wind2.8 mph SW
Humidity12%
Visibility6.2 mi
Dew point36°
Wed, 1296° / 59°0
96 °
San Jose, Wednesday, 12 August
Clear. High 96°, low 59°.
Pressure29.83 inHg
Wind5.4 mph S
Humidity19%
Visibility6.2 mi
Dew point44°
Thu, 1385° / 57°0
85 °
San Jose, Thursday, 13 August
Clear. High 85°, low 57°.
Pressure29.83 inHg
Wind7.2 mph SW
Humidity31%
Visibility—
Dew point48°
Fri, 1491° / 56°0
91 °
San Jose, Friday, 14 August
Clear. High 91°, low 56°.
Pressure29.88 inHg
Wind5.2 mph S
Humidity23%
Visibility—
Dew point44°
Sat, 1593° / 57°0
93 °
San Jose, Saturday, 15 August
Partly cloudy. High 93°, low 57°.
Pressure29.94 inHg
Wind3.5 mph S
Humidity19%
Visibility—
Dew point41°
Sun, 1690° / 59°0
90 °
San Jose, Sunday, 16 August
Overcast. High 90°, low 59°.
Pressure30.00 inHg
Wind4.1 mph W
Humidity28%
Visibility—
Dew point50°
Mon, 1788° / 56°0
88 °
San Jose, Monday, 17 August
Partly cloudy. High 88°, low 56°.
Pressure30.03 inHg
Wind6.2 mph NW
Humidity21%
Visibility—
Dew point40°
Tue, 1886° / 57°0
86 °
San Jose, Tuesday, 18 August
Clear. High 86°, low 57°.
Pressure29.97 inHg
Wind11.1 mph NW
Humidity35%
Visibility—
Dew point53°
Wed, 1986° / 64°0
86 °
San Jose, Wednesday, 19 August
Clear. High 86°, low 64°.
Pressure29.94 inHg
Wind11.6 mph NW
Humidity38%
Visibility—
Dew point55°
Thu, 2084° / 61°0
84 °
San Jose, Thursday, 20 August
Overcast. High 84°, low 61°.
Pressure29.94 inHg
Wind11.9 mph NW
Humidity43%
Visibility—
Dew point57°
Fri, 2190° / 57°0
90 °
San Jose, Friday, 21 August
Overcast. High 90°, low 57°.
Pressure29.91 inHg
Wind8.6 mph NW
Humidity24%
Visibility—
Dew point45°
Sat, 2293° / 56°0
93 °
San Jose, Saturday, 22 August
Mostly clear. High 93°, low 56°.
Pressure29.91 inHg
Wind7.7 mph NW
Humidity18%
Visibility—
Dew point39°
Sun, 2395° / 58°0
95 °
San Jose, Sunday, 23 August
Clear. High 95°, low 58°.
Pressure29.88 inHg
Wind5.9 mph NW
Humidity17%
Visibility—
Dew point40°
Mon, 2496° / 56°0
96 °
San Jose, Monday, 24 August
Clear. High 96°, low 56°.
Pressure29.83 inHg
Wind4.2 mph S
Humidity13%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 60°0
84 °
San Jose, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low60°
Average precipitation0 in
Chance of precipitation0%
Record high101° (1988)
Record low55° (1963)
Wed, 2685° / 60°0
85 °
San Jose, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low60°
Average precipitation0 in
Chance of precipitation0%
Record high99° (1988)
Record low53° (2018)
Thu, 2787° / 61°0
87 °
San Jose, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low61°
Average precipitation0 in
Chance of precipitation0%
Record high99° (1962)
Record low52° (1960)
Fri, 2887° / 62°0
87 °
San Jose, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low62°
Average precipitation0 in
Chance of precipitation0%
Record high104° (2021)
Record low53° (1995)
Sat, 2985° / 62°0
85 °
San Jose, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low62°
Average precipitation0 in
Chance of precipitation0%
Record high102° (2009)
Record low53° (1980)
Sun, 3084° / 61°0
84 °
San Jose, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low61°
Average precipitation0 in
Chance of precipitation2%
Record high99° (1976)
Record low52° (2010)
Mon, 3185° / 61°0
85 °
San Jose, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low61°
Average precipitation0 in
Chance of precipitation0%
Record high99° (1998)
Record low54° (1964)
Tue, 0186° / 61°0
86 °
San Jose, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low61°
Average precipitation0 in
Chance of precipitation2%
Record high105° (2017)
Record low53° (1964)
Wed, 0286° / 63°0
86 °
San Jose, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low63°
Average precipitation0 in
Chance of precipitation0%
Record high107° (2017)
Record low53° (1960)
Thu, 0386° / 62°0
86 °
San Jose, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low62°
Average precipitation0 in
Chance of precipitation2%
Record high101° (1988)
Record low53° (1995)
Fri, 0485° / 62°0
85 °
San Jose, Friday, 4 September
Climate normal for this date — 60-year average.
Average high85°
Average low62°
Average precipitation0 in
Chance of precipitation2%
Record high104° (1988)
Record low53° (2020)
Sat, 0587° / 62°0
87 °
San Jose, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high87°
Average low62°
Average precipitation0 in
Chance of precipitation3%
Record high105° (2022)
Record low51° (1965)
Sun, 0687° / 63°0
87 °
San Jose, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high87°
Average low63°
Average precipitation0 in
Chance of precipitation0%
Record high115° (2022)
Record low54° (1973)
Mon, 0787° / 63°0
87 °
San Jose, Monday, 7 September
Climate normal for this date — 60-year average.
Average high87°
Average low63°
Average precipitation0 in
Chance of precipitation0%
Record high107° (2020)
Record low52° (1978)
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 San Jose, 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 San Jose, 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.