Monthly outlook for Highland, CA: average high 96.3°, average low 73.2°. That is 2.8° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 8 August (101.6°), the coolest 8 August (67.4°).
96.3°/73.2°
Average high / low
+2.8°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
95.5°
91.9°
+2°
18 August – 27 August
97.6°
91°
+3.7°
28 August – 6 September
at normal
92.8°
—
August records over 66 years
111.7°18 August 2020All-time high
49.5°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — San Bernardino (8 mi).
Sun, 09100° / 75°0
100 °
Highland, Sunday, 9 August
Clear. High 100°, low 75°.
Pressure29.85 inHg
Wind10.1 mph W
Humidity18%
Visibility6.2 mi
Dew point46°
Mon, 1099° / 75°0
99 °
Highland, Monday, 10 August
Partly cloudy. High 99°, low 75°.
Pressure29.91 inHg
Wind9.3 mph SW
Humidity21%
Visibility6.2 mi
Dew point48°
Tue, 1194° / 73°0
94 °
Highland, Tuesday, 11 August
Overcast. High 94°, low 73°.
Pressure29.97 inHg
Wind9.1 mph SW
Humidity22%
Visibility6.2 mi
Dew point46°
Wed, 1292° / 72°0
92 °
Highland, Wednesday, 12 August
Light rain. High 92°, low 72°.
Pressure29.91 inHg
Wind6.9 mph SW
Humidity26%
Visibility6.2 mi
Dew point47°
Thu, 1390° / 69°0
90 °
Highland, Thursday, 13 August
Overcast. High 90°, low 69°.
Pressure29.94 inHg
Wind9.4 mph W
Humidity38%
Visibility—
Dew point51°
Fri, 1490° / 69°0
90 °
Highland, Friday, 14 August
Overcast. High 90°, low 69°.
Pressure29.97 inHg
Wind8.7 mph W
Humidity32%
Visibility—
Dew point50°
Sat, 1596° / 70°0
96 °
Highland, Saturday, 15 August
Clear. High 96°, low 70°.
Pressure30.00 inHg
Wind9.6 mph SW
Humidity27%
Visibility—
Dew point49°
Sun, 1697° / 73°0
97 °
Highland, Sunday, 16 August
Overcast. High 97°, low 73°.
Pressure30.00 inHg
Wind9.1 mph W
Humidity23%
Visibility—
Dew point47°
Mon, 1797° / 73°0
97 °
Highland, Monday, 17 August
Partly cloudy. High 97°, low 73°.
Pressure30.06 inHg
Wind9.5 mph W
Humidity21%
Visibility—
Dew point45°
Tue, 1898° / 75°0
98 °
Highland, Tuesday, 18 August
Clear. High 98°, low 75°.
Pressure29.97 inHg
Wind9.2 mph W
Humidity20%
Visibility—
Dew point46°
Wed, 19100° / 76°0
100 °
Highland, Wednesday, 19 August
Clear. High 100°, low 76°.
Pressure29.91 inHg
Wind9.3 mph W
Humidity21%
Visibility—
Dew point47°
Thu, 2099° / 76°0
99 °
Highland, Thursday, 20 August
Partly cloudy. High 99°, low 76°.
Pressure29.91 inHg
Wind9.7 mph W
Humidity24%
Visibility—
Dew point50°
Fri, 2197° / 76°0
97 °
Highland, Friday, 21 August
Overcast. High 97°, low 76°.
Pressure29.88 inHg
Wind8.5 mph W
Humidity28%
Visibility—
Dew point54°
Sat, 2296° / 76°0.04
96 °
Highland, Saturday, 22 August
Light rain. High 96°, low 76°.
Pressure29.88 inHg
Wind10.1 mph W
Humidity31%
Visibility—
Dew point56°
Sun, 2396° / 76°0
96 °
Highland, Sunday, 23 August
Overcast. High 96°, low 76°.
Pressure29.88 inHg
Wind10.8 mph W
Humidity34%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2492° / 67°0.01
92 °
Highland, Monday, 24 August
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation10%
Record high107° (2010)
Record low55° (1983)
Tue, 2592° / 68°0.02
92 °
Highland, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high92°
Average low68°
Average precipitation0.02 in
Chance of precipitation10%
Record high104° (1985)
Record low56° (1990)
Wed, 2692° / 68°0.02
92 °
Highland, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high92°
Average low68°
Average precipitation0.02 in
Chance of precipitation10%
Record high103° (2011)
Record low55° (1973)
Thu, 2793° / 67°0.01
93 °
Highland, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0.01 in
Chance of precipitation8%
Record high105° (2021)
Record low55° (1973)
Fri, 2894° / 67°0.01
94 °
Highland, Friday, 28 August
Climate normal for this date — 60-year average.
Average high94°
Average low67°
Average precipitation0.01 in
Chance of precipitation3%
Record high107° (2017)
Record low55° (1973)
Sat, 2994° / 68°0.01
94 °
Highland, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high94°
Average low68°
Average precipitation0.01 in
Chance of precipitation10%
Record high107° (2017)
Record low55° (2010)
Sun, 3093° / 68°0.02
93 °
Highland, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high93°
Average low68°
Average precipitation0.02 in
Chance of precipitation12%
Record high108° (2017)
Record low55° (2010)
Mon, 3192° / 67°0.01
92 °
Highland, Monday, 31 August
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation7%
Record high107° (2022)
Record low54° (1964)
Tue, 0192° / 66°0.02
92 °
Highland, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0.02 in
Chance of precipitation10%
Record high107° (2017)
Record low54° (1964)
Wed, 0292° / 66°0.04
92 °
Highland, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0.04 in
Chance of precipitation15%
Record high105° (2007)
Record low50° (1964)
Thu, 0392° / 67°0.02
92 °
Highland, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.02 in
Chance of precipitation10%
Record high110° (2022)
Record low55° (1999)
Fri, 0492° / 67°0.01
92 °
Highland, Friday, 4 September
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation8%
Record high109° (2022)
Record low54° (1985)
Sat, 0592° / 67°0.01
92 °
Highland, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation7%
Record high113° (2020)
Record low56° (2016)
Sun, 0692° / 67°0.01
92 °
Highland, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high92°
Average low67°
Average precipitation0.01 in
Chance of precipitation8%
Record high115° (2020)
Record low55° (2000)
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 Highland, 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 Highland, 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.