Monthly outlook for Arrowhead Highlands, CA: average high 84.4°, average low 59.7°. That is 3.8° below 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 18 August (89.4°), the coolest 14 August (54.7°).
84.4°/59.7°
Average high / low
−3.8°
Below 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
83.8°
91.9°
-4.5°
18 August – 27 August
85.3°
91°
-3.2°
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 (6 mi).
Sun, 0989° / 64°0
89 °
Arrowhead Highlands, Sunday, 9 August
Clear. High 89°, low 64°.
Pressure29.85 inHg
Wind10.3 mph SW
Humidity16%
Visibility6.2 mi
Dew point42°
Mon, 1088° / 65°0
88 °
Arrowhead Highlands, Monday, 10 August
Clear. High 88°, low 65°.
Pressure29.91 inHg
Wind8.6 mph SW
Humidity19%
Visibility6.2 mi
Dew point43°
Tue, 1185° / 63°0
85 °
Arrowhead Highlands, Tuesday, 11 August
Light rain. High 85°, low 63°.
Pressure29.97 inHg
Wind8 mph SW
Humidity22%
Visibility6.2 mi
Dew point43°
Wed, 1282° / 60°0
82 °
Arrowhead Highlands, Wednesday, 12 August
Mostly clear. High 82°, low 60°.
Pressure29.91 inHg
Wind8.7 mph S
Humidity26%
Visibility6.2 mi
Dew point45°
Thu, 1376° / 58°0
76 °
Arrowhead Highlands, Thursday, 13 August
Overcast. High 76°, low 58°.
Pressure29.94 inHg
Wind8.5 mph SW
Humidity38%
Visibility—
Dew point40°
Fri, 1478° / 55°0
78 °
Arrowhead Highlands, Friday, 14 August
Overcast. High 78°, low 55°.
Pressure30.00 inHg
Wind10 mph S
Humidity38%
Visibility—
Dew point42°
Sat, 1584° / 56°0
84 °
Arrowhead Highlands, Saturday, 15 August
Clear. High 84°, low 56°.
Pressure30.03 inHg
Wind10.5 mph SW
Humidity28%
Visibility—
Dew point40°
Sun, 1685° / 59°0
85 °
Arrowhead Highlands, Sunday, 16 August
Overcast. High 85°, low 59°.
Pressure30.03 inHg
Wind9.7 mph SW
Humidity19%
Visibility—
Dew point32°
Mon, 1787° / 62°0
87 °
Arrowhead Highlands, Monday, 17 August
Mostly clear. High 87°, low 62°.
Pressure30.03 inHg
Wind10.4 mph SW
Humidity17%
Visibility—
Dew point32°
Tue, 1889° / 64°0
89 °
Arrowhead Highlands, Tuesday, 18 August
Overcast. High 89°, low 64°.
Pressure29.97 inHg
Wind10 mph SW
Humidity20%
Visibility—
Dew point36°
Wed, 1989° / 64°0
89 °
Arrowhead Highlands, Wednesday, 19 August
Partly cloudy. High 89°, low 64°.
Pressure29.94 inHg
Wind10 mph SW
Humidity23%
Visibility—
Dew point40°
Thu, 2085° / 61°0
85 °
Arrowhead Highlands, Thursday, 20 August
Clear. High 85°, low 61°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity24%
Visibility—
Dew point39°
Fri, 2184° / 57°0
84 °
Arrowhead Highlands, Friday, 21 August
Clear. High 84°, low 57°.
Pressure29.91 inHg
Wind10 mph SW
Humidity18%
Visibility—
Dew point29°
Sat, 2282° / 55°0
82 °
Arrowhead Highlands, Saturday, 22 August
Mostly clear. High 82°, low 55°.
Pressure29.97 inHg
Wind8.7 mph SW
Humidity21%
Visibility—
Dew point32°
Sun, 2383° / 56°0
83 °
Arrowhead Highlands, Sunday, 23 August
Clear. High 83°, low 56°.
Pressure29.94 inHg
Wind10.3 mph SW
Humidity26%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2492° / 67°0.01
92 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 °
Arrowhead Highlands, 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 Arrowhead Highlands, 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 Arrowhead Highlands, 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.