Monthly outlook for Highland Park, AZ: average high 87.4°, average low 66.8°. That is 1° above the climate normal for August. Precipitation is expected on 10 days (about 3.5 inches), against a normal of 6 days and 1.1 inches. The warmest day looks like 9 August (103.3°), the coolest 11 August (61.8°).
87.4°/66.8°
Average high / low
+1°
Above normal
10 / 6
Wet days / normal
3.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.5°
86°
-0.8°
19 August – 28 August
92.1°
85°
+4°
29 August – 7 September
at normal
84.4°
—
August records over 66 years
100.8°15 August 2020All-time high
44.1°23 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Williamson (10 mi).
Mon, 1096° / 69°0.73
96 °
Highland Park, Monday, 10 August
Heavy rain. High 96°, low 69°.
Pressure29.94 inHg
Wind6.3 mph W
Humidity28%
Visibility6.2 mi
Dew point52°
Tue, 1185° / 62°0.55
85 °
Highland Park, Tuesday, 11 August
Heavy rain. High 85°, low 62°.
Pressure29.97 inHg
Wind9.4 mph W
Humidity33%
Visibility6.2 mi
Dew point53°
Wed, 1279° / 64°0.15
79 °
Highland Park, Wednesday, 12 August
Light rain. High 79°, low 64°.
Pressure29.94 inHg
Wind8.2 mph SW
Humidity48%
Visibility6.2 mi
Dew point56°
Thu, 1374° / 63°1.31
74 °
Highland Park, Thursday, 13 August
Rain. High 74°, low 63°.
Pressure29.91 inHg
Wind13 mph SW
Humidity61%
Visibility—
Dew point55°
Fri, 1476° / 63°0.16
76 °
Highland Park, Friday, 14 August
Light rain. High 76°, low 63°.
Pressure30.00 inHg
Wind8.1 mph S
Humidity51%
Visibility—
Dew point52°
Sat, 1578° / 65°0
78 °
Highland Park, Saturday, 15 August
Overcast. High 78°, low 65°.
Pressure30.06 inHg
Wind8.1 mph SW
Humidity37%
Visibility—
Dew point47°
Sun, 1682° / 65°0
82 °
Highland Park, Sunday, 16 August
Mostly clear. High 82°, low 65°.
Pressure30.09 inHg
Wind11.8 mph SW
Humidity35%
Visibility—
Dew point48°
Mon, 1785° / 67°0.24
85 °
Highland Park, Monday, 17 August
Rain. High 85°, low 67°.
Pressure30.06 inHg
Wind9.6 mph E
Humidity34%
Visibility—
Dew point49°
Tue, 1887° / 66°0.07
87 °
Highland Park, Tuesday, 18 August
Light rain. High 87°, low 66°.
Pressure30.03 inHg
Wind8.5 mph NW
Humidity35%
Visibility—
Dew point50°
Wed, 1991° / 66°0.09
91 °
Highland Park, Wednesday, 19 August
Light rain. High 91°, low 66°.
Pressure29.97 inHg
Wind11.1 mph NE
Humidity27%
Visibility—
Dew point47°
Thu, 2091° / 70°0.06
91 °
Highland Park, Thursday, 20 August
Light rain. High 91°, low 70°.
Pressure29.97 inHg
Wind11.2 mph W
Humidity29%
Visibility—
Dew point48°
Fri, 2192° / 71°0.02
92 °
Highland Park, Friday, 21 August
Light rain. High 92°, low 71°.
Pressure29.91 inHg
Wind9.1 mph W
Humidity25%
Visibility—
Dew point45°
Sat, 2293° / 71°0.01
93 °
Highland Park, Saturday, 22 August
Light rain. High 93°, low 71°.
Pressure29.94 inHg
Wind15.1 mph W
Humidity26%
Visibility—
Dew point47°
Sun, 2393° / 71°0.03
93 °
Highland Park, Sunday, 23 August
Light rain. High 93°, low 71°.
Pressure30.00 inHg
Wind20.8 mph NE
Humidity21%
Visibility—
Dew point44°
Mon, 2493° / 68°0.05
93 °
Highland Park, Monday, 24 August
Light rain. High 93°, low 68°.
Pressure29.97 inHg
Wind23.1 mph E
Humidity25%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 63°0.08
84 °
Highland Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low63°
Average precipitation0.08 in
Chance of precipitation47%
Record high93° (2011)
Record low53° (1990)
Wed, 2685° / 63°0.09
85 °
Highland Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low63°
Average precipitation0.09 in
Chance of precipitation37%
Record high96° (2011)
Record low55° (1990)
Thu, 2785° / 63°0.06
85 °
Highland Park, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low63°
Average precipitation0.06 in
Chance of precipitation30%
Record high97° (2011)
Record low55° (1972)
Fri, 2886° / 63°0.04
86 °
Highland Park, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low63°
Average precipitation0.04 in
Chance of precipitation23%
Record high95° (2023)
Record low57° (2016)
Sat, 2986° / 64°0.06
86 °
Highland Park, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low64°
Average precipitation0.06 in
Chance of precipitation27%
Record high97° (2023)
Record low54° (1979)
Sun, 3086° / 64°0.06
86 °
Highland Park, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low64°
Average precipitation0.06 in
Chance of precipitation27%
Record high96° (2023)
Record low53° (2010)
Mon, 3185° / 63°0.05
85 °
Highland Park, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low63°
Average precipitation0.05 in
Chance of precipitation32%
Record high94° (2019)
Record low54° (2010)
Tue, 0184° / 63°0.05
84 °
Highland Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low63°
Average precipitation0.05 in
Chance of precipitation30%
Record high93° (2011)
Record low53° (1966)
Wed, 0284° / 62°0.06
84 °
Highland Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (1995)
Record low51° (2000)
Thu, 0385° / 62°0.04
85 °
Highland Park, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low62°
Average precipitation0.04 in
Chance of precipitation18%
Record high96° (2020)
Record low47° (1961)
Fri, 0484° / 62°0.06
84 °
Highland Park, Friday, 4 September
Climate normal for this date — 60-year average.
Average high84°
Average low62°
Average precipitation0.06 in
Chance of precipitation33%
Record high98° (2020)
Record low46° (1961)
Sat, 0584° / 62°0.07
84 °
Highland Park, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high84°
Average low62°
Average precipitation0.07 in
Chance of precipitation35%
Record high97° (2020)
Record low50° (1985)
Sun, 0683° / 61°0.06
83 °
Highland Park, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low61°
Average precipitation0.06 in
Chance of precipitation25%
Record high99° (2020)
Record low47° (1970)
Mon, 0783° / 62°0.07
83 °
Highland Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high83°
Average low62°
Average precipitation0.07 in
Chance of precipitation18%
Record high98° (2020)
Record low48° (1985)
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 Park, AZ 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 Park, AZ 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.