Monthly outlook for Heritage Terrace, AZ: average high 104.3°, average low 88.2°. That is 3.5° above the climate normal for August. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 10 August (122.6°), the coolest 13 August (81.3°).
104.3°/88.2°
Average high / low
+3.5°
Above normal
4 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
104.1°
98.2°
+3.3°
19 August – 28 August
104.6°
97.8°
+3.8°
29 August – 7 September
at normal
97.3°
—
August records over 66 years
113.2°7 August 2025All-time high
60.1°21 August 1979All-time low
Climate normals and records are computed from the nearest reference point — Scottsdale (9 mi).
Mon, 10123° / 88°0.01
123 °
Heritage Terrace, Monday, 10 August
Light rain. High 123°, low 88°.
Pressure29.83 inHg
Wind9.3 mph W
Humidity27%
Visibility6.2 mi
Dew point62°
Tue, 11104° / 85°0.04
104 °
Heritage Terrace, Tuesday, 11 August
Light rain. High 104°, low 85°.
Pressure29.88 inHg
Wind8.8 mph W
Humidity30%
Visibility6.2 mi
Dew point61°
Wed, 12100° / 88°0.06
100 °
Heritage Terrace, Wednesday, 12 August
Light rain. High 100°, low 88°.
Pressure29.80 inHg
Wind7.4 mph W
Humidity31%
Visibility6.2 mi
Dew point61°
Thu, 1397° / 81°0.29
97 °
Heritage Terrace, Thursday, 13 August
Rain. High 97°, low 81°.
Pressure29.83 inHg
Wind5.7 mph S
Humidity37%
Visibility6.2 mi
Dew point61°
Fri, 1497° / 86°0.04
97 °
Heritage Terrace, Friday, 14 August
Light rain. High 97°, low 86°.
Pressure29.88 inHg
Wind10.3 mph S
Humidity25%
Visibility—
Dew point51°
Sat, 1598° / 90°0
98 °
Heritage Terrace, Saturday, 15 August
Overcast. High 98°, low 90°.
Pressure29.97 inHg
Wind9 mph NW
Humidity24%
Visibility—
Dew point50°
Sun, 16100° / 90°0
100 °
Heritage Terrace, Sunday, 16 August
Overcast. High 100°, low 90°.
Pressure29.97 inHg
Wind9.8 mph W
Humidity24%
Visibility—
Dew point50°
Mon, 17102° / 91°0
102 °
Heritage Terrace, Monday, 17 August
Clear. High 102°, low 91°.
Pressure29.88 inHg
Wind8.5 mph W
Humidity24%
Visibility—
Dew point53°
Tue, 18106° / 94°0
106 °
Heritage Terrace, Tuesday, 18 August
Clear. High 106°, low 94°.
Pressure29.85 inHg
Wind10 mph W
Humidity17%
Visibility—
Dew point47°
Wed, 19104° / 90°0
104 °
Heritage Terrace, Wednesday, 19 August
Partly cloudy. High 104°, low 90°.
Pressure29.88 inHg
Wind11.6 mph E
Humidity31%
Visibility—
Dew point60°
Thu, 20104° / 91°0.03
104 °
Heritage Terrace, Thursday, 20 August
Light rain. High 104°, low 91°.
Pressure29.91 inHg
Wind11.9 mph SE
Humidity29%
Visibility—
Dew point59°
Fri, 21106° / 83°0.11
106 °
Heritage Terrace, Friday, 21 August
Light rain. High 106°, low 83°.
Pressure29.94 inHg
Wind14 mph SE
Humidity35%
Visibility—
Dew point63°
Sat, 22102° / 84°0
102 °
Heritage Terrace, Saturday, 22 August
Mostly clear. High 102°, low 84°.
Pressure29.88 inHg
Wind7 mph SW
Humidity34%
Visibility—
Dew point60°
Sun, 23108° / 93°0.01
108 °
Heritage Terrace, Sunday, 23 August
Light rain. High 108°, low 93°.
Pressure29.85 inHg
Wind10.1 mph E
Humidity25%
Visibility—
Dew point57°
Mon, 24104° / 90°0
104 °
Heritage Terrace, Monday, 24 August
Partly cloudy. High 104°, low 90°.
Pressure29.88 inHg
Wind12 mph N
Humidity28%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2598° / 76°0.03
98 °
Heritage Terrace, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.03 in
Chance of precipitation25%
Record high108° (2011)
Record low66° (2002)
Wed, 2698° / 76°0.03
98 °
Heritage Terrace, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.03 in
Chance of precipitation20%
Record high108° (2001)
Record low66° (1960)
Thu, 2798° / 76°0.04
98 °
Heritage Terrace, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.04 in
Chance of precipitation20%
Record high108° (2011)
Record low66° (1992)
Fri, 2899° / 76°0.04
99 °
Heritage Terrace, Friday, 28 August
Climate normal for this date — 60-year average.
Average high99°
Average low76°
Average precipitation0.04 in
Chance of precipitation15%
Record high110° (2023)
Record low66° (1978)
Sat, 2999° / 76°0.04
99 °
Heritage Terrace, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high99°
Average low76°
Average precipitation0.04 in
Chance of precipitation22%
Record high109° (2023)
Record low66° (1960)
Sun, 3098° / 76°0.02
98 °
Heritage Terrace, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.02 in
Chance of precipitation17%
Record high107° (2022)
Record low66° (1992)
Mon, 3198° / 76°0.03
98 °
Heritage Terrace, Monday, 31 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.03 in
Chance of precipitation18%
Record high107° (2011)
Record low64° (1962)
Tue, 0197° / 76°0.03
97 °
Heritage Terrace, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high97°
Average low76°
Average precipitation0.03 in
Chance of precipitation18%
Record high106° (1982)
Record low64° (1992)
Wed, 0297° / 75°0.04
97 °
Heritage Terrace, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high97°
Average low75°
Average precipitation0.04 in
Chance of precipitation22%
Record high106° (1982)
Record low60° (1992)
Thu, 0398° / 75°0.01
98 °
Heritage Terrace, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high98°
Average low75°
Average precipitation0.01 in
Chance of precipitation12%
Record high106° (2022)
Record low63° (1961)
Fri, 0497° / 75°0.06
97 °
Heritage Terrace, Friday, 4 September
Climate normal for this date — 60-year average.
Average high97°
Average low75°
Average precipitation0.06 in
Chance of precipitation13%
Record high109° (2020)
Record low60° (1961)
Sat, 0597° / 75°0.1
97 °
Heritage Terrace, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high97°
Average low75°
Average precipitation0.1 in
Chance of precipitation22%
Record high110° (2020)
Record low59° (1992)
Sun, 0696° / 75°0.05
96 °
Heritage Terrace, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high96°
Average low75°
Average precipitation0.05 in
Chance of precipitation20%
Record high107° (2020)
Record low60° (1992)
Mon, 0796° / 74°0.03
96 °
Heritage Terrace, Monday, 7 September
Climate normal for this date — 60-year average.
Average high96°
Average low74°
Average precipitation0.03 in
Chance of precipitation13%
Record high106° (1979)
Record low63° (1992)
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 Heritage Terrace, 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 Heritage Terrace, 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.