Monthly outlook for McCormick Ranch, AZ: average high 104.8°, average low 88.9°. That is 3.7° 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 9 August (113.2°), the coolest 13 August (80.3°).
104.8°/88.9°
Average high / low
+3.7°
Above normal
4 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
104.4°
98.4°
+3.3°
18 August – 27 August
105.4°
97.6°
+4.3°
28 August – 6 September
at normal
97.6°
—
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 (10 mi).
Sun, 09113° / 89°0
113 °
McCormick Ranch, Sunday, 9 August
Light rain. High 113°, low 89°.
Pressure29.80 inHg
Wind5.6 mph W
Humidity20%
Visibility6.2 mi
Dew point54°
Mon, 10106° / 88°0.06
106 °
McCormick Ranch, Monday, 10 August
Light rain. High 106°, low 88°.
Pressure29.85 inHg
Wind8.8 mph W
Humidity28%
Visibility6.2 mi
Dew point60°
Tue, 11103° / 84°0.02
103 °
McCormick Ranch, Tuesday, 11 August
Light rain. High 103°, low 84°.
Pressure29.88 inHg
Wind7.7 mph W
Humidity35%
Visibility6.2 mi
Dew point64°
Wed, 12102° / 85°0.09
102 °
McCormick Ranch, Wednesday, 12 August
Light rain. High 102°, low 85°.
Pressure29.85 inHg
Wind15.3 mph W
Humidity37%
Visibility—
Dew point63°
Thu, 1398° / 80°0.26
98 °
McCormick Ranch, Thursday, 13 August
Rain. High 98°, low 80°.
Pressure29.85 inHg
Wind12 mph NE
Humidity38%
Visibility—
Dew point61°
Fri, 14102° / 89°0
102 °
McCormick Ranch, Friday, 14 August
Clear. High 102°, low 89°.
Pressure29.91 inHg
Wind9.1 mph W
Humidity27%
Visibility—
Dew point55°
Sat, 15105° / 93°0
105 °
McCormick Ranch, Saturday, 15 August
Overcast. High 105°, low 93°.
Pressure29.88 inHg
Wind12.8 mph W
Humidity22%
Visibility—
Dew point53°
Sun, 16103° / 90°0.02
103 °
McCormick Ranch, Sunday, 16 August
Light rain. High 103°, low 90°.
Pressure29.94 inHg
Wind12.8 mph NE
Humidity26%
Visibility—
Dew point55°
Mon, 17102° / 88°0.02
102 °
McCormick Ranch, Monday, 17 August
Light rain. High 102°, low 88°.
Pressure29.97 inHg
Wind8.2 mph W
Humidity34%
Visibility—
Dew point61°
Tue, 18105° / 87°0.05
105 °
McCormick Ranch, Tuesday, 18 August
Light rain. High 105°, low 87°.
Pressure29.85 inHg
Wind22.8 mph S
Humidity30%
Visibility—
Dew point61°
Wed, 19102° / 87°0.02
102 °
McCormick Ranch, Wednesday, 19 August
Light rain. High 102°, low 87°.
Pressure29.85 inHg
Wind9.6 mph W
Humidity36%
Visibility—
Dew point63°
Thu, 20106° / 94°0.01
106 °
McCormick Ranch, Thursday, 20 August
Light rain. High 106°, low 94°.
Pressure29.85 inHg
Wind11.4 mph S
Humidity25%
Visibility—
Dew point57°
Fri, 21106° / 92°0.02
106 °
McCormick Ranch, Friday, 21 August
Light rain. High 106°, low 92°.
Pressure29.91 inHg
Wind10.6 mph W
Humidity27%
Visibility—
Dew point58°
Sat, 22107° / 93°0
107 °
McCormick Ranch, Saturday, 22 August
Overcast. High 107°, low 93°.
Pressure29.88 inHg
Wind13.6 mph W
Humidity25%
Visibility—
Dew point57°
Sun, 23105° / 94°0.01
105 °
McCormick Ranch, Sunday, 23 August
Light rain. High 105°, low 94°.
Pressure29.85 inHg
Wind13.9 mph W
Humidity24%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2498° / 76°0.03
98 °
McCormick Ranch, Monday, 24 August
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.03 in
Chance of precipitation22%
Record high110° (2020)
Record low65° (1992)
Tue, 2598° / 76°0.03
98 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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 °
McCormick Ranch, 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)
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 McCormick Ranch, 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 McCormick Ranch, 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.