Monthly outlook for Tempe Cascade, AZ: average high 105.6°, average low 88.9°. That is 1.8° above the climate normal for August. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 9 August (113.6°), the coolest 13 August (82.2°).
105.6°/88.9°
Average high / low
+1.8°
Above normal
4 / 3
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
105°
102.6°
+1.3°
18 August – 27 August
106.7°
101.8°
+2.7°
28 August – 6 September
at normal
101.7°
—
August records over 66 years
116.8°7 August 2025All-time high
64.6°21 August 1979All-time low
Climate normals and records are computed from the nearest reference point — Tempe (4 mi).
Sun, 09114° / 90°0
114 °
Tempe Cascade, Sunday, 9 August
Clear. High 114°, low 90°.
Pressure29.80 inHg
Wind6.4 mph NW
Humidity20%
Visibility6.2 mi
Dew point55°
Mon, 10107° / 88°0.04
107 °
Tempe Cascade, Monday, 10 August
Light rain. High 107°, low 88°.
Pressure29.83 inHg
Wind7.1 mph W
Humidity26%
Visibility6.2 mi
Dew point60°
Tue, 11103° / 85°0.02
103 °
Tempe Cascade, Tuesday, 11 August
Light rain. High 103°, low 85°.
Pressure29.88 inHg
Wind6.9 mph NW
Humidity34%
Visibility6.2 mi
Dew point64°
Wed, 12101° / 86°0.17
101 °
Tempe Cascade, Wednesday, 12 August
Light rain. High 101°, low 86°.
Pressure29.83 inHg
Wind8.2 mph W
Humidity35%
Visibility6.2 mi
Dew point64°
Thu, 13100° / 82°0.14
100 °
Tempe Cascade, Thursday, 13 August
Light rain. High 100°, low 82°.
Pressure29.83 inHg
Wind9.2 mph S
Humidity38%
Visibility—
Dew point62°
Fri, 14104° / 90°0
104 °
Tempe Cascade, Friday, 14 August
Overcast. High 104°, low 90°.
Pressure29.88 inHg
Wind7.6 mph SW
Humidity24%
Visibility—
Dew point53°
Sat, 15107° / 92°0
107 °
Tempe Cascade, Saturday, 15 August
Partly cloudy. High 107°, low 92°.
Pressure29.91 inHg
Wind12.2 mph W
Humidity20%
Visibility—
Dew point51°
Sun, 16103° / 86°0.09
103 °
Tempe Cascade, Sunday, 16 August
Light rain. High 103°, low 86°.
Pressure29.97 inHg
Wind14.6 mph S
Humidity25%
Visibility—
Dew point54°
Mon, 17101° / 86°0
101 °
Tempe Cascade, Monday, 17 August
Overcast. High 101°, low 86°.
Pressure29.97 inHg
Wind3.8 mph S
Humidity33%
Visibility—
Dew point59°
Tue, 18107° / 91°0.01
107 °
Tempe Cascade, Tuesday, 18 August
Light rain. High 107°, low 91°.
Pressure29.88 inHg
Wind7 mph NE
Humidity24%
Visibility—
Dew point56°
Wed, 19108° / 95°0.02
108 °
Tempe Cascade, Wednesday, 19 August
Light rain. High 108°, low 95°.
Pressure29.83 inHg
Wind9.1 mph S
Humidity24%
Visibility—
Dew point58°
Thu, 20105° / 91°0.01
105 °
Tempe Cascade, Thursday, 20 August
Light rain. High 105°, low 91°.
Pressure29.85 inHg
Wind12.9 mph W
Humidity26%
Visibility—
Dew point57°
Fri, 21107° / 91°0.03
107 °
Tempe Cascade, Friday, 21 August
Light rain. High 107°, low 91°.
Pressure29.83 inHg
Wind9.9 mph NW
Humidity27%
Visibility—
Dew point58°
Sat, 22107° / 91°0.01
107 °
Tempe Cascade, Saturday, 22 August
Light rain. High 107°, low 91°.
Pressure29.80 inHg
Wind21 mph SE
Humidity26%
Visibility—
Dew point58°
Sun, 23105° / 90°0.02
105 °
Tempe Cascade, Sunday, 23 August
Light rain. High 105°, low 90°.
Pressure29.85 inHg
Wind9.8 mph SE
Humidity32%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 24102° / 79°0.02
102 °
Tempe Cascade, Monday, 24 August
Climate normal for this date — 60-year average.
Average high102°
Average low79°
Average precipitation0.02 in
Chance of precipitation13%
Record high113° (2020)
Record low67° (1992)
Tue, 25101° / 79°0.04
101 °
Tempe Cascade, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high101°
Average low79°
Average precipitation0.04 in
Chance of precipitation25%
Record high112° (2011)
Record low67° (1990)
Wed, 26102° / 79°0.03
102 °
Tempe Cascade, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high102°
Average low79°
Average precipitation0.03 in
Chance of precipitation17%
Record high112° (2001)
Record low69° (1992)
Thu, 27102° / 79°0.03
102 °
Tempe Cascade, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high102°
Average low79°
Average precipitation0.03 in
Chance of precipitation15%
Record high111° (2020)
Record low69° (1992)
Fri, 28103° / 79°0.02
103 °
Tempe Cascade, Friday, 28 August
Climate normal for this date — 60-year average.
Average high103°
Average low79°
Average precipitation0.02 in
Chance of precipitation7%
Record high113° (2023)
Record low69° (1992)
Sat, 29103° / 79°0.04
103 °
Tempe Cascade, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high103°
Average low79°
Average precipitation0.04 in
Chance of precipitation12%
Record high113° (2023)
Record low70° (1960)
Sun, 30103° / 80°0.03
103 °
Tempe Cascade, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high103°
Average low80°
Average precipitation0.03 in
Chance of precipitation13%
Record high111° (2011)
Record low68° (1992)
Mon, 31102° / 80°0.02
102 °
Tempe Cascade, Monday, 31 August
Climate normal for this date — 60-year average.
Average high102°
Average low80°
Average precipitation0.02 in
Chance of precipitation12%
Record high111° (2011)
Record low68° (1962)
Tue, 01101° / 79°0.03
101 °
Tempe Cascade, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high101°
Average low79°
Average precipitation0.03 in
Chance of precipitation10%
Record high110° (1982)
Record low64° (1992)
Wed, 02101° / 79°0.06
101 °
Tempe Cascade, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high101°
Average low79°
Average precipitation0.06 in
Chance of precipitation15%
Record high110° (1982)
Record low64° (1992)
Thu, 03102° / 79°0.01
102 °
Tempe Cascade, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high102°
Average low79°
Average precipitation0.01 in
Chance of precipitation8%
Record high109° (1983)
Record low66° (1992)
Fri, 04101° / 78°0.06
101 °
Tempe Cascade, Friday, 4 September
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.06 in
Chance of precipitation12%
Record high112° (2020)
Record low62° (1961)
Sat, 05101° / 78°0.09
101 °
Tempe Cascade, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.09 in
Chance of precipitation15%
Record high114° (2020)
Record low63° (1992)
Sun, 06101° / 78°0.04
101 °
Tempe Cascade, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.04 in
Chance of precipitation10%
Record high112° (2020)
Record low61° (1970)
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 Tempe Cascade, 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 Tempe Cascade, 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.