Monthly outlook for Mesa, AZ: average high 104.7°, average low 87.2°. That is 1.9° above the climate normal for August. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 9 August (112.9°), the coolest 13 August (80.7°).
104.7°/87.2°
Average high / low
+1.9°
Above normal
3 / 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
104.1°
101.6°
+1.4°
18 August – 27 August
105.6°
100.9°
+2.6°
28 August – 6 September
at normal
100.8°
—
August records over 66 years
115.2°7 August 2025All-time high
63.9°21 August 1979All-time low
Sun, 09113° / 89°0
113 °
Mesa, Sunday, 9 August
Clear. High 113°, low 89°.
Pressure29.80 inHg
Wind5.9 mph NW
Humidity21%
Visibility6.2 mi
Dew point55°
Mon, 10106° / 83°0.03
106 °
Mesa, Monday, 10 August
Light rain. High 106°, low 83°.
Pressure29.83 inHg
Wind7 mph W
Humidity28%
Visibility6.2 mi
Dew point61°
Tue, 11103° / 83°0.03
103 °
Mesa, Tuesday, 11 August
Light rain. High 103°, low 83°.
Pressure29.88 inHg
Wind6.3 mph W
Humidity34%
Visibility6.2 mi
Dew point63°
Wed, 12101° / 84°0.21
101 °
Mesa, Wednesday, 12 August
Light rain. High 101°, low 84°.
Pressure29.83 inHg
Wind8.5 mph NW
Humidity36%
Visibility6.2 mi
Dew point64°
Thu, 13100° / 81°0.13
100 °
Mesa, Thursday, 13 August
Light rain. High 100°, low 81°.
Pressure29.83 inHg
Wind7 mph S
Humidity39%
Visibility—
Dew point62°
Fri, 14103° / 88°0
103 °
Mesa, Friday, 14 August
Overcast. High 103°, low 88°.
Pressure29.88 inHg
Wind6 mph SW
Humidity23%
Visibility—
Dew point52°
Sat, 15106° / 91°0
106 °
Mesa, Saturday, 15 August
Partly cloudy. High 106°, low 91°.
Pressure29.91 inHg
Wind8.6 mph W
Humidity21%
Visibility—
Dew point52°
Sun, 16101° / 86°0.05
101 °
Mesa, Sunday, 16 August
Light rain. High 101°, low 86°.
Pressure29.97 inHg
Wind13.7 mph S
Humidity25%
Visibility—
Dew point53°
Mon, 17101° / 84°0
101 °
Mesa, Monday, 17 August
Overcast. High 101°, low 84°.
Pressure29.97 inHg
Wind4.6 mph SW
Humidity32%
Visibility—
Dew point58°
Tue, 18106° / 88°0.02
106 °
Mesa, Tuesday, 18 August
Light rain. High 106°, low 88°.
Pressure29.88 inHg
Wind6.9 mph NE
Humidity24%
Visibility—
Dew point56°
Wed, 19107° / 93°0.01
107 °
Mesa, Wednesday, 19 August
Light rain. High 107°, low 93°.
Pressure29.85 inHg
Wind14.4 mph S
Humidity25%
Visibility—
Dew point58°
Thu, 20105° / 89°0.02
105 °
Mesa, Thursday, 20 August
Light rain. High 105°, low 89°.
Pressure29.85 inHg
Wind15 mph W
Humidity28%
Visibility—
Dew point58°
Fri, 21105° / 89°0.02
105 °
Mesa, Friday, 21 August
Light rain. High 105°, low 89°.
Pressure29.83 inHg
Wind6.4 mph NE
Humidity27%
Visibility—
Dew point57°
Sat, 22106° / 89°0
106 °
Mesa, Saturday, 22 August
Partly cloudy. High 106°, low 89°.
Pressure29.80 inHg
Wind15.2 mph SE
Humidity27%
Visibility—
Dew point59°
Sun, 23104° / 89°0.01
104 °
Mesa, Sunday, 23 August
Light rain. High 104°, low 89°.
Pressure29.85 inHg
Wind8.9 mph SE
Humidity33%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 24101° / 78°0.02
101 °
Mesa, Monday, 24 August
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.02 in
Chance of precipitation13%
Record high113° (2020)
Record low67° (1992)
Tue, 25101° / 78°0.02
101 °
Mesa, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.02 in
Chance of precipitation22%
Record high111° (2011)
Record low67° (1992)
Wed, 26101° / 78°0.03
101 °
Mesa, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.03 in
Chance of precipitation12%
Record high111° (2001)
Record low68° (1992)
Thu, 27101° / 79°0.02
101 °
Mesa, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high101°
Average low79°
Average precipitation0.02 in
Chance of precipitation18%
Record high110° (2011)
Record low68° (1992)
Fri, 28102° / 78°0.02
102 °
Mesa, Friday, 28 August
Climate normal for this date — 60-year average.
Average high102°
Average low78°
Average precipitation0.02 in
Chance of precipitation8%
Record high112° (1998)
Record low70° (1992)
Sat, 29102° / 78°0.03
102 °
Mesa, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high102°
Average low78°
Average precipitation0.03 in
Chance of precipitation10%
Record high112° (2023)
Record low68° (1960)
Sun, 30102° / 79°0.02
102 °
Mesa, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high102°
Average low79°
Average precipitation0.02 in
Chance of precipitation15%
Record high110° (2011)
Record low67° (1992)
Mon, 31101° / 79°0.03
101 °
Mesa, Monday, 31 August
Climate normal for this date — 60-year average.
Average high101°
Average low79°
Average precipitation0.03 in
Chance of precipitation18%
Record high110° (2011)
Record low68° (1962)
Tue, 01100° / 78°0.04
100 °
Mesa, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.04 in
Chance of precipitation18%
Record high109° (1982)
Record low65° (1992)
Wed, 02100° / 78°0.05
100 °
Mesa, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.05 in
Chance of precipitation15%
Record high109° (1982)
Record low64° (1992)
Thu, 03101° / 78°0
101 °
Mesa, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0 in
Chance of precipitation5%
Record high109° (1983)
Record low66° (1973)
Fri, 04100° / 77°0.06
100 °
Mesa, Friday, 4 September
Climate normal for this date — 60-year average.
Average high100°
Average low77°
Average precipitation0.06 in
Chance of precipitation10%
Record high111° (2020)
Record low60° (1961)
Sat, 05100° / 77°0.07
100 °
Mesa, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high100°
Average low77°
Average precipitation0.07 in
Chance of precipitation15%
Record high112° (2024)
Record low62° (1992)
Sun, 06100° / 77°0.05
100 °
Mesa, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high100°
Average low77°
Average precipitation0.05 in
Chance of precipitation10%
Record high109° (2020)
Record low62° (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 Mesa, 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 Mesa, 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.