Monthly outlook for Greenfield Park, AZ: average high 102.9°, average low 86.4°. That is 1° above the climate normal for August. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 9 August (112.3°), the coolest 19 August (78.5°).
102.9°/86.4°
Average high / low
+1°
Above normal
4 / 3
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
103.2°
101.4°
+1°
19 August – 28 August
102.5°
101.1°
+0.8°
29 August – 7 September
at normal
100.6°
—
August records over 66 years
115.2°7 August 2025All-time high
63.9°21 August 1979All-time low
Climate normals and records are computed from the nearest reference point — Mesa (2 mi).
Mon, 10110° / 86°0.02
110 °
Greenfield Park, Monday, 10 August
Light rain. High 110°, low 86°.
Pressure29.83 inHg
Wind9.6 mph W
Humidity25%
Visibility6.2 mi
Dew point59°
Tue, 11103° / 83°0.01
103 °
Greenfield Park, Tuesday, 11 August
Light rain. High 103°, low 83°.
Pressure29.88 inHg
Wind6.6 mph W
Humidity31%
Visibility6.2 mi
Dew point61°
Wed, 1295° / 87°0.14
95 °
Greenfield Park, Wednesday, 12 August
Light rain. High 95°, low 87°.
Pressure29.83 inHg
Wind7.1 mph W
Humidity35%
Visibility6.2 mi
Dew point61°
Thu, 1398° / 81°0.18
98 °
Greenfield Park, Thursday, 13 August
Light rain. High 98°, low 81°.
Pressure29.85 inHg
Wind9.5 mph SE
Humidity37%
Visibility—
Dew point59°
Fri, 14100° / 88°0
100 °
Greenfield Park, Friday, 14 August
Overcast. High 100°, low 88°.
Pressure29.88 inHg
Wind7.9 mph S
Humidity25%
Visibility—
Dew point53°
Sat, 15104° / 89°0
104 °
Greenfield Park, Saturday, 15 August
Partly cloudy. High 104°, low 89°.
Pressure29.91 inHg
Wind14.5 mph W
Humidity20%
Visibility—
Dew point49°
Sun, 16103° / 88°0
103 °
Greenfield Park, Sunday, 16 August
Clear. High 103°, low 88°.
Pressure30.00 inHg
Wind11.4 mph NW
Humidity19%
Visibility—
Dew point47°
Mon, 17104° / 91°0
104 °
Greenfield Park, Monday, 17 August
Light rain. High 104°, low 91°.
Pressure29.91 inHg
Wind14.5 mph SE
Humidity23%
Visibility—
Dew point53°
Tue, 18104° / 89°0.01
104 °
Greenfield Park, Tuesday, 18 August
Light rain. High 104°, low 89°.
Pressure29.83 inHg
Wind10.6 mph E
Humidity27%
Visibility—
Dew point57°
Wed, 19103° / 79°0.46
103 °
Greenfield Park, Wednesday, 19 August
Rain. High 103°, low 79°.
Pressure29.85 inHg
Wind26.7 mph SW
Humidity30%
Visibility—
Dew point60°
Thu, 20101° / 82°0.17
101 °
Greenfield Park, Thursday, 20 August
Light rain. High 101°, low 82°.
Pressure29.91 inHg
Wind8.9 mph E
Humidity37%
Visibility—
Dew point62°
Fri, 21101° / 82°0
101 °
Greenfield Park, Friday, 21 August
Partly cloudy. High 101°, low 82°.
Pressure29.88 inHg
Wind8.2 mph W
Humidity33%
Visibility—
Dew point58°
Sat, 22104° / 87°0
104 °
Greenfield Park, Saturday, 22 August
Clear. High 104°, low 87°.
Pressure29.85 inHg
Wind7.4 mph W
Humidity27%
Visibility—
Dew point56°
Sun, 23106° / 92°0
106 °
Greenfield Park, Sunday, 23 August
Partly cloudy. High 106°, low 92°.
Pressure29.83 inHg
Wind12.2 mph W
Humidity18%
Visibility—
Dew point49°
Mon, 24101° / 90°0
101 °
Greenfield Park, Monday, 24 August
Overcast. High 101°, low 90°.
Pressure29.83 inHg
Wind9.9 mph SE
Humidity27%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 25101° / 78°0.02
101 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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 °
Greenfield Park, 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)
Mon, 07100° / 77°0.02
100 °
Greenfield Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high100°
Average low77°
Average precipitation0.02 in
Chance of precipitation15%
Record high110° (1979)
Record low66° (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 Greenfield 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 Greenfield 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.