Monthly outlook for St. Michaels, AZ: average high 86.5°, average low 66.6°. That is 3.4° above the climate normal for August. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 7 days and 1.3 inches. The warmest day looks like 9 August (92.8°), the coolest 13 August (61.6°).
86.5°/66.6°
Average high / low
+3.4°
Above normal
6 / 7
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.2°
80.9°
+1.8°
19 August – 28 August
90.3°
79.4°
+6°
29 August – 7 September
at normal
78.8°
—
August records over 66 years
93.4°7 August 2025All-time high
45°23 August 1968All-time low
Mon, 1090° / 66°0.02
90 °
St. Michaels, Monday, 10 August
Light rain. High 90°, low 66°.
Pressure29.94 inHg
Wind10.3 mph NW
Humidity21%
Visibility6.2 mi
Dew point41°
Tue, 1189° / 65°0.06
89 °
St. Michaels, Tuesday, 11 August
Light rain. High 89°, low 65°.
Pressure29.94 inHg
Wind12.1 mph NW
Humidity24%
Visibility6.2 mi
Dew point44°
Wed, 1283° / 65°0.01
83 °
St. Michaels, Wednesday, 12 August
Light rain. High 83°, low 65°.
Pressure29.88 inHg
Wind8.4 mph W
Humidity31%
Visibility6.2 mi
Dew point47°
Thu, 1378° / 62°0.29
78 °
St. Michaels, Thursday, 13 August
Rain. High 78°, low 62°.
Pressure29.91 inHg
Wind14.2 mph W
Humidity50%
Visibility—
Dew point51°
Fri, 1477° / 63°0.16
77 °
St. Michaels, Friday, 14 August
Light rain. High 77°, low 63°.
Pressure30.00 inHg
Wind11.3 mph W
Humidity38%
Visibility—
Dew point46°
Sat, 1583° / 62°0.59
83 °
St. Michaels, Saturday, 15 August
Rain. High 83°, low 62°.
Pressure30.09 inHg
Wind22.2 mph SW
Humidity37%
Visibility—
Dew point48°
Sun, 1683° / 62°0
83 °
St. Michaels, Sunday, 16 August
Partly cloudy. High 83°, low 62°.
Pressure30.15 inHg
Wind18.6 mph S
Humidity37%
Visibility—
Dew point47°
Mon, 1782° / 67°0.01
82 °
St. Michaels, Monday, 17 August
Light rain. High 82°, low 67°.
Pressure30.12 inHg
Wind5.3 mph SW
Humidity33%
Visibility—
Dew point47°
Tue, 1886° / 68°0.02
86 °
St. Michaels, Tuesday, 18 August
Light rain. High 86°, low 68°.
Pressure30.06 inHg
Wind12.2 mph N
Humidity26%
Visibility—
Dew point43°
Wed, 1989° / 71°0
89 °
St. Michaels, Wednesday, 19 August
Light rain. High 89°, low 71°.
Pressure30.00 inHg
Wind11 mph E
Humidity22%
Visibility—
Dew point41°
Thu, 2089° / 69°0
89 °
St. Michaels, Thursday, 20 August
Light rain. High 89°, low 69°.
Pressure30.00 inHg
Wind9.5 mph S
Humidity26%
Visibility—
Dew point45°
Fri, 2191° / 69°0.21
91 °
St. Michaels, Friday, 21 August
Rain. High 91°, low 69°.
Pressure29.94 inHg
Wind11.6 mph W
Humidity25%
Visibility—
Dew point44°
Sat, 2292° / 69°0
92 °
St. Michaels, Saturday, 22 August
Clear. High 92°, low 69°.
Pressure30.00 inHg
Wind9.5 mph NW
Humidity24%
Visibility—
Dew point44°
Sun, 2390° / 67°0.02
90 °
St. Michaels, Sunday, 23 August
Light rain. High 90°, low 67°.
Pressure30.12 inHg
Wind7.2 mph SE
Humidity27%
Visibility—
Dew point44°
Mon, 2490° / 71°0.05
90 °
St. Michaels, Monday, 24 August
Light rain. High 90°, low 71°.
Pressure30.03 inHg
Wind16.3 mph W
Humidity25%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 58°0.1
79 °
St. Michaels, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.1 in
Chance of precipitation43%
Record high88° (2002)
Record low50° (1992)
Wed, 2679° / 59°0.09
79 °
St. Michaels, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low59°
Average precipitation0.09 in
Chance of precipitation45%
Record high89° (2019)
Record low52° (1987)
Thu, 2779° / 59°0.08
79 °
St. Michaels, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low59°
Average precipitation0.08 in
Chance of precipitation40%
Record high89° (2019)
Record low51° (1987)
Fri, 2880° / 58°0.07
80 °
St. Michaels, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low58°
Average precipitation0.07 in
Chance of precipitation28%
Record high88° (2011)
Record low51° (2016)
Sat, 2980° / 59°0.07
80 °
St. Michaels, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low59°
Average precipitation0.07 in
Chance of precipitation32%
Record high88° (2011)
Record low51° (1988)
Sun, 3080° / 59°0.07
80 °
St. Michaels, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low59°
Average precipitation0.07 in
Chance of precipitation30%
Record high89° (2011)
Record low49° (1992)
Mon, 3179° / 58°0.05
79 °
St. Michaels, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.05 in
Chance of precipitation32%
Record high88° (2019)
Record low50° (1980)
Tue, 0179° / 58°0.04
79 °
St. Michaels, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.04 in
Chance of precipitation28%
Record high87° (2019)
Record low49° (1992)
Wed, 0279° / 58°0.05
79 °
St. Michaels, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.05 in
Chance of precipitation25%
Record high87° (1995)
Record low49° (1973)
Thu, 0379° / 58°0.05
79 °
St. Michaels, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low58°
Average precipitation0.05 in
Chance of precipitation28%
Record high88° (1995)
Record low39° (1961)
Fri, 0478° / 58°0.07
78 °
St. Michaels, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low58°
Average precipitation0.07 in
Chance of precipitation33%
Record high90° (2020)
Record low38° (1961)
Sat, 0578° / 57°0.07
78 °
St. Michaels, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low57°
Average precipitation0.07 in
Chance of precipitation35%
Record high91° (2022)
Record low44° (2004)
Sun, 0678° / 57°0.1
78 °
St. Michaels, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low57°
Average precipitation0.1 in
Chance of precipitation42%
Record high92° (2020)
Record low44° (1970)
Mon, 0778° / 57°0.04
78 °
St. Michaels, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low57°
Average precipitation0.04 in
Chance of precipitation27%
Record high90° (2020)
Record low45° (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 St. Michaels, 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 St. Michaels, 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.