Monthly outlook for San Xavier, AZ: average high 92.9°, average low 73.5°. That is 0.9° below the climate normal for August. Precipitation is expected on 7 days (about 1.6 inches), against a normal of 6 days and 1.3 inches. The warmest day looks like 9 August (103.6°), the coolest 20 August (67.1°).
92.9°/73.5°
Average high / low
−0.9°
Below normal
7 / 6
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
93.1°
94.6°
-0.8°
19 August – 28 August
92.5°
94.5°
-1.1°
29 August – 7 September
at normal
93.8°
—
August records over 66 years
111°6 August 2025All-time high
59.5°20 August 1979All-time low
Climate normals and records are computed from the nearest reference point — Three Points (13 mi).
Mon, 10100° / 71°0.06
100 °
San Xavier, Monday, 10 August
Rain. High 100°, low 71°.
Pressure29.91 inHg
Wind5.2 mph NW
Humidity32%
Visibility6.2 mi
Dew point58°
Tue, 1193° / 71°0.04
93 °
San Xavier, Tuesday, 11 August
Light rain. High 93°, low 71°.
Pressure29.91 inHg
Wind10.4 mph NW
Humidity28%
Visibility6.2 mi
Dew point54°
Wed, 1281° / 73°0.38
81 °
San Xavier, Wednesday, 12 August
Rain. High 81°, low 73°.
Pressure29.91 inHg
Wind4 mph W
Humidity57%
Visibility6.2 mi
Dew point62°
Thu, 1388° / 69°0.21
88 °
San Xavier, Thursday, 13 August
Rain. High 88°, low 69°.
Pressure29.88 inHg
Wind13.7 mph SW
Humidity47%
Visibility—
Dew point58°
Fri, 1493° / 74°0
93 °
San Xavier, Friday, 14 August
Overcast. High 93°, low 74°.
Pressure29.94 inHg
Wind12.9 mph W
Humidity35%
Visibility—
Dew point54°
Sat, 1594° / 76°0
94 °
San Xavier, Saturday, 15 August
Overcast. High 94°, low 76°.
Pressure29.97 inHg
Wind11.4 mph SW
Humidity27%
Visibility—
Dew point49°
Sun, 1692° / 77°0.01
92 °
San Xavier, Sunday, 16 August
Light rain. High 92°, low 77°.
Pressure30.03 inHg
Wind8.8 mph S
Humidity31%
Visibility—
Dew point52°
Mon, 1794° / 76°0.03
94 °
San Xavier, Monday, 17 August
Light rain. High 94°, low 76°.
Pressure29.97 inHg
Wind15.8 mph S
Humidity30%
Visibility—
Dew point53°
Tue, 1893° / 75°0.04
93 °
San Xavier, Tuesday, 18 August
Light rain. High 93°, low 75°.
Pressure29.91 inHg
Wind8.9 mph W
Humidity36%
Visibility—
Dew point54°
Wed, 1994° / 76°0.03
94 °
San Xavier, Wednesday, 19 August
Light rain. High 94°, low 76°.
Pressure29.91 inHg
Wind19.4 mph SW
Humidity35%
Visibility—
Dew point56°
Thu, 2094° / 67°0.63
94 °
San Xavier, Thursday, 20 August
Rain. High 94°, low 67°.
Pressure29.94 inHg
Wind16.4 mph NW
Humidity36%
Visibility—
Dew point56°
Fri, 2192° / 71°0.05
92 °
San Xavier, Friday, 21 August
Light rain. High 92°, low 71°.
Pressure29.91 inHg
Wind11.9 mph E
Humidity40%
Visibility—
Dew point57°
Sat, 2294° / 72°0
94 °
San Xavier, Saturday, 22 August
Partly cloudy. High 94°, low 72°.
Pressure29.91 inHg
Wind8.7 mph NW
Humidity32%
Visibility—
Dew point53°
Sun, 2394° / 76°0.07
94 °
San Xavier, Sunday, 23 August
Light rain. High 94°, low 76°.
Pressure29.88 inHg
Wind20.9 mph S
Humidity28%
Visibility—
Dew point51°
Mon, 2488° / 76°0.02
88 °
San Xavier, Monday, 24 August
Light rain. High 88°, low 76°.
Pressure29.94 inHg
Wind6.8 mph NE
Humidity48%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2594° / 74°0.07
94 °
San Xavier, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high94°
Average low74°
Average precipitation0.07 in
Chance of precipitation35%
Record high105° (2011)
Record low64° (1960)
Wed, 2695° / 74°0.05
95 °
San Xavier, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.05 in
Chance of precipitation30%
Record high105° (2011)
Record low66° (1960)
Thu, 2795° / 74°0.07
95 °
San Xavier, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.07 in
Chance of precipitation28%
Record high105° (2011)
Record low65° (1987)
Fri, 2895° / 74°0.04
95 °
San Xavier, Friday, 28 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.04 in
Chance of precipitation23%
Record high106° (2023)
Record low67° (1987)
Sat, 2995° / 74°0.07
95 °
San Xavier, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.07 in
Chance of precipitation32%
Record high107° (2023)
Record low66° (1960)
Sun, 3095° / 74°0.05
95 °
San Xavier, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.05 in
Chance of precipitation32%
Record high105° (2023)
Record low62° (1992)
Mon, 3195° / 74°0.04
95 °
San Xavier, Monday, 31 August
Climate normal for this date — 60-year average.
Average high95°
Average low74°
Average precipitation0.04 in
Chance of precipitation20%
Record high105° (2011)
Record low64° (2000)
Tue, 0194° / 73°0.08
94 °
San Xavier, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high94°
Average low73°
Average precipitation0.08 in
Chance of precipitation35%
Record high103° (2011)
Record low62° (2000)
Wed, 0293° / 73°0.06
93 °
San Xavier, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high93°
Average low73°
Average precipitation0.06 in
Chance of precipitation32%
Record high102° (1982)
Record low64° (2000)
Thu, 0394° / 73°0.04
94 °
San Xavier, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high94°
Average low73°
Average precipitation0.04 in
Chance of precipitation22%
Record high102° (1983)
Record low65° (1992)
Fri, 0493° / 73°0.08
93 °
San Xavier, Friday, 4 September
Climate normal for this date — 60-year average.
Average high93°
Average low73°
Average precipitation0.08 in
Chance of precipitation28%
Record high106° (2020)
Record low60° (1961)
Sat, 0593° / 72°0.05
93 °
San Xavier, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high93°
Average low72°
Average precipitation0.05 in
Chance of precipitation35%
Record high106° (2024)
Record low62° (1985)
Sun, 0693° / 72°0.06
93 °
San Xavier, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high93°
Average low72°
Average precipitation0.06 in
Chance of precipitation25%
Record high104° (2023)
Record low63° (1985)
Mon, 0793° / 72°0.08
93 °
San Xavier, Monday, 7 September
Climate normal for this date — 60-year average.
Average high93°
Average low72°
Average precipitation0.08 in
Chance of precipitation20%
Record high103° (1979)
Record low60° (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 San Xavier, 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 San Xavier, 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.