Monthly outlook for Castle Hot Springs, AZ: average high 100.9°, average low 83.5°. That is 0.6° above the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 2 days and 0.7 inches. The warmest day looks like 9 August (114.9°), the coolest 13 August (73.3°).
100.9°/83.5°
Average high / low
+0.6°
Above normal
6 / 2
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
98°
100.1°
-1.2°
19 August – 28 August
105.7°
99.6°
+3.4°
29 August – 7 September
at normal
99.1°
—
August records over 66 years
114.6°7 August 2025All-time high
62.6°23 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Peoria (14 mi).
Mon, 10107° / 85°0.09
107 °
Castle Hot Springs, Monday, 10 August
Light rain. High 107°, low 85°.
Pressure29.85 inHg
Wind9.6 mph SW
Humidity28%
Visibility6.2 mi
Dew point59°
Tue, 1199° / 81°0.05
99 °
Castle Hot Springs, Tuesday, 11 August
Light rain. High 99°, low 81°.
Pressure29.91 inHg
Wind11.1 mph W
Humidity31%
Visibility6.2 mi
Dew point60°
Wed, 1293° / 78°0.25
93 °
Castle Hot Springs, Wednesday, 12 August
Rain. High 93°, low 78°.
Pressure29.85 inHg
Wind8.8 mph SW
Humidity35%
Visibility6.2 mi
Dew point57°
Thu, 1387° / 73°0.98
87 °
Castle Hot Springs, Thursday, 13 August
Heavy rain. High 87°, low 73°.
Pressure29.88 inHg
Wind7.6 mph NE
Humidity57%
Visibility—
Dew point63°
Fri, 1488° / 79°0.07
88 °
Castle Hot Springs, Friday, 14 August
Light rain. High 88°, low 79°.
Pressure29.94 inHg
Wind8.4 mph SE
Humidity42%
Visibility—
Dew point59°
Sat, 1593° / 82°0
93 °
Castle Hot Springs, Saturday, 15 August
Overcast. High 93°, low 82°.
Pressure29.97 inHg
Wind6 mph SW
Humidity32%
Visibility—
Dew point55°
Sun, 1696° / 82°0.01
96 °
Castle Hot Springs, Sunday, 16 August
Light rain. High 96°, low 82°.
Pressure30.03 inHg
Wind8.1 mph W
Humidity33%
Visibility—
Dew point56°
Mon, 1799° / 84°0
99 °
Castle Hot Springs, Monday, 17 August
Light rain. High 99°, low 84°.
Pressure29.97 inHg
Wind16.8 mph NE
Humidity30%
Visibility—
Dew point55°
Tue, 18102° / 84°0
102 °
Castle Hot Springs, Tuesday, 18 August
Light rain. High 102°, low 84°.
Pressure29.94 inHg
Wind10.1 mph SW
Humidity30%
Visibility—
Dew point56°
Wed, 19107° / 88°0.02
107 °
Castle Hot Springs, Wednesday, 19 August
Light rain. High 107°, low 88°.
Pressure29.88 inHg
Wind16.7 mph N
Humidity24%
Visibility—
Dew point55°
Thu, 20103° / 85°0
103 °
Castle Hot Springs, Thursday, 20 August
Partly cloudy. High 103°, low 85°.
Pressure29.88 inHg
Wind9.8 mph S
Humidity31%
Visibility—
Dew point58°
Fri, 21106° / 88°0
106 °
Castle Hot Springs, Friday, 21 August
Partly cloudy. High 106°, low 88°.
Pressure29.83 inHg
Wind12.6 mph W
Humidity23%
Visibility—
Dew point54°
Sat, 22105° / 87°0
105 °
Castle Hot Springs, Saturday, 22 August
Overcast. High 105°, low 87°.
Pressure29.85 inHg
Wind11.5 mph S
Humidity24%
Visibility—
Dew point54°
Sun, 23107° / 90°0
107 °
Castle Hot Springs, Sunday, 23 August
Mostly clear. High 107°, low 90°.
Pressure29.91 inHg
Wind11.4 mph SW
Humidity20%
Visibility—
Dew point53°
Mon, 24105° / 86°0.09
105 °
Castle Hot Springs, Monday, 24 August
Light rain. High 105°, low 86°.
Pressure29.88 inHg
Wind27.7 mph NE
Humidity22%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2599° / 78°0.02
99 °
Castle Hot Springs, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high99°
Average low78°
Average precipitation0.02 in
Chance of precipitation13%
Record high109° (2011)
Record low68° (1990)
Wed, 26100° / 78°0.02
100 °
Castle Hot Springs, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.02 in
Chance of precipitation17%
Record high110° (2001)
Record low69° (1960)
Thu, 27100° / 78°0.06
100 °
Castle Hot Springs, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.06 in
Chance of precipitation13%
Record high110° (2011)
Record low68° (1972)
Fri, 28101° / 78°0.02
101 °
Castle Hot Springs, Friday, 28 August
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.02 in
Chance of precipitation10%
Record high111° (2023)
Record low69° (1960)
Sat, 29101° / 78°0.02
101 °
Castle Hot Springs, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high101°
Average low78°
Average precipitation0.02 in
Chance of precipitation8%
Record high111° (2023)
Record low70° (1993)
Sun, 30100° / 78°0.02
100 °
Castle Hot Springs, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.02 in
Chance of precipitation13%
Record high110° (2022)
Record low69° (2010)
Mon, 31100° / 78°0.02
100 °
Castle Hot Springs, Monday, 31 August
Climate normal for this date — 60-year average.
Average high100°
Average low78°
Average precipitation0.02 in
Chance of precipitation12%
Record high108° (2011)
Record low68° (1962)
Tue, 0199° / 78°0.03
99 °
Castle Hot Springs, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high99°
Average low78°
Average precipitation0.03 in
Chance of precipitation15%
Record high108° (1982)
Record low67° (1992)
Wed, 0299° / 77°0.05
99 °
Castle Hot Springs, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high99°
Average low77°
Average precipitation0.05 in
Chance of precipitation13%
Record high108° (1982)
Record low65° (1992)
Thu, 03100° / 77°0.01
100 °
Castle Hot Springs, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high100°
Average low77°
Average precipitation0.01 in
Chance of precipitation7%
Record high108° (2022)
Record low66° (1961)
Fri, 0499° / 77°0.05
99 °
Castle Hot Springs, Friday, 4 September
Climate normal for this date — 60-year average.
Average high99°
Average low77°
Average precipitation0.05 in
Chance of precipitation17%
Record high110° (2020)
Record low65° (1961)
Sat, 0598° / 77°0.09
98 °
Castle Hot Springs, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high98°
Average low77°
Average precipitation0.09 in
Chance of precipitation15%
Record high111° (2020)
Record low63° (1992)
Sun, 0698° / 77°0.02
98 °
Castle Hot Springs, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high98°
Average low77°
Average precipitation0.02 in
Chance of precipitation10%
Record high110° (2020)
Record low64° (1970)
Mon, 0798° / 76°0.02
98 °
Castle Hot Springs, Monday, 7 September
Climate normal for this date — 60-year average.
Average high98°
Average low76°
Average precipitation0.02 in
Chance of precipitation13%
Record high107° (2020)
Record low64° (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 Castle Hot Springs, 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 Castle Hot Springs, 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.