Record envelope, standing records and threshold days for South Phoenix (USC00028112), Arizona, United States, with 47 years of record.
Key Facts for South Phoenix
South Phoenix (USC00028112) is a weather station in Arizona, United States at 33.38 latitude and -112.07 longitude, 352 m (1,155 ft) above sea level.
The station reports from 1961 to 2007, 47 years of record.
1,464 records set at South Phoenix still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
South Phoenix set a daily record high minimum temperature of 18.9 C (66.0 F) on 30 April 2007.
About the Station
Location: Arizona, United States, 33.38 latitude, -112.07 longitude.
Elevation: 352 m (1,155 ft).
Period of record: 1961 to 2007, 47 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at South Phoenix. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at South Phoenix, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.6 C (87.1 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
32.2 C (90.0 F)
-6.1 C (21.0 F)
n/a
n/a
Mar
36.7 C (98.1 F)
-4.4 C (24.1 F)
n/a
n/a
Apr
38.3 C (100.9 F)
1.7 C (35.1 F)
n/a
n/a
May
43.3 C (109.9 F)
2.2 C (36.0 F)
n/a
n/a
Jun
45.6 C (114.1 F)
8.9 C (48.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
14.4 C (57.9 F)
n/a
n/a
Aug
45.0 C (113.0 F)
11.7 C (53.1 F)
n/a
n/a
Sep
42.8 C (109.0 F)
7.2 C (45.0 F)
n/a
n/a
Oct
41.1 C (106.0 F)
-1.7 C (28.9 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-2.8 C (27.0 F)
n/a
n/a
Dec
28.3 C (82.9 F)
-6.7 C (19.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at South Phoenix still stand. 1964 holds the most, with 72.
Standing records at South Phoenix by the year they were set
Year set
Standing records
1961
32
1962
61
1963
35
1964
72
1965
61
1966
37
1967
38
1968
28
1969
28
1970
22
1971
60
1972
44
1973
38
1974
23
1975
30
1976
27
1977
26
1978
34
1979
41
1980
31
1981
14
1982
19
1983
28
1984
27
1985
36
1986
35
1987
26
1988
24
1989
26
1990
29
1991
25
1992
24
1993
19
1994
18
1995
24
1996
39
1997
18
1998
31
1999
44
2000
28
2001
29
2002
13
2003
31
2004
21
2005
19
2006
35
2007
14
All-Time Record Progression
1 new records
1 all-time records were set at South Phoenix between 11 August 2003 and 11 August 2003. Each dot is a new record.
When South Phoenix set new all-time records
Date
Kind
Detail
2003-08-11
Record high minimum temperature
Record high minimum temperature 31.7 C (89.1 F)
Wettest Day of Each Month
Aug: 52.1 mm (2.1 in)
The wettest day on record for each calendar month at South Phoenix. The most was 52.1 mm (2.1 in) on 15 August 1990.
Record daily precipitation for each month at South Phoenix
Month
Record daily precipitation (mm)
Date
Jan
38.9 mm (1.5 in)
11 January 1993
Feb
35.3 mm (1.4 in)
14 February 1978
Mar
42.2 mm (1.7 in)
6 March 2000
Apr
29.2 mm (1.1 in)
2 April 1999
May
21.1 mm (0.8 in)
4 May 1976
Jun
37.3 mm (1.5 in)
23 June 1965
Jul
45.0 mm (1.8 in)
28 July 1984
Aug
52.1 mm (2.1 in)
15 August 1990
Sep
40.1 mm (1.6 in)
29 September 1983
Oct
49.8 mm (2.0 in)
19 October 1972
Nov
52.1 mm (2.1 in)
2 November 1995
Dec
48.3 mm (1.9 in)
15 December 1967
Period of Record Coverage
1961 to 2007
Complete yearUnder 90 percent of days
47 years of record at South Phoenix, 1961 to 2007. 3 years have data for under 90 percent of days and are left out of rankings: 1964, 1998, 2007.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at South Phoenix, 1962 to 2006. Blue stripes are years cooler than the station's own mean of 21.0 C (69.8 F); red stripes are warmer. The coolest year was 1975, at 19.7 C (67.5 F), and the warmest was 1996, at 22.2 C (71.9 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at South Phoenix as warming stripes, 1962 to 2006
Year
Annual mean temperature
Difference from the station mean
1962
20.0 C
-1.01 C
1963
20.1 C
-0.88 C
1966
20.3 C
-0.71 C
1967
19.8 C
-1.20 C
1968
19.8 C
-1.21 C
1969
20.5 C
-0.50 C
1970
20.5 C
-0.45 C
1971
20.1 C
-0.92 C
1973
20.1 C
-0.94 C
1974
20.4 C
-0.62 C
1975
19.7 C
-1.25 C
1977
21.5 C
+0.48 C
1978
20.9 C
-0.06 C
1979
20.4 C
-0.64 C
1980
21.0 C
+0.04 C
1981
21.5 C
+0.46 C
1982
20.4 C
-0.63 C
1983
21.3 C
+0.33 C
1984
21.1 C
+0.15 C
1985
20.6 C
-0.39 C
1986
21.2 C
+0.18 C
1987
20.8 C
-0.16 C
1988
21.2 C
+0.22 C
1989
21.7 C
+0.70 C
1990
21.3 C
+0.28 C
1991
20.9 C
-0.10 C
1992
21.1 C
+0.12 C
1993
21.1 C
+0.15 C
1994
21.2 C
+0.25 C
1995
21.6 C
+0.65 C
1996
22.2 C
+1.17 C
1997
21.8 C
+0.76 C
1998
20.7 C
-0.30 C
1999
21.7 C
+0.72 C
2000
21.5 C
+0.53 C
2001
21.6 C
+0.57 C
2002
21.6 C
+0.56 C
2003
22.0 C
+1.03 C
2004
21.7 C
+0.71 C
2005
21.8 C
+0.85 C
2006
22.0 C
+1.02 C
The annual mean temperature here has risen by 0.5 C (0.4 to 0.5) per decade over 1962 to 2006. In Fahrenheit: 0.8 F (0.6 to 1.0) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at South Phoenix
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.5 C (0.4 to 0.5) per decade
0.8 F (0.6 to 1.0) per decade
1962 to 2006
41
Rise
Mean daily maximum
0.08 C (-0.05 to 0.20) per decade
0.1 F (-0.1 to 0.4) per decade
1962 to 2006
41
Not clearly different from zero
Mean daily minimum
0.8 C (0.7 to 0.9) per decade
1.5 F (1.3 to 1.7) per decade
1962 to 2006
41
Rise
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1961 to 2007
Yearly extremes at South Phoenix: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.6 C (114.1 F)
1990
43.3 C (109.9 F)
47
Coldest night (TNn)
-11.1 C (12.0 F)
1963
-3.3 C (26.1 F)
47
Wettest day (Rx1day)
52.1 mm (2.1 in)
1990
28.4 mm (1.1 in)
47
Wettest five days (Rx5day)
92.8 mm (3.7 in)
1990
42.2 mm (1.7 in)
47
Longest dry spell (CDD)
158 days
1972
91 days
47
Hottest day (TXx)
The hottest day of the year at South Phoenix, 1961 to 2007. The record is 45.6 C (114.1 F) in 1990, marked on the chart; the median year is 43.3 C (109.9 F).
Hottest day (TXx) at South Phoenix by year
Year
Hottest day (TXx)
1961
43.9 C (111.0 F)
1962
43.9 C (111.0 F)
1963
43.9 C (111.0 F)
1964
42.2 C (108.0 F)
1965
41.7 C (107.1 F)
1966
42.8 C (109.0 F)
1967
42.8 C (109.0 F)
1968
43.3 C (109.9 F)
1969
43.3 C (109.9 F)
1970
43.3 C (109.9 F)
1971
43.3 C (109.9 F)
1972
45.0 C (113.0 F)
1973
43.3 C (109.9 F)
1974
43.9 C (111.0 F)
1975
43.3 C (109.9 F)
1976
43.9 C (111.0 F)
1977
42.8 C (109.0 F)
1978
43.3 C (109.9 F)
1979
45.0 C (113.0 F)
1980
43.9 C (111.0 F)
1981
43.3 C (109.9 F)
1982
42.2 C (108.0 F)
1983
44.4 C (111.9 F)
1984
44.4 C (111.9 F)
1985
43.3 C (109.9 F)
1986
42.2 C (108.0 F)
1987
42.8 C (109.0 F)
1988
42.8 C (109.0 F)
1989
43.3 C (109.9 F)
1990
45.6 C (114.1 F)
1991
41.7 C (107.1 F)
1992
42.2 C (108.0 F)
1993
43.3 C (109.9 F)
1994
43.9 C (111.0 F)
1995
45.0 C (113.0 F)
1996
43.9 C (111.0 F)
1997
43.3 C (109.9 F)
1998
44.4 C (111.9 F)
1999
42.8 C (109.0 F)
2000
42.8 C (109.0 F)
2001
43.3 C (109.9 F)
2002
41.7 C (107.1 F)
2003
43.3 C (109.9 F)
2004
41.7 C (107.1 F)
2005
45.0 C (113.0 F)
2006
43.9 C (111.0 F)
2007
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at South Phoenix, 1961 to 2007. The record is -11.1 C (12.0 F) in 1963, marked on the chart; the median year is -3.3 C (26.1 F).
Coldest night (TNn) at South Phoenix by year
Year
Coldest night (TNn)
1961
-3.9 C (25.0 F)
1962
-7.2 C (19.0 F)
1963
-11.1 C (12.0 F)
1964
-8.3 C (17.1 F)
1965
-3.9 C (25.0 F)
1966
-5.6 C (21.9 F)
1967
-6.7 C (19.9 F)
1968
-5.6 C (21.9 F)
1969
-3.9 C (25.0 F)
1970
-5.0 C (23.0 F)
1971
-8.9 C (16.0 F)
1972
-3.9 C (25.0 F)
1973
-1.7 C (28.9 F)
1974
-4.4 C (24.1 F)
1975
-2.8 C (27.0 F)
1976
-6.7 C (19.9 F)
1977
-1.1 C (30.0 F)
1978
-6.7 C (19.9 F)
1979
-4.4 C (24.1 F)
1980
-0.6 C (30.9 F)
1981
-3.3 C (26.1 F)
1982
-1.7 C (28.9 F)
1983
-2.2 C (28.0 F)
1984
-2.8 C (27.0 F)
1985
-4.4 C (24.1 F)
1986
-2.2 C (28.0 F)
1987
-5.0 C (23.0 F)
1988
-5.0 C (23.0 F)
1989
-3.3 C (26.1 F)
1990
-6.1 C (21.0 F)
1991
-1.7 C (28.9 F)
1992
-1.7 C (28.9 F)
1993
-3.3 C (26.1 F)
1994
-2.2 C (28.0 F)
1995
-1.1 C (30.0 F)
1996
-3.9 C (25.0 F)
1997
-3.3 C (26.1 F)
1998
-3.3 C (26.1 F)
1999
-1.1 C (30.0 F)
2000
-1.7 C (28.9 F)
2001
-1.1 C (30.0 F)
2002
-1.7 C (28.9 F)
2003
-3.3 C (26.1 F)
2004
-2.2 C (28.0 F)
2005
-2.2 C (28.0 F)
2006
-1.7 C (28.9 F)
2007
-5.6 C (21.9 F)
Wettest day (Rx1day)
The wettest day of the year at South Phoenix, 1961 to 2007. The record is 52.1 mm (2.1 in) in 1990, marked on the chart; the median year is 28.4 mm (1.1 in).
Wettest day (Rx1day) at South Phoenix by year
Year
Wettest day (Rx1day)
1961
20.1 mm (0.8 in)
1962
21.3 mm (0.8 in)
1963
42.2 mm (1.7 in)
1964
23.4 mm (0.9 in)
1965
37.3 mm (1.5 in)
1966
44.2 mm (1.7 in)
1967
48.3 mm (1.9 in)
1968
29.5 mm (1.2 in)
1969
16.0 mm (0.6 in)
1970
39.6 mm (1.6 in)
1971
25.7 mm (1.0 in)
1972
49.8 mm (2.0 in)
1973
16.5 mm (0.6 in)
1974
28.7 mm (1.1 in)
1975
18.3 mm (0.7 in)
1976
28.4 mm (1.1 in)
1977
14.5 mm (0.6 in)
1978
35.3 mm (1.4 in)
1979
28.2 mm (1.1 in)
1980
17.8 mm (0.7 in)
1981
24.1 mm (0.9 in)
1982
28.7 mm (1.1 in)
1983
40.1 mm (1.6 in)
1984
45.0 mm (1.8 in)
1985
24.9 mm (1.0 in)
1986
17.8 mm (0.7 in)
1987
30.0 mm (1.2 in)
1988
49.0 mm (1.9 in)
1989
36.1 mm (1.4 in)
1990
52.1 mm (2.1 in)
1991
31.5 mm (1.2 in)
1992
29.2 mm (1.1 in)
1993
38.9 mm (1.5 in)
1994
27.9 mm (1.1 in)
1995
52.1 mm (2.1 in)
1996
15.5 mm (0.6 in)
1997
24.1 mm (0.9 in)
1998
27.9 mm (1.1 in)
1999
43.2 mm (1.7 in)
2000
42.2 mm (1.7 in)
2001
22.6 mm (0.9 in)
2002
10.2 mm (0.4 in)
2003
24.6 mm (1.0 in)
2004
26.2 mm (1.0 in)
2005
26.9 mm (1.1 in)
2006
44.5 mm (1.8 in)
2007
16.0 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at South Phoenix, 1961 to 2007. The record is 92.8 mm (3.7 in) in 1990, marked on the chart; the median year is 42.2 mm (1.7 in).
Wettest five days (Rx5day) at South Phoenix by year
Year
Wettest five days (Rx5day)
1961
23.9 mm (0.9 in)
1962
34.3 mm (1.4 in)
1963
42.2 mm (1.7 in)
1964
23.4 mm (0.9 in)
1965
38.1 mm (1.5 in)
1966
56.4 mm (2.2 in)
1967
82.4 mm (3.2 in)
1968
38.1 mm (1.5 in)
1969
31.0 mm (1.2 in)
1970
69.0 mm (2.7 in)
1971
35.1 mm (1.4 in)
1972
56.2 mm (2.2 in)
1973
35.8 mm (1.4 in)
1974
51.8 mm (2.0 in)
1975
20.8 mm (0.8 in)
1976
37.6 mm (1.5 in)
1977
23.0 mm (0.9 in)
1978
48.8 mm (1.9 in)
1979
46.3 mm (1.8 in)
1980
42.4 mm (1.7 in)
1981
31.3 mm (1.2 in)
1982
47.3 mm (1.9 in)
1983
89.1 mm (3.5 in)
1984
46.6 mm (1.8 in)
1985
33.1 mm (1.3 in)
1986
41.2 mm (1.6 in)
1987
58.2 mm (2.3 in)
1988
49.0 mm (1.9 in)
1989
36.1 mm (1.4 in)
1990
92.8 mm (3.7 in)
1991
32.5 mm (1.3 in)
1992
57.9 mm (2.3 in)
1993
85.3 mm (3.4 in)
1994
54.1 mm (2.1 in)
1995
52.1 mm (2.1 in)
1996
15.5 mm (0.6 in)
1997
30.0 mm (1.2 in)
1998
42.2 mm (1.7 in)
1999
53.1 mm (2.1 in)
2000
74.2 mm (2.9 in)
2001
25.4 mm (1.0 in)
2002
14.0 mm (0.6 in)
2003
35.8 mm (1.4 in)
2004
27.2 mm (1.1 in)
2005
45.4 mm (1.8 in)
2006
44.5 mm (1.8 in)
2007
22.4 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at South Phoenix, 1961 to 2007. The record is 158 days in 1972, marked on the chart; the median year is 91 days.
Longest dry spell (CDD) at South Phoenix by year
Year
Longest dry spell (CDD)
1961
94 days
1962
99 days
1963
135 days
1964
48 days
1965
41 days
1966
95 days
1967
66 days
1968
116 days
1969
71 days
1970
117 days
1971
90 days
1972
158 days
1973
128 days
1974
107 days
1975
92 days
1976
47 days
1977
59 days
1978
104 days
1979
51 days
1980
96 days
1981
54 days
1982
52 days
1983
77 days
1984
91 days
1985
78 days
1986
106 days
1987
72 days
1988
57 days
1989
103 days
1990
31 days
1991
113 days
1992
42 days
1993
83 days
1994
52 days
1995
113 days
1996
116 days
1997
96 days
1998
52 days
1999
102 days
2000
83 days
2001
50 days
2002
115 days
2003
96 days
2004
102 days
2005
111 days
2006
80 days
2007
40 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
36 years with a frost
Across 36 years with a frost, the median last spring frost at South Phoenix falls on 7 February and the median first autumn frost on 30 November, which leaves a median of 303 days between them.
Fitted over all years, the growing season changes by +9.4 days per decade at this station.
Frost dates and growing season at South Phoenix
Measure
Median, all years
Earliest period
Recent period (1970 to 2006)
Recent against earliest
Fitted trend
Last spring frost
7 February
n/a
7 February
n/a
-8.2 days per decade
First autumn frost
30 November
n/a
30 November
n/a
+1.2 days per decade
Growing days
303 days
n/a
307 days
n/a
+9.4 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
44 years, 1961 to 2006
A day with at least 30.2 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 61.3 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at South Phoenix: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
30.2 mm (1.2 in)
5 years
40.8 mm (1.6 in)
10 years
46.7 mm (1.8 in)
25 years
53.3 mm (2.1 in)
50 years
57.6 mm (2.3 in)
Longer than the 44 years of record
100 years
61.3 mm (2.4 in)
Longer than the 44 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 44 years of values from 1961 to 2006.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 52.1 mm (2.1 in) in 1990; 52.1 mm (2.1 in) in 1995; 49.8 mm (2.0 in) in 1972.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of South Phoenix, at 1993. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1993 ran 0.5 C (0.9 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at South Phoenix, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1993
-0.5
-0.9
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for South Phoenix standing records by year: CSV or JSON. Field meanings are on the data page.
Data for South Phoenix threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.