Record envelope, standing records and threshold days for Tempe (USC00028489), Arizona, United States, with 59 years of record.
Key Facts for Tempe
Tempe (USC00028489) is a weather station in Arizona, United States at 33.43 latitude and -111.93 longitude, 351 m (1,152 ft) above sea level.
The station reports from 1926 to 1984, 59 years of record.
1,464 records set at Tempe still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tempe set a daily record low maximum temperature of 22.2 C (72.0 F) on 27 September 1984.
About the Station
Location: Arizona, United States, 33.43 latitude, -111.93 longitude.
Elevation: 351 m (1,152 ft).
Period of record: 1926 to 1984, 59 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 Tempe. 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 Tempe, 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)
-9.4 C (15.1 F)
n/a
n/a
Feb
32.8 C (91.0 F)
-6.1 C (21.0 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-4.4 C (24.1 F)
n/a
n/a
Apr
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
May
44.4 C (111.9 F)
2.2 C (36.0 F)
n/a
n/a
Jun
47.8 C (118.0 F)
7.2 C (45.0 F)
n/a
n/a
Jul
46.7 C (116.1 F)
13.9 C (57.0 F)
n/a
n/a
Aug
46.7 C (116.1 F)
11.7 C (53.1 F)
n/a
n/a
Sep
45.6 C (114.1 F)
7.2 C (45.0 F)
n/a
n/a
Oct
42.2 C (108.0 F)
-1.7 C (28.9 F)
n/a
n/a
Nov
35.0 C (95.0 F)
-3.9 C (25.0 F)
n/a
n/a
Dec
32.2 C (90.0 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 Tempe still stand. 1949 holds the most, with 57.
Standing records at Tempe by the year they were set
Year set
Standing records
1926
29
1927
23
1928
30
1929
45
1930
35
1931
28
1932
18
1933
32
1934
30
1935
24
1936
15
1937
19
1938
24
1939
21
1940
21
1941
28
1942
19
1943
20
1944
28
1945
18
1946
26
1947
23
1948
16
1949
57
1950
56
1951
20
1952
18
1953
23
1954
26
1955
37
1956
20
1957
21
1958
24
1959
18
1960
38
1961
13
1962
37
1963
22
1964
22
1965
34
1966
17
1967
17
1968
17
1969
26
1970
22
1971
22
1972
38
1973
15
1974
13
1975
16
1976
25
1977
26
1978
28
1979
24
1980
22
1981
25
1982
22
1983
14
1984
17
All-Time Record Progression
1 new records
1 all-time records were set at Tempe between 26 June 1970 and 26 June 1970. Each dot is a new record.
When Tempe set new all-time records
Date
Kind
Detail
1970-06-26
Record high maximum temperature
Record high maximum temperature 47.8 C (118.0 F)
Wettest Day of Each Month
Aug: 83.8 mm (3.3 in)
The wettest day on record for each calendar month at Tempe. The most was 83.8 mm (3.3 in) on 28 August 1951.
Record daily precipitation for each month at Tempe
Month
Record daily precipitation (mm)
Date
Jan
27.2 mm (1.1 in)
17 January 1979
Feb
34.3 mm (1.4 in)
10 February 1932
Mar
46.0 mm (1.8 in)
17 March 1937
Apr
29.7 mm (1.2 in)
6 April 1926
May
34.3 mm (1.4 in)
2 May 1941
Jun
16.0 mm (0.6 in)
19 June 1967
Jul
39.1 mm (1.5 in)
25 July 1955
Aug
83.8 mm (3.3 in)
28 August 1951
Sep
49.8 mm (2.0 in)
6 September 1970
Oct
37.3 mm (1.5 in)
30 October 1959
Nov
32.8 mm (1.3 in)
13 November 1941
Dec
54.9 mm (2.2 in)
15 December 1967
Period of Record Coverage
1926 to 1984
Complete yearUnder 90 percent of days
59 years of record at Tempe, 1926 to 1984. 1 years have data for under 90 percent of days and are left out of rankings: 1984.
Cooler than the station meanWarmer than the station mean
One stripe for each of 56 complete years at Tempe, 1926 to 1983. Blue stripes are years cooler than the station's own mean of 20.4 C (68.8 F); red stripes are warmer. The coolest year was 1944, at 19.3 C (66.8 F), and the warmest was 1981, at 22.1 C (71.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Tempe as warming stripes, 1926 to 1983
Year
Annual mean temperature
Difference from the station mean
1926
21.2 C
+0.77 C
1927
21.2 C
+0.76 C
1929
20.3 C
-0.14 C
1930
19.9 C
-0.49 C
1931
20.3 C
-0.11 C
1932
19.6 C
-0.85 C
1933
19.6 C
-0.86 C
1934
20.8 C
+0.37 C
1935
19.4 C
-1.01 C
1936
20.6 C
+0.20 C
1937
20.1 C
-0.38 C
1938
19.8 C
-0.65 C
1939
20.2 C
-0.26 C
1940
20.8 C
+0.35 C
1941
19.4 C
-1.02 C
1942
19.7 C
-0.74 C
1943
20.6 C
+0.16 C
1944
19.3 C
-1.09 C
1945
19.5 C
-0.89 C
1946
20.2 C
-0.23 C
1947
20.5 C
+0.10 C
1948
20.1 C
-0.34 C
1949
20.2 C
-0.26 C
1950
21.0 C
+0.52 C
1951
20.2 C
-0.19 C
1952
20.2 C
-0.27 C
1953
20.1 C
-0.35 C
1954
21.1 C
+0.66 C
1955
19.8 C
-0.62 C
1956
20.4 C
-0.08 C
1957
20.6 C
+0.19 C
1958
21.3 C
+0.89 C
1959
21.1 C
+0.68 C
1960
20.7 C
+0.29 C
1961
20.5 C
+0.09 C
1962
20.6 C
+0.21 C
1963
20.8 C
+0.35 C
1964
19.5 C
-0.91 C
1965
19.9 C
-0.52 C
1966
20.7 C
+0.24 C
1967
20.3 C
-0.18 C
1968
20.2 C
-0.28 C
1970
20.6 C
+0.20 C
1971
20.0 C
-0.41 C
1972
20.8 C
+0.32 C
1973
20.3 C
-0.16 C
1974
20.7 C
+0.31 C
1975
19.9 C
-0.55 C
1976
20.7 C
+0.22 C
1977
21.3 C
+0.84 C
1978
21.4 C
+1.01 C
1979
20.9 C
+0.50 C
1980
21.5 C
+1.08 C
1981
22.1 C
+1.66 C
1982
20.6 C
+0.19 C
1983
21.0 C
+0.56 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1926 to 1983. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tempe
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1926 to 1983
56
Rise
Mean daily maximum
0.16 C (0.05 to 0.27) per decade
0.3 F (0.1 to 0.5) per decade
1926 to 1983
56
Rise
Mean daily minimum
0.14 C (0.02 to 0.26) per decade
0.24 F (0.03 to 0.46) per decade
1926 to 1983
56
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
1926 to 1984
Yearly extremes at Tempe: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.8 C (118.0 F)
1970
45.0 C (113.0 F)
59
Coldest night (TNn)
-9.4 C (15.1 F)
1950
-4.4 C (24.1 F)
59
Wettest day (Rx1day)
83.8 mm (3.3 in)
1951
29.7 mm (1.2 in)
59
Wettest five days (Rx5day)
105.7 mm (4.2 in)
1951
42.0 mm (1.7 in)
59
Longest dry spell (CDD)
155 days
1972
77 days
59
Hottest day (TXx)
The hottest day of the year at Tempe, 1926 to 1984. The record is 47.8 C (118.0 F) in 1970, marked on the chart; the median year is 45.0 C (113.0 F).
Hottest day (TXx) at Tempe by year
Year
Hottest day (TXx)
1926
45.0 C (113.0 F)
1927
45.0 C (113.0 F)
1928
44.4 C (111.9 F)
1929
46.1 C (115.0 F)
1930
43.9 C (111.0 F)
1931
42.8 C (109.0 F)
1932
43.3 C (109.9 F)
1933
44.4 C (111.9 F)
1934
44.4 C (111.9 F)
1935
43.3 C (109.9 F)
1936
43.9 C (111.0 F)
1937
44.4 C (111.9 F)
1938
42.2 C (108.0 F)
1939
43.9 C (111.0 F)
1940
45.0 C (113.0 F)
1941
41.7 C (107.1 F)
1942
43.9 C (111.0 F)
1943
45.0 C (113.0 F)
1944
43.9 C (111.0 F)
1945
43.3 C (109.9 F)
1946
45.0 C (113.0 F)
1947
45.6 C (114.1 F)
1948
44.4 C (111.9 F)
1949
45.0 C (113.0 F)
1950
45.0 C (113.0 F)
1951
43.3 C (109.9 F)
1952
43.9 C (111.0 F)
1953
44.4 C (111.9 F)
1954
43.9 C (111.0 F)
1955
43.9 C (111.0 F)
1956
44.4 C (111.9 F)
1957
45.0 C (113.0 F)
1958
46.1 C (115.0 F)
1959
46.1 C (115.0 F)
1960
46.1 C (115.0 F)
1961
45.6 C (114.1 F)
1962
45.6 C (114.1 F)
1963
45.0 C (113.0 F)
1964
45.0 C (113.0 F)
1965
44.4 C (111.9 F)
1966
44.4 C (111.9 F)
1967
43.9 C (111.0 F)
1968
46.1 C (115.0 F)
1969
45.6 C (114.1 F)
1970
47.8 C (118.0 F)
1971
45.0 C (113.0 F)
1972
46.7 C (116.1 F)
1973
45.6 C (114.1 F)
1974
46.1 C (115.0 F)
1975
45.0 C (113.0 F)
1976
45.6 C (114.1 F)
1977
45.0 C (113.0 F)
1978
46.1 C (115.0 F)
1979
47.2 C (117.0 F)
1980
45.6 C (114.1 F)
1981
45.6 C (114.1 F)
1982
45.0 C (113.0 F)
1983
46.1 C (115.0 F)
1984
46.7 C (116.1 F)
Coldest night (TNn)
The coldest night of the year at Tempe, 1926 to 1984. The record is -9.4 C (15.1 F) in 1950, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Tempe by year
Year
Coldest night (TNn)
1926
-3.9 C (25.0 F)
1927
-0.6 C (30.9 F)
1928
-1.7 C (28.9 F)
1929
-4.4 C (24.1 F)
1930
-6.1 C (21.0 F)
1931
-5.0 C (23.0 F)
1932
-5.6 C (21.9 F)
1933
-6.1 C (21.0 F)
1934
-5.6 C (21.9 F)
1935
-3.9 C (25.0 F)
1936
-4.4 C (24.1 F)
1937
-6.7 C (19.9 F)
1938
-3.9 C (25.0 F)
1939
-3.9 C (25.0 F)
1940
-5.6 C (21.9 F)
1941
-3.9 C (25.0 F)
1942
-3.9 C (25.0 F)
1943
-2.2 C (28.0 F)
1944
-3.3 C (26.1 F)
1945
-5.6 C (21.9 F)
1946
-3.9 C (25.0 F)
1947
-5.0 C (23.0 F)
1948
-7.2 C (19.0 F)
1949
-6.7 C (19.9 F)
1950
-9.4 C (15.1 F)
1951
-5.6 C (21.9 F)
1952
-4.4 C (24.1 F)
1953
-6.7 C (19.9 F)
1954
-6.1 C (21.0 F)
1955
-5.6 C (21.9 F)
1956
-5.0 C (23.0 F)
1957
-2.8 C (27.0 F)
1958
-2.8 C (27.0 F)
1959
-3.9 C (25.0 F)
1960
-6.1 C (21.0 F)
1961
-3.3 C (26.1 F)
1962
-6.7 C (19.9 F)
1963
-8.3 C (17.1 F)
1964
-6.7 C (19.9 F)
1965
-4.4 C (24.1 F)
1966
-5.0 C (23.0 F)
1967
-5.6 C (21.9 F)
1968
-6.7 C (19.9 F)
1969
-3.9 C (25.0 F)
1970
-5.0 C (23.0 F)
1971
-7.8 C (18.0 F)
1972
-3.9 C (25.0 F)
1973
-2.2 C (28.0 F)
1974
-5.6 C (21.9 F)
1975
-3.9 C (25.0 F)
1976
-6.1 C (21.0 F)
1977
-2.8 C (27.0 F)
1978
-6.1 C (21.0 F)
1979
-2.8 C (27.0 F)
1980
-0.6 C (30.9 F)
1981
-1.7 C (28.9 F)
1982
-2.2 C (28.0 F)
1983
-1.7 C (28.9 F)
1984
-2.8 C (27.0 F)
Wettest day (Rx1day)
The wettest day of the year at Tempe, 1926 to 1984. The record is 83.8 mm (3.3 in) in 1951, marked on the chart; the median year is 29.7 mm (1.2 in).
Wettest day (Rx1day) at Tempe by year
Year
Wettest day (Rx1day)
1926
36.8 mm (1.4 in)
1927
32.0 mm (1.3 in)
1928
26.9 mm (1.1 in)
1929
22.4 mm (0.9 in)
1930
21.8 mm (0.9 in)
1931
31.5 mm (1.2 in)
1932
34.3 mm (1.4 in)
1933
23.9 mm (0.9 in)
1934
19.1 mm (0.8 in)
1935
30.0 mm (1.2 in)
1936
30.2 mm (1.2 in)
1937
46.0 mm (1.8 in)
1938
16.3 mm (0.6 in)
1939
22.9 mm (0.9 in)
1940
32.0 mm (1.3 in)
1941
36.3 mm (1.4 in)
1942
17.5 mm (0.7 in)
1943
46.0 mm (1.8 in)
1944
32.0 mm (1.3 in)
1945
18.5 mm (0.7 in)
1946
38.4 mm (1.5 in)
1947
18.0 mm (0.7 in)
1948
13.7 mm (0.5 in)
1949
45.5 mm (1.8 in)
1950
32.3 mm (1.3 in)
1951
83.8 mm (3.3 in)
1952
45.5 mm (1.8 in)
1953
18.0 mm (0.7 in)
1954
24.6 mm (1.0 in)
1955
39.1 mm (1.5 in)
1956
9.7 mm (0.38 in)
1957
24.4 mm (1.0 in)
1958
27.4 mm (1.1 in)
1959
37.3 mm (1.5 in)
1960
22.6 mm (0.9 in)
1961
20.3 mm (0.8 in)
1962
23.1 mm (0.9 in)
1963
30.2 mm (1.2 in)
1964
42.9 mm (1.7 in)
1965
24.6 mm (1.0 in)
1966
54.6 mm (2.1 in)
1967
54.9 mm (2.2 in)
1968
25.7 mm (1.0 in)
1969
39.4 mm (1.6 in)
1970
49.8 mm (2.0 in)
1971
17.3 mm (0.7 in)
1972
29.7 mm (1.2 in)
1973
23.4 mm (0.9 in)
1974
50.3 mm (2.0 in)
1975
19.6 mm (0.8 in)
1976
31.5 mm (1.2 in)
1977
18.5 mm (0.7 in)
1978
37.6 mm (1.5 in)
1979
27.2 mm (1.1 in)
1980
28.7 mm (1.1 in)
1981
17.0 mm (0.7 in)
1982
24.1 mm (0.9 in)
1983
34.3 mm (1.4 in)
1984
32.0 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tempe, 1926 to 1984. The record is 105.7 mm (4.2 in) in 1951, marked on the chart; the median year is 42.0 mm (1.7 in).
Wettest five days (Rx5day) at Tempe by year
Year
Wettest five days (Rx5day)
1926
55.6 mm (2.2 in)
1927
44.9 mm (1.8 in)
1928
29.2 mm (1.1 in)
1929
22.4 mm (0.9 in)
1930
46.5 mm (1.8 in)
1931
62.5 mm (2.5 in)
1932
41.7 mm (1.6 in)
1933
42.0 mm (1.7 in)
1934
23.6 mm (0.9 in)
1935
49.6 mm (2.0 in)
1936
52.0 mm (2.0 in)
1937
51.9 mm (2.0 in)
1938
29.3 mm (1.2 in)
1939
41.2 mm (1.6 in)
1940
60.2 mm (2.4 in)
1941
69.5 mm (2.7 in)
1942
29.2 mm (1.1 in)
1943
79.5 mm (3.1 in)
1944
36.5 mm (1.4 in)
1945
25.2 mm (1.0 in)
1946
57.7 mm (2.3 in)
1947
22.3 mm (0.9 in)
1948
31.5 mm (1.2 in)
1949
46.0 mm (1.8 in)
1950
46.8 mm (1.8 in)
1951
105.7 mm (4.2 in)
1952
45.5 mm (1.8 in)
1953
27.7 mm (1.1 in)
1954
29.7 mm (1.2 in)
1955
70.1 mm (2.8 in)
1956
17.3 mm (0.7 in)
1957
35.9 mm (1.4 in)
1958
34.2 mm (1.3 in)
1959
58.1 mm (2.3 in)
1960
26.7 mm (1.1 in)
1961
20.3 mm (0.8 in)
1962
35.1 mm (1.4 in)
1963
30.2 mm (1.2 in)
1964
52.3 mm (2.1 in)
1965
42.2 mm (1.7 in)
1966
87.9 mm (3.5 in)
1967
85.4 mm (3.4 in)
1968
34.6 mm (1.4 in)
1969
59.7 mm (2.4 in)
1970
64.5 mm (2.5 in)
1971
24.9 mm (1.0 in)
1972
62.5 mm (2.5 in)
1973
30.5 mm (1.2 in)
1974
52.6 mm (2.1 in)
1975
23.9 mm (0.9 in)
1976
45.5 mm (1.8 in)
1977
26.9 mm (1.1 in)
1978
53.9 mm (2.1 in)
1979
40.7 mm (1.6 in)
1980
44.5 mm (1.8 in)
1981
30.9 mm (1.2 in)
1982
38.4 mm (1.5 in)
1983
68.6 mm (2.7 in)
1984
36.6 mm (1.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tempe, 1926 to 1984. The record is 155 days in 1972, marked on the chart; the median year is 77 days.
Longest dry spell (CDD) at Tempe by year
Year
Longest dry spell (CDD)
1926
45 days
1927
42 days
1928
132 days
1929
110 days
1930
49 days
1931
93 days
1932
68 days
1933
51 days
1934
54 days
1935
70 days
1936
104 days
1937
80 days
1938
68 days
1939
64 days
1940
107 days
1941
75 days
1942
81 days
1943
114 days
1944
73 days
1945
119 days
1946
83 days
1947
74 days
1948
79 days
1949
51 days
1950
100 days
1951
64 days
1952
40 days
1953
135 days
1954
68 days
1955
106 days
1956
93 days
1957
51 days
1958
78 days
1959
96 days
1960
142 days
1961
94 days
1962
99 days
1963
97 days
1964
76 days
1965
41 days
1966
116 days
1967
64 days
1968
53 days
1969
77 days
1970
130 days
1971
73 days
1972
155 days
1973
109 days
1974
108 days
1975
92 days
1976
52 days
1977
49 days
1978
97 days
1979
64 days
1980
60 days
1981
54 days
1982
62 days
1983
76 days
1984
97 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
56 years with a frost
Across 56 years with a frost, the median last spring frost at Tempe falls on 26 February and the median first autumn frost on 26 November, which leaves a median of 282 days between them.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Tempe
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
26 February
n/a
25 February
n/a
-0.6 days per decade
First autumn frost
26 November
n/a
27 November
n/a
+1.7 days per decade
Growing days
282 days
n/a
287 days
n/a
+2.3 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
58 years, 1926 to 1983
A day with at least 28.3 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 73.5 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Tempe: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
28.3 mm (1.1 in)
5 years
39.4 mm (1.6 in)
10 years
47.1 mm (1.9 in)
25 years
57.3 mm (2.3 in)
50 years
65.3 mm (2.6 in)
100 years
73.5 mm (2.9 in)
Longer than the 58 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, 58 years of values from 1926 to 1983.
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: 83.8 mm (3.3 in) in 1951; 54.9 mm (2.2 in) in 1967; 54.6 mm (2.1 in) in 1966.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Tempe, at 1974. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Tempe, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1974
-0.2
-0.4
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 Tempe standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tempe 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.