Record envelope, standing records and threshold days for Wittmann 1SE (USC00029464), Arizona, United States, with 98 years of record.
Key Facts for Wittmann 1SE
Wittmann 1SE (USC00029464) is a weather station in Arizona, United States at 33.78 latitude and -112.52 longitude, 513 m (1,683 ft) above sea level.
The station reports from 1923 to 2020, 98 years of record.
1,464 records set at Wittmann 1SE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wittmann 1SE set a daily record high maximum temperature of 37.2 C (99.0 F) on 26 April 2020.
About the Station
Location: Arizona, United States, 33.78 latitude, -112.52 longitude.
Elevation: 513 m (1,683 ft).
Period of record: 1923 to 2020, 98 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 Wittmann 1SE. 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 Wittmann 1SE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
28.9 C (84.0 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
32.2 C (90.0 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
36.7 C (98.1 F)
-3.9 C (25.0 F)
n/a
n/a
Apr
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
May
43.9 C (111.0 F)
1.1 C (34.0 F)
n/a
n/a
Jun
48.3 C (118.9 F)
9.4 C (48.9 F)
n/a
n/a
Jul
47.2 C (117.0 F)
14.4 C (57.9 F)
n/a
n/a
Aug
46.1 C (115.0 F)
15.6 C (60.1 F)
n/a
n/a
Sep
45.0 C (113.0 F)
7.8 C (46.0 F)
n/a
n/a
Oct
39.4 C (102.9 F)
-1.7 C (28.9 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-5.0 C (23.0 F)
n/a
n/a
Dec
28.3 C (82.9 F)
-5.6 C (21.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wittmann 1SE still stand. 1934 holds the most, with 73.
Standing records at Wittmann 1SE by the year they were set
Year set
Standing records
1930
45
1931
38
1932
46
1933
66
1934
73
1935
50
1936
49
1937
37
1938
45
1939
32
1940
30
1941
45
1942
24
1943
36
1944
26
1945
41
1946
32
1947
38
1948
18
1961
1
1962
42
1963
29
1964
35
1965
38
1966
14
2001
29
2002
21
2003
34
2004
25
2005
18
2006
31
2007
17
2008
20
2009
28
2010
30
2011
37
2012
24
2013
36
2014
20
2015
28
2016
38
2017
30
2018
32
2019
31
2020
5
All-Time Record Progression
2 new records
2 all-time records were set at Wittmann 1SE between 6 February 1966 and 28 June 2013. Each dot is a new record.
When Wittmann 1SE set new all-time records
Date
Kind
Detail
1966-02-06
Record daily snowfall
Record daily snowfall 2.5 cm (1.0 in)
2013-06-28
Record high maximum temperature
Record high maximum temperature 48.3 C (118.9 F)
Wettest Day of Each Month
Sep: 74.4 mm (2.9 in)
The wettest day on record for each calendar month at Wittmann 1SE. The most was 74.4 mm (2.9 in) on 4 September 1929.
Record daily precipitation for each month at Wittmann 1SE
Month
Record daily precipitation (mm)
Date
Jan
66.3 mm (2.6 in)
21 January 2010
Feb
73.2 mm (2.9 in)
13 February 2003
Mar
35.8 mm (1.4 in)
12 March 2020
Apr
57.2 mm (2.3 in)
2 April 2004
May
25.1 mm (1.0 in)
30 May 1934
Jun
22.6 mm (0.9 in)
30 June 1956
Jul
53.1 mm (2.1 in)
17 July 1926
Aug
68.3 mm (2.7 in)
5 August 1931
Sep
74.4 mm (2.9 in)
4 September 1929
Oct
60.7 mm (2.4 in)
13 October 2018
Nov
51.8 mm (2.0 in)
13 November 1941
Dec
50.8 mm (2.0 in)
10 December 1931
Period of Record Coverage
1930 to 2020
Complete yearUnder 90 percent of days
45 years of record at Wittmann 1SE, 1930 to 2020. 5 years have data for under 90 percent of days and are left out of rankings: 1948, 1961, 1966, 2001, 2020.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Wittmann 1SE, 1930 to 2019. Blue stripes are years cooler than the station's own mean of 20.9 C (69.7 F); red stripes are warmer. The coolest year was 1941, at 19.6 C (67.3 F), and the warmest was 1934, at 22.3 C (72.1 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Wittmann 1SE as warming stripes, 1930 to 2019
Year
Annual mean temperature
Difference from the station mean
1930
20.1 C
-0.85 C
1931
20.4 C
-0.55 C
1932
20.1 C
-0.89 C
1933
20.5 C
-0.40 C
1934
22.3 C
+1.34 C
1935
20.0 C
-0.96 C
1936
21.3 C
+0.36 C
1937
20.7 C
-0.25 C
1938
20.7 C
-0.24 C
1939
20.8 C
-0.12 C
1940
21.5 C
+0.55 C
1941
19.6 C
-1.34 C
1942
20.4 C
-0.58 C
1943
21.2 C
+0.22 C
1944
19.9 C
-1.00 C
1945
19.7 C
-1.27 C
1946
20.4 C
-0.54 C
1962
21.6 C
+0.61 C
1964
20.0 C
-0.99 C
1965
20.1 C
-0.83 C
2002
21.4 C
+0.42 C
2003
21.5 C
+0.53 C
2004
20.8 C
-0.12 C
2005
20.9 C
-0.08 C
2006
21.2 C
+0.25 C
2007
21.0 C
+0.08 C
2008
20.8 C
-0.16 C
2010
20.8 C
-0.13 C
2011
21.2 C
+0.25 C
2012
22.0 C
+1.06 C
2013
21.5 C
+0.55 C
2014
22.2 C
+1.24 C
2015
21.9 C
+0.91 C
2016
22.1 C
+1.19 C
2017
22.2 C
+1.25 C
2018
21.7 C
+0.79 C
2019
20.7 C
-0.20 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1930 to 2019. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wittmann 1SE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1930 to 2019
37
Rise
Mean daily maximum
0.06 C (-0.01 to 0.13) per decade
0.11 F (-0.03 to 0.24) per decade
1930 to 2019
37
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1930 to 2019
37
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
1923 to 2020
Yearly extremes at Wittmann 1SE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
48.3 C (118.9 F)
2013
45.0 C (113.0 F)
45
Coldest night (TNn)
-11.1 C (12.0 F)
1963
-4.4 C (24.1 F)
45
Wettest day (Rx1day)
74.4 mm (2.9 in)
1929
35.0 mm (1.4 in)
62
Wettest five days (Rx5day)
135.1 mm (5.3 in)
1931
48.6 mm (1.9 in)
62
Longest dry spell (CDD)
192 days
1960
79 days
62
Hottest day (TXx)
The hottest day of the year at Wittmann 1SE, 1923 to 2020. The record is 48.3 C (118.9 F) in 2013, marked on the chart; the median year is 45.0 C (113.0 F).
Hottest day (TXx) at Wittmann 1SE by year
Year
Hottest day (TXx)
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
45.0 C (113.0 F)
1931
45.0 C (113.0 F)
1932
44.4 C (111.9 F)
1933
46.1 C (115.0 F)
1934
46.1 C (115.0 F)
1935
43.9 C (111.0 F)
1936
46.1 C (115.0 F)
1937
46.7 C (116.1 F)
1938
45.6 C (114.1 F)
1939
45.6 C (114.1 F)
1940
46.7 C (116.1 F)
1941
43.9 C (111.0 F)
1942
47.2 C (117.0 F)
1943
46.1 C (115.0 F)
1944
44.4 C (111.9 F)
1945
44.4 C (111.9 F)
1946
44.4 C (111.9 F)
1947
45.6 C (114.1 F)
1948
27.8 C (82.0 F)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
22.2 C (72.0 F)
1962
46.1 C (115.0 F)
1963
44.4 C (111.9 F)
1964
44.4 C (111.9 F)
1965
45.0 C (113.0 F)
1966
45.0 C (113.0 F)
2001
46.1 C (115.0 F)
2002
43.9 C (111.0 F)
2003
45.6 C (114.1 F)
2004
43.3 C (109.9 F)
2005
46.7 C (116.1 F)
2006
46.7 C (116.1 F)
2007
44.4 C (111.9 F)
2008
44.4 C (111.9 F)
2009
46.1 C (115.0 F)
2010
45.0 C (113.0 F)
2011
45.6 C (114.1 F)
2012
45.0 C (113.0 F)
2013
48.3 C (118.9 F)
2014
45.0 C (113.0 F)
2015
45.0 C (113.0 F)
2016
47.8 C (118.0 F)
2017
48.3 C (118.9 F)
2018
46.7 C (116.1 F)
2019
46.1 C (115.0 F)
2020
37.2 C (99.0 F)
Coldest night (TNn)
The coldest night of the year at Wittmann 1SE, 1923 to 2020. The record is -11.1 C (12.0 F) in 1963, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Wittmann 1SE by year
Year
Coldest night (TNn)
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
-5.0 C (23.0 F)
1931
-4.4 C (24.1 F)
1932
-5.6 C (21.9 F)
1933
-7.8 C (18.0 F)
1934
-5.0 C (23.0 F)
1935
-5.0 C (23.0 F)
1936
-3.3 C (26.1 F)
1937
-8.9 C (16.0 F)
1938
-5.0 C (23.0 F)
1939
-5.0 C (23.0 F)
1940
-3.9 C (25.0 F)
1941
-3.3 C (26.1 F)
1942
-3.3 C (26.1 F)
1943
-5.0 C (23.0 F)
1944
-2.2 C (28.0 F)
1945
-5.6 C (21.9 F)
1946
-5.6 C (21.9 F)
1947
-6.7 C (19.9 F)
1948
-5.6 C (21.9 F)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
1.7 C (35.1 F)
1962
-5.6 C (21.9 F)
1963
-11.1 C (12.0 F)
1964
-6.1 C (21.0 F)
1965
-3.3 C (26.1 F)
1966
-3.9 C (25.0 F)
2001
-2.8 C (27.0 F)
2002
-5.6 C (21.9 F)
2003
-4.4 C (24.1 F)
2004
-3.9 C (25.0 F)
2005
-4.4 C (24.1 F)
2006
-2.8 C (27.0 F)
2007
-5.6 C (21.9 F)
2008
-5.0 C (23.0 F)
2009
-2.2 C (28.0 F)
2010
-3.9 C (25.0 F)
2011
-8.3 C (17.1 F)
2012
-1.7 C (28.9 F)
2013
-7.8 C (18.0 F)
2014
-2.8 C (27.0 F)
2015
-3.9 C (25.0 F)
2016
-4.4 C (24.1 F)
2017
-2.2 C (28.0 F)
2018
-2.8 C (27.0 F)
2019
-4.4 C (24.1 F)
2020
-3.9 C (25.0 F)
Wettest day (Rx1day)
The wettest day of the year at Wittmann 1SE, 1923 to 2020. The record is 74.4 mm (2.9 in) in 1929, marked on the chart; the median year is 35.0 mm (1.4 in).
Wettest day (Rx1day) at Wittmann 1SE by year
Year
Wettest day (Rx1day)
1923
34.0 mm (1.3 in)
1924
16.5 mm (0.6 in)
1925
33.8 mm (1.3 in)
1926
53.1 mm (2.1 in)
1927
34.3 mm (1.4 in)
1928
21.3 mm (0.8 in)
1929
74.4 mm (2.9 in)
1930
45.0 mm (1.8 in)
1931
68.3 mm (2.7 in)
1932
19.6 mm (0.8 in)
1933
27.7 mm (1.1 in)
1934
32.0 mm (1.3 in)
1935
33.5 mm (1.3 in)
1936
22.9 mm (0.9 in)
1937
33.8 mm (1.3 in)
1938
34.8 mm (1.4 in)
1939
55.4 mm (2.2 in)
1940
46.7 mm (1.8 in)
1941
51.8 mm (2.0 in)
1942
36.6 mm (1.4 in)
1943
27.9 mm (1.1 in)
1944
28.4 mm (1.1 in)
1945
23.4 mm (0.9 in)
1946
65.5 mm (2.6 in)
1947
36.6 mm (1.4 in)
1948
9.9 mm (0.39 in)
1951
9.4 mm (0.37 in)
1952
37.6 mm (1.5 in)
1953
35.8 mm (1.4 in)
1954
25.1 mm (1.0 in)
1955
41.9 mm (1.6 in)
1956
22.6 mm (0.9 in)
1957
18.3 mm (0.7 in)
1958
49.5 mm (1.9 in)
1959
35.6 mm (1.4 in)
1960
20.3 mm (0.8 in)
1961
24.1 mm (0.9 in)
1962
19.6 mm (0.8 in)
1963
42.7 mm (1.7 in)
1964
40.6 mm (1.6 in)
1965
45.7 mm (1.8 in)
1966
16.0 mm (0.6 in)
2001
27.9 mm (1.1 in)
2002
35.8 mm (1.4 in)
2003
73.2 mm (2.9 in)
2004
57.2 mm (2.3 in)
2005
31.0 mm (1.2 in)
2006
40.9 mm (1.6 in)
2007
38.9 mm (1.5 in)
2008
36.8 mm (1.4 in)
2009
19.6 mm (0.8 in)
2010
66.3 mm (2.6 in)
2011
21.8 mm (0.9 in)
2012
35.1 mm (1.4 in)
2013
43.2 mm (1.7 in)
2014
56.1 mm (2.2 in)
2015
25.9 mm (1.0 in)
2016
30.5 mm (1.2 in)
2017
30.0 mm (1.2 in)
2018
60.7 mm (2.4 in)
2019
47.2 mm (1.9 in)
2020
35.8 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wittmann 1SE, 1923 to 2020. The record is 135.1 mm (5.3 in) in 1931, marked on the chart; the median year is 48.6 mm (1.9 in).
Wettest five days (Rx5day) at Wittmann 1SE by year
Year
Wettest five days (Rx5day)
1923
55.9 mm (2.2 in)
1924
22.3 mm (0.9 in)
1925
33.8 mm (1.3 in)
1926
85.9 mm (3.4 in)
1927
58.8 mm (2.3 in)
1928
24.3 mm (1.0 in)
1929
99.2 mm (3.9 in)
1930
49.0 mm (1.9 in)
1931
135.1 mm (5.3 in)
1932
48.6 mm (1.9 in)
1933
51.1 mm (2.0 in)
1934
37.3 mm (1.5 in)
1935
48.0 mm (1.9 in)
1936
29.8 mm (1.2 in)
1937
41.2 mm (1.6 in)
1938
47.2 mm (1.9 in)
1939
68.2 mm (2.7 in)
1940
47.5 mm (1.9 in)
1941
55.1 mm (2.2 in)
1942
43.5 mm (1.7 in)
1943
49.5 mm (1.9 in)
1944
45.4 mm (1.8 in)
1945
39.3 mm (1.5 in)
1946
81.2 mm (3.2 in)
1947
43.7 mm (1.7 in)
1948
18.8 mm (0.7 in)
1951
16.0 mm (0.6 in)
1952
37.6 mm (1.5 in)
1953
73.4 mm (2.9 in)
1954
42.7 mm (1.7 in)
1955
45.5 mm (1.8 in)
1956
22.6 mm (0.9 in)
1957
33.1 mm (1.3 in)
1958
49.5 mm (1.9 in)
1959
66.5 mm (2.6 in)
1960
33.5 mm (1.3 in)
1961
29.2 mm (1.1 in)
1962
43.5 mm (1.7 in)
1963
75.5 mm (3.0 in)
1964
40.6 mm (1.6 in)
1965
61.5 mm (2.4 in)
1966
16.5 mm (0.6 in)
2001
28.2 mm (1.1 in)
2002
65.3 mm (2.6 in)
2003
85.2 mm (3.4 in)
2004
57.7 mm (2.3 in)
2005
48.5 mm (1.9 in)
2006
76.7 mm (3.0 in)
2007
49.8 mm (2.0 in)
2008
47.2 mm (1.9 in)
2009
25.2 mm (1.0 in)
2010
124.1 mm (4.9 in)
2011
32.7 mm (1.3 in)
2012
48.7 mm (1.9 in)
2013
63.8 mm (2.5 in)
2014
58.9 mm (2.3 in)
2015
34.5 mm (1.4 in)
2016
56.2 mm (2.2 in)
2017
49.1 mm (1.9 in)
2018
66.0 mm (2.6 in)
2019
86.4 mm (3.4 in)
2020
84.8 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wittmann 1SE, 1923 to 2020. The record is 192 days in 1960, marked on the chart; the median year is 79 days.
Longest dry spell (CDD) at Wittmann 1SE by year
Year
Longest dry spell (CDD)
1923
16 days
1924
77 days
1925
70 days
1926
79 days
1927
42 days
1928
69 days
1929
111 days
1930
42 days
1931
67 days
1932
104 days
1933
51 days
1934
53 days
1935
70 days
1936
115 days
1937
70 days
1938
120 days
1939
84 days
1940
52 days
1941
56 days
1942
79 days
1943
74 days
1944
71 days
1945
73 days
1946
100 days
1947
72 days
1948
37 days
1951
22 days
1952
75 days
1953
100 days
1954
91 days
1955
123 days
1956
76 days
1957
36 days
1958
87 days
1959
143 days
1960
192 days
1961
94 days
1962
127 days
1963
100 days
1964
112 days
1965
65 days
1966
164 days
2001
72 days
2002
160 days
2003
62 days
2004
95 days
2005
83 days
2006
117 days
2007
100 days
2008
90 days
2009
67 days
2010
137 days
2011
96 days
2012
80 days
2013
123 days
2014
124 days
2015
50 days
2016
66 days
2017
140 days
2018
96 days
2019
76 days
2020
39 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Wittmann 1SE falls on 25 February and the median first autumn frost on 3 December, which leaves a median of 287 days between them.
Fitted over all years, the growing season changes by +3.0 days per decade at this station.
Frost dates and growing season at Wittmann 1SE
Measure
Median, all years
Earliest period
Recent period (1937 to 2019)
Recent against earliest
Fitted trend
Last spring frost
25 February
n/a
26 February
n/a
-2.2 days per decade
First autumn frost
3 December
n/a
5 December
n/a
+0.8 days per decade
Growing days
287 days
n/a
288 days
n/a
+3.0 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
54 years, 1924 to 2019
A day with at least 35.6 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 86.3 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Wittmann 1SE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
35.6 mm (1.4 in)
5 years
49.2 mm (1.9 in)
10 years
58.2 mm (2.3 in)
25 years
69.6 mm (2.7 in)
50 years
78.0 mm (3.1 in)
100 years
86.3 mm (3.4 in)
Longer than the 54 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, 54 years of values from 1924 to 2019.
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: 74.4 mm (2.9 in) in 1929; 73.2 mm (2.9 in) in 2003; 68.3 mm (2.7 in) in 1931.
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Data for Wittmann 1SE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wittmann 1SE 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.