Record envelope, standing records and threshold days for Supai (USC00028343), Arizona, United States, with 89 years of record.
Key Facts for Supai
Supai (USC00028343) is a weather station in Arizona, United States at 36.20 latitude and -112.70 longitude, 977 m (3,204 ft) above sea level.
The station reports from 1899 to 1987, 89 years of record.
1,464 records set at Supai still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Supai set a daily record low maximum temperature of 8.3 C (46.9 F) on 25 February 1987.
About the Station
Location: Arizona, United States, 36.20 latitude, -112.70 longitude.
Elevation: 977 m (3,204 ft).
Period of record: 1899 to 1987, 89 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 Supai. 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 Supai, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.1 C (79.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Feb
30.6 C (87.1 F)
-15.0 C (5.0 F)
n/a
n/a
Mar
35.0 C (95.0 F)
-10.6 C (12.9 F)
n/a
n/a
Apr
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
May
41.7 C (107.1 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
44.4 C (111.9 F)
2.2 C (36.0 F)
n/a
n/a
Jul
46.7 C (116.1 F)
7.8 C (46.0 F)
n/a
n/a
Aug
46.1 C (115.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
43.9 C (111.0 F)
1.1 C (34.0 F)
n/a
n/a
Oct
38.9 C (102.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
29.4 C (84.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Supai still stand. 1962 holds the most, with 97.
Standing records at Supai by the year they were set
Year set
Standing records
1899
20
1900
53
1901
39
1907
1
1908
26
1909
18
1911
8
1912
18
1913
25
1914
55
1915
16
1916
10
1917
17
1918
25
1919
3
1920
10
1921
20
1922
29
1923
14
1924
23
1925
40
1926
5
1927
27
1928
31
1929
44
1930
53
1931
27
1932
34
1933
14
1934
4
1956
4
1957
27
1958
14
1959
14
1960
34
1961
65
1962
97
1963
33
1964
8
1965
13
1966
13
1967
23
1968
23
1969
16
1970
25
1971
17
1972
26
1973
7
1974
9
1975
21
1976
14
1977
11
1978
24
1979
43
1980
33
1981
31
1982
13
1983
13
1984
20
1985
33
1986
27
1987
4
All-Time Record Progression
2 new records
2 all-time records were set at Supai between 1 July 1969 and 5 July 1985. Each dot is a new record.
When Supai set new all-time records
Date
Kind
Detail
1969-07-01
Record high minimum temperature
Record high minimum temperature 35.6 C (96.1 F)
1985-07-05
Record high maximum temperature
Record high maximum temperature 46.7 C (116.1 F)
Wettest Day of Each Month
Feb: 115.6 mm (4.6 in)
The wettest day on record for each calendar month at Supai. The most was 115.6 mm (4.6 in) on 9 February 1932.
Record daily precipitation for each month at Supai
Month
Record daily precipitation (mm)
Date
Jan
17.3 mm (0.7 in)
27 January 1914
Feb
115.6 mm (4.6 in)
9 February 1932
Mar
25.1 mm (1.0 in)
22 March 1958
Apr
22.9 mm (0.9 in)
1 April 1930
May
38.1 mm (1.5 in)
13 May 1928
Jun
40.1 mm (1.6 in)
30 June 1966
Jul
59.9 mm (2.4 in)
30 July 1976
Aug
45.7 mm (1.8 in)
8 August 1918
Sep
33.3 mm (1.3 in)
29 September 1911
Oct
50.0 mm (2.0 in)
5 October 1925
Nov
34.3 mm (1.4 in)
7 November 1963
Dec
78.2 mm (3.1 in)
9 December 1931
Period of Record Coverage
1899 to 1987
Complete yearUnder 90 percent of days
62 years of record at Supai, 1899 to 1987. 25 years have data for under 90 percent of days and are left out of rankings: 1899, 1901, 1907, 1911, 1916, 1917, 1918, 1919 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at Supai, 1900 to 1986. Blue stripes are years cooler than the station's own mean of 16.4 C (61.6 F); red stripes are warmer. The coolest year was 1961, at 13.2 C (55.7 F), and the warmest was 1981, at 18.6 C (65.6 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Supai as warming stripes, 1900 to 1986
Year
Annual mean temperature
Difference from the station mean
1900
18.6 C
+2.13 C
1908
16.4 C
-0.05 C
1912
16.0 C
-0.46 C
1913
16.9 C
+0.45 C
1924
16.0 C
-0.48 C
1925
14.8 C
-1.65 C
1926
16.0 C
-0.41 C
1927
17.6 C
+1.16 C
1930
17.6 C
+1.20 C
1932
15.1 C
-1.34 C
1957
17.3 C
+0.85 C
1958
17.9 C
+1.42 C
1961
13.2 C
-3.27 C
1962
14.2 C
-2.23 C
1963
16.8 C
+0.35 C
1966
16.1 C
-0.30 C
1967
15.2 C
-1.24 C
1968
16.9 C
+0.44 C
1970
17.1 C
+0.71 C
1971
16.3 C
-0.12 C
1972
16.9 C
+0.47 C
1973
16.0 C
-0.44 C
1974
16.8 C
+0.33 C
1976
15.4 C
-1.04 C
1977
15.7 C
-0.70 C
1978
15.0 C
-1.46 C
1979
14.2 C
-2.22 C
1980
14.9 C
-1.55 C
1981
18.6 C
+2.21 C
1982
17.0 C
+0.52 C
1983
17.9 C
+1.50 C
1984
17.9 C
+1.43 C
1985
17.9 C
+1.50 C
1986
18.6 C
+2.19 C
The fitted trend in annual mean temperature here over 1900 to 1986 is 0.01 C (-0.18 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.33 to 0.35) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Supai
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.18 to 0.19) per decade
0.01 F (-0.33 to 0.35) per decade
1900 to 1986
34
Not clearly different from zero
Mean daily maximum
0.14 C (-0.04 to 0.31) per decade
0.2 F (-0.1 to 0.6) per decade
1900 to 1986
34
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.4 to 0.2) per decade
-0.2 F (-0.8 to 0.3) per decade
1900 to 1986
34
Not clearly different from zero
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
1899 to 1987
Yearly extremes at Supai: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1985
41.7 C (107.1 F)
62
Coldest night (TNn)
-20.0 C (-4.0 F)
1961
-7.8 C (18.0 F)
62
Wettest day (Rx1day)
115.6 mm (4.6 in)
1932
23.6 mm (0.9 in)
61
Wettest five days (Rx5day)
126.4 mm (5.0 in)
1931
34.1 mm (1.3 in)
60
Longest dry spell (CDD)
103 days
1972
53 days
61
Hottest day (TXx)
The hottest day of the year at Supai, 1899 to 1987. The record is 46.7 C (116.1 F) in 1985, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Supai by year
Year
Hottest day (TXx)
1899
43.9 C (111.0 F)
1900
46.1 C (115.0 F)
1901
44.4 C (111.9 F)
1907
20.6 C (69.1 F)
1908
39.4 C (102.9 F)
1909
41.1 C (106.0 F)
1911
41.7 C (107.1 F)
1912
41.1 C (106.0 F)
1913
43.3 C (109.9 F)
1914
42.2 C (108.0 F)
1915
39.4 C (102.9 F)
1916
28.3 C (82.9 F)
1917
38.3 C (100.9 F)
1918
40.0 C (104.0 F)
1919
18.3 C (64.9 F)
1920
39.4 C (102.9 F)
1921
40.0 C (104.0 F)
1922
42.2 C (108.0 F)
1923
42.2 C (108.0 F)
1924
41.1 C (106.0 F)
1925
39.4 C (102.9 F)
1926
41.1 C (106.0 F)
1927
44.4 C (111.9 F)
1928
42.2 C (108.0 F)
1929
38.9 C (102.0 F)
1930
42.8 C (109.0 F)
1931
38.9 C (102.0 F)
1932
42.2 C (108.0 F)
1933
28.9 C (84.0 F)
1934
40.6 C (105.1 F)
1956
40.6 C (105.1 F)
1957
41.1 C (106.0 F)
1958
41.7 C (107.1 F)
1959
42.2 C (108.0 F)
1960
42.2 C (108.0 F)
1961
41.1 C (106.0 F)
1962
41.7 C (107.1 F)
1963
41.7 C (107.1 F)
1964
40.6 C (105.1 F)
1965
40.6 C (105.1 F)
1966
40.6 C (105.1 F)
1967
43.3 C (109.9 F)
1968
42.8 C (109.0 F)
1969
42.8 C (109.0 F)
1970
43.9 C (111.0 F)
1971
43.9 C (111.0 F)
1972
42.8 C (109.0 F)
1973
41.7 C (107.1 F)
1974
42.8 C (109.0 F)
1975
42.2 C (108.0 F)
1976
41.1 C (106.0 F)
1977
41.1 C (106.0 F)
1978
41.7 C (107.1 F)
1979
41.1 C (106.0 F)
1980
42.2 C (108.0 F)
1981
44.4 C (111.9 F)
1982
41.7 C (107.1 F)
1983
41.7 C (107.1 F)
1984
41.1 C (106.0 F)
1985
46.7 C (116.1 F)
1986
43.9 C (111.0 F)
1987
21.1 C (70.0 F)
Coldest night (TNn)
The coldest night of the year at Supai, 1899 to 1987. The record is -20.0 C (-4.0 F) in 1961, marked on the chart; the median year is -7.8 C (18.0 F).
Coldest night (TNn) at Supai by year
Year
Coldest night (TNn)
1899
-3.3 C (26.1 F)
1900
-8.9 C (16.0 F)
1901
-9.4 C (15.1 F)
1907
-1.1 C (30.0 F)
1908
-4.4 C (24.1 F)
1909
-1.1 C (30.0 F)
1911
-4.4 C (24.1 F)
1912
-6.1 C (21.0 F)
1913
-11.7 C (10.9 F)
1914
-5.0 C (23.0 F)
1915
-4.4 C (24.1 F)
1916
-6.7 C (19.9 F)
1917
-7.8 C (18.0 F)
1918
-1.1 C (30.0 F)
1919
-11.1 C (12.0 F)
1920
-6.7 C (19.9 F)
1921
-3.3 C (26.1 F)
1922
-9.4 C (15.1 F)
1923
-9.4 C (15.1 F)
1924
-12.8 C (9.0 F)
1925
-7.8 C (18.0 F)
1926
-10.0 C (14.0 F)
1927
-5.6 C (21.9 F)
1928
-6.7 C (19.9 F)
1929
-6.1 C (21.0 F)
1930
-9.4 C (15.1 F)
1931
-17.8 C (0.0 F)
1932
-10.6 C (12.9 F)
1933
-14.4 C (6.1 F)
1934
-6.7 C (19.9 F)
1956
-6.1 C (21.0 F)
1957
-5.6 C (21.9 F)
1958
-4.4 C (24.1 F)
1959
-5.6 C (21.9 F)
1960
-12.2 C (10.0 F)
1961
-20.0 C (-4.0 F)
1962
-15.0 C (5.0 F)
1963
-18.3 C (-0.9 F)
1964
-8.9 C (16.0 F)
1965
-7.8 C (18.0 F)
1966
-12.8 C (9.0 F)
1967
-15.0 C (5.0 F)
1968
-12.2 C (10.0 F)
1969
-6.7 C (19.9 F)
1970
-5.0 C (23.0 F)
1971
-13.9 C (7.0 F)
1972
-11.7 C (10.9 F)
1973
-7.2 C (19.0 F)
1974
-10.6 C (12.9 F)
1975
-8.9 C (16.0 F)
1976
-11.1 C (12.0 F)
1977
-11.7 C (10.9 F)
1978
-13.3 C (8.1 F)
1979
-15.6 C (3.9 F)
1980
-8.9 C (16.0 F)
1981
-6.7 C (19.9 F)
1982
-6.7 C (19.9 F)
1983
-3.3 C (26.1 F)
1984
-5.0 C (23.0 F)
1985
-8.3 C (17.1 F)
1986
-5.0 C (23.0 F)
1987
-6.7 C (19.9 F)
Wettest day (Rx1day)
The wettest day of the year at Supai, 1899 to 1987. The record is 115.6 mm (4.6 in) in 1932, marked on the chart; the median year is 23.6 mm (0.9 in).
Wettest day (Rx1day) at Supai by year
Year
Wettest day (Rx1day)
1899
5.6 mm (0.22 in)
1900
19.1 mm (0.8 in)
1901
19.1 mm (0.8 in)
1907
0.0 mm (0.00 in)
1908
35.6 mm (1.4 in)
1909
38.1 mm (1.5 in)
1911
33.3 mm (1.3 in)
1912
16.5 mm (0.6 in)
1913
11.4 mm (0.4 in)
1914
17.3 mm (0.7 in)
1915
17.3 mm (0.7 in)
1916
13.2 mm (0.5 in)
1917
19.1 mm (0.8 in)
1918
45.7 mm (1.8 in)
1919
0.0 mm (0.00 in)
1920
20.6 mm (0.8 in)
1921
27.9 mm (1.1 in)
1922
17.8 mm (0.7 in)
1923
15.0 mm (0.6 in)
1924
24.9 mm (1.0 in)
1925
50.0 mm (2.0 in)
1926
21.8 mm (0.9 in)
1927
27.2 mm (1.1 in)
1928
40.6 mm (1.6 in)
1929
49.5 mm (1.9 in)
1930
24.6 mm (1.0 in)
1931
78.2 mm (3.1 in)
1932
115.6 mm (4.6 in)
1933
7.6 mm (0.30 in)
1934
n/a
1956
24.6 mm (1.0 in)
1957
27.2 mm (1.1 in)
1958
25.1 mm (1.0 in)
1959
36.8 mm (1.4 in)
1960
40.4 mm (1.6 in)
1961
17.3 mm (0.7 in)
1962
8.4 mm (0.33 in)
1963
34.3 mm (1.4 in)
1964
29.5 mm (1.2 in)
1965
18.8 mm (0.7 in)
1966
40.1 mm (1.6 in)
1967
23.1 mm (0.9 in)
1968
25.9 mm (1.0 in)
1969
35.6 mm (1.4 in)
1970
24.6 mm (1.0 in)
1971
15.2 mm (0.6 in)
1972
21.3 mm (0.8 in)
1973
18.3 mm (0.7 in)
1974
17.0 mm (0.7 in)
1975
32.3 mm (1.3 in)
1976
59.9 mm (2.4 in)
1977
15.5 mm (0.6 in)
1978
19.8 mm (0.8 in)
1979
28.4 mm (1.1 in)
1980
23.6 mm (0.9 in)
1981
34.0 mm (1.3 in)
1982
17.8 mm (0.7 in)
1983
18.0 mm (0.7 in)
1984
23.1 mm (0.9 in)
1985
25.7 mm (1.0 in)
1986
39.6 mm (1.6 in)
1987
23.4 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Supai, 1899 to 1987. The record is 126.4 mm (5.0 in) in 1931, marked on the chart; the median year is 34.1 mm (1.3 in).
Wettest five days (Rx5day) at Supai by year
Year
Wettest five days (Rx5day)
1899
5.6 mm (0.22 in)
1900
14.0 mm (0.6 in)
1901
29.3 mm (1.2 in)
1907
0.0 mm (0.00 in)
1908
45.8 mm (1.8 in)
1909
67.4 mm (2.7 in)
1911
52.6 mm (2.1 in)
1912
26.7 mm (1.1 in)
1913
16.7 mm (0.7 in)
1914
26.7 mm (1.1 in)
1915
30.2 mm (1.2 in)
1916
18.8 mm (0.7 in)
1917
29.9 mm (1.2 in)
1918
71.3 mm (2.8 in)
1919
0.0 mm (0.00 in)
1920
56.1 mm (2.2 in)
1921
41.7 mm (1.6 in)
1922
20.3 mm (0.8 in)
1923
n/a
1924
49.3 mm (1.9 in)
1925
78.7 mm (3.1 in)
1926
26.6 mm (1.0 in)
1927
38.1 mm (1.5 in)
1928
50.5 mm (2.0 in)
1929
49.5 mm (1.9 in)
1930
24.6 mm (1.0 in)
1931
126.4 mm (5.0 in)
1932
52.6 mm (2.1 in)
1933
7.6 mm (0.30 in)
1934
n/a
1956
56.1 mm (2.2 in)
1957
39.7 mm (1.6 in)
1958
33.8 mm (1.3 in)
1959
39.1 mm (1.5 in)
1960
41.4 mm (1.6 in)
1961
17.3 mm (0.7 in)
1962
17.0 mm (0.7 in)
1963
34.3 mm (1.4 in)
1964
29.5 mm (1.2 in)
1965
33.0 mm (1.3 in)
1966
40.2 mm (1.6 in)
1967
47.0 mm (1.9 in)
1968
33.3 mm (1.3 in)
1969
35.6 mm (1.4 in)
1970
52.8 mm (2.1 in)
1971
20.5 mm (0.8 in)
1972
53.9 mm (2.1 in)
1973
22.2 mm (0.9 in)
1974
34.8 mm (1.4 in)
1975
32.3 mm (1.3 in)
1976
59.9 mm (2.4 in)
1977
18.3 mm (0.7 in)
1978
45.7 mm (1.8 in)
1979
30.5 mm (1.2 in)
1980
23.6 mm (0.9 in)
1981
65.3 mm (2.6 in)
1982
30.1 mm (1.2 in)
1983
35.3 mm (1.4 in)
1984
44.2 mm (1.7 in)
1985
25.7 mm (1.0 in)
1986
39.6 mm (1.6 in)
1987
23.4 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Supai, 1899 to 1987. The record is 103 days in 1972, marked on the chart; the median year is 53 days.
Longest dry spell (CDD) at Supai by year
Year
Longest dry spell (CDD)
1899
34 days
1900
81 days
1901
74 days
1907
31 days
1908
61 days
1909
29 days
1911
77 days
1912
45 days
1913
89 days
1914
32 days
1915
45 days
1916
53 days
1917
55 days
1918
62 days
1919
31 days
1920
22 days
1921
30 days
1922
22 days
1923
3 days
1924
61 days
1925
36 days
1926
55 days
1927
35 days
1928
93 days
1929
61 days
1930
57 days
1931
53 days
1932
53 days
1933
20 days
1934
n/a
1956
71 days
1957
42 days
1958
62 days
1959
44 days
1960
90 days
1961
49 days
1962
54 days
1963
64 days
1964
48 days
1965
41 days
1966
48 days
1967
56 days
1968
41 days
1969
40 days
1970
82 days
1971
57 days
1972
103 days
1973
69 days
1974
95 days
1975
51 days
1976
53 days
1977
40 days
1978
69 days
1979
61 days
1980
46 days
1981
34 days
1982
63 days
1983
68 days
1984
68 days
1985
32 days
1986
62 days
1987
44 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Supai falls on 31 March and the median first autumn frost on 10 November, which leaves a median of 224 days between them.
Fitted over all years, the growing season changes by -5.9 days per decade at this station.
Frost dates and growing season at Supai
Measure
Median, all years
Earliest period
Recent period (1924 to 1986)
Recent against earliest
Fitted trend
Last spring frost
31 March
n/a
6 April
n/a
+4.1 days per decade
First autumn frost
10 November
n/a
6 November
n/a
-1.8 days per decade
Growing days
224 days
n/a
220 days
n/a
-5.9 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
39 years, 1908 to 1986
A day with at least 24.3 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 62.1 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Supai: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
24.3 mm (1.0 in)
5 years
33.9 mm (1.3 in)
10 years
40.4 mm (1.6 in)
25 years
48.9 mm (1.9 in)
50 years
55.4 mm (2.2 in)
Longer than the 39 years of record
100 years
62.1 mm (2.4 in)
Longer than the 39 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, 39 years of values from 1908 to 1986.
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: 59.9 mm (2.4 in) in 1976; 50.0 mm (2.0 in) in 1925; 40.4 mm (1.6 in) in 1960.
Download the Data
Data for Supai standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Supai 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.