National Weather Service United States Department of Commerce

100°+ occurrences for Tucson

Yearly 100°F+ statistics for Tucson (1895-2024)
 
Most 100°F+ in a year Least 100°F+ in a year
1) 108 days in 2020 1) 21 days in 1967
2) 99 / 1994 2T) 23 / 1897 & 1923
3) 93 / 1989 4T) 26 / 1964, 1965 & 1975
4) 89 / 2023 7) 28 / 1976
5) 78 / 1988 8T) 29 / 1921 & 1966
6T) 77 / 1991 & 1993 10T) 31 / 1913, 1982 & 1984
8) 76 / 1910  
9T) 75 / 1924, 2000 & 2003  
Monthly occurrence records | Plot of yearly totals
 
Month by month 100°F+ occurrences
as of July 17th
YEAR April May June July Aug. Sept. Oct. Total
Normal < 1 4 21 19 15 8 1 68
2024 0 5 29 16 0 0 0 50
2023 1 0 17 31 21 15 4 89
2022 1 5 24 21 7 8 0 66
2021 0 2 25 13 12 11 0 63
2020 2 10 23 25 26 14 8 108
2019 0 0 17 26 22 8 0 73
2018 0 6 23 20 11 11 0 71
2017 0 5 25 15 13 10 0 68
2016 0 0 22 25 10 4 0 61
2015 0 2 23 15 20 2 1 63
2014 0 7 29 16 9 4 0 65
2013 0 0 30 16 18 10 0 74
2012 2 7 28 10 20 6 0 73
2011 0 2 22 20 18 8 0 70
2010 0 1 22 18 15 16 2 74
2009 0 8 10 24 25 7 0 74
2008 0 2 20 12 12 4 0 50
2007 0 3 20 19 15 8 0 65
2006 0 2 26 19 2 1 0 50
2005 0 7 17 25 10 5 0 64
2004 0 0 19 20 8 6 0 53
2003 0 9 20 23 14 9 0 75
2002 0 4 24 17 16 6 0 67
2001 0 10 21 9 11 13 0 64
2000 0 11 14 21 14 15 0 75
1999 0 1 15 5 10 6 1 38
1998 0 0 14 17 13 6 0 50
1997 0 3 19 20 12 9 1 64
1996 0 7 23 22 8 0 1 61
1995 0 1 19 21 17 5 0 63
1994 0 4 27 27 30 11 0 99
1993 0 6 20 24 17 9 1 77
1992 4 0 22 18 15 11 0 70
1991 0 1 19 24 22 7 4 77
1990 0 1 24 13 6 7 0 51
1989 3 10 20 26 20 14 0 93
1988 0 12 25 21 16 4 0 78
1987 0 0 26 25 15 3 2 71
1986 0 7 22 16 16 5 0 66
1985 0 0 21 19 17 2 0 59
1984 0 9 9 7 5 1 0 31
1983 0 8 10 21 13 5 0 57
1982 0 0 7 11 8 5 0 31
1981 0 0 19 10 13 0 0 42
1980 0 1 23 22 8 3 1 58
1979 0 0 15 21 10 12 0 58
1978 0 3 20 21 3 0 0 47
1977 0 2 17 15 11 3 1 49
1976 0 0 12 9 7 0 0 28
1975 0 0 8 7 11 0 0 26
1974 0 3 21 7 2 1 0 34
1973 0 0 13 15 10 4 0 42
1972 0 0 9 19 5 0 0 33
1971 0 0 13 17 0 4 0 34
1970 0 2 13 15 7 2 0 39
1969 0 4 8 12 13 3 0 40
1968 0 3 17 11 0 4 0 35
1967 0 0 7 8 5 1 0 21
1966 0 1 13 13 2 0 0 29
1965 0 1 3 9 13 0 0 26
1964 0 1 8 15 2 0 0 26
1963 0 1 13 18 0 6 0 38
1962 0 0 8 8 22 7 0 45
1961 0 0 17 14 3 0 0 34
1960 0 3 18 15 9 3 0 48
1959 0 0 16 14 2 7 0 39
1958 0 8 16 17 6 4 0 51
1957 0 0 19 21 5 6 0 51
1956 0 2 21 13 13 15 0 64
1955 0 1 14 14 1 12 1 43
1954 0 0 11 15 4 9 0 39
1953 0 0 17 13 17 16 0 63
1952 0 0 19 13 13 13 0 58
1951 0 6 12 24 14 12 0 68
1950 0 0 15 8 11 2 0 36
1949 0 2 13 8 12 2 0 37
1948 0 2 19 20 13 8 0 62
1947 0 5 13 24 4 8 0 54
1946 0 0 28 13 5 4 0 50
1945 0 0 10 17 6 8 0 41
1944 0 1 10 22 17 4 0 54
1943 1 5 15 25 7 14 0 67
1942 0 3 20 28 12 6 0 69
1941 0 1 11 21 8 1 0 42
1940 0 0 12 18 12 3 0 45
1939 0 1 16 20 10 1 0 48
1938 0 3 14 15 11 3 0 46
1937 0 5 13 23 17 2 0 60
1936 0 2 23 18 7 1 0 51
1935 0 0 19 15 4 3 0 41
1934 0 9 10 21 6 9 3 58
1933 0 1 14 20 13 4 0 52
1932 0 1 15 12 11 13 0 52
1931 0 0 10 25 6 5 0 46
1930 0 0 12 13 17 9 0 51
1929 0 0 16 16 12 3 1 48
1928 0 2 15 23 7 11 2 60
1927 0 5 12 23 6 5 0 51
1926 0 2 14 18 17 4 0 55
1925 0 5 8 21 10 2 1 47
1924 0 1 24 21 19 10 0 75
1923 0 2 10 9 0 2 0 23
1922 0 6 20 16 11 6 0 59
1921 0 0 13 9 2 5 0 29
1920 0 1 10 28 7 4 0 50
1919 0 0 16 6 11 1 0 34
1918 0 0 23 19 10 11 0 63
1917 0 0 21 18 16 8 4 67
1916 0 0 19 13 6 2 0 40
1915 0 0 18 15 20 3 0 56
1914 0 2 14 8 14 0 0 38
1913 0 1 5 13 7 5 0 31
1912 0 3 17 8 9 3 0 40
1911 0 0 16 9 18 5 0 48
1910 1 7 22 19 18 8 1 76
1909 0 0 18 13 5 3 0 39
1908 0 0 21 13 1 5 0 40
1907 0 1 10 15 7 8 0 41
1906 0 0 20 20 5 2 0 47
1905 0 0 9 18 14 5 0 46
1904 0 0 14 18 2 0 0 34
1903 0 2 14 23 15 5 0 59
1902 0 0 21 15 8 4 0 48
1901 0 0 14 22 16 12 0 64
1900 0 3 20 26 14 1 0 64
1899 0 0 14 18 9 15 0 56
1898 0 0 11 14 13 4 0 42
1897 0 0 9 12 2 0 0 23
1896 0 5 15 10 10 1 0 41
1895 0 4 17 19 9 11 0 60
 
Monthly occurrence records
Month Most Least
April 4 in 1992 0 - many times
May 12 in 1988 0 - many times
June 30 in 2013 3 in 1965
July 31 in 2023 5 in 1999
August 30 in 1994 0 in 1923, 1963, 1968 & 1971
September 16 in 1953 & 2010 0 in 1996 (last of many times)
October 8 in 2020 0 - many times
 
Year-by-year listing of the 1st 100° occurrence in Tucson
1991-2020 normal period average date is May 18th
The historical average (1895-2024) date is May 24th
 
Year Date Year Date Year Date Year Date Year Date
2024 May 27 2019 June 9 2009 May 7 1999 May 28 1989 April 19
2023 April 30 2018 May 6 2008 May 19 1998 June 2 1988 May 11
2022 April 26 2017 May 4 2007 May 11 1997 May 29 1987 June 2
2021 May 13 2016 June 2 2006 May 21 1996 May 11 1986 May 19
2020 April 29 2015 May 30 2005 May 20 1995 May 21 1985 June 6
    2014 May 16 2004 June 1 1994 May 15 1984 May 9
    2013 June 1 2003 May 17 1993 May 11 1983 May 23
    2012 April 22 2002 May 13 1992 April 27 1982 June 10
    2011 May 27 2001 May 8 1991 May 25 1981 June 5
    2010 May 28 2000 May 14 1990 May 23 1980 May 20
 
Year Date Year Date Year Date Year Date Year Date
1979 June 12 1969 May 27 1959 June 9 1949 May 24 1939 May 29
1978 May 13 1968 May 27 1958 May 19 1948 May 16 1938 May 26
1977 May 30 1967 June 17 1957 June 1 1947 May 2 1937 May 13
1976 June 6 1966 May 25 1956 May 17 1946 June 3 1936 May 24
1975 June 2 1965 May 29 1955 May 29 1945 June 13 1935 June 4
1974 May 26 1964 May 24 1954 June 3 1944 May 13 1934 May 9
1973 June 6 1963 May 20 1953 June 11 1943 April 30 1933 May 29
1972 June 16 1962 June 19 1952 June 6 1942 May 20 1932 May 17
1971 June 15 1961 June 10 1951 May 25 1941 May 12 1931 June 14
1970 May 17 1960 May 11 1950 June 10 1940 June 2 1930 June 5
 
Year Date Year Date Year Date Year Date
1929 June 3 1919 June 6 1909 June 2 1899 June 9
1928 May 26 1918 June 2 1908 June 8 1898 N/A
1927 May 13 1917 June 8 1907 May 20 1897 June 6
1926 May 22 1916 June 8 1906 June 8 1896 May 24
1925 May 18 1915 June 8 1905 June 22 1895 May 7
1924 May 17 1914 May 21 1904 June 6    
1923 May 9 1913 May 23 1903 May 13    
1922 May 23 1912 May 25 1902 June 7    
1921 June 7 1911 June 4 1901 June 7    
1920 May 19 1910 April 27 1900 May 9    
 
  The 10 earliest 1st occurrences     The 10 latest 1st occurrences
1 April 19, 1989 1 June 22, 1905
2 April 22, 2012 2 June 19, 1962
3 April 26, 2022 3 June 17, 1967
4T April 27, 1910 4 June 16, 1972
April 27, 1992 5 June 15, 1971
6 April 29, 2020 6 June 14, 1931
7 April 30, 1943 7 June 13, 1945
8 May 2, 1947 8 June 12, 1979
9 May 4, 2017 9 June 11, 1953
10 May 6, 2018 10T June 10 in 1950, 1961 & 1982
 
1st 100° occurrences in Tucson by date
Dates # occurrences Year(s)
April 19 1 1989
April 22 1 2012
April 26 1 2022
April 27 2 1910, 1992
April 29 1 2020
April 30 1 1943, 2023
May 2 1 1947
May 4 1 2017
May 6 1 2018
May 7 2 1895, 2009
May 8 1 2001
May 9 4 1900, 1923, 1934, 1984
May 11 5 1960, 1988, 1993, 1996, 2007
May 12 1 1941
May 13 7 1903, 1927, 1937, 1944, 1978, 2002, 2021
May 14 1 2000
May 15 1 1994
May 16 2 1948, 2014
May 17 5 1924, 1932, 1956, 1970, 2003
May 18 1 1925
May 19 4 2008, 1986, 1958, 1920
May 20 5 2005, 1980, 1963, 1942, 1907
May 21 3 2006, 1995, 1914
May 22 1 1926
May 23 4 1990, 1983, 1922, 1913
May 24 4 1964, 1949, 1936, 1896
May 25 4 1991, 1966, 1951, 1912
May 26 3 1974, 1938, 1928
May 27 4 2024, 2011, 1969, 1968
May 28 2 2010, 1999
May 29 5 1997, 1965, 1955, 1939, 1933
May 30 1 2015, 1977
May 31 0 .
June 1 3 2013, 2004, 1957
June 2 7 2016, 1998, 1987, 1975, 1940, 1918, 1909
June 3 3 1954, 1946, 1929
June 4 2 1935, 1911
June 5 2 1981, 1930
June 6 7 1985, 1976, 1973, 1952, 1919, 1904, 1897
June 7 3 1921, 1902, 1901
June 8 5 1917, 1916, 1915, 1908, 1906
June 9 3 2019, 1959, 1899
June 10 3 1982, 1961, 1950
June 11 1 1953
June 12 1 1979
June 13 1 1945
June 14 1 1931
June 15 1 1971
June 16 1 1972
June 17 1 1967
June 19 1 1962
June 22 1 1905
 
Average 1st 100° occurrence by decade
1900s June 1 Latest occurrence (June 22, 1905)
1910s May 29 .
1920s May 22 .
1930s May 27 .
1940s May 20 .
1950s June 1 .
1960s May 30 .
1970s June 2 .
1980s May 22 Earliest occurrence (April 19, 1989)
1990s May 19 .
2000s May 16 .
2010s May 21  
2020s May 7 (5 yrs) .
 
1st 100° date plot for Tucson Arizona
 
Yearly plot of the 1st 100° date for Tucson Arizona
 
The above graph shows year-by-year plot of 1st 100 degree date
The Red dots are for the earliest 10 calendar occurrences while the Blue dots are for the latest 10 calendar occurrence
Blue line - Historical average (1895-2024) of 1st 100° date (May 24th)
Black line - 10-year moving average | Green line - Decadal average 1st date
 
Decadal averages
1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
6/1 5/29 5/22 5/27 5/20 6/1 5/30 6/2 5/22 5/19 5/16 5/21 5/7
 
  The 10 earliest 1st occurrences     The 10 latest 1st occurrences
1 April 19, 1989 1 June 22, 1905
2 April 22, 2012 2 June 19, 1962
3 April 26, 2022 3 June 17, 1967
4T April 27, 1910 4 June 16, 1972
April 27, 1992 5 June 15, 1971
6 April 29, 2020 6 June 14, 1931
7 April 30, 1943 7 June 13, 1945
7 April 30, 2023 8 June 12, 1979
9 May 2, 1947 9 June 11, 1953
10 May 4, 2017 10T June 10 in 1950, 1961 & 1982

 

Average date for cumulative 100°+ highs for Tucson
Averages based on 1991-2020 period
 
Occurrence Date Occurrence Date Occurrence Date
1st May 12 24 June 29 47 August 5
2 May 20 25 June 30 48 August 7
3 May 26 26 July 1 49 August 9
4 May 30 27 July 2 50th August 11
5 June 2 28 July 4 51 August 13
6 June 3 29 July 5 52 August 15
7 June 5 30th July 6 53 August 17
8 June 7 31 July 8 54 August 19
9 June 9 32 July 9 55 August 21
10 June 11 33 July 11 56 August 23
11th June 13 34 July 12 57 August 26
12 June 14 35 July 14 58 August 28
13 June 16 36 July 15 59 August 30
14 June 17 37 July 17 60th Setpember 1
15 June 18 38 July 19 61 September 3
16 June 19 39 July 20 62 September 5
17 June 21 40th July 22 63 September 8
18 June 22 41 July 24 64 September 12
19 June 23 42 July 26 65 September 16
20th June 24 43 July 28 66 September 21
21 June 25 44 July 30 67 September 18
22 June 26 45 August 1 68 October 16
23 June 27 46 August 3 .. ..
Consecutive day streaks of 100° or hotter for Tucson
..
Historical progression of longest consecutive day streak
 
Longest consecutive streaks of
100°s or greater
Longest consecutive streaks of
100°s or greater
by decade
Rank Days (Year/dates)
1 53 (2023 / June 16 to August 7)
2T 39: (2013 / June 1 - July 9)
39: (2005 / June 14 - July 22)
39: (1987 / June 6 - July 14)
5 37: (2007 / June 13 - July 19)
6T 33: (2024 / May 27 - June 28)
  33: (2002 / June 12 - July 14)
8 32: (1942 / June 13 - July 14)
9T 30: (1994 / July 31 - Aug. 29)
30: (1946 / June 3 - July 2)
30: (1936 / June 8 - July 7)
12 29: (1901 / June 22 - July 20)
13T 27: (2017 / June 14 - July 10)
27: (1989 / June 13 - July 9)
27: (1903 / June 17 - July 13)
16T 26: (2020 / July 26 - August 20)
26: (1948 / June 24 - July 19)
18 25: (1994 / June 22 - July 16)
19 24: (1924 / June 10 - July 3)
20 23: (1980 / June 8 - June 30)
 

The longest consecutive streak for 2024 has been 33 days (May 27 - June 28)

 
Since 1895, Tucson has recorded streaks of
21 days or longer 33 times.
 
Since 1895, Tucson has recorded streaks of
14 days or longer 84 times.
 
Since 1895, Tucson has recorded streaks of
10 days or longer 156 times.
2020s
Days Year/dates
53 2023 / June 16 - August 7
2010s
Days Year/dates
39 2013 / June 1 - July 9
2000s
Days Year/dates
39 2005 / June 14 - July 22
1990s
Days Year/dates
30 1994 / July 31 - Aug. 29
1980s
Days Year/dates
39 1987 / June 6 - July 14
1970s
Days Year/dates
22 1974 / June 10 - July 1
1960s
Days Year/dates
17 1960 / June 16 - July 2
1950s
Days Year/dates
19 1957 / June 18 - July 6
1940s
Days Year/dates
32 1942 / June 13 - July 14
1930s
Days Year/dates
30 1936 / June 8 - July 7
1920s
Days Year/dates
24 1924 / June 10 - July 3
1910s
Days Year/dates
22 1917 / June 12 - July 3
1900s
Days Year/dates
29 1901 / June 22 - July 20
1890s
Days Year/dates
19 1895 / June 20 - July 8
 
The listing below shows the historical progression of the record for number of consecutive days that Tucson has hit 100°s or greater since 1895
 
Streak record number of days Year (dates) Average high temperature during streak
19 1895 (June 20 - July 8) 103.2°
19 (tied) 1900 (June 15 - July 3) 103.6°
29 1901 (June 22 - July 20) 104.1°
30 1936 (June 8 - July 7) 102.6°
32 1942 (June 13 - July 14) 104.7°
39 1987 (June 7 - July 15) 105.0°
39 (tied) 2005 (June 14 - July 22) 106.2°
39 (tied) 2013 (June 1 - July 9) 105.1°
53 2023 (June 16 - August 7) 107.0°
 
The listing below shows the record number of consecutive days that Tucson has hit 100°s or greater since 1895 by MONTH
 
Month Record number of days Year (dates)
April 4 days 1992 (April 27-30)
May 8 days 1983 & 1984 (May 23-30)
June 30 days 2013 (June 1-30)
July 31 days 2023 (July 1-31)
August 29 days 1994 (August 1-29)
September 12 days 1955 (September 3-14)
October 7 days 2020 (October 1-7)
No data on this tab