Record envelope, standing records and threshold days for Blue (USC00020855), Arizona, United States, with 87 years of record.
Key Facts for Blue
Blue (USC00020855) is a weather station in Arizona, United States at 33.58 latitude and -109.17 longitude, 1,652 m (5,420 ft) above sea level.
The station reports from 1903 to 1989, 87 years of record.
1,464 records set at Blue still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Blue set a daily record high minimum temperature of 15.6 C (60.1 F) on 16 August 1989.
About the Station
Location: Arizona, United States, 33.58 latitude, -109.17 longitude.
Elevation: 1,652 m (5,420 ft).
Period of record: 1903 to 1989, 87 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 Blue. 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 Blue, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Feb
31.7 C (89.1 F)
-20.0 C (-4.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-16.1 C (3.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-11.1 C (12.0 F)
n/a
n/a
May
38.9 C (102.0 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
1.7 C (35.1 F)
n/a
n/a
Aug
38.3 C (100.9 F)
3.3 C (37.9 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-17.2 C (1.0 F)
n/a
n/a
Dec
23.9 C (75.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Blue still stand. 1905 holds the most, with 78.
Standing records at Blue by the year they were set
Year set
Standing records
1903
3
1904
43
1905
78
1906
64
1959
6
1960
42
1961
30
1962
65
1963
37
1964
46
1965
49
1966
37
1967
39
1968
47
1969
54
1970
51
1971
77
1972
48
1973
44
1974
38
1975
41
1976
20
1977
40
1978
22
1979
27
1980
75
1981
61
1982
29
1983
37
1984
37
1985
28
1986
24
1987
39
1988
44
1989
42
All-Time Record Progression
4 new records
4 all-time records were set at Blue between 1 August 1965 and 19 October 1972. Each dot is a new record.
When Blue set new all-time records
Date
Kind
Detail
1965-08-01
Record daily precipitation
Record daily precipitation 76.2 mm (3.0 in)
1967-12-15
Record daily snowfall
Record daily snowfall 50.8 cm (20.0 in)
1967-12-18
Record snow depth
Record snow depth 106.7 cm (42.0 in)
1972-10-19
Record daily precipitation
Record daily precipitation 111.8 mm (4.4 in)
Wettest Day of Each Month
Oct: 111.8 mm (4.4 in)
The wettest day on record for each calendar month at Blue. The most was 111.8 mm (4.4 in) on 19 October 1972.
Record daily precipitation for each month at Blue
Month
Record daily precipitation (mm)
Date
Jan
63.5 mm (2.5 in)
10 January 1905
Feb
51.1 mm (2.0 in)
26 February 1915
Mar
53.3 mm (2.1 in)
10 March 1912
Apr
31.5 mm (1.2 in)
16 April 1988
May
24.4 mm (1.0 in)
5 May 1969
Jun
46.2 mm (1.8 in)
24 June 1925
Jul
58.4 mm (2.3 in)
25 July 1928
Aug
76.2 mm (3.0 in)
1 August 1965
Sep
67.8 mm (2.7 in)
30 September 1983
Oct
111.8 mm (4.4 in)
19 October 1972
Nov
43.7 mm (1.7 in)
27 November 1905
Dec
61.0 mm (2.4 in)
15 December 1967
Period of Record Coverage
1903 to 1989
Complete yearUnder 90 percent of days
35 years of record at Blue, 1903 to 1989. 7 years have data for under 90 percent of days and are left out of rankings: 1903, 1959, 1978, 1979, 1985, 1986, 1989.
Cooler than the station meanWarmer than the station mean
One stripe for each of 26 complete years at Blue, 1904 to 1988. Blue stripes are years cooler than the station's own mean of 11.2 C (52.2 F); red stripes are warmer. The coolest year was 1981, at 10.4 C (50.8 F), and the warmest was 1977, at 12.4 C (54.2 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Blue as warming stripes, 1904 to 1988
Year
Annual mean temperature
Difference from the station mean
1904
12.2 C
+0.96 C
1905
11.6 C
+0.31 C
1960
11.5 C
+0.22 C
1961
11.2 C
-0.04 C
1962
11.5 C
+0.30 C
1963
11.5 C
+0.25 C
1964
10.5 C
-0.75 C
1965
11.0 C
-0.22 C
1966
11.3 C
+0.03 C
1967
11.2 C
-0.07 C
1968
10.5 C
-0.79 C
1969
11.5 C
+0.25 C
1970
10.7 C
-0.59 C
1971
10.7 C
-0.57 C
1972
11.3 C
+0.01 C
1974
10.8 C
-0.43 C
1975
10.6 C
-0.67 C
1976
11.4 C
+0.18 C
1977
12.4 C
+1.11 C
1980
10.9 C
-0.34 C
1981
10.4 C
-0.82 C
1982
11.5 C
+0.27 C
1983
11.4 C
+0.12 C
1984
11.3 C
+0.07 C
1987
11.6 C
+0.40 C
1988
12.2 C
+0.93 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1903 to 1989
Yearly extremes at Blue: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1906
37.8 C (100.0 F)
35
Coldest night (TNn)
-22.8 C (-9.0 F)
1971
-17.2 C (1.0 F)
35
Wettest day (Rx1day)
111.8 mm (4.4 in)
1972
40.6 mm (1.6 in)
58
Wettest five days (Rx5day)
213.6 mm (8.4 in)
1983
67.7 mm (2.7 in)
58
Longest dry spell (CDD)
149 days
1972
46 days
58
Hottest day (TXx)
The hottest day of the year at Blue, 1903 to 1989. The record is 40.6 C (105.1 F) in 1906, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Blue by year
Year
Hottest day (TXx)
1903
22.2 C (72.0 F)
1904
40.0 C (104.0 F)
1905
39.4 C (102.9 F)
1906
40.6 C (105.1 F)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1959
28.9 C (84.0 F)
1960
38.9 C (102.0 F)
1961
38.9 C (102.0 F)
1962
36.7 C (98.1 F)
1963
37.8 C (100.0 F)
1964
37.8 C (100.0 F)
1965
36.1 C (97.0 F)
1966
40.0 C (104.0 F)
1967
38.3 C (100.9 F)
1968
38.3 C (100.9 F)
1969
40.0 C (104.0 F)
1970
40.6 C (105.1 F)
1971
39.4 C (102.9 F)
1972
38.9 C (102.0 F)
1973
39.4 C (102.9 F)
1974
38.3 C (100.9 F)
1975
37.2 C (99.0 F)
1976
36.7 C (98.1 F)
1977
36.7 C (98.1 F)
1978
37.2 C (99.0 F)
1979
38.3 C (100.9 F)
1980
37.8 C (100.0 F)
1981
35.0 C (95.0 F)
1982
36.7 C (98.1 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
37.8 C (100.0 F)
1986
36.1 C (97.0 F)
1987
36.1 C (97.0 F)
1988
33.9 C (93.0 F)
1989
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Blue, 1903 to 1989. The record is -22.8 C (-9.0 F) in 1971, marked on the chart; the median year is -17.2 C (1.0 F).
Coldest night (TNn) at Blue by year
Year
Coldest night (TNn)
1903
-12.8 C (9.0 F)
1904
-15.6 C (3.9 F)
1905
-17.2 C (1.0 F)
1906
-17.2 C (1.0 F)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1959
-12.2 C (10.0 F)
1960
-21.1 C (-6.0 F)
1961
-13.9 C (7.0 F)
1962
-17.8 C (0.0 F)
1963
-19.4 C (-2.9 F)
1964
-19.4 C (-2.9 F)
1965
-20.0 C (-4.0 F)
1966
-17.2 C (1.0 F)
1967
-19.4 C (-2.9 F)
1968
-21.7 C (-7.1 F)
1969
-20.6 C (-5.1 F)
1970
-19.4 C (-2.9 F)
1971
-22.8 C (-9.0 F)
1972
-16.7 C (1.9 F)
1973
-17.8 C (0.0 F)
1974
-20.6 C (-5.1 F)
1975
-15.6 C (3.9 F)
1976
-20.0 C (-4.0 F)
1977
-15.6 C (3.9 F)
1978
-13.9 C (7.0 F)
1979
-13.3 C (8.1 F)
1980
-13.9 C (7.0 F)
1981
-16.1 C (3.0 F)
1982
-15.0 C (5.0 F)
1983
-12.2 C (10.0 F)
1984
-12.2 C (10.0 F)
1985
-17.2 C (1.0 F)
1986
-10.6 C (12.9 F)
1987
-17.8 C (0.0 F)
1988
-14.4 C (6.1 F)
1989
-12.8 C (9.0 F)
Wettest day (Rx1day)
The wettest day of the year at Blue, 1903 to 1989. The record is 111.8 mm (4.4 in) in 1972, marked on the chart; the median year is 40.6 mm (1.6 in).
Wettest day (Rx1day) at Blue by year
Year
Wettest day (Rx1day)
1903
5.1 mm (0.20 in)
1904
31.2 mm (1.2 in)
1905
63.5 mm (2.5 in)
1906
43.2 mm (1.7 in)
1908
57.7 mm (2.3 in)
1909
26.4 mm (1.0 in)
1910
34.8 mm (1.4 in)
1911
40.6 mm (1.6 in)
1912
53.3 mm (2.1 in)
1913
35.6 mm (1.4 in)
1914
63.5 mm (2.5 in)
1915
51.1 mm (2.0 in)
1916
46.0 mm (1.8 in)
1917
29.2 mm (1.1 in)
1918
35.6 mm (1.4 in)
1919
59.4 mm (2.3 in)
1920
29.0 mm (1.1 in)
1921
33.3 mm (1.3 in)
1922
41.1 mm (1.6 in)
1923
25.7 mm (1.0 in)
1924
42.2 mm (1.7 in)
1925
53.8 mm (2.1 in)
1926
26.9 mm (1.1 in)
1927
50.0 mm (2.0 in)
1928
58.4 mm (2.3 in)
1929
39.6 mm (1.6 in)
1930
27.9 mm (1.1 in)
1959
41.7 mm (1.6 in)
1960
43.2 mm (1.7 in)
1961
44.5 mm (1.8 in)
1962
71.1 mm (2.8 in)
1963
38.1 mm (1.5 in)
1964
38.1 mm (1.5 in)
1965
76.2 mm (3.0 in)
1966
26.7 mm (1.1 in)
1967
61.0 mm (2.4 in)
1968
45.7 mm (1.8 in)
1969
55.9 mm (2.2 in)
1970
31.0 mm (1.2 in)
1971
49.0 mm (1.9 in)
1972
111.8 mm (4.4 in)
1973
27.9 mm (1.1 in)
1974
30.5 mm (1.2 in)
1975
49.5 mm (1.9 in)
1976
33.0 mm (1.3 in)
1977
26.7 mm (1.1 in)
1978
21.1 mm (0.8 in)
1979
29.0 mm (1.1 in)
1980
32.5 mm (1.3 in)
1981
23.1 mm (0.9 in)
1982
35.6 mm (1.4 in)
1983
67.8 mm (2.7 in)
1984
44.5 mm (1.8 in)
1985
55.9 mm (2.2 in)
1986
45.7 mm (1.8 in)
1987
33.3 mm (1.3 in)
1988
40.6 mm (1.6 in)
1989
25.9 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Blue, 1903 to 1989. The record is 213.6 mm (8.4 in) in 1983, marked on the chart; the median year is 67.7 mm (2.7 in).
Wettest five days (Rx5day) at Blue by year
Year
Wettest five days (Rx5day)
1903
5.1 mm (0.20 in)
1904
43.9 mm (1.7 in)
1905
81.8 mm (3.2 in)
1906
62.0 mm (2.4 in)
1908
75.7 mm (3.0 in)
1909
46.2 mm (1.8 in)
1910
64.8 mm (2.6 in)
1911
57.1 mm (2.2 in)
1912
68.0 mm (2.7 in)
1913
64.3 mm (2.5 in)
1914
81.0 mm (3.2 in)
1915
112.8 mm (4.4 in)
1916
105.6 mm (4.2 in)
1917
47.2 mm (1.9 in)
1918
56.0 mm (2.2 in)
1919
80.2 mm (3.2 in)
1920
42.6 mm (1.7 in)
1921
57.9 mm (2.3 in)
1922
66.7 mm (2.6 in)
1923
54.4 mm (2.1 in)
1924
59.2 mm (2.3 in)
1925
92.9 mm (3.7 in)
1926
52.8 mm (2.1 in)
1927
88.9 mm (3.5 in)
1928
88.9 mm (3.5 in)
1929
76.5 mm (3.0 in)
1930
50.8 mm (2.0 in)
1959
89.6 mm (3.5 in)
1960
52.1 mm (2.1 in)
1961
67.9 mm (2.7 in)
1962
117.3 mm (4.6 in)
1963
94.0 mm (3.7 in)
1964
87.1 mm (3.4 in)
1965
95.2 mm (3.7 in)
1966
48.5 mm (1.9 in)
1967
150.6 mm (5.9 in)
1968
78.2 mm (3.1 in)
1969
99.9 mm (3.9 in)
1970
55.9 mm (2.2 in)
1971
92.2 mm (3.6 in)
1972
204.5 mm (8.1 in)
1973
70.1 mm (2.8 in)
1974
52.9 mm (2.1 in)
1975
108.5 mm (4.3 in)
1976
67.4 mm (2.7 in)
1977
62.8 mm (2.5 in)
1978
48.2 mm (1.9 in)
1979
47.3 mm (1.9 in)
1980
89.4 mm (3.5 in)
1981
49.0 mm (1.9 in)
1982
56.9 mm (2.2 in)
1983
213.6 mm (8.4 in)
1984
99.1 mm (3.9 in)
1985
61.0 mm (2.4 in)
1986
76.2 mm (3.0 in)
1987
74.3 mm (2.9 in)
1988
63.7 mm (2.5 in)
1989
40.4 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Blue, 1903 to 1989. The record is 149 days in 1972, marked on the chart; the median year is 46 days.
Longest dry spell (CDD) at Blue by year
Year
Longest dry spell (CDD)
1903
36 days
1904
59 days
1905
35 days
1906
51 days
1908
37 days
1909
94 days
1910
39 days
1911
68 days
1912
54 days
1913
41 days
1914
53 days
1915
36 days
1916
71 days
1917
104 days
1918
46 days
1919
30 days
1920
34 days
1921
31 days
1922
24 days
1923
51 days
1924
43 days
1925
52 days
1926
48 days
1927
35 days
1928
43 days
1929
40 days
1930
46 days
1959
34 days
1960
41 days
1961
62 days
1962
60 days
1963
40 days
1964
44 days
1965
36 days
1966
76 days
1967
41 days
1968
40 days
1969
57 days
1970
59 days
1971
62 days
1972
149 days
1973
87 days
1974
64 days
1975
37 days
1976
32 days
1977
49 days
1978
29 days
1979
35 days
1980
49 days
1981
55 days
1982
47 days
1983
37 days
1984
71 days
1985
20 days
1986
50 days
1987
22 days
1988
47 days
1989
53 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
26 years with a frost
Across 26 years with a frost, the median last spring frost at Blue falls on 3 June and the median first autumn frost on 7 October, which leaves a median of 127 days between them.
Fitted over all years, the growing season changes by -2.0 days per decade at this station.
Frost dates and growing season at Blue
Measure
Median, all years
Earliest period
Recent period (1904 to 1988)
Recent against earliest
Fitted trend
Last spring frost
3 June
n/a
3 June
n/a
+2.6 days per decade
First autumn frost
7 October
n/a
7 October
n/a
+0.6 days per decade
Growing days
127 days
n/a
127 days
n/a
-2.0 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
50 years, 1904 to 1988
A day with at least 40.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 102.3 mm (4.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Blue: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.6 mm (1.6 in)
5 years
54.6 mm (2.1 in)
10 years
64.8 mm (2.6 in)
25 years
78.9 mm (3.1 in)
50 years
90.2 mm (3.6 in)
100 years
102.3 mm (4.0 in)
Longer than the 50 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, 50 years of values from 1904 to 1988.
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: 111.8 mm (4.4 in) in 1972; 76.2 mm (3.0 in) in 1965; 71.1 mm (2.8 in) in 1962.
Download the Data
Data for Blue standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Blue 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.