Record envelope, standing records and threshold days for Chevelon Rs (USC00021574), Arizona, United States, with 47 years of record.
Key Facts for Chevelon Rs
Chevelon Rs (USC00021574) is a weather station in Arizona, United States at 34.54 latitude and -110.92 longitude, 2,135 m (7,006 ft) above sea level.
The station reports from 1959 to 2005, 47 years of record.
1,464 records set at Chevelon Rs still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chevelon Rs set a daily record precipitation of 38.1 mm (1.5 in) on 28 October 2004.
About the Station
Location: Arizona, United States, 34.54 latitude, -110.92 longitude.
Elevation: 2,135 m (7,006 ft).
Period of record: 1959 to 2005, 47 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 Chevelon Rs. 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 Chevelon Rs, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
20.6 C (69.1 F)
-24.4 C (-11.9 F)
n/a
n/a
Mar
22.2 C (72.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Apr
26.7 C (80.1 F)
-15.0 C (5.0 F)
n/a
n/a
May
31.1 C (88.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
2.8 C (37.0 F)
n/a
n/a
Aug
33.9 C (93.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
30.6 C (87.1 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Chevelon Rs still stand. 1971 holds the most, with 75.
Standing records at Chevelon Rs by the year they were set
Year set
Standing records
1959
27
1960
43
1961
27
1962
37
1963
33
1964
47
1965
49
1966
26
1967
43
1968
34
1969
30
1970
43
1971
75
1972
42
1973
31
1974
50
1975
38
1976
21
1977
20
1978
35
1979
49
1980
49
1981
28
1982
33
1983
26
1984
23
1985
33
1986
34
1987
27
1988
36
1989
52
1990
33
1991
20
1992
35
1993
18
1994
22
1995
37
1996
55
1997
15
1998
15
1999
13
2000
31
2001
18
2004
11
All-Time Record Progression
1 new records
1 all-time records were set at Chevelon Rs between 7 February 1989 and 7 February 1989. Each dot is a new record.
When Chevelon Rs set new all-time records
Date
Kind
Detail
1989-02-07
Record low maximum temperature
Record low maximum temperature -16.1 C (3.0 F)
Wettest Day of Each Month
Aug: 88.9 mm (3.5 in)
The wettest day on record for each calendar month at Chevelon Rs. The most was 88.9 mm (3.5 in) on 27 August 1971.
Record daily precipitation for each month at Chevelon Rs
Month
Record daily precipitation (mm)
Date
Jan
59.7 mm (2.4 in)
8 January 1993
Feb
49.0 mm (1.9 in)
20 February 1980
Mar
48.3 mm (1.9 in)
6 March 2000
Apr
31.8 mm (1.3 in)
22 April 1988
May
56.1 mm (2.2 in)
28 May 1981
Jun
24.6 mm (1.0 in)
22 June 1972
Jul
58.9 mm (2.3 in)
20 July 1998
Aug
88.9 mm (3.5 in)
27 August 1971
Sep
53.6 mm (2.1 in)
5 September 1970
Oct
53.3 mm (2.1 in)
19 October 1972
Nov
70.6 mm (2.8 in)
11 November 1978
Dec
70.1 mm (2.8 in)
18 December 1978
Period of Record Coverage
1959 to 2004
Complete yearUnder 90 percent of days
44 years of record at Chevelon Rs, 1959 to 2004. 18 years have data for under 90 percent of days and are left out of rankings: 1959, 1969, 1971, 1972, 1973, 1974, 1975, 1976 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at Chevelon Rs, 1960 to 1995. Blue stripes are years cooler than the station's own mean of 9.2 C (48.6 F); red stripes are warmer. The coolest year was 1964, at 8.2 C (46.8 F), and the warmest was 1981, at 10.5 C (51.0 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Chevelon Rs as warming stripes, 1960 to 1995
Year
Annual mean temperature
Difference from the station mean
1960
9.5 C
+0.29 C
1961
9.2 C
-0.01 C
1964
8.2 C
-1.01 C
1965
8.9 C
-0.29 C
1966
9.8 C
+0.56 C
1967
9.6 C
+0.41 C
1977
9.7 C
+0.51 C
1978
9.4 C
+0.14 C
1980
9.7 C
+0.46 C
1981
10.5 C
+1.31 C
1982
8.7 C
-0.50 C
1983
9.0 C
-0.22 C
1985
9.0 C
-0.18 C
1988
8.8 C
-0.42 C
1989
9.6 C
+0.42 C
1990
8.9 C
-0.35 C
1991
8.6 C
-0.59 C
1992
8.4 C
-0.81 C
1993
9.0 C
-0.18 C
1994
9.3 C
+0.03 C
1995
9.7 C
+0.49 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
1959 to 2005
Yearly extremes at Chevelon Rs: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1973
33.3 C (91.9 F)
44
Coldest night (TNn)
-29.4 C (-20.9 F)
1963
-17.8 C (0.0 F)
44
Wettest day (Rx1day)
88.9 mm (3.5 in)
1971
42.0 mm (1.7 in)
44
Wettest five days (Rx5day)
112.3 mm (4.4 in)
1971
62.0 mm (2.4 in)
44
Longest dry spell (CDD)
98 days
1999
45 days
44
Hottest day (TXx)
The hottest day of the year at Chevelon Rs, 1959 to 2005. The record is 35.6 C (96.1 F) in 1973, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Chevelon Rs by year
Year
Hottest day (TXx)
1959
34.4 C (93.9 F)
1960
35.0 C (95.0 F)
1961
35.0 C (95.0 F)
1962
33.3 C (91.9 F)
1963
35.0 C (95.0 F)
1964
32.8 C (91.0 F)
1965
31.1 C (88.0 F)
1966
33.9 C (93.0 F)
1967
33.9 C (93.0 F)
1968
32.8 C (91.0 F)
1969
33.3 C (91.9 F)
1970
35.0 C (95.0 F)
1971
34.4 C (93.9 F)
1972
34.4 C (93.9 F)
1973
35.6 C (96.1 F)
1974
33.3 C (91.9 F)
1975
32.8 C (91.0 F)
1976
33.3 C (91.9 F)
1977
32.2 C (90.0 F)
1978
32.8 C (91.0 F)
1979
35.0 C (95.0 F)
1980
33.9 C (93.0 F)
1981
33.9 C (93.0 F)
1982
31.7 C (89.1 F)
1983
33.3 C (91.9 F)
1984
32.8 C (91.0 F)
1985
35.0 C (95.0 F)
1986
31.7 C (89.1 F)
1987
31.7 C (89.1 F)
1988
31.1 C (88.0 F)
1989
34.4 C (93.9 F)
1990
33.3 C (91.9 F)
1991
32.2 C (90.0 F)
1992
30.0 C (86.0 F)
1993
32.2 C (90.0 F)
1994
34.4 C (93.9 F)
1995
34.4 C (93.9 F)
1996
32.8 C (91.0 F)
1997
32.2 C (90.0 F)
1998
33.9 C (93.0 F)
1999
32.2 C (90.0 F)
2000
34.4 C (93.9 F)
2001
32.8 C (91.0 F)
2004
30.0 C (86.0 F)
2005
n/a
Coldest night (TNn)
The coldest night of the year at Chevelon Rs, 1959 to 2005. The record is -29.4 C (-20.9 F) in 1963, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Chevelon Rs by year
Year
Coldest night (TNn)
1959
-14.4 C (6.1 F)
1960
-23.3 C (-9.9 F)
1961
-22.8 C (-9.0 F)
1962
-23.3 C (-9.9 F)
1963
-29.4 C (-20.9 F)
1964
-21.1 C (-6.0 F)
1965
-23.9 C (-11.0 F)
1966
-20.6 C (-5.1 F)
1967
-18.3 C (-0.9 F)
1968
-17.2 C (1.0 F)
1969
-17.2 C (1.0 F)
1970
-20.6 C (-5.1 F)
1971
-27.8 C (-18.0 F)
1972
-18.3 C (-0.9 F)
1973
-17.8 C (0.0 F)
1974
-17.8 C (0.0 F)
1975
-16.1 C (3.0 F)
1976
-21.7 C (-7.1 F)
1977
-16.7 C (1.9 F)
1978
-25.0 C (-13.0 F)
1979
-23.9 C (-11.0 F)
1980
-16.7 C (1.9 F)
1981
-14.4 C (6.1 F)
1982
-17.2 C (1.0 F)
1983
-17.8 C (0.0 F)
1984
-16.7 C (1.9 F)
1985
-24.4 C (-11.9 F)
1986
-17.8 C (0.0 F)
1987
-20.6 C (-5.1 F)
1988
-22.8 C (-9.0 F)
1989
-23.3 C (-9.9 F)
1990
-27.8 C (-18.0 F)
1991
-17.2 C (1.0 F)
1992
-18.9 C (-2.0 F)
1993
-16.1 C (3.0 F)
1994
-18.9 C (-2.0 F)
1995
-15.6 C (3.9 F)
1996
-16.7 C (1.9 F)
1997
-17.8 C (0.0 F)
1998
-16.1 C (3.0 F)
1999
-14.4 C (6.1 F)
2000
-15.0 C (5.0 F)
2001
-16.1 C (3.0 F)
2004
-6.7 C (19.9 F)
2005
n/a
Wettest day (Rx1day)
The wettest day of the year at Chevelon Rs, 1959 to 2005. The record is 88.9 mm (3.5 in) in 1971, marked on the chart; the median year is 42.0 mm (1.7 in).
Wettest day (Rx1day) at Chevelon Rs by year
Year
Wettest day (Rx1day)
1959
45.7 mm (1.8 in)
1960
23.6 mm (0.9 in)
1961
47.5 mm (1.9 in)
1962
29.0 mm (1.1 in)
1963
27.2 mm (1.1 in)
1964
48.0 mm (1.9 in)
1965
32.5 mm (1.3 in)
1966
49.8 mm (2.0 in)
1967
51.1 mm (2.0 in)
1968
25.1 mm (1.0 in)
1969
55.9 mm (2.2 in)
1970
53.6 mm (2.1 in)
1971
88.9 mm (3.5 in)
1972
53.3 mm (2.1 in)
1973
30.2 mm (1.2 in)
1974
28.7 mm (1.1 in)
1975
33.0 mm (1.3 in)
1976
43.4 mm (1.7 in)
1977
39.9 mm (1.6 in)
1978
70.6 mm (2.8 in)
1979
33.5 mm (1.3 in)
1980
49.0 mm (1.9 in)
1981
56.1 mm (2.2 in)
1982
36.8 mm (1.4 in)
1983
45.7 mm (1.8 in)
1984
62.5 mm (2.5 in)
1985
32.8 mm (1.3 in)
1986
22.9 mm (0.9 in)
1987
38.1 mm (1.5 in)
1988
43.7 mm (1.7 in)
1989
40.6 mm (1.6 in)
1990
35.3 mm (1.4 in)
1991
37.6 mm (1.5 in)
1992
46.7 mm (1.8 in)
1993
59.7 mm (2.4 in)
1994
26.2 mm (1.0 in)
1995
30.5 mm (1.2 in)
1996
43.9 mm (1.7 in)
1997
21.6 mm (0.9 in)
1998
58.9 mm (2.3 in)
1999
39.6 mm (1.6 in)
2000
48.3 mm (1.9 in)
2001
29.2 mm (1.1 in)
2004
46.5 mm (1.8 in)
2005
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Chevelon Rs, 1959 to 2005. The record is 112.3 mm (4.4 in) in 1971, marked on the chart; the median year is 62.0 mm (2.4 in).
Wettest five days (Rx5day) at Chevelon Rs by year
Year
Wettest five days (Rx5day)
1959
98.1 mm (3.9 in)
1960
55.3 mm (2.2 in)
1961
55.9 mm (2.2 in)
1962
46.5 mm (1.8 in)
1963
53.6 mm (2.1 in)
1964
80.0 mm (3.1 in)
1965
57.0 mm (2.2 in)
1966
69.3 mm (2.7 in)
1967
107.9 mm (4.2 in)
1968
37.8 mm (1.5 in)
1969
61.2 mm (2.4 in)
1970
62.8 mm (2.5 in)
1971
112.3 mm (4.4 in)
1972
81.1 mm (3.2 in)
1973
59.9 mm (2.4 in)
1974
64.0 mm (2.5 in)
1975
59.0 mm (2.3 in)
1976
68.0 mm (2.7 in)
1977
50.1 mm (2.0 in)
1978
108.4 mm (4.3 in)
1979
51.5 mm (2.0 in)
1980
60.7 mm (2.4 in)
1981
73.8 mm (2.9 in)
1982
66.5 mm (2.6 in)
1983
97.6 mm (3.8 in)
1984
85.9 mm (3.4 in)
1985
57.7 mm (2.3 in)
1986
48.3 mm (1.9 in)
1987
87.4 mm (3.4 in)
1988
48.3 mm (1.9 in)
1989
31.7 mm (1.2 in)
1990
46.1 mm (1.8 in)
1991
82.0 mm (3.2 in)
1992
95.0 mm (3.7 in)
1993
105.7 mm (4.2 in)
1994
38.7 mm (1.5 in)
1995
49.7 mm (2.0 in)
1996
72.3 mm (2.8 in)
1997
32.8 mm (1.3 in)
1998
109.5 mm (4.3 in)
1999
49.9 mm (2.0 in)
2000
65.3 mm (2.6 in)
2001
52.8 mm (2.1 in)
2004
79.7 mm (3.1 in)
2005
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Chevelon Rs, 1959 to 2005. The record is 98 days in 1999, marked on the chart; the median year is 45 days.
Longest dry spell (CDD) at Chevelon Rs by year
Year
Longest dry spell (CDD)
1959
36 days
1960
45 days
1961
49 days
1962
33 days
1963
66 days
1964
45 days
1965
29 days
1966
60 days
1967
41 days
1968
52 days
1969
59 days
1970
56 days
1971
43 days
1972
60 days
1973
49 days
1974
50 days
1975
41 days
1976
44 days
1977
49 days
1978
63 days
1979
31 days
1980
50 days
1981
43 days
1982
54 days
1983
24 days
1984
38 days
1985
32 days
1986
30 days
1987
19 days
1988
55 days
1989
49 days
1990
32 days
1991
63 days
1992
32 days
1993
36 days
1994
25 days
1995
39 days
1996
56 days
1997
41 days
1998
53 days
1999
98 days
2000
60 days
2001
31 days
2004
31 days
2005
n/a
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
21 years with a frost
Across 21 years with a frost, the median last spring frost at Chevelon Rs falls on 31 May and the median first autumn frost on 12 October, which leaves a median of 135 days between them.
Frost dates and growing season at Chevelon Rs
Measure
Median, all years
Earliest period
Recent period (1960 to 1995)
Recent against earliest
Fitted trend
Last spring frost
31 May
n/a
31 May
n/a
n/a
First autumn frost
12 October
n/a
12 October
n/a
n/a
Growing days
135 days
n/a
135 days
n/a
n/a
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
34 years, 1960 to 2001
A day with at least 40.1 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 85.5 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Chevelon Rs: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.1 mm (1.6 in)
5 years
52.6 mm (2.1 in)
10 years
60.8 mm (2.4 in)
25 years
70.9 mm (2.8 in)
50 years
78.3 mm (3.1 in)
Longer than the 34 years of record
100 years
85.5 mm (3.4 in)
Longer than the 34 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, 34 years of values from 1960 to 2001.
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: 88.9 mm (3.5 in) in 1971; 70.6 mm (2.8 in) in 1978; 59.7 mm (2.4 in) in 1993.
Download the Data
Data for Chevelon Rs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chevelon Rs 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.