Record envelope, standing records and threshold days for Groom Creek (USC00023713), Arizona, United States, with 60 years of record.
Key Facts for Groom Creek
Groom Creek (USC00023713) is a weather station in Arizona, United States at 34.48 latitude and -112.45 longitude, 1,861 m (6,106 ft) above sea level.
The station reports from 1917 to 1976, 60 years of record.
1,464 records set at Groom Creek still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Groom Creek set a daily record low minimum temperature of -10.0 C (14.0 F) on 17 April 1976.
About the Station
Location: Arizona, United States, 34.48 latitude, -112.45 longitude.
Elevation: 1,861 m (6,106 ft).
Period of record: 1917 to 1976, 60 years.
Eligible elements: tmax, tmin, prcp.
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 Groom Creek. 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 Groom Creek, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
21.7 C (71.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Groom Creek still stand. 1948 holds the most, with 92.
Standing records at Groom Creek by the year they were set
Year set
Standing records
1942
45
1943
38
1944
53
1945
80
1946
61
1947
37
1948
92
1949
49
1950
70
1951
33
1952
33
1953
45
1954
25
1955
80
1956
41
1957
42
1958
39
1959
30
1960
46
1961
35
1962
39
1963
35
1964
36
1965
56
1966
38
1967
27
1968
31
1969
30
1970
21
1971
55
1972
35
1973
22
1974
23
1975
28
1976
14
Wettest Day of Each Month
Sep: 108.0 mm (4.3 in)
The wettest day on record for each calendar month at Groom Creek. The most was 108.0 mm (4.3 in) on 5 September 1970.
Record daily precipitation for each month at Groom Creek
Month
Record daily precipitation (mm)
Date
Jan
88.9 mm (3.5 in)
24 January 1943
Feb
66.8 mm (2.6 in)
9 February 1976
Mar
77.7 mm (3.1 in)
1 March 1970
Apr
58.4 mm (2.3 in)
17 April 1917
May
38.1 mm (1.5 in)
1 May 1973
Jun
43.2 mm (1.7 in)
13 June 1955
Jul
81.0 mm (3.2 in)
28 July 1969
Aug
84.6 mm (3.3 in)
4 August 1970
Sep
108.0 mm (4.3 in)
5 September 1970
Oct
48.3 mm (1.9 in)
19 October 1972
Nov
91.4 mm (3.6 in)
23 November 1965
Dec
97.8 mm (3.9 in)
26 December 1966
Period of Record Coverage
1942 to 1976
Complete yearUnder 90 percent of days
35 years of record at Groom Creek, 1942 to 1976. 11 years have data for under 90 percent of days and are left out of rankings: 1942, 1947, 1948, 1949, 1950, 1967, 1970, 1972 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at Groom Creek, 1943 to 1973. Blue stripes are years cooler than the station's own mean of 10.1 C (50.1 F); red stripes are warmer. The coolest year was 1955, at 9.0 C (48.3 F), and the warmest was 1943, at 10.9 C (51.7 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Groom Creek as warming stripes, 1943 to 1973
Year
Annual mean temperature
Difference from the station mean
1943
10.9 C
+0.87 C
1951
9.9 C
-0.19 C
1952
9.7 C
-0.35 C
1953
9.7 C
-0.40 C
1954
10.2 C
+0.16 C
1955
9.0 C
-1.04 C
1956
10.4 C
+0.37 C
1957
9.8 C
-0.30 C
1958
10.3 C
+0.26 C
1959
10.3 C
+0.21 C
1960
10.1 C
+0.04 C
1961
10.2 C
+0.14 C
1962
10.2 C
+0.15 C
1963
10.3 C
+0.19 C
1964
9.3 C
-0.80 C
1965
10.1 C
-0.01 C
1966
10.8 C
+0.74 C
1968
10.2 C
+0.11 C
1969
10.3 C
+0.27 C
1971
9.6 C
-0.43 C
1973
10.1 C
-0.02 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
1917 to 1976
Yearly extremes at Groom Creek: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1944
35.0 C (95.0 F)
35
Coldest night (TNn)
-22.2 C (-8.0 F)
1963
-16.7 C (1.9 F)
35
Wettest day (Rx1day)
108.0 mm (4.3 in)
1970
47.7 mm (1.9 in)
36
Wettest five days (Rx5day)
164.1 mm (6.5 in)
1976
87.4 mm (3.4 in)
36
Longest dry spell (CDD)
97 days
1972
52 days
36
Hottest day (TXx)
The hottest day of the year at Groom Creek, 1917 to 1976. The record is 40.0 C (104.0 F) in 1944, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Groom Creek by year
Year
Hottest day (TXx)
1917
n/a
1942
34.4 C (93.9 F)
1943
35.6 C (96.1 F)
1944
40.0 C (104.0 F)
1945
36.7 C (98.1 F)
1946
33.9 C (93.0 F)
1947
35.0 C (95.0 F)
1948
36.1 C (97.0 F)
1949
33.9 C (93.0 F)
1950
36.7 C (98.1 F)
1951
34.4 C (93.9 F)
1952
32.8 C (91.0 F)
1953
35.0 C (95.0 F)
1954
35.6 C (96.1 F)
1955
35.0 C (95.0 F)
1956
35.6 C (96.1 F)
1957
34.4 C (93.9 F)
1958
36.1 C (97.0 F)
1959
34.4 C (93.9 F)
1960
36.7 C (98.1 F)
1961
36.1 C (97.0 F)
1962
33.9 C (93.0 F)
1963
33.3 C (91.9 F)
1964
33.9 C (93.0 F)
1965
32.2 C (90.0 F)
1966
32.8 C (91.0 F)
1967
35.0 C (95.0 F)
1968
33.9 C (93.0 F)
1969
35.0 C (95.0 F)
1970
36.7 C (98.1 F)
1971
36.1 C (97.0 F)
1972
36.1 C (97.0 F)
1973
36.7 C (98.1 F)
1974
35.0 C (95.0 F)
1975
31.1 C (88.0 F)
1976
24.4 C (75.9 F)
Coldest night (TNn)
The coldest night of the year at Groom Creek, 1917 to 1976. The record is -22.2 C (-8.0 F) in 1963, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Groom Creek by year
Year
Coldest night (TNn)
1917
n/a
1942
-11.7 C (10.9 F)
1943
-12.8 C (9.0 F)
1944
-15.6 C (3.9 F)
1945
-18.9 C (-2.0 F)
1946
-17.2 C (1.0 F)
1947
-15.6 C (3.9 F)
1948
-16.1 C (3.0 F)
1949
-21.1 C (-6.0 F)
1950
-17.2 C (1.0 F)
1951
-16.1 C (3.0 F)
1952
-16.7 C (1.9 F)
1953
-16.1 C (3.0 F)
1954
-17.2 C (1.0 F)
1955
-21.7 C (-7.1 F)
1956
-15.0 C (5.0 F)
1957
-16.7 C (1.9 F)
1958
-16.1 C (3.0 F)
1959
-13.3 C (8.1 F)
1960
-21.1 C (-6.0 F)
1961
-18.9 C (-2.0 F)
1962
-20.6 C (-5.1 F)
1963
-22.2 C (-8.0 F)
1964
-16.7 C (1.9 F)
1965
-17.8 C (0.0 F)
1966
-17.8 C (0.0 F)
1967
-13.3 C (8.1 F)
1968
-19.4 C (-2.9 F)
1969
-12.8 C (9.0 F)
1970
-15.0 C (5.0 F)
1971
-20.6 C (-5.1 F)
1972
-12.8 C (9.0 F)
1973
-15.0 C (5.0 F)
1974
-18.9 C (-2.0 F)
1975
-15.6 C (3.9 F)
1976
-15.6 C (3.9 F)
Wettest day (Rx1day)
The wettest day of the year at Groom Creek, 1917 to 1976. The record is 108.0 mm (4.3 in) in 1970, marked on the chart; the median year is 47.7 mm (1.9 in).
Wettest day (Rx1day) at Groom Creek by year
Year
Wettest day (Rx1day)
1917
58.4 mm (2.3 in)
1942
15.2 mm (0.6 in)
1943
88.9 mm (3.5 in)
1944
44.5 mm (1.8 in)
1945
63.5 mm (2.5 in)
1946
61.0 mm (2.4 in)
1947
45.7 mm (1.8 in)
1948
59.7 mm (2.4 in)
1949
45.7 mm (1.8 in)
1950
26.9 mm (1.1 in)
1951
64.8 mm (2.6 in)
1952
44.5 mm (1.8 in)
1953
40.6 mm (1.6 in)
1954
40.6 mm (1.6 in)
1955
43.7 mm (1.7 in)
1956
38.1 mm (1.5 in)
1957
58.4 mm (2.3 in)
1958
49.5 mm (1.9 in)
1959
50.8 mm (2.0 in)
1960
51.6 mm (2.0 in)
1961
33.5 mm (1.3 in)
1962
26.7 mm (1.1 in)
1963
46.5 mm (1.8 in)
1964
47.0 mm (1.9 in)
1965
91.4 mm (3.6 in)
1966
97.8 mm (3.9 in)
1967
30.2 mm (1.2 in)
1968
33.5 mm (1.3 in)
1969
81.0 mm (3.2 in)
1970
108.0 mm (4.3 in)
1971
55.4 mm (2.2 in)
1972
48.3 mm (1.9 in)
1973
45.7 mm (1.8 in)
1974
20.1 mm (0.8 in)
1975
61.2 mm (2.4 in)
1976
66.8 mm (2.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Groom Creek, 1917 to 1976. The record is 164.1 mm (6.5 in) in 1976, marked on the chart; the median year is 87.4 mm (3.4 in).
Wettest five days (Rx5day) at Groom Creek by year
Year
Wettest five days (Rx5day)
1917
66.1 mm (2.6 in)
1942
17.8 mm (0.7 in)
1943
101.6 mm (4.0 in)
1944
128.3 mm (5.1 in)
1945
104.1 mm (4.1 in)
1946
68.5 mm (2.7 in)
1947
87.9 mm (3.5 in)
1948
76.2 mm (3.0 in)
1949
90.4 mm (3.6 in)
1950
79.7 mm (3.1 in)
1951
123.7 mm (4.9 in)
1952
97.8 mm (3.9 in)
1953
91.7 mm (3.6 in)
1954
138.5 mm (5.5 in)
1955
89.5 mm (3.5 in)
1956
57.9 mm (2.3 in)
1957
97.8 mm (3.9 in)
1958
82.6 mm (3.3 in)
1959
86.4 mm (3.4 in)
1960
61.8 mm (2.4 in)
1961
75.7 mm (3.0 in)
1962
48.5 mm (1.9 in)
1963
110.3 mm (4.3 in)
1964
84.4 mm (3.3 in)
1965
129.2 mm (5.1 in)
1966
145.3 mm (5.7 in)
1967
54.1 mm (2.1 in)
1968
62.9 mm (2.5 in)
1969
116.4 mm (4.6 in)
1970
134.9 mm (5.3 in)
1971
80.9 mm (3.2 in)
1972
124.2 mm (4.9 in)
1973
86.8 mm (3.4 in)
1974
51.3 mm (2.0 in)
1975
80.8 mm (3.2 in)
1976
164.1 mm (6.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Groom Creek, 1917 to 1976. The record is 97 days in 1972, marked on the chart; the median year is 52 days.
Longest dry spell (CDD) at Groom Creek by year
Year
Longest dry spell (CDD)
1917
76 days
1942
57 days
1943
57 days
1944
52 days
1945
86 days
1946
51 days
1947
49 days
1948
55 days
1949
31 days
1950
51 days
1951
59 days
1952
40 days
1953
80 days
1954
34 days
1955
40 days
1956
52 days
1957
44 days
1958
45 days
1959
44 days
1960
34 days
1961
51 days
1962
54 days
1963
70 days
1964
31 days
1965
31 days
1966
44 days
1967
62 days
1968
51 days
1969
52 days
1970
53 days
1971
55 days
1972
97 days
1973
79 days
1974
89 days
1975
43 days
1976
32 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
21 years with a frost
Across 21 years with a frost, the median last spring frost at Groom Creek falls on 25 May and the median first autumn frost on 9 October, which leaves a median of 140 days between them.
Frost dates and growing season at Groom Creek
Measure
Median, all years
Earliest period
Recent period (1943 to 1973)
Recent against earliest
Fitted trend
Last spring frost
25 May
n/a
25 May
n/a
n/a
First autumn frost
9 October
n/a
9 October
n/a
n/a
Growing days
140 days
n/a
140 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.
Download the Data
Data for Groom Creek standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Groom Creek 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.