Lukachukai Weather Records (USC00025129)

Record envelope, standing records and threshold days for Lukachukai (USC00025129), Arizona, United States, with 97 years of record.

Key Facts for Lukachukai

Lukachukai (USC00025129) is a weather station in Arizona, United States at 36.42 latitude and -109.23 longitude, 1,987 m (6,520 ft) above sea level.
The station reports from 1914 to 2010, 97 years of record.
1,464 records set at Lukachukai still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lukachukai set a daily record precipitation of 19.1 mm (0.8 in) on 16 August 2010.

About the Station

Location: Arizona, United States, 36.42 latitude, -109.23 longitude.
Elevation: 1,987 m (6,520 ft).
Period of record: 1914 to 2010, 97 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Lukachukai. 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 Lukachukai, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.9 C (66.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Feb	20.6 C (69.1 F)	-28.9 C (-20.0 F)	n/a	n/a
Mar	25.6 C (78.1 F)	-18.9 C (-2.0 F)	n/a	n/a
Apr	34.4 C (93.9 F)	-16.1 C (3.0 F)	n/a	n/a
May	35.0 C (95.0 F)	-9.4 C (15.1 F)	n/a	n/a
Jun	36.7 C (98.1 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	1.1 C (34.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-9.4 C (15.1 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-13.3 C (8.1 F)	n/a	n/a
Nov	33.3 C (91.9 F)	-22.2 C (-8.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-31.7 C (-25.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lukachukai still stand. 1955 holds the most, with 62.

Standing records at Lukachukai by the year they were set
Year set	Standing records
1914	1
1915	18
1916	28
1917	18
1918	32
1919	39
1951	4
1952	18
1953	25
1954	22
1955	62
1956	32
1957	24
1958	23
1959	22
1960	5
1961	14
1962	27
1963	35
1964	16
1965	7
1966	2
1967	32
1968	52
1969	47
1970	36
1971	48
1972	26
1973	17
1974	34
1975	32
1976	31
1977	19
1978	24
1979	34
1980	18
1981	21
1982	19
1983	33
1984	17
1985	26
1986	29
1987	12
1988	18
1989	35
1990	31
1991	14
1992	29
1993	6
1994	16
1995	29
1996	21
1997	11
1998	8
1999	18
2000	26
2001	9
2002	7
2003	2
2005	21
2006	26
2007	19
2008	21
2009	11
2010	5

All-Time Record Progression

3 new records

3 all-time records were set at Lukachukai between 8 July 1985 and 23 December 2008. Each dot is a new record.

When Lukachukai set new all-time records
Date	Kind	Detail
1985-07-08	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
1989-02-07	Record low maximum temperature	Record low maximum temperature -17.2 C (1.0 F)
2008-12-23	Record daily precipitation	Record daily precipitation 76.2 mm (3.0 in)

Wettest Day of Each Month

Dec: 76.2 mm (3.0 in)

The wettest day on record for each calendar month at Lukachukai. The most was 76.2 mm (3.0 in) on 23 December 2008.

Record daily precipitation for each month at Lukachukai
Month	Record daily precipitation (mm)	Date
Jan	51.3 mm (2.0 in)	5 January 1973
Feb	30.5 mm (1.2 in)	5 February 1989
Mar	50.8 mm (2.0 in)	3 March 1981
Apr	38.6 mm (1.5 in)	1 April 1970
May	36.3 mm (1.4 in)	21 May 1992
Jun	38.1 mm (1.5 in)	22 June 1918
Jul	42.2 mm (1.7 in)	19 July 1969
Aug	40.6 mm (1.6 in)	4 August 1955
Sep	40.6 mm (1.6 in)	27 September 1976
Oct	40.6 mm (1.6 in)	4 October 1969
Nov	34.5 mm (1.4 in)	12 November 1978
Dec	76.2 mm (3.0 in)	23 December 2008

Period of Record Coverage

1914 to 2010

65 years of record at Lukachukai, 1914 to 2010. 32 years have data for under 90 percent of days and are left out of rankings: 1914, 1917, 1918, 1919, 1951, 1956, 1957, 1958 and others.

Days with data per year at Lukachukai
Year	Days with data	Share of year	Complete
1914	42	12%	No
1915	344	94%	Yes
1916	334	91%	Yes
1917	274	75%	No
1918	302	83%	No
1919	151	41%	No
1951	112	31%	No
1952	341	93%	Yes
1953	348	95%	Yes
1954	345	95%	Yes
1955	353	97%	Yes
1956	327	89%	No
1957	328	90%	No
1958	257	70%	No
1959	274	75%	No
1960	111	30%	No
1961	329	90%	Yes
1962	271	74%	No
1963	337	92%	Yes
1964	179	49%	No
1965	91	25%	No
1966	30	8%	No
1967	281	77%	No
1968	268	73%	No
1969	363	99%	Yes
1970	365	100%	Yes
1971	326	89%	No
1972	357	98%	Yes
1973	364	100%	Yes
1974	363	99%	Yes
1975	337	92%	Yes
1976	364	99%	Yes
1977	331	91%	Yes
1978	328	90%	No
1979	301	82%	No
1980	352	96%	Yes
1981	364	100%	Yes
1982	303	83%	No
1983	338	93%	Yes
1984	364	99%	Yes
1985	361	99%	Yes
1986	344	94%	Yes
1987	331	91%	Yes
1988	362	99%	Yes
1989	362	99%	Yes
1990	334	92%	Yes
1991	362	99%	Yes
1992	364	99%	Yes
1993	363	99%	Yes
1994	362	99%	Yes
1995	362	99%	Yes
1996	331	90%	Yes
1997	317	87%	No
1998	262	72%	No
1999	247	68%	No
2000	201	55%	No
2001	153	42%	No
2002	56	15%	No
2003	37	10%	No
2005	272	75%	No
2006	329	90%	Yes
2007	309	85%	No
2008	326	89%	No
2009	143	39%	No
2010	68	19%	No

Latest Records

Latest records at Lukachukai
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 August 2010	Lukachukai, US	daily rain	19.1 mm (0.8 in)	2.8 mm (0.11 in)	20 years	19 of 100 (Routine)
8 August 2010	Lukachukai, US	daily low max	22.8 C (73.0 F)	0.5 C (0.9 F)	36 years	20 of 100 (Routine)
5 August 2010	Lukachukai, US	daily rain	38.1 mm (1.5 in)	12.2 mm (0.5 in)	12 years	29 of 100 (Routine)
1 August 2010	Lukachukai, US	daily rain	25.4 mm (1.0 in)	2.5 mm (0.10 in)	28 years	20 of 100 (Routine)
18 July 2010	Lukachukai, US	daily high min	18.9 C (66.0 F)	0.6 C (1.1 F)	19 years	16 of 100 (Routine)
17 July 2010	Lukachukai, US	daily high max (Tie)	35.0 C (95.0 F)	tie	8 years	2 of 100 (Routine)
16 July 2010	Lukachukai, US	daily high max (Tie)	35.0 C (95.0 F)	tie	40 years	5 of 100 (Routine)
25 June 2010	Lukachukai, US	daily high min	20.0 C (68.0 F)	0.6 C (1.1 F)	28 years	18 of 100 (Routine)
24 June 2010	Lukachukai, US	daily high min	20.0 C (68.0 F)	2.2 C (4.0 F)	51 years	29 of 100 (Routine)
9 June 2010	Lukachukai, US	daily high min	17.2 C (63.0 F)	2.2 C (4.0 F)	13 years	18 of 100 (Routine)
19 June 2009	Lukachukai, US	daily low max (Tie)	20.0 C (68.0 F)	tie	42 years	5 of 100 (Routine)
18 May 2009	Lukachukai, US	daily high max (Tie)	30.6 C (87.1 F)	tie	52 years	6 of 100 (Routine)
11 May 2009	Lukachukai, US	daily high max	27.2 C (81.0 F)	0.5 C (0.9 F)	52 years	25 of 100 (Routine)
10 May 2009	Lukachukai, US	daily high min	12.2 C (54.0 F)	2.2 C (4.0 F)	48 years	28 of 100 (Routine)
7 May 2009	Lukachukai, US	daily high max	27.8 C (82.0 F)	0.6 C (1.1 F)	46 years	23 of 100 (Routine)
6 May 2009	Lukachukai, US	daily high max (Tie)	27.2 C (81.0 F)	tie	46 years	5 of 100 (Routine)
29 March 2009	Lukachukai, US	daily low min	-13.9 C (7.0 F)	0.6 C (1.1 F)	40 years	22 of 100 (Routine)
26 March 2009	Lukachukai, US	daily high max (Tie)	20.6 C (69.1 F)	tie	52 years	6 of 100 (Routine)
20 March 2009	Lukachukai, US	daily high min	7.2 C (45.0 F)	2.2 C (4.0 F)	92 years	40 of 100 (Notable)
18 March 2009	Lukachukai, US	daily high min (Tie)	3.9 C (39.0 F)	tie	15 years	3 of 100 (Routine)

Climate Trend

21 complete years, 1954 to 1995

One stripe for each of 21 complete years at Lukachukai, 1954 to 1995. Blue stripes are years cooler than the station's own mean of 10.0 C (50.1 F); red stripes are warmer. The coolest year was 1969, at 8.1 C (46.5 F), and the warmest was 1954, at 11.6 C (52.8 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Lukachukai as warming stripes, 1954 to 1995
Year	Annual mean temperature	Difference from the station mean
1954	11.6 C	+1.53 C
1955	9.5 C	-0.56 C
1957	10.6 C	+0.59 C
1961	10.1 C	+0.06 C
1963	11.2 C	+1.16 C
1969	8.1 C	-1.96 C
1970	9.3 C	-0.74 C
1972	10.6 C	+0.52 C
1973	9.2 C	-0.79 C
1974	9.1 C	-0.91 C
1976	8.8 C	-1.22 C
1980	10.2 C	+0.15 C
1981	11.2 C	+1.16 C
1985	10.3 C	+0.29 C
1988	9.8 C	-0.21 C
1989	10.9 C	+0.87 C
1991	9.4 C	-0.63 C
1992	9.4 C	-0.59 C
1993	10.0 C	-0.02 C
1994	10.7 C	+0.69 C
1995	10.7 C	+0.67 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

1914 to 2010

Yearly extremes at Lukachukai: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1985	35.0 C (95.0 F)	65
Coldest night (TNn)	-31.7 C (-25.1 F)	1968	-18.3 C (-0.9 F)	65
Wettest day (Rx1day)	76.2 mm (3.0 in)	2008	25.4 mm (1.0 in)	65
Wettest five days (Rx5day)	101.6 mm (4.0 in)	2008	40.6 mm (1.6 in)	65
Longest dry spell (CDD)	281 days	2001	59 days	65

Hottest day (TXx)

The hottest day of the year at Lukachukai, 1914 to 2010. The record is 37.8 C (100.0 F) in 1985, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Lukachukai by year
Year	Hottest day (TXx)
1914	18.3 C (64.9 F)
1915	33.3 C (91.9 F)
1916	33.9 C (93.0 F)
1917	35.0 C (95.0 F)
1918	35.0 C (95.0 F)
1919	33.3 C (91.9 F)
1951	30.0 C (86.0 F)
1952	32.8 C (91.0 F)
1953	35.0 C (95.0 F)
1954	36.7 C (98.1 F)
1955	36.1 C (97.0 F)
1956	34.4 C (93.9 F)
1957	36.1 C (97.0 F)
1958	36.1 C (97.0 F)
1959	35.6 C (96.1 F)
1960	35.0 C (95.0 F)
1961	35.0 C (95.0 F)
1962	35.6 C (96.1 F)
1963	35.0 C (95.0 F)
1964	28.9 C (84.0 F)
1965	36.7 C (98.1 F)
1966	14.4 C (57.9 F)
1967	35.6 C (96.1 F)
1968	36.7 C (98.1 F)
1969	34.4 C (93.9 F)
1970	35.0 C (95.0 F)
1971	36.1 C (97.0 F)
1972	35.0 C (95.0 F)
1973	35.6 C (96.1 F)
1974	35.0 C (95.0 F)
1975	34.4 C (93.9 F)
1976	35.6 C (96.1 F)
1977	36.7 C (98.1 F)
1978	35.0 C (95.0 F)
1979	34.4 C (93.9 F)
1980	36.1 C (97.0 F)
1981	35.6 C (96.1 F)
1982	33.9 C (93.0 F)
1983	35.0 C (95.0 F)
1984	35.6 C (96.1 F)
1985	37.8 C (100.0 F)
1986	34.4 C (93.9 F)
1987	33.9 C (93.0 F)
1988	32.8 C (91.0 F)
1989	36.7 C (98.1 F)
1990	35.0 C (95.0 F)
1991	32.8 C (91.0 F)
1992	32.8 C (91.0 F)
1993	33.9 C (93.0 F)
1994	36.1 C (97.0 F)
1995	36.1 C (97.0 F)
1996	35.0 C (95.0 F)
1997	35.0 C (95.0 F)
1998	35.0 C (95.0 F)
1999	36.1 C (97.0 F)
2000	35.6 C (96.1 F)
2001	35.0 C (95.0 F)
2002	31.7 C (89.1 F)
2003	21.7 C (71.1 F)
2005	36.7 C (98.1 F)
2006	35.6 C (96.1 F)
2007	36.1 C (97.0 F)
2008	33.3 C (91.9 F)
2009	32.2 C (90.0 F)
2010	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Lukachukai, 1914 to 2010. The record is -31.7 C (-25.1 F) in 1968, marked on the chart; the median year is -18.3 C (-0.9 F).

Coldest night (TNn) at Lukachukai by year
Year	Coldest night (TNn)
1914	-20.0 C (-4.0 F)
1915	-21.1 C (-6.0 F)
1916	-23.3 C (-9.9 F)
1917	-14.4 C (6.1 F)
1918	-20.0 C (-4.0 F)
1919	-9.4 C (15.1 F)
1951	-18.9 C (-2.0 F)
1952	-18.3 C (-0.9 F)
1953	-16.1 C (3.0 F)
1954	-16.7 C (1.9 F)
1955	-24.4 C (-11.9 F)
1956	-19.4 C (-2.9 F)
1957	-15.6 C (3.9 F)
1958	-15.0 C (5.0 F)
1959	-15.6 C (3.9 F)
1960	-10.0 C (14.0 F)
1961	-21.1 C (-6.0 F)
1962	-21.1 C (-6.0 F)
1963	-28.9 C (-20.0 F)
1964	-18.9 C (-2.0 F)
1965	-1.7 C (28.9 F)
1966	-20.6 C (-5.1 F)
1967	-17.8 C (0.0 F)
1968	-31.7 C (-25.1 F)
1969	-22.8 C (-9.0 F)
1970	-20.0 C (-4.0 F)
1971	-21.1 C (-6.0 F)
1972	-21.7 C (-7.1 F)
1973	-20.0 C (-4.0 F)
1974	-23.9 C (-11.0 F)
1975	-20.0 C (-4.0 F)
1976	-23.3 C (-9.9 F)
1977	-22.8 C (-9.0 F)
1978	-26.7 C (-16.1 F)
1979	-22.8 C (-9.0 F)
1980	-15.0 C (5.0 F)
1981	-16.1 C (3.0 F)
1982	-24.4 C (-11.9 F)
1983	-15.0 C (5.0 F)
1984	-18.3 C (-0.9 F)
1985	-28.3 C (-18.9 F)
1986	-18.3 C (-0.9 F)
1987	-16.1 C (3.0 F)
1988	-22.2 C (-8.0 F)
1989	-28.9 C (-20.0 F)
1990	-24.4 C (-11.9 F)
1991	-17.2 C (1.0 F)
1992	-16.7 C (1.9 F)
1993	-13.9 C (7.0 F)
1994	-16.7 C (1.9 F)
1995	-12.2 C (10.0 F)
1996	-16.1 C (3.0 F)
1997	-17.8 C (0.0 F)
1998	-15.6 C (3.9 F)
1999	-13.3 C (8.1 F)
2000	-15.6 C (3.9 F)
2001	-17.2 C (1.0 F)
2002	-16.1 C (3.0 F)
2003	-11.1 C (12.0 F)
2005	-17.8 C (0.0 F)
2006	-17.2 C (1.0 F)
2007	-20.0 C (-4.0 F)
2008	-28.3 C (-18.9 F)
2009	-18.3 C (-0.9 F)
2010	5.0 C (41.0 F)

Wettest day (Rx1day)

The wettest day of the year at Lukachukai, 1914 to 2010. The record is 76.2 mm (3.0 in) in 2008, marked on the chart; the median year is 25.4 mm (1.0 in).

Wettest day (Rx1day) at Lukachukai by year
Year	Wettest day (Rx1day)
1914	12.7 mm (0.5 in)
1915	25.4 mm (1.0 in)
1916	22.9 mm (0.9 in)
1917	17.8 mm (0.7 in)
1918	38.1 mm (1.5 in)
1919	11.4 mm (0.4 in)
1951	13.0 mm (0.5 in)
1952	32.0 mm (1.3 in)
1953	21.8 mm (0.9 in)
1954	40.6 mm (1.6 in)
1955	40.6 mm (1.6 in)
1956	26.2 mm (1.0 in)
1957	18.0 mm (0.7 in)
1958	12.2 mm (0.5 in)
1959	25.9 mm (1.0 in)
1960	19.8 mm (0.8 in)
1961	28.4 mm (1.1 in)
1962	38.9 mm (1.5 in)
1963	26.7 mm (1.1 in)
1964	43.7 mm (1.7 in)
1965	15.7 mm (0.6 in)
1966	5.1 mm (0.20 in)
1967	12.7 mm (0.5 in)
1968	33.5 mm (1.3 in)
1969	42.2 mm (1.7 in)
1970	38.6 mm (1.5 in)
1971	35.6 mm (1.4 in)
1972	17.8 mm (0.7 in)
1973	51.3 mm (2.0 in)
1974	22.9 mm (0.9 in)
1975	22.9 mm (0.9 in)
1976	40.6 mm (1.6 in)
1977	17.8 mm (0.7 in)
1978	34.5 mm (1.4 in)
1979	20.3 mm (0.8 in)
1980	24.9 mm (1.0 in)
1981	50.8 mm (2.0 in)
1982	22.9 mm (0.9 in)
1983	38.6 mm (1.5 in)
1984	25.4 mm (1.0 in)
1985	23.4 mm (0.9 in)
1986	35.1 mm (1.4 in)
1987	25.4 mm (1.0 in)
1988	29.2 mm (1.1 in)
1989	30.5 mm (1.2 in)
1990	29.5 mm (1.2 in)
1991	35.6 mm (1.4 in)
1992	36.3 mm (1.4 in)
1993	16.0 mm (0.6 in)
1994	24.4 mm (1.0 in)
1995	18.0 mm (0.7 in)
1996	29.2 mm (1.1 in)
1997	25.9 mm (1.0 in)
1998	40.1 mm (1.6 in)
1999	25.4 mm (1.0 in)
2000	4.3 mm (0.17 in)
2001	3.6 mm (0.14 in)
2002	38.1 mm (1.5 in)
2003	0.0 mm (0.00 in)
2005	23.9 mm (0.9 in)
2006	22.9 mm (0.9 in)
2007	29.0 mm (1.1 in)
2008	76.2 mm (3.0 in)
2009	5.1 mm (0.20 in)
2010	38.1 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lukachukai, 1914 to 2010. The record is 101.6 mm (4.0 in) in 2008, marked on the chart; the median year is 40.6 mm (1.6 in).

Wettest five days (Rx5day) at Lukachukai by year
Year	Wettest five days (Rx5day)
1914	31.8 mm (1.3 in)
1915	67.5 mm (2.7 in)
1916	32.6 mm (1.3 in)
1917	52.1 mm (2.1 in)
1918	56.1 mm (2.2 in)
1919	22.9 mm (0.9 in)
1951	20.4 mm (0.8 in)
1952	35.3 mm (1.4 in)
1953	37.1 mm (1.5 in)
1954	42.4 mm (1.7 in)
1955	55.6 mm (2.2 in)
1956	47.7 mm (1.9 in)
1957	37.4 mm (1.5 in)
1958	20.1 mm (0.8 in)
1959	33.8 mm (1.3 in)
1960	31.2 mm (1.2 in)
1961	45.9 mm (1.8 in)
1962	65.6 mm (2.6 in)
1963	46.0 mm (1.8 in)
1964	44.6 mm (1.8 in)
1965	19.1 mm (0.8 in)
1966	5.1 mm (0.20 in)
1967	16.0 mm (0.6 in)
1968	36.9 mm (1.5 in)
1969	52.9 mm (2.1 in)
1970	56.4 mm (2.2 in)
1971	48.3 mm (1.9 in)
1972	40.8 mm (1.6 in)
1973	64.0 mm (2.5 in)
1974	40.7 mm (1.6 in)
1975	42.2 mm (1.7 in)
1976	67.3 mm (2.6 in)
1977	42.2 mm (1.7 in)
1978	44.5 mm (1.8 in)
1979	28.0 mm (1.1 in)
1980	35.8 mm (1.4 in)
1981	55.1 mm (2.2 in)
1982	43.5 mm (1.7 in)
1983	61.9 mm (2.4 in)
1984	67.3 mm (2.6 in)
1985	36.3 mm (1.4 in)
1986	35.1 mm (1.4 in)
1987	44.3 mm (1.7 in)
1988	50.8 mm (2.0 in)
1989	31.5 mm (1.2 in)
1990	61.0 mm (2.4 in)
1991	35.6 mm (1.4 in)
1992	56.6 mm (2.2 in)
1993	17.5 mm (0.7 in)
1994	26.2 mm (1.0 in)
1995	24.2 mm (1.0 in)
1996	40.6 mm (1.6 in)
1997	36.6 mm (1.4 in)
1998	58.4 mm (2.3 in)
1999	19.3 mm (0.8 in)
2000	3.4 mm (0.13 in)
2001	3.6 mm (0.14 in)
2002	38.1 mm (1.5 in)
2003	0.0 mm (0.00 in)
2005	28.0 mm (1.1 in)
2006	49.1 mm (1.9 in)
2007	55.9 mm (2.2 in)
2008	101.6 mm (4.0 in)
2009	5.1 mm (0.20 in)
2010	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lukachukai, 1914 to 2010. The record is 281 days in 2001, marked on the chart; the median year is 59 days.

Longest dry spell (CDD) at Lukachukai by year
Year	Longest dry spell (CDD)
1914	29 days
1915	45 days
1916	68 days
1917	102 days
1918	40 days
1919	51 days
1951	30 days
1952	40 days
1953	43 days
1954	35 days
1955	39 days
1956	68 days
1957	41 days
1958	30 days
1959	43 days
1960	48 days
1961	50 days
1962	51 days
1963	101 days
1964	33 days
1965	26 days
1966	26 days
1967	63 days
1968	63 days
1969	36 days
1970	43 days
1971	59 days
1972	84 days
1973	67 days
1974	103 days
1975	40 days
1976	60 days
1977	115 days
1978	169 days
1979	63 days
1980	75 days
1981	42 days
1982	117 days
1983	59 days
1984	55 days
1985	82 days
1986	64 days
1987	87 days
1988	73 days
1989	117 days
1990	28 days
1991	90 days
1992	36 days
1993	150 days
1994	54 days
1995	32 days
1996	88 days
1997	81 days
1998	79 days
1999	70 days
2000	175 days
2001	281 days
2002	151 days
2003	92 days
2005	53 days
2006	39 days
2007	81 days
2008	92 days
2009	26 days
2010	30 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 Lukachukai falls on 16 May and the median first autumn frost on 16 October, which leaves a median of 155 days between them.

Frost dates and growing season at Lukachukai
Measure	Median, all years	Earliest period	Recent period (1954 to 1995)	Recent against earliest	Fitted trend
Last spring frost	16 May	n/a	16 May	n/a	n/a
First autumn frost	16 October	n/a	16 October	n/a	n/a
Growing days	155 days	n/a	155 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

35 years, 1915 to 2008

A day with at least 29.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 67.0 mm (2.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Lukachukai: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.5 mm (1.2 in)
5 years	40.7 mm (1.6 in)
10 years	47.7 mm (1.9 in)
25 years	55.9 mm (2.2 in)
50 years	61.6 mm (2.4 in)	Longer than the 35 years of record
100 years	67.0 mm (2.6 in)	Longer than the 35 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, 35 years of values from 1915 to 2008.

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: 76.2 mm (3.0 in) in 2008; 51.3 mm (2.0 in) in 1973; 50.8 mm (2.0 in) in 1981.

Download the Data

Data for Lukachukai standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lukachukai 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).