Y Lightning Rch Weather Records (USC00029562)

Record envelope, standing records and threshold days for Y Lightning Rch (USC00029562), Arizona, United States, with 77 years of record.

Key Facts for Y Lightning Rch

Y Lightning Rch (USC00029562) is a weather station in Arizona, United States at 31.45 latitude and -110.23 longitude, 1,399 m (4,590 ft) above sea level.
The station reports from 1939 to 2015, 77 years of record.
1,464 records set at Y Lightning Rch still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Y Lightning Rch set a monthly record daily precipitation of 76.5 mm (3.0 in) on 31 January 2015.

About the Station

Location: Arizona, United States, 31.45 latitude, -110.23 longitude.
Elevation: 1,399 m (4,590 ft).
Period of record: 1939 to 2015, 77 years.
Eligible elements: 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 Y Lightning Rch. 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 Y Lightning Rch, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-11.1 C (12.0 F)	n/a	n/a
Feb	26.1 C (79.0 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	36.1 C (97.0 F)	-0.6 C (30.9 F)	n/a	n/a
May	38.9 C (102.0 F)	4.4 C (39.9 F)	n/a	n/a
Jun	41.7 C (107.1 F)	10.6 C (51.1 F)	n/a	n/a
Jul	40.6 C (105.1 F)	13.9 C (57.0 F)	n/a	n/a
Aug	39.4 C (102.9 F)	16.1 C (61.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	10.6 C (51.1 F)	n/a	n/a
Oct	34.4 C (93.9 F)	3.9 C (39.0 F)	n/a	n/a
Nov	30.0 C (86.0 F)	-4.4 C (24.1 F)	n/a	n/a
Dec	26.7 C (80.1 F)	-6.7 C (19.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Y Lightning Rch still stand. 2012 holds the most, with 664.

All-Time Record Progression

4 new records

4 all-time records were set at Y Lightning Rch between 13 March 1973 and 17 December 1987. Each dot is a new record.

When Y Lightning Rch set new all-time records
Date	Kind	Detail
1973-03-13	Record daily snowfall	Record daily snowfall 16.5 cm (6.5 in)
1974-07-19	Record daily precipitation	Record daily precipitation 76.2 mm (3.0 in)
1978-12-07	Record daily snowfall	Record daily snowfall 29.2 cm (11.5 in)
1987-12-17	Record daily precipitation	Record daily precipitation 78.0 mm (3.1 in)

Wettest Day of Each Month

Dec: 78.0 mm (3.1 in)

The wettest day on record for each calendar month at Y Lightning Rch. The most was 78.0 mm (3.1 in) on 17 December 1987.

Record daily precipitation for each month at Y Lightning Rch
Month	Record daily precipitation (mm)	Date
Jan	76.5 mm (3.0 in)	31 January 2015
Feb	43.2 mm (1.7 in)	22 February 1973
Mar	52.1 mm (2.1 in)	1 March 1953
Apr	31.8 mm (1.3 in)	3 April 2004
May	20.8 mm (0.8 in)	23 May 2008
Jun	47.2 mm (1.9 in)	2 June 1952
Jul	76.2 mm (3.0 in)	19 July 1974
Aug	64.8 mm (2.6 in)	16 August 1941
Sep	58.2 mm (2.3 in)	26 September 1948
Oct	69.3 mm (2.7 in)	12 October 2000
Nov	71.6 mm (2.8 in)	12 November 1994
Dec	78.0 mm (3.1 in)	17 December 1987

Period of Record Coverage

2011 to 2013

3 years of record at Y Lightning Rch, 2011 to 2013. 2 years have data for under 90 percent of days and are left out of rankings: 2011, 2013.

Latest Records

Latest records at Y Lightning Rch
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 January 2015	Y Lightning Rch, US	monthly rain	76.5 mm (3.0 in)	0.8 mm (0.03 in)	5 years	18 of 100 (Routine)
7 September 2014	Y Lightning Rch, US	daily rain	36.1 mm (1.4 in)	25.2 mm (1.0 in)	24 years	42 of 100 (Notable)
26 August 2014	Y Lightning Rch, US	daily rain	30.7 mm (1.2 in)	1.0 mm (0.04 in)	41 years	20 of 100 (Routine)
11 July 2014	Y Lightning Rch, US	daily rain	21.1 mm (0.8 in)	0.5 mm (0.02 in)	59 years	20 of 100 (Routine)
17 July 2013	Y Lightning Rch, US	daily rain	24.4 mm (1.0 in)	0.3 mm (0.01 in)	52 years	20 of 100 (Routine)
12 May 2013	Y Lightning Rch, US	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	74 years	20 of 100 (Routine)
4 September 2012	Y Lightning Rch, US	daily rain	36.8 mm (1.4 in)	1.5 mm (0.06 in)	25 years	15 of 100 (Routine)
17 June 2012	Y Lightning Rch, US	daily rain	9.7 mm (0.38 in)	8.2 mm (0.32 in)	51 years	20 of 100 (Routine)
10 May 2012	Y Lightning Rch, US	daily rain	3.8 mm (0.15 in)	2.0 mm (0.08 in)	57 years	20 of 100 (Routine)
13 December 2011	Y Lightning Rch, US	daily rain	22.9 mm (0.9 in)	12.7 mm (0.5 in)	70 years	20 of 100 (Routine)
10 September 2011	Y Lightning Rch, US	daily rain	22.9 mm (0.9 in)	4.4 mm (0.17 in)	44 years	20 of 100 (Routine)
1 August 2011	Y Lightning Rch, US	daily rain (Tie)	19.3 mm (0.8 in)	tie	64 years	6 of 100 (Routine)
27 February 2011	Y Lightning Rch, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	72 years	20 of 100 (Routine)
25 August 2010	Y Lightning Rch, US	daily rain	38.9 mm (1.5 in)	2.6 mm (0.10 in)	23 years	15 of 100 (Routine)
7 August 2010	Y Lightning Rch, US	daily rain	38.1 mm (1.5 in)	12.7 mm (0.5 in)	24 years	27 of 100 (Routine)
22 July 2010	Y Lightning Rch, US	daily rain	40.1 mm (1.6 in)	10.9 mm (0.4 in)	37 years	29 of 100 (Routine)
22 April 2010	Y Lightning Rch, US	daily rain	2.5 mm (0.10 in)	2.5 mm (0.10 in)	71 years	20 of 100 (Routine)
8 March 2010	Y Lightning Rch, US	daily rain (Tie)	9.1 mm (0.36 in)	tie	8 years	2 of 100 (Routine)
4 February 2010	Y Lightning Rch, US	daily rain	21.8 mm (0.9 in)	11.6 mm (0.5 in)	8 years	20 of 100 (Routine)
22 January 2010	Y Lightning Rch, US	monthly rain	75.7 mm (3.0 in)	29.5 mm (1.2 in)	21 years	63 of 100 (Major)

Extremes by Year

1939 to 2015

Yearly extremes at Y Lightning Rch: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	2011	41.1 C (106.0 F)	3
Coldest night (TNn)	-11.1 C (12.0 F)	2013	-6.7 C (19.9 F)	3
Wettest day (Rx1day)	78.0 mm (3.1 in)	1987	38.1 mm (1.5 in)	77
Wettest five days (Rx5day)	147.9 mm (5.8 in)	1977	61.7 mm (2.4 in)	77
Longest dry spell (CDD)	149 days	1972	69 days	77

Hottest day (TXx)

The hottest day of the year at Y Lightning Rch, 1939 to 2015. The record is 41.7 C (107.1 F) in 2011, marked on the chart; the median year is 41.1 C (106.0 F).

Hottest day (TXx) at Y Lightning Rch by year
Year	Hottest day (TXx)
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	41.7 C (107.1 F)
2012	41.1 C (106.0 F)
2013	40.6 C (105.1 F)
2014	n/a
2015	n/a

Coldest night (TNn)

The coldest night of the year at Y Lightning Rch, 1939 to 2015. The record is -11.1 C (12.0 F) in 2013, marked on the chart; the median year is -6.7 C (19.9 F).

Coldest night (TNn) at Y Lightning Rch by year
Year	Coldest night (TNn)
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	-6.7 C (19.9 F)
2012	-5.6 C (21.9 F)
2013	-11.1 C (12.0 F)
2014	n/a
2015	n/a

Wettest day (Rx1day)

The wettest day of the year at Y Lightning Rch, 1939 to 2015. The record is 78.0 mm (3.1 in) in 1987, marked on the chart; the median year is 38.1 mm (1.5 in).

Wettest day (Rx1day) at Y Lightning Rch by year
Year	Wettest day (Rx1day)
1939	22.1 mm (0.9 in)
1940	56.4 mm (2.2 in)
1941	64.8 mm (2.6 in)
1942	17.0 mm (0.7 in)
1943	32.5 mm (1.3 in)
1944	38.1 mm (1.5 in)
1945	30.5 mm (1.2 in)
1946	38.1 mm (1.5 in)
1947	29.0 mm (1.1 in)
1948	58.2 mm (2.3 in)
1949	33.5 mm (1.3 in)
1950	22.9 mm (0.9 in)
1951	24.9 mm (1.0 in)
1952	47.2 mm (1.9 in)
1953	52.1 mm (2.1 in)
1954	29.2 mm (1.1 in)
1955	52.6 mm (2.1 in)
1956	16.8 mm (0.7 in)
1957	34.3 mm (1.4 in)
1958	42.2 mm (1.7 in)
1959	44.5 mm (1.8 in)
1960	34.0 mm (1.3 in)
1961	27.9 mm (1.1 in)
1962	25.9 mm (1.0 in)
1963	31.8 mm (1.3 in)
1964	28.7 mm (1.1 in)
1965	47.0 mm (1.9 in)
1966	42.4 mm (1.7 in)
1967	58.4 mm (2.3 in)
1968	44.5 mm (1.8 in)
1969	38.1 mm (1.5 in)
1970	30.0 mm (1.2 in)
1971	24.1 mm (0.9 in)
1972	43.2 mm (1.7 in)
1973	43.2 mm (1.7 in)
1974	76.2 mm (3.0 in)
1975	31.8 mm (1.3 in)
1976	27.9 mm (1.1 in)
1977	48.3 mm (1.9 in)
1978	50.8 mm (2.0 in)
1979	45.2 mm (1.8 in)
1980	34.3 mm (1.4 in)
1981	39.4 mm (1.6 in)
1982	27.2 mm (1.1 in)
1983	39.4 mm (1.6 in)
1984	23.9 mm (0.9 in)
1985	31.8 mm (1.3 in)
1986	33.8 mm (1.3 in)
1987	78.0 mm (3.1 in)
1988	33.5 mm (1.3 in)
1989	50.8 mm (2.0 in)
1990	28.4 mm (1.1 in)
1991	38.1 mm (1.5 in)
1992	62.2 mm (2.4 in)
1993	52.6 mm (2.1 in)
1994	71.6 mm (2.8 in)
1995	37.3 mm (1.5 in)
1996	52.6 mm (2.1 in)
1997	32.3 mm (1.3 in)
1998	33.5 mm (1.3 in)
1999	33.0 mm (1.3 in)
2000	69.3 mm (2.7 in)
2001	27.4 mm (1.1 in)
2002	27.9 mm (1.1 in)
2003	22.4 mm (0.9 in)
2004	56.1 mm (2.2 in)
2005	49.0 mm (1.9 in)
2006	50.3 mm (2.0 in)
2007	46.0 mm (1.8 in)
2008	49.0 mm (1.9 in)
2009	31.5 mm (1.2 in)
2010	75.7 mm (3.0 in)
2011	23.6 mm (0.9 in)
2012	36.8 mm (1.4 in)
2013	45.2 mm (1.8 in)
2014	36.1 mm (1.4 in)
2015	76.5 mm (3.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Y Lightning Rch, 1939 to 2015. The record is 147.9 mm (5.8 in) in 1977, marked on the chart; the median year is 61.7 mm (2.4 in).

Wettest five days (Rx5day) at Y Lightning Rch by year
Year	Wettest five days (Rx5day)
1939	46.2 mm (1.8 in)
1940	62.0 mm (2.4 in)
1941	69.9 mm (2.8 in)
1942	24.9 mm (1.0 in)
1943	43.9 mm (1.7 in)
1944	70.6 mm (2.8 in)
1945	53.3 mm (2.1 in)
1946	65.8 mm (2.6 in)
1947	29.0 mm (1.1 in)
1948	63.3 mm (2.5 in)
1949	56.4 mm (2.2 in)
1950	45.8 mm (1.8 in)
1951	45.4 mm (1.8 in)
1952	47.2 mm (1.9 in)
1953	63.0 mm (2.5 in)
1954	97.7 mm (3.8 in)
1955	79.3 mm (3.1 in)
1956	41.1 mm (1.6 in)
1957	38.1 mm (1.5 in)
1958	61.7 mm (2.4 in)
1959	48.3 mm (1.9 in)
1960	63.7 mm (2.5 in)
1961	46.7 mm (1.8 in)
1962	63.3 mm (2.5 in)
1963	74.2 mm (2.9 in)
1964	52.3 mm (2.1 in)
1965	61.3 mm (2.4 in)
1966	92.5 mm (3.6 in)
1967	70.6 mm (2.8 in)
1968	76.5 mm (3.0 in)
1969	61.2 mm (2.4 in)
1970	56.7 mm (2.2 in)
1971	48.3 mm (1.9 in)
1972	66.3 mm (2.6 in)
1973	61.0 mm (2.4 in)
1974	94.1 mm (3.7 in)
1975	52.1 mm (2.1 in)
1976	54.1 mm (2.1 in)
1977	147.9 mm (5.8 in)
1978	95.3 mm (3.8 in)
1979	48.5 mm (1.9 in)
1980	39.9 mm (1.6 in)
1981	51.9 mm (2.0 in)
1982	52.1 mm (2.1 in)
1983	110.8 mm (4.4 in)
1984	56.9 mm (2.2 in)
1985	61.7 mm (2.4 in)
1986	68.2 mm (2.7 in)
1987	80.8 mm (3.2 in)
1988	55.6 mm (2.2 in)
1989	50.8 mm (2.0 in)
1990	48.2 mm (1.9 in)
1991	51.3 mm (2.0 in)
1992	97.3 mm (3.8 in)
1993	93.1 mm (3.7 in)
1994	119.1 mm (4.7 in)
1995	55.6 mm (2.2 in)
1996	78.0 mm (3.1 in)
1997	46.8 mm (1.8 in)
1998	87.6 mm (3.4 in)
1999	83.4 mm (3.3 in)
2000	108.4 mm (4.3 in)
2001	44.0 mm (1.7 in)
2002	58.2 mm (2.3 in)
2003	33.8 mm (1.3 in)
2004	90.4 mm (3.6 in)
2005	66.0 mm (2.6 in)
2006	84.3 mm (3.3 in)
2007	56.6 mm (2.2 in)
2008	75.4 mm (3.0 in)
2009	65.5 mm (2.6 in)
2010	117.8 mm (4.6 in)
2011	41.1 mm (1.6 in)
2012	50.1 mm (2.0 in)
2013	97.8 mm (3.9 in)
2014	74.6 mm (2.9 in)
2015	76.5 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Y Lightning Rch, 1939 to 2015. The record is 149 days in 1972, marked on the chart; the median year is 69 days.

Longest dry spell (CDD) at Y Lightning Rch by year
Year	Longest dry spell (CDD)
1939	69 days
1940	59 days
1941	49 days
1942	75 days
1943	40 days
1944	64 days
1945	95 days
1946	88 days
1947	53 days
1948	91 days
1949	84 days
1950	93 days
1951	32 days
1952	46 days
1953	110 days
1954	90 days
1955	58 days
1956	108 days
1957	53 days
1958	64 days
1959	75 days
1960	132 days
1961	91 days
1962	97 days
1963	74 days
1964	94 days
1965	73 days
1966	52 days
1967	46 days
1968	80 days
1969	63 days
1970	84 days
1971	69 days
1972	149 days
1973	74 days
1974	63 days
1975	81 days
1976	64 days
1977	71 days
1978	64 days
1979	107 days
1980	100 days
1981	58 days
1982	50 days
1983	89 days
1984	89 days
1985	53 days
1986	44 days
1987	45 days
1988	62 days
1989	84 days
1990	43 days
1991	75 days
1992	64 days
1993	52 days
1994	29 days
1995	51 days
1996	91 days
1997	30 days
1998	95 days
1999	101 days
2000	86 days
2001	64 days
2002	144 days
2003	72 days
2004	71 days
2005	58 days
2006	55 days
2007	43 days
2008	96 days
2009	39 days
2010	78 days
2011	99 days
2012	50 days
2013	65 days
2014	55 days
2015	28 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.

Rainfall Return Levels

67 years, 1939 to 2012

A day with at least 38.2 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 86.7 mm (3.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Y Lightning Rch: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.2 mm (1.5 in)
5 years	51.6 mm (2.0 in)
10 years	60.3 mm (2.4 in)
25 years	71.1 mm (2.8 in)
50 years	79.0 mm (3.1 in)
100 years	86.7 mm (3.4 in)	Longer than the 67 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, 67 years of values from 1939 to 2012.

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: 78.0 mm (3.1 in) in 1987; 76.2 mm (3.0 in) in 1974; 75.7 mm (3.0 in) in 2010.

Download the Data

Data for Y Lightning Rch standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Y Lightning Rch 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).

Year	Days with data	Share of year	Complete
2011	321	88%	No
2012	361	99%	Yes
2013	164	45%	No