Chaco Canyon Natl Mon Weather Records (USC00291647)

Record envelope, standing records and threshold days for Chaco Canyon Natl Mon (USC00291647), New Mexico, United States, with 115 years of record.

Key Facts for Chaco Canyon Natl Mon

Chaco Canyon Natl Mon (USC00291647) is a weather station in New Mexico, United States at 36.03 latitude and -107.91 longitude, 1,882 m (6,174 ft) above sea level.
The station reports from 1909 to 2023, 115 years of record.
1,464 records set at Chaco Canyon Natl Mon still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chaco Canyon Natl Mon set a daily record high minimum temperature of 1.7 C (35.1 F) on 2 December 2022.

About the Station

Location: New Mexico, United States, 36.03 latitude, -107.91 longitude.
Elevation: 1,882 m (6,174 ft).
Period of record: 1909 to 2023, 115 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 Chaco Canyon Natl Mon. 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 Chaco Canyon Natl Mon, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.1 C (70.0 F)	-38.3 C (-36.9 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-27.2 C (-17.0 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-17.2 C (1.0 F)	n/a	n/a
May	36.1 C (97.0 F)	-12.2 C (10.0 F)	n/a	n/a
Jun	39.4 C (102.9 F)	-3.9 C (25.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	38.9 C (102.0 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	-7.2 C (19.0 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-16.7 C (1.9 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-37.2 C (-35.0 F)	n/a	n/a
Dec	23.3 C (73.9 F)	-38.9 C (-38.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chaco Canyon Natl Mon still stand. 1935 holds the most, with 49.

Standing records at Chaco Canyon Natl Mon by the year they were set
Year set	Standing records
1912	4
1913	5
1922	17
1923	7
1924	9
1925	9
1932	11
1933	28
1934	30
1935	49
1936	20
1937	29
1938	9
1939	28
1940	19
1941	9
1942	15
1944	19
1945	25
1946	15
1947	21
1948	27
1949	19
1950	26
1951	10
1952	13
1953	8
1954	5
1955	11
1956	20
1957	13
1958	13
1959	8
1960	10
1961	17
1962	21
1963	19
1964	14
1965	24
1966	17
1967	27
1968	20
1969	13
1970	17
1971	38
1972	16
1973	7
1974	18
1975	19
1976	18
1977	12
1978	28
1979	24
1980	17
1981	12
1982	18
1983	12
1984	12
1985	11
1986	24
1987	17
1988	12
1989	22
1990	17
1991	12
1992	14
1993	11
1994	12
1995	24
1996	19
1997	8
1998	9
1999	13
2000	24
2001	12
2002	14
2003	8
2004	7
2005	9
2006	18
2007	12
2008	12
2009	15
2010	21
2011	21
2013	13
2014	10
2015	9
2016	6
2017	12
2018	5
2019	7
2021	1
2022	2

All-Time Record Progression

7 new records

7 all-time records were set at Chaco Canyon Natl Mon between 12 December 1961 and 29 June 1994. Each dot is a new record.

When Chaco Canyon Natl Mon set new all-time records
Date	Kind	Detail
1961-12-12	Record low minimum temperature	Record low minimum temperature -38.9 C (-38.0 F)
1969-10-22	Record daily precipitation	Record daily precipitation 40.6 mm (1.6 in)
1971-01-06	Record low maximum temperature	Record low maximum temperature -14.4 C (6.1 F)
1980-06-29	Record high minimum temperature	Record high minimum temperature 22.8 C (73.0 F)
1982-05-26	Record daily precipitation	Record daily precipitation 56.6 mm (2.2 in)
1982-09-12	Record daily precipitation	Record daily precipitation 71.1 mm (2.8 in)
1994-06-29	Record high minimum temperature	Record high minimum temperature 27.2 C (81.0 F)

Wettest Day of Each Month

Sep: 71.1 mm (2.8 in)

The wettest day on record for each calendar month at Chaco Canyon Natl Mon. The most was 71.1 mm (2.8 in) on 12 September 1982.

Record daily precipitation for each month at Chaco Canyon Natl Mon
Month	Record daily precipitation (mm)	Date
Jan	25.9 mm (1.0 in)	24 January 1989
Feb	25.7 mm (1.0 in)	2 February 1982
Mar	27.9 mm (1.1 in)	31 March 2000
Apr	23.1 mm (0.9 in)	1 April 1949
May	56.6 mm (2.2 in)	26 May 1982
Jun	19.3 mm (0.8 in)	9 June 2009
Jul	57.4 mm (2.3 in)	27 July 1998
Aug	33.8 mm (1.3 in)	22 August 1947
Sep	71.1 mm (2.8 in)	12 September 1982
Oct	40.6 mm (1.6 in)	22 October 1969
Nov	39.6 mm (1.6 in)	4 November 1986
Dec	18.8 mm (0.7 in)	23 December 1945

Period of Record Coverage

1912 to 2022

95 years of record at Chaco Canyon Natl Mon, 1912 to 2022. 34 years have data for under 90 percent of days and are left out of rankings: 1912, 1913, 1922, 1923, 1924, 1925, 1932, 1940 and others.

Days with data per year at Chaco Canyon Natl Mon
Year	Days with data	Share of year	Complete
1912	144	39%	No
1913	134	37%	No
1922	218	60%	No
1923	241	66%	No
1924	193	53%	No
1925	149	41%	No
1932	201	55%	No
1933	363	99%	Yes
1934	365	100%	Yes
1935	362	99%	Yes
1936	363	99%	Yes
1937	361	99%	Yes
1938	331	91%	Yes
1939	332	91%	Yes
1940	325	89%	No
1941	329	90%	Yes
1942	333	91%	Yes
1944	271	74%	No
1945	361	99%	Yes
1946	358	98%	Yes
1947	346	95%	Yes
1948	348	95%	Yes
1949	352	96%	Yes
1950	345	95%	Yes
1951	329	90%	Yes
1952	352	96%	Yes
1953	334	92%	Yes
1954	358	98%	Yes
1955	359	98%	Yes
1956	350	96%	Yes
1957	351	96%	Yes
1958	335	92%	Yes
1959	315	86%	No
1960	360	98%	Yes
1961	353	97%	Yes
1962	365	100%	Yes
1963	361	99%	Yes
1964	359	98%	Yes
1965	335	92%	Yes
1966	363	99%	Yes
1967	353	97%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	334	92%	Yes
1971	364	100%	Yes
1972	363	99%	Yes
1973	272	75%	No
1974	359	98%	Yes
1975	362	99%	Yes
1976	364	99%	Yes
1977	358	98%	Yes
1978	353	97%	Yes
1979	358	98%	Yes
1980	317	87%	No
1981	309	85%	No
1982	316	87%	No
1983	347	95%	Yes
1984	356	97%	Yes
1985	359	98%	Yes
1986	363	99%	Yes
1987	364	100%	Yes
1988	355	97%	Yes
1989	357	98%	Yes
1990	351	96%	Yes
1991	361	99%	Yes
1992	354	97%	Yes
1993	346	95%	Yes
1994	319	87%	No
1995	314	86%	No
1996	331	90%	Yes
1997	328	90%	No
1998	321	88%	No
1999	322	88%	No
2000	323	88%	No
2001	321	88%	No
2002	318	87%	No
2003	325	89%	No
2004	314	86%	No
2005	289	79%	No
2006	317	87%	No
2007	320	88%	No
2008	347	95%	Yes
2009	350	96%	Yes
2010	337	92%	Yes
2011	363	99%	Yes
2012	30	8%	No
2013	243	67%	No
2014	362	99%	Yes
2015	352	96%	Yes
2016	180	49%	No
2017	329	90%	Yes
2018	312	85%	No
2019	319	87%	No
2021	18	5%	No
2022	41	11%	No

Latest Records

Latest records at Chaco Canyon Natl Mon
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 December 2022	Chaco Canyon Natl Mon, US	daily high min	1.7 C (35.1 F)	0.6 C (1.1 F)	24 years	17 of 100 (Routine)
17 November 2022	Chaco Canyon Natl Mon, US	daily low min (Tie)	-15.6 C (3.9 F)	tie	21 years	4 of 100 (Routine)
24 October 2022	Chaco Canyon Natl Mon, US	daily low max	5.0 C (41.0 F)	0.6 C (1.1 F)	37 years	22 of 100 (Routine)
18 February 2021	Chaco Canyon Natl Mon, US	daily low max	0.0 C (32.0 F)	0.6 C (1.1 F)	43 years	23 of 100 (Routine)
17 December 2019	Chaco Canyon Natl Mon, US	daily low max (Tie)	-2.8 C (27.0 F)	tie	86 years	9 of 100 (Routine)
20 November 2019	Chaco Canyon Natl Mon, US	daily rain	5.6 mm (0.22 in)	0.5 mm (0.02 in)	84 years	20 of 100 (Routine)
2 November 2019	Chaco Canyon Natl Mon, US	daily low min (Tie)	-15.0 C (5.0 F)	tie	29 years	4 of 100 (Routine)
1 November 2019	Chaco Canyon Natl Mon, US	daily low min	-16.7 C (1.9 F)	0.6 C (1.1 F)	28 years	19 of 100 (Routine)
30 October 2019	Chaco Canyon Natl Mon, US	monthly low max	-0.6 C (30.9 F)	1.7 C (3.1 F)	46 years	37 of 100 (Notable)
30 October 2019	Chaco Canyon Natl Mon, US	monthly low min	-16.7 C (1.9 F)	2.8 C (5.0 F)	29 years	34 of 100 (Routine)
11 October 2019	Chaco Canyon Natl Mon, US	daily low min (Tie)	-10.0 C (14.0 F)	tie	17 years	3 of 100 (Routine)
10 October 2019	Chaco Canyon Natl Mon, US	daily low max	11.7 C (53.1 F)	1.1 C (2.0 F)	57 years	29 of 100 (Routine)
10 October 2019	Chaco Canyon Natl Mon, US	daily low min (Tie)	-10.0 C (14.0 F)	tie	36 years	5 of 100 (Routine)
7 September 2019	Chaco Canyon Natl Mon, US	daily high max	34.4 C (93.9 F)	1.1 C (2.0 F)	41 years	24 of 100 (Routine)
20 August 2019	Chaco Canyon Natl Mon, US	daily high max (Tie)	35.0 C (95.0 F)	tie	81 years	8 of 100 (Routine)
16 August 2019	Chaco Canyon Natl Mon, US	daily high min (Tie)	16.7 C (62.1 F)	tie	96 years	9 of 100 (Routine)
9 July 2019	Chaco Canyon Natl Mon, US	daily low min	4.4 C (39.9 F)	0.6 C (1.1 F)	70 years	32 of 100 (Routine)
20 May 2019	Chaco Canyon Natl Mon, US	daily low max	9.4 C (48.9 F)	4.5 C (8.1 F)	84 years	45 of 100 (Notable)
9 May 2019	Chaco Canyon Natl Mon, US	daily rain	21.6 mm (0.9 in)	9.4 mm (0.37 in)	40 years	20 of 100 (Routine)
11 March 2019	Chaco Canyon Natl Mon, US	daily rain	7.9 mm (0.31 in)	2.8 mm (0.11 in)	76 years	20 of 100 (Routine)

Climate Trend

56 complete years, 1933 to 2014

One stripe for each of 56 complete years at Chaco Canyon Natl Mon, 1933 to 2014. Blue stripes are years cooler than the station's own mean of 9.9 C (49.7 F); red stripes are warmer. The coolest year was 1964, at 8.1 C (46.5 F), and the warmest was 1950, at 11.3 C (52.4 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Chaco Canyon Natl Mon as warming stripes, 1933 to 2014
Year	Annual mean temperature	Difference from the station mean
1933	9.5 C	-0.36 C
1934	10.3 C	+0.48 C
1936	10.1 C	+0.19 C
1937	10.3 C	+0.40 C
1945	10.0 C	+0.16 C
1946	10.8 C	+0.95 C
1949	10.5 C	+0.63 C
1950	11.3 C	+1.46 C
1951	10.2 C	+0.29 C
1952	9.9 C	+0.06 C
1953	10.4 C	+0.49 C
1954	11.0 C	+1.11 C
1955	9.3 C	-0.55 C
1957	10.0 C	+0.15 C
1958	10.5 C	+0.68 C
1961	8.9 C	-0.99 C
1963	9.3 C	-0.59 C
1964	8.1 C	-1.81 C
1966	9.6 C	-0.29 C
1968	8.3 C	-1.52 C
1969	9.7 C	-0.15 C
1971	9.0 C	-0.88 C
1972	10.0 C	+0.10 C
1974	9.5 C	-0.35 C
1975	8.5 C	-1.36 C
1976	9.0 C	-0.89 C
1977	9.8 C	-0.02 C
1978	10.3 C	+0.44 C
1979	9.1 C	-0.72 C
1983	9.5 C	-0.32 C
1984	9.5 C	-0.37 C
1985	10.1 C	+0.27 C
1986	10.5 C	+0.65 C
1987	9.2 C	-0.67 C
1988	9.8 C	-0.08 C
1989	10.1 C	+0.28 C
1990	9.5 C	-0.39 C
1991	9.5 C	-0.40 C
1992	9.3 C	-0.54 C
1993	9.8 C	-0.10 C
1994	10.3 C	+0.42 C
1996	10.8 C	+0.96 C
1997	9.7 C	-0.13 C
1998	10.1 C	+0.26 C
1999	10.1 C	+0.20 C
2000	10.7 C	+0.82 C
2001	10.3 C	+0.43 C
2002	10.1 C	+0.22 C
2003	10.8 C	+0.96 C
2004	9.8 C	-0.04 C
2006	10.4 C	+0.52 C
2007	10.7 C	+0.83 C
2008	9.6 C	-0.28 C
2009	9.5 C	-0.40 C
2011	9.5 C	-0.40 C
2014	10.0 C	+0.13 C

The fitted trend in annual mean temperature here over 1933 to 2014 is -0.01 C (-0.09 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.15 to 0.13) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chaco Canyon Natl Mon
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.01 C (-0.09 to 0.07) per decade	-0.01 F (-0.15 to 0.13) per decade	1933 to 2014	56	Not clearly different from zero
Mean daily maximum	0.03 C (-0.06 to 0.12) per decade	0.1 F (-0.1 to 0.2) per decade	1933 to 2014	56	Not clearly different from zero
Mean daily minimum	-0.04 C (-0.16 to 0.07) per decade	-0.1 F (-0.3 to 0.1) per decade	1933 to 2014	56	Not clearly different from zero

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

1909 to 2023

Yearly extremes at Chaco Canyon Natl Mon: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1942	36.7 C (98.1 F)	95
Coldest night (TNn)	-38.9 C (-38.0 F)	1961	-22.8 C (-9.0 F)	95
Wettest day (Rx1day)	71.1 mm (2.8 in)	1982	20.5 mm (0.8 in)	98
Wettest five days (Rx5day)	81.7 mm (3.2 in)	1998	31.3 mm (1.2 in)	98
Longest dry spell (CDD)	117 days	1974	46 days	98

Hottest day (TXx)

The hottest day of the year at Chaco Canyon Natl Mon, 1909 to 2023. The record is 41.1 C (106.0 F) in 1942, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Chaco Canyon Natl Mon by year
Year	Hottest day (TXx)
1909	n/a
1910	n/a
1912	36.1 C (97.0 F)
1913	35.0 C (95.0 F)
1922	38.9 C (102.0 F)
1923	36.7 C (98.1 F)
1924	37.8 C (100.0 F)
1925	37.2 C (99.0 F)
1932	36.1 C (97.0 F)
1933	36.7 C (98.1 F)
1934	36.7 C (98.1 F)
1935	35.0 C (95.0 F)
1936	37.2 C (99.0 F)
1937	37.2 C (99.0 F)
1938	38.3 C (100.9 F)
1939	38.9 C (102.0 F)
1940	37.8 C (100.0 F)
1941	37.8 C (100.0 F)
1942	41.1 C (106.0 F)
1944	38.9 C (102.0 F)
1945	40.0 C (104.0 F)
1946	37.2 C (99.0 F)
1947	37.2 C (99.0 F)
1948	37.2 C (99.0 F)
1949	38.3 C (100.9 F)
1950	36.7 C (98.1 F)
1951	37.8 C (100.0 F)
1952	36.1 C (97.0 F)
1953	36.7 C (98.1 F)
1954	37.8 C (100.0 F)
1955	35.6 C (96.1 F)
1956	36.7 C (98.1 F)
1957	37.2 C (99.0 F)
1958	37.8 C (100.0 F)
1959	36.7 C (98.1 F)
1960	36.7 C (98.1 F)
1961	36.7 C (98.1 F)
1962	36.7 C (98.1 F)
1963	37.2 C (99.0 F)
1964	36.7 C (98.1 F)
1965	35.0 C (95.0 F)
1966	36.1 C (97.0 F)
1967	35.0 C (95.0 F)
1968	36.1 C (97.0 F)
1969	37.8 C (100.0 F)
1970	36.7 C (98.1 F)
1971	38.9 C (102.0 F)
1972	37.2 C (99.0 F)
1973	35.6 C (96.1 F)
1974	37.2 C (99.0 F)
1975	35.6 C (96.1 F)
1976	36.7 C (98.1 F)
1977	35.6 C (96.1 F)
1978	37.8 C (100.0 F)
1979	40.0 C (104.0 F)
1980	38.9 C (102.0 F)
1981	39.4 C (102.9 F)
1982	35.0 C (95.0 F)
1983	33.9 C (93.0 F)
1984	36.1 C (97.0 F)
1985	37.2 C (99.0 F)
1986	36.1 C (97.0 F)
1987	37.2 C (99.0 F)
1988	35.6 C (96.1 F)
1989	37.2 C (99.0 F)
1990	37.2 C (99.0 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	35.6 C (96.1 F)
1994	37.8 C (100.0 F)
1995	38.9 C (102.0 F)
1996	36.7 C (98.1 F)
1997	36.1 C (97.0 F)
1998	37.2 C (99.0 F)
1999	36.7 C (98.1 F)
2000	36.7 C (98.1 F)
2001	35.6 C (96.1 F)
2002	37.2 C (99.0 F)
2003	38.3 C (100.9 F)
2004	36.1 C (97.0 F)
2005	38.3 C (100.9 F)
2006	37.2 C (99.0 F)
2007	36.7 C (98.1 F)
2008	36.1 C (97.0 F)
2009	36.1 C (97.0 F)
2010	37.8 C (100.0 F)
2011	37.2 C (99.0 F)
2012	28.3 C (82.9 F)
2013	37.8 C (100.0 F)
2014	35.6 C (96.1 F)
2015	36.1 C (97.0 F)
2016	30.6 C (87.1 F)
2017	37.2 C (99.0 F)
2018	36.7 C (98.1 F)
2019	35.6 C (96.1 F)
2021	15.0 C (59.0 F)
2022	26.1 C (79.0 F)
2023	n/a

Coldest night (TNn)

The coldest night of the year at Chaco Canyon Natl Mon, 1909 to 2023. The record is -38.9 C (-38.0 F) in 1961, marked on the chart; the median year is -22.8 C (-9.0 F).

Coldest night (TNn) at Chaco Canyon Natl Mon by year
Year	Coldest night (TNn)
1909	n/a
1910	n/a
1912	-21.1 C (-6.0 F)
1913	-18.3 C (-0.9 F)
1922	-17.2 C (1.0 F)
1923	-16.1 C (3.0 F)
1924	-16.1 C (3.0 F)
1925	-11.7 C (10.9 F)
1932	-25.0 C (-13.0 F)
1933	-26.1 C (-15.0 F)
1934	-17.8 C (0.0 F)
1935	-20.6 C (-5.1 F)
1936	-18.3 C (-0.9 F)
1937	-31.1 C (-24.0 F)
1938	-17.2 C (1.0 F)
1939	-18.9 C (-2.0 F)
1940	-15.6 C (3.9 F)
1941	-16.1 C (3.0 F)
1942	-25.6 C (-14.1 F)
1944	-24.4 C (-11.9 F)
1945	-29.4 C (-20.9 F)
1946	-23.9 C (-11.0 F)
1947	-31.1 C (-24.0 F)
1948	-26.7 C (-16.1 F)
1949	-25.0 C (-13.0 F)
1950	-23.9 C (-11.0 F)
1951	-27.8 C (-18.0 F)
1952	-24.4 C (-11.9 F)
1953	-20.0 C (-4.0 F)
1954	-17.2 C (1.0 F)
1955	-20.6 C (-5.1 F)
1956	-22.8 C (-9.0 F)
1957	-18.3 C (-0.9 F)
1958	-21.1 C (-6.0 F)
1959	-20.6 C (-5.1 F)
1960	-22.8 C (-9.0 F)
1961	-38.9 C (-38.0 F)
1962	-29.4 C (-20.9 F)
1963	-37.2 C (-35.0 F)
1964	-26.7 C (-16.1 F)
1965	-22.2 C (-8.0 F)
1966	-28.9 C (-20.0 F)
1967	-28.3 C (-18.9 F)
1968	-24.4 C (-11.9 F)
1969	-20.6 C (-5.1 F)
1970	-25.6 C (-14.1 F)
1971	-38.3 C (-36.9 F)
1972	-22.8 C (-9.0 F)
1973	-18.9 C (-2.0 F)
1974	-25.0 C (-13.0 F)
1975	-23.9 C (-11.0 F)
1976	-37.2 C (-35.0 F)
1977	-26.1 C (-15.0 F)
1978	-31.1 C (-24.0 F)
1979	-25.6 C (-14.1 F)
1980	-19.4 C (-2.9 F)
1981	-22.2 C (-8.0 F)
1982	-28.9 C (-20.0 F)
1983	-18.9 C (-2.0 F)
1984	-23.9 C (-11.0 F)
1985	-21.7 C (-7.1 F)
1986	-25.0 C (-13.0 F)
1987	-31.1 C (-24.0 F)
1988	-23.9 C (-11.0 F)
1989	-32.2 C (-26.0 F)
1990	-38.3 C (-36.9 F)
1991	-27.2 C (-17.0 F)
1992	-26.7 C (-16.1 F)
1993	-18.9 C (-2.0 F)
1994	-22.2 C (-8.0 F)
1995	-15.6 C (3.9 F)
1996	-20.6 C (-5.1 F)
1997	-28.3 C (-18.9 F)
1998	-20.6 C (-5.1 F)
1999	-22.2 C (-8.0 F)
2000	-22.2 C (-8.0 F)
2001	-26.7 C (-16.1 F)
2002	-24.4 C (-11.9 F)
2003	-18.9 C (-2.0 F)
2004	-23.9 C (-11.0 F)
2005	-25.0 C (-13.0 F)
2006	-20.0 C (-4.0 F)
2007	-23.3 C (-9.9 F)
2008	-25.0 C (-13.0 F)
2009	-22.8 C (-9.0 F)
2010	-21.1 C (-6.0 F)
2011	-32.2 C (-26.0 F)
2012	-10.6 C (12.9 F)
2013	-22.8 C (-9.0 F)
2014	-22.2 C (-8.0 F)
2015	-17.2 C (1.0 F)
2016	-16.7 C (1.9 F)
2017	-23.9 C (-11.0 F)
2018	-17.8 C (0.0 F)
2019	-16.7 C (1.9 F)
2021	-13.9 C (7.0 F)
2022	-16.1 C (3.0 F)
2023	n/a

Wettest day (Rx1day)

The wettest day of the year at Chaco Canyon Natl Mon, 1909 to 2023. The record is 71.1 mm (2.8 in) in 1982, marked on the chart; the median year is 20.5 mm (0.8 in).

Wettest day (Rx1day) at Chaco Canyon Natl Mon by year
Year	Wettest day (Rx1day)
1909	3.8 mm (0.15 in)
1910	21.3 mm (0.8 in)
1912	7.6 mm (0.30 in)
1913	3.6 mm (0.14 in)
1922	10.9 mm (0.4 in)
1923	21.1 mm (0.8 in)
1924	16.0 mm (0.6 in)
1925	17.8 mm (0.7 in)
1932	25.4 mm (1.0 in)
1933	25.4 mm (1.0 in)
1934	31.2 mm (1.2 in)
1935	29.0 mm (1.1 in)
1936	22.9 mm (0.9 in)
1937	34.8 mm (1.4 in)
1938	19.8 mm (0.8 in)
1939	15.2 mm (0.6 in)
1940	25.1 mm (1.0 in)
1941	25.4 mm (1.0 in)
1942	17.0 mm (0.7 in)
1944	12.7 mm (0.5 in)
1945	18.8 mm (0.7 in)
1946	35.6 mm (1.4 in)
1947	33.8 mm (1.3 in)
1948	22.6 mm (0.9 in)
1949	23.1 mm (0.9 in)
1950	15.2 mm (0.6 in)
1951	14.0 mm (0.6 in)
1952	21.3 mm (0.8 in)
1953	18.5 mm (0.7 in)
1954	29.7 mm (1.2 in)
1955	20.1 mm (0.8 in)
1956	8.1 mm (0.32 in)
1957	31.8 mm (1.3 in)
1958	23.4 mm (0.9 in)
1959	21.6 mm (0.9 in)
1960	27.9 mm (1.1 in)
1961	19.8 mm (0.8 in)
1962	21.8 mm (0.9 in)
1963	17.8 mm (0.7 in)
1964	15.0 mm (0.6 in)
1965	17.3 mm (0.7 in)
1966	18.8 mm (0.7 in)
1967	30.5 mm (1.2 in)
1968	29.2 mm (1.1 in)
1969	40.6 mm (1.6 in)
1970	17.3 mm (0.7 in)
1971	23.4 mm (0.9 in)
1972	35.6 mm (1.4 in)
1973	18.3 mm (0.7 in)
1974	31.8 mm (1.3 in)
1975	9.7 mm (0.38 in)
1976	14.5 mm (0.6 in)
1977	19.8 mm (0.8 in)
1978	26.4 mm (1.0 in)
1979	34.5 mm (1.4 in)
1980	22.9 mm (0.9 in)
1981	25.4 mm (1.0 in)
1982	71.1 mm (2.8 in)
1983	17.8 mm (0.7 in)
1984	22.9 mm (0.9 in)
1985	20.8 mm (0.8 in)
1986	39.6 mm (1.6 in)
1987	19.1 mm (0.8 in)
1988	27.7 mm (1.1 in)
1989	25.9 mm (1.0 in)
1990	24.9 mm (1.0 in)
1991	26.4 mm (1.0 in)
1992	29.0 mm (1.1 in)
1993	19.1 mm (0.8 in)
1994	21.6 mm (0.9 in)
1995	19.3 mm (0.8 in)
1996	15.2 mm (0.6 in)
1997	33.0 mm (1.3 in)
1998	57.4 mm (2.3 in)
1999	17.3 mm (0.7 in)
2000	27.9 mm (1.1 in)
2001	15.2 mm (0.6 in)
2002	11.4 mm (0.4 in)
2003	40.4 mm (1.6 in)
2004	22.1 mm (0.9 in)
2005	16.8 mm (0.7 in)
2006	15.7 mm (0.6 in)
2007	19.8 mm (0.8 in)
2008	16.5 mm (0.6 in)
2009	19.3 mm (0.8 in)
2010	26.4 mm (1.0 in)
2011	15.2 mm (0.6 in)
2012	0.5 mm (0.02 in)
2013	21.6 mm (0.9 in)
2014	19.3 mm (0.8 in)
2015	20.1 mm (0.8 in)
2016	14.0 mm (0.6 in)
2017	14.2 mm (0.6 in)
2018	13.7 mm (0.5 in)
2019	21.6 mm (0.9 in)
2021	1.3 mm (0.05 in)
2022	10.2 mm (0.4 in)
2023	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chaco Canyon Natl Mon, 1909 to 2023. The record is 81.7 mm (3.2 in) in 1998, marked on the chart; the median year is 31.3 mm (1.2 in).

Wettest five days (Rx5day) at Chaco Canyon Natl Mon by year
Year	Wettest five days (Rx5day)
1909	4.4 mm (0.17 in)
1910	21.3 mm (0.8 in)
1912	7.6 mm (0.30 in)
1913	6.9 mm (0.27 in)
1922	17.8 mm (0.7 in)
1923	24.8 mm (1.0 in)
1924	18.3 mm (0.7 in)
1925	25.1 mm (1.0 in)
1932	29.5 mm (1.2 in)
1933	38.7 mm (1.5 in)
1934	37.2 mm (1.5 in)
1935	39.0 mm (1.5 in)
1936	44.0 mm (1.7 in)
1937	44.7 mm (1.8 in)
1938	38.1 mm (1.5 in)
1939	23.4 mm (0.9 in)
1940	33.1 mm (1.3 in)
1941	35.5 mm (1.4 in)
1942	29.5 mm (1.2 in)
1944	23.9 mm (0.9 in)
1945	25.2 mm (1.0 in)
1946	35.6 mm (1.4 in)
1947	44.4 mm (1.7 in)
1948	32.5 mm (1.3 in)
1949	30.2 mm (1.2 in)
1950	21.3 mm (0.8 in)
1951	25.5 mm (1.0 in)
1952	21.8 mm (0.9 in)
1953	20.0 mm (0.8 in)
1954	31.2 mm (1.2 in)
1955	21.9 mm (0.9 in)
1956	13.7 mm (0.5 in)
1957	42.4 mm (1.7 in)
1958	42.2 mm (1.7 in)
1959	25.7 mm (1.0 in)
1960	50.2 mm (2.0 in)
1961	31.3 mm (1.2 in)
1962	52.1 mm (2.1 in)
1963	26.7 mm (1.1 in)
1964	26.2 mm (1.0 in)
1965	29.0 mm (1.1 in)
1966	43.2 mm (1.7 in)
1967	39.4 mm (1.6 in)
1968	41.3 mm (1.6 in)
1969	47.5 mm (1.9 in)
1970	28.9 mm (1.1 in)
1971	50.6 mm (2.0 in)
1972	74.2 mm (2.9 in)
1973	23.7 mm (0.9 in)
1974	49.0 mm (1.9 in)
1975	22.7 mm (0.9 in)
1976	23.6 mm (0.9 in)
1977	32.3 mm (1.3 in)
1978	54.3 mm (2.1 in)
1979	47.1 mm (1.9 in)
1980	34.1 mm (1.3 in)
1981	37.6 mm (1.5 in)
1982	76.5 mm (3.0 in)
1983	38.4 mm (1.5 in)
1984	24.4 mm (1.0 in)
1985	39.6 mm (1.6 in)
1986	68.3 mm (2.7 in)
1987	27.4 mm (1.1 in)
1988	32.0 mm (1.3 in)
1989	43.4 mm (1.7 in)
1990	24.9 mm (1.0 in)
1991	40.1 mm (1.6 in)
1992	35.1 mm (1.4 in)
1993	53.4 mm (2.1 in)
1994	30.7 mm (1.2 in)
1995	23.1 mm (0.9 in)
1996	30.8 mm (1.2 in)
1997	38.5 mm (1.5 in)
1998	81.7 mm (3.2 in)
1999	32.6 mm (1.3 in)
2000	44.9 mm (1.8 in)
2001	38.1 mm (1.5 in)
2002	29.9 mm (1.2 in)
2003	49.8 mm (2.0 in)
2004	40.9 mm (1.6 in)
2005	31.3 mm (1.2 in)
2006	32.8 mm (1.3 in)
2007	33.1 mm (1.3 in)
2008	23.9 mm (0.9 in)
2009	19.6 mm (0.8 in)
2010	53.1 mm (2.1 in)
2011	27.4 mm (1.1 in)
2012	0.5 mm (0.02 in)
2013	27.2 mm (1.1 in)
2014	27.9 mm (1.1 in)
2015	26.0 mm (1.0 in)
2016	17.6 mm (0.7 in)
2017	32.8 mm (1.3 in)
2018	16.5 mm (0.6 in)
2019	27.7 mm (1.1 in)
2021	1.3 mm (0.05 in)
2022	15.3 mm (0.6 in)
2023	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chaco Canyon Natl Mon, 1909 to 2023. The record is 117 days in 1974, marked on the chart; the median year is 46 days.

Longest dry spell (CDD) at Chaco Canyon Natl Mon by year
Year	Longest dry spell (CDD)
1909	11 days
1910	82 days
1912	91 days
1913	32 days
1922	44 days
1923	53 days
1924	27 days
1925	24 days
1932	49 days
1933	109 days
1934	34 days
1935	62 days
1936	26 days
1937	55 days
1938	46 days
1939	42 days
1940	89 days
1941	34 days
1942	62 days
1944	32 days
1945	49 days
1946	52 days
1947	30 days
1948	49 days
1949	51 days
1950	60 days
1951	73 days
1952	41 days
1953	44 days
1954	56 days
1955	76 days
1956	65 days
1957	31 days
1958	30 days
1959	89 days
1960	41 days
1961	50 days
1962	85 days
1963	58 days
1964	40 days
1965	35 days
1966	51 days
1967	70 days
1968	36 days
1969	21 days
1970	45 days
1971	107 days
1972	98 days
1973	51 days
1974	117 days
1975	33 days
1976	36 days
1977	38 days
1978	37 days
1979	64 days
1980	53 days
1981	54 days
1982	52 days
1983	36 days
1984	67 days
1985	35 days
1986	36 days
1987	29 days
1988	36 days
1989	87 days
1990	35 days
1991	47 days
1992	36 days
1993	47 days
1994	32 days
1995	38 days
1996	105 days
1997	34 days
1998	68 days
1999	92 days
2000	67 days
2001	56 days
2002	63 days
2003	83 days
2004	78 days
2005	38 days
2006	66 days
2007	51 days
2008	44 days
2009	29 days
2010	35 days
2011	39 days
2012	31 days
2013	55 days
2014	39 days
2015	45 days
2016	28 days
2017	54 days
2018	38 days
2019	34 days
2021	15 days
2022	7 days
2023	8 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

56 years with a frost

Across 56 years with a frost, the median last spring frost at Chaco Canyon Natl Mon falls on 31 May and the median first autumn frost on 27 September, which leaves a median of 120 days between them.

Fitted over all years, the growing season changes by -1.5 days per decade at this station.

Frost dates and growing season at Chaco Canyon Natl Mon
Measure	Median, all years	Earliest period	Recent period (1977 to 2014)	Recent against earliest	Fitted trend
Last spring frost	31 May	n/a	31 May	n/a	+0.1 days per decade
First autumn frost	27 September	n/a	26 September	n/a	-1.4 days per decade
Growing days	120 days	n/a	120 days	n/a	-1.5 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

73 years, 1933 to 2019

A day with at least 21.9 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 49.9 mm (2.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Chaco Canyon Natl Mon: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	21.9 mm (0.9 in)
5 years	29.1 mm (1.1 in)
10 years	34.0 mm (1.3 in)
25 years	40.3 mm (1.6 in)
50 years	45.1 mm (1.8 in)
100 years	49.9 mm (2.0 in)	Longer than the 73 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, 73 years of values from 1933 to 2019.

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: 57.4 mm (2.3 in) in 1998; 40.6 mm (1.6 in) in 1969; 40.4 mm (1.6 in) in 2003.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Chaco Canyon Natl Mon standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chaco Canyon Natl Mon 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).