Dalhart Exp STN Weather Records (USC00412239)

Record envelope, standing records and threshold days for Dalhart Exp STN (USC00412239), Texas, United States, with 49 years of record.

Key Facts for Dalhart Exp STN

Dalhart Exp STN (USC00412239) is a weather station in Texas, United States at 36.02 latitude and -102.58 longitude, 1,220 m (4,003 ft) above sea level.
The station reports from 1905 to 1953, 49 years of record.
1,464 records set at Dalhart Exp STN still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Dalhart Exp STN tied a daily record high minimum temperature of -1.7 C (28.9 F) on 21 December 1953.

About the Station

Location: Texas, United States, 36.02 latitude, -102.58 longitude.
Elevation: 1,220 m (4,003 ft).
Period of record: 1905 to 1953, 49 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 Dalhart Exp STN. 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 Dalhart Exp STN, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	26.7 C (80.1 F)	-27.2 C (-17.0 F)	n/a	n/a
Feb	27.2 C (81.0 F)	-28.3 C (-18.9 F)	n/a	n/a
Mar	36.1 C (97.0 F)	-23.3 C (-9.9 F)	n/a	n/a
Apr	34.4 C (93.9 F)	-12.8 C (9.0 F)	n/a	n/a
May	38.3 C (100.9 F)	-7.8 C (18.0 F)	n/a	n/a
Jun	42.2 C (108.0 F)	2.2 C (36.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	2.8 C (37.0 F)	n/a	n/a
Aug	41.1 C (106.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	43.3 C (109.9 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-11.7 C (10.9 F)	n/a	n/a
Nov	30.0 C (86.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Dec	29.4 C (84.9 F)	-23.3 C (-9.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Dalhart Exp STN still stand. 1911 holds the most, with 62.

Standing records at Dalhart Exp STN by the year they were set
Year set	Standing records
1906	37
1907	58
1908	14
1909	20
1910	42
1911	62
1912	33
1913	31
1914	26
1915	29
1916	42
1917	37
1918	36
1919	31
1920	26
1921	30
1922	31
1923	24
1924	40
1925	41
1926	23
1927	49
1928	25
1929	27
1930	21
1931	23
1932	32
1933	31
1934	45
1935	16
1936	34
1937	24
1938	22
1939	22
1940	32
1941	16
1942	22
1943	23
1944	18
1945	23
1946	26
1947	17
1948	32
1949	21
1950	34
1951	34
1952	36
1953	46

All-Time Record Progression

2 new records

2 all-time records were set at Dalhart Exp STN between 26 December 1939 and 1 February 1951. Each dot is a new record.

When Dalhart Exp STN set new all-time records
Date	Kind	Detail
1939-12-26	Record snow depth	Record snow depth 22.9 cm (9.0 in)
1951-02-01	Record low minimum temperature	Record low minimum temperature -28.3 C (-18.9 F)

Wettest Day of Each Month

Aug: 112.0 mm (4.4 in)

The wettest day on record for each calendar month at Dalhart Exp STN. The most was 112.0 mm (4.4 in) on 17 August 1923.

Record daily precipitation for each month at Dalhart Exp STN
Month	Record daily precipitation (mm)	Date
Jan	46.5 mm (1.8 in)	8 January 1939
Feb	31.0 mm (1.2 in)	27 February 1948
Mar	47.0 mm (1.9 in)	22 March 1918
Apr	79.0 mm (3.1 in)	30 April 1914
May	73.7 mm (2.9 in)	28 May 1922
Jun	88.9 mm (3.5 in)	4 June 1932
Jul	95.0 mm (3.7 in)	25 July 1941
Aug	112.0 mm (4.4 in)	17 August 1923
Sep	76.2 mm (3.0 in)	16 September 1919
Oct	101.6 mm (4.0 in)	21 October 1953
Nov	39.1 mm (1.5 in)	9 November 1905
Dec	65.5 mm (2.6 in)	4 December 1913

Period of Record Coverage

1906 to 1953

48 years of record at Dalhart Exp STN, 1906 to 1953. 6 years have data for under 90 percent of days and are left out of rankings: 1906, 1907, 1908, 1909, 1915, 1947.

Days with data per year at Dalhart Exp STN
Year	Days with data	Share of year	Complete
1906	143	39%	No
1907	297	81%	No
1908	149	41%	No
1909	292	80%	No
1910	359	98%	Yes
1911	343	94%	Yes
1912	356	97%	Yes
1913	356	98%	Yes
1914	349	96%	Yes
1915	297	81%	No
1916	353	96%	Yes
1917	362	99%	Yes
1918	355	97%	Yes
1919	347	95%	Yes
1920	352	96%	Yes
1921	359	98%	Yes
1922	354	97%	Yes
1923	351	96%	Yes
1924	354	97%	Yes
1925	357	98%	Yes
1926	358	98%	Yes
1927	357	98%	Yes
1928	356	97%	Yes
1929	354	97%	Yes
1930	358	98%	Yes
1931	357	98%	Yes
1932	361	99%	Yes
1933	359	98%	Yes
1934	358	98%	Yes
1935	360	99%	Yes
1936	357	98%	Yes
1937	354	97%	Yes
1938	355	97%	Yes
1939	357	98%	Yes
1940	355	97%	Yes
1941	355	97%	Yes
1942	358	98%	Yes
1943	357	98%	Yes
1944	362	99%	Yes
1945	354	97%	Yes
1946	354	97%	Yes
1947	196	54%	No
1948	365	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	359	98%	Yes
1952	361	99%	Yes
1953	362	99%	Yes

Latest Records

Latest records at Dalhart Exp STN
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 1953	Dalhart Exp STN, US	daily high min (Tie)	-1.7 C (28.9 F)	tie	22 years	2 of 100 (Routine)
3 December 1953	Dalhart Exp STN, US	daily rain	6.4 mm (0.25 in)	1.8 mm (0.07 in)	40 years	18 of 100 (Routine)
22 November 1953	Dalhart Exp STN, US	daily low max	-3.9 C (25.0 F)	0.6 C (1.1 F)	35 years	14 of 100 (Routine)
5 November 1953	Dalhart Exp STN, US	daily rain	4.6 mm (0.18 in)	3.8 mm (0.15 in)	20 years	14 of 100 (Routine)
21 October 1953	Dalhart Exp STN, US	monthly rain	101.6 mm (4.0 in)	23.4 mm (0.9 in)	23 years	38 of 100 (Notable)
20 October 1953	Dalhart Exp STN, US	daily high min (Tie)	11.7 C (53.1 F)	tie	35 years	3 of 100 (Routine)
14 October 1953	Dalhart Exp STN, US	daily rain	17.8 mm (0.7 in)	5.9 mm (0.23 in)	11 years	11 of 100 (Routine)
12 October 1953	Dalhart Exp STN, US	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	16 years	10 of 100 (Routine)
11 October 1953	Dalhart Exp STN, US	daily high max	32.2 C (90.0 F)	1.1 C (2.0 F)	27 years	13 of 100 (Routine)
29 September 1953	Dalhart Exp STN, US	daily high max	35.0 C (95.0 F)	1.7 C (3.1 F)	20 years	13 of 100 (Routine)
28 September 1953	Dalhart Exp STN, US	daily high max	35.6 C (96.1 F)	1.7 C (3.1 F)	42 years	19 of 100 (Routine)
27 September 1953	Dalhart Exp STN, US	daily high max (Tie)	34.4 C (93.9 F)	tie	2 years	1 of 100 (Routine)
24 September 1953	Dalhart Exp STN, US	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	20 years	12 of 100 (Routine)
17 September 1953	Dalhart Exp STN, US	daily high max	35.6 C (96.1 F)	0.6 C (1.1 F)	20 years	11 of 100 (Routine)
16 September 1953	Dalhart Exp STN, US	daily high max (Tie)	35.0 C (95.0 F)	tie	46 years	4 of 100 (Routine)
9 September 1953	Dalhart Exp STN, US	daily high max (Tie)	34.4 C (93.9 F)	tie	32 years	3 of 100 (Routine)
4 September 1953	Dalhart Exp STN, US	daily low min	6.1 C (43.0 F)	3.9 C (7.0 F)	38 years	24 of 100 (Routine)
16 August 1953	Dalhart Exp STN, US	daily rain	34.3 mm (1.4 in)	10.4 mm (0.4 in)	12 years	15 of 100 (Routine)
27 July 1953	Dalhart Exp STN, US	daily high min	20.6 C (69.1 F)	0.6 C (1.1 F)	43 years	18 of 100 (Routine)
22 July 1953	Dalhart Exp STN, US	daily high min (Tie)	20.0 C (68.0 F)	tie	36 years	3 of 100 (Routine)

Climate Trend

42 complete years, 1910 to 1953

One stripe for each of 42 complete years at Dalhart Exp STN, 1910 to 1953. Blue stripes are years cooler than the station's own mean of 12.6 C (54.7 F); red stripes are warmer. The coolest year was 1912, at 11.0 C (51.8 F), and the warmest was 1934, at 14.5 C (58.1 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Dalhart Exp STN as warming stripes, 1910 to 1953
Year	Annual mean temperature	Difference from the station mean
1910	13.2 C	+0.56 C
1911	13.0 C	+0.33 C
1912	11.0 C	-1.62 C
1913	11.9 C	-0.74 C
1914	13.2 C	+0.54 C
1916	12.6 C	+0.01 C
1917	12.1 C	-0.50 C
1918	12.2 C	-0.40 C
1919	11.6 C	-1.00 C
1920	12.1 C	-0.49 C
1921	13.3 C	+0.68 C
1922	13.0 C	+0.33 C
1923	12.1 C	-0.51 C
1924	11.5 C	-1.14 C
1925	13.1 C	+0.42 C
1926	12.3 C	-0.38 C
1927	13.0 C	+0.37 C
1928	12.2 C	-0.42 C
1929	11.5 C	-1.16 C
1930	12.6 C	-0.08 C
1931	12.9 C	+0.24 C
1932	12.1 C	-0.54 C
1933	13.9 C	+1.22 C
1934	14.5 C	+1.88 C
1935	13.1 C	+0.51 C
1936	12.9 C	+0.26 C
1937	12.7 C	+0.10 C
1938	13.4 C	+0.77 C
1939	13.0 C	+0.36 C
1940	12.9 C	+0.26 C
1941	12.4 C	-0.25 C
1942	12.1 C	-0.50 C
1943	12.5 C	-0.10 C
1944	12.0 C	-0.66 C
1945	12.7 C	+0.08 C
1946	13.7 C	+1.08 C
1948	12.2 C	-0.41 C
1949	12.3 C	-0.32 C
1950	13.0 C	+0.39 C
1951	12.2 C	-0.45 C
1952	12.9 C	+0.27 C
1953	13.7 C	+1.09 C

The fitted trend in annual mean temperature here over 1910 to 1953 is 0.13 C (-0.04 to 0.30) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Dalhart Exp STN
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.13 C (-0.04 to 0.30) per decade	0.2 F (-0.1 to 0.5) per decade	1910 to 1953	42	Not clearly different from zero
Mean daily maximum	0.1 C (-0.1 to 0.4) per decade	0.2 F (-0.2 to 0.7) per decade	1910 to 1953	42	Not clearly different from zero
Mean daily minimum	0.14 C (-0.03 to 0.30) per decade	0.2 F (-0.1 to 0.5) per decade	1910 to 1953	42	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

1905 to 1953

Yearly extremes at Dalhart Exp STN: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1907	39.4 C (102.9 F)	48
Coldest night (TNn)	-28.3 C (-18.9 F)	1951	-20.0 C (-4.0 F)	48
Wettest day (Rx1day)	112.0 mm (4.4 in)	1923	52.1 mm (2.1 in)	49
Wettest five days (Rx5day)	150.6 mm (5.9 in)	1930	78.9 mm (3.1 in)	49
Longest dry spell (CDD)	108 days	1912	46 days	49

Hottest day (TXx)

The hottest day of the year at Dalhart Exp STN, 1905 to 1953. The record is 43.3 C (109.9 F) in 1907, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Dalhart Exp STN by year
Year	Hottest day (TXx)
1905	n/a
1906	29.4 C (84.9 F)
1907	43.3 C (109.9 F)
1908	38.9 C (102.0 F)
1909	40.0 C (104.0 F)
1910	38.9 C (102.0 F)
1911	40.6 C (105.1 F)
1912	37.2 C (99.0 F)
1913	40.6 C (105.1 F)
1914	36.7 C (98.1 F)
1915	39.4 C (102.9 F)
1916	40.0 C (104.0 F)
1917	40.0 C (104.0 F)
1918	37.8 C (100.0 F)
1919	36.7 C (98.1 F)
1920	36.1 C (97.0 F)
1921	36.7 C (98.1 F)
1922	38.9 C (102.0 F)
1923	40.0 C (104.0 F)
1924	40.0 C (104.0 F)
1925	40.6 C (105.1 F)
1926	37.8 C (100.0 F)
1927	37.8 C (100.0 F)
1928	38.9 C (102.0 F)
1929	37.2 C (99.0 F)
1930	40.6 C (105.1 F)
1931	38.9 C (102.0 F)
1932	36.7 C (98.1 F)
1933	41.1 C (106.0 F)
1934	40.6 C (105.1 F)
1935	38.9 C (102.0 F)
1936	41.1 C (106.0 F)
1937	39.4 C (102.9 F)
1938	40.0 C (104.0 F)
1939	39.4 C (102.9 F)
1940	41.1 C (106.0 F)
1941	33.9 C (93.0 F)
1942	36.7 C (98.1 F)
1943	41.1 C (106.0 F)
1944	40.6 C (105.1 F)
1945	39.4 C (102.9 F)
1946	40.0 C (104.0 F)
1947	38.3 C (100.9 F)
1948	40.0 C (104.0 F)
1949	37.8 C (100.0 F)
1950	38.3 C (100.9 F)
1951	40.0 C (104.0 F)
1952	40.0 C (104.0 F)
1953	42.2 C (108.0 F)

Coldest night (TNn)

The coldest night of the year at Dalhart Exp STN, 1905 to 1953. The record is -28.3 C (-18.9 F) in 1951, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Dalhart Exp STN by year
Year	Coldest night (TNn)
1905	n/a
1906	-18.9 C (-2.0 F)
1907	-12.2 C (10.0 F)
1908	-6.7 C (19.9 F)
1909	-18.9 C (-2.0 F)
1910	-24.4 C (-11.9 F)
1911	-25.6 C (-14.1 F)
1912	-25.0 C (-13.0 F)
1913	-24.4 C (-11.9 F)
1914	-18.3 C (-0.9 F)
1915	-21.7 C (-7.1 F)
1916	-23.3 C (-9.9 F)
1917	-18.3 C (-0.9 F)
1918	-23.9 C (-11.0 F)
1919	-27.2 C (-17.0 F)
1920	-17.2 C (1.0 F)
1921	-15.6 C (3.9 F)
1922	-23.3 C (-9.9 F)
1923	-20.6 C (-5.1 F)
1924	-22.8 C (-9.0 F)
1925	-19.4 C (-2.9 F)
1926	-14.4 C (6.1 F)
1927	-20.0 C (-4.0 F)
1928	-21.7 C (-7.1 F)
1929	-22.8 C (-9.0 F)
1930	-25.0 C (-13.0 F)
1931	-13.9 C (7.0 F)
1932	-20.6 C (-5.1 F)
1933	-24.4 C (-11.9 F)
1934	-14.4 C (6.1 F)
1935	-19.4 C (-2.9 F)
1936	-20.0 C (-4.0 F)
1937	-20.0 C (-4.0 F)
1938	-17.2 C (1.0 F)
1939	-21.7 C (-7.1 F)
1940	-21.7 C (-7.1 F)
1941	-11.1 C (12.0 F)
1942	-18.9 C (-2.0 F)
1943	-27.2 C (-17.0 F)
1944	-18.9 C (-2.0 F)
1945	-17.8 C (0.0 F)
1946	-17.2 C (1.0 F)
1947	-22.8 C (-9.0 F)
1948	-22.2 C (-8.0 F)
1949	-20.0 C (-4.0 F)
1950	-22.2 C (-8.0 F)
1951	-28.3 C (-18.9 F)
1952	-18.9 C (-2.0 F)
1953	-15.6 C (3.9 F)

Wettest day (Rx1day)

The wettest day of the year at Dalhart Exp STN, 1905 to 1953. The record is 112.0 mm (4.4 in) in 1923, marked on the chart; the median year is 52.1 mm (2.1 in).

Wettest day (Rx1day) at Dalhart Exp STN by year
Year	Wettest day (Rx1day)
1905	39.1 mm (1.5 in)
1906	36.6 mm (1.4 in)
1907	38.6 mm (1.5 in)
1908	52.3 mm (2.1 in)
1909	52.1 mm (2.1 in)
1910	40.1 mm (1.6 in)
1911	51.1 mm (2.0 in)
1912	37.8 mm (1.5 in)
1913	65.5 mm (2.6 in)
1914	79.0 mm (3.1 in)
1915	58.4 mm (2.3 in)
1916	62.2 mm (2.4 in)
1917	20.6 mm (0.8 in)
1918	50.8 mm (2.0 in)
1919	76.2 mm (3.0 in)
1920	41.9 mm (1.6 in)
1921	40.1 mm (1.6 in)
1922	73.7 mm (2.9 in)
1923	112.0 mm (4.4 in)
1924	46.7 mm (1.8 in)
1925	36.8 mm (1.4 in)
1926	31.8 mm (1.3 in)
1927	52.1 mm (2.1 in)
1928	53.6 mm (2.1 in)
1929	41.9 mm (1.6 in)
1930	78.2 mm (3.1 in)
1931	31.8 mm (1.3 in)
1932	88.9 mm (3.5 in)
1933	52.3 mm (2.1 in)
1934	32.5 mm (1.3 in)
1935	51.3 mm (2.0 in)
1936	43.2 mm (1.7 in)
1937	55.6 mm (2.2 in)
1938	63.8 mm (2.5 in)
1939	46.5 mm (1.8 in)
1940	40.4 mm (1.6 in)
1941	95.0 mm (3.7 in)
1942	56.1 mm (2.2 in)
1943	68.8 mm (2.7 in)
1944	40.4 mm (1.6 in)
1945	55.1 mm (2.2 in)
1946	69.6 mm (2.7 in)
1947	65.3 mm (2.6 in)
1948	43.9 mm (1.7 in)
1949	45.0 mm (1.8 in)
1950	58.2 mm (2.3 in)
1951	72.4 mm (2.9 in)
1952	29.2 mm (1.1 in)
1953	101.6 mm (4.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Dalhart Exp STN, 1905 to 1953. The record is 150.6 mm (5.9 in) in 1930, marked on the chart; the median year is 78.9 mm (3.1 in).

Wettest five days (Rx5day) at Dalhart Exp STN by year
Year	Wettest five days (Rx5day)
1905	51.8 mm (2.0 in)
1906	45.2 mm (1.8 in)
1907	83.0 mm (3.3 in)
1908	58.9 mm (2.3 in)
1909	96.5 mm (3.8 in)
1910	58.6 mm (2.3 in)
1911	69.7 mm (2.7 in)
1912	58.2 mm (2.3 in)
1913	105.4 mm (4.1 in)
1914	120.2 mm (4.7 in)
1915	66.0 mm (2.6 in)
1916	70.8 mm (2.8 in)
1917	41.4 mm (1.6 in)
1918	81.3 mm (3.2 in)
1919	130.0 mm (5.1 in)
1920	64.0 mm (2.5 in)
1921	92.8 mm (3.7 in)
1922	84.1 mm (3.3 in)
1923	113.5 mm (4.5 in)
1924	59.5 mm (2.3 in)
1925	68.0 mm (2.7 in)
1926	61.1 mm (2.4 in)
1927	75.2 mm (3.0 in)
1928	84.2 mm (3.3 in)
1929	89.0 mm (3.5 in)
1930	150.6 mm (5.9 in)
1931	42.6 mm (1.7 in)
1932	113.3 mm (4.5 in)
1933	76.9 mm (3.0 in)
1934	36.9 mm (1.5 in)
1935	60.7 mm (2.4 in)
1936	43.2 mm (1.7 in)
1937	122.9 mm (4.8 in)
1938	97.9 mm (3.9 in)
1939	50.3 mm (2.0 in)
1940	80.0 mm (3.1 in)
1941	103.9 mm (4.1 in)
1942	78.9 mm (3.1 in)
1943	100.6 mm (4.0 in)
1944	57.1 mm (2.2 in)
1945	66.3 mm (2.6 in)
1946	95.5 mm (3.8 in)
1947	74.6 mm (2.9 in)
1948	79.7 mm (3.1 in)
1949	88.2 mm (3.5 in)
1950	82.3 mm (3.2 in)
1951	72.4 mm (2.9 in)
1952	85.4 mm (3.4 in)
1953	108.8 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Dalhart Exp STN, 1905 to 1953. The record is 108 days in 1912, marked on the chart; the median year is 46 days.

Longest dry spell (CDD) at Dalhart Exp STN by year
Year	Longest dry spell (CDD)
1905	19 days
1906	38 days
1907	78 days
1908	31 days
1909	25 days
1910	102 days
1911	46 days
1912	108 days
1913	37 days
1914	87 days
1915	76 days
1916	69 days
1917	54 days
1918	37 days
1919	35 days
1920	54 days
1921	34 days
1922	33 days
1923	34 days
1924	29 days
1925	26 days
1926	46 days
1927	52 days
1928	35 days
1929	40 days
1930	56 days
1931	32 days
1932	23 days
1933	57 days
1934	42 days
1935	54 days
1936	94 days
1937	50 days
1938	48 days
1939	51 days
1940	40 days
1941	40 days
1942	59 days
1943	63 days
1944	22 days
1945	49 days
1946	48 days
1947	32 days
1948	60 days
1949	45 days
1950	103 days
1951	59 days
1952	47 days
1953	45 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

42 years with a frost

Across 42 years with a frost, the median last spring frost at Dalhart Exp STN falls on 24 April and the median first autumn frost on 18 October, which leaves a median of 178 days between them.

Fitted over all years, the growing season changes by -0.8 days per decade at this station.

Frost dates and growing season at Dalhart Exp STN
Measure	Median, all years	Earliest period	Recent period (1923 to 1953)	Recent against earliest	Fitted trend
Last spring frost	24 April	n/a	23 April	n/a	-0.3 days per decade
First autumn frost	18 October	n/a	16 October	n/a	-1.2 days per decade
Growing days	178 days	n/a	178 days	n/a	-0.8 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

43 years, 1907 to 1953

A day with at least 51.2 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 124.7 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Dalhart Exp STN: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	51.2 mm (2.0 in)
5 years	69.5 mm (2.7 in)
10 years	82.1 mm (3.2 in)
25 years	98.8 mm (3.9 in)
50 years	111.6 mm (4.4 in)	Longer than the 43 years of record
100 years	124.7 mm (4.9 in)	Longer than the 43 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, 43 years of values from 1907 to 1953.

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: 112.0 mm (4.4 in) in 1923; 101.6 mm (4.0 in) in 1953; 95.0 mm (3.7 in) in 1941.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Dalhart Exp STN, at 1931 and 1945. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1931 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1945 ran 0.3 C (0.5 F) higher than in the years before (possible change).

Suspected changes in the annual mean temperature at Dalhart Exp STN, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1931	-0.3	-0.5	possible	5
1945	+0.3	+0.5	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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

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