Hermosa 3 SSW Weather Records (USC00393775)

Record envelope, standing records and threshold days for Hermosa 3 SSW (USC00393775), South Dakota, United States, with 107 years of record.

Key Facts for Hermosa 3 SSW

Hermosa 3 SSW (USC00393775) is a weather station in South Dakota, United States at 43.81 latitude and -103.21 longitude, 1,044 m (3,425 ft) above sea level.
The station reports from 1906 to 2012, 107 years of record.
1,464 records set at Hermosa 3 SSW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hermosa 3 SSW tied a daily record snowfall of 2.5 cm (1.0 in) on 27 December 2012.

About the Station

Location: South Dakota, United States, 43.81 latitude, -103.21 longitude.
Elevation: 1,044 m (3,425 ft).
Period of record: 1906 to 2012, 107 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 Hermosa 3 SSW. 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 Hermosa 3 SSW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.2 C (72.0 F)	-38.3 C (-36.9 F)	n/a	n/a
Feb	23.9 C (75.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-28.3 C (-18.9 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-15.6 C (3.9 F)	n/a	n/a
May	34.4 C (93.9 F)	-8.9 C (16.0 F)	n/a	n/a
Jun	39.4 C (102.9 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	2.2 C (36.0 F)	n/a	n/a
Aug	41.1 C (106.0 F)	-3.3 C (26.1 F)	n/a	n/a
Sep	40.0 C (104.0 F)	-10.6 C (12.9 F)	n/a	n/a
Oct	35.6 C (96.1 F)	-21.7 C (-7.1 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-25.6 C (-14.1 F)	n/a	n/a
Dec	22.8 C (73.0 F)	-32.2 C (-26.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hermosa 3 SSW still stand. 1919 holds the most, with 99.

Standing records at Hermosa 3 SSW by the year they were set
Year set	Standing records
1906	65
1907	55
1908	51
1909	76
1910	65
1911	74
1912	49
1913	53
1914	51
1915	47
1916	79
1917	63
1918	76
1919	99
1920	58
1921	61
1922	60
1923	42
1924	50
1925	61
1926	46
1927	57
1928	42
1929	43
1930	41

All-Time Record Progression

1 new records

1 all-time records were set at Hermosa 3 SSW between 18 April 1970 and 18 April 1970. Each dot is a new record.

Wettest Day of Each Month

May: 118.1 mm (4.6 in)

The wettest day on record for each calendar month at Hermosa 3 SSW. The most was 118.1 mm (4.6 in) on 24 May 1907.

Record daily precipitation for each month at Hermosa 3 SSW
Month	Record daily precipitation (mm)	Date
Jan	34.5 mm (1.4 in)	27 January 1944
Feb	23.4 mm (0.9 in)	22 February 1914
Mar	38.1 mm (1.5 in)	25 March 1945
Apr	52.1 mm (2.1 in)	15 April 1917
May	118.1 mm (4.6 in)	24 May 1907
Jun	104.6 mm (4.1 in)	21 June 1947
Jul	71.4 mm (2.8 in)	2 July 1956
Aug	103.1 mm (4.1 in)	18 August 2007
Sep	75.9 mm (3.0 in)	28 September 1923
Oct	46.0 mm (1.8 in)	14 October 1980
Nov	41.9 mm (1.6 in)	27 November 1989
Dec	35.6 mm (1.4 in)	5 December 1906

Period of Record Coverage

1906 to 1930

25 years of record at Hermosa 3 SSW, 1906 to 1930. 4 years have data for under 90 percent of days and are left out of rankings: 1910, 1928, 1929, 1930.

Days with data per year at Hermosa 3 SSW
Year	Days with data	Share of year	Complete
1906	352	96%	Yes
1907	339	93%	Yes
1908	364	99%	Yes
1909	362	99%	Yes
1910	311	85%	No
1911	347	95%	Yes
1912	355	97%	Yes
1913	335	92%	Yes
1914	342	94%	Yes
1915	364	100%	Yes
1916	358	98%	Yes
1917	360	99%	Yes
1918	339	93%	Yes
1919	332	91%	Yes
1920	361	99%	Yes
1921	365	100%	Yes
1922	364	100%	Yes
1923	365	100%	Yes
1924	365	100%	Yes
1925	337	92%	Yes
1926	362	99%	Yes
1927	358	98%	Yes
1928	325	89%	No
1929	311	85%	No
1930	216	59%	No

Latest Records

Latest records at Hermosa 3 SSW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 December 2012	Hermosa 3 SSW, US	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	44 years	5 of 100 (Routine)
25 December 2012	Hermosa 3 SSW, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	48 years	6 of 100 (Routine)
9 December 2012	Hermosa 3 SSW, US	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	103 years	10 of 100 (Routine)
21 November 2011	Hermosa 3 SSW, US	daily snow depth	15.2 cm (6.0 in)	2.5 cm (1.0 in)	89 years	41 of 100 (Notable)
20 November 2011	Hermosa 3 SSW, US	monthly snow depth (Tie)	22.9 cm (9.0 in)	tie	13 years	5 of 100 (Routine)
19 November 2011	Hermosa 3 SSW, US	daily rain	11.4 mm (0.4 in)	2.8 mm (0.11 in)	64 years	20 of 100 (Routine)
7 October 2011	Hermosa 3 SSW, US	daily rain	15.5 mm (0.6 in)	0.5 mm (0.02 in)	101 years	20 of 100 (Routine)
30 August 2011	Hermosa 3 SSW, US	daily rain	18.8 mm (0.7 in)	1.8 mm (0.07 in)	44 years	20 of 100 (Routine)
26 July 2011	Hermosa 3 SSW, US	daily rain	68.8 mm (2.7 in)	28.7 mm (1.1 in)	46 years	55 of 100 (Notable)
30 May 2011	Hermosa 3 SSW, US	daily rain	25.7 mm (1.0 in)	0.3 mm (0.01 in)	88 years	36 of 100 (Notable)
20 May 2011	Hermosa 3 SSW, US	daily rain	64.5 mm (2.5 in)	16.5 mm (0.6 in)	94 years	52 of 100 (Notable)
16 April 2011	Hermosa 3 SSW, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	104 years	20 of 100 (Routine)
16 April 2011	Hermosa 3 SSW, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	10 years	3 of 100 (Routine)
26 March 2011	Hermosa 3 SSW, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	36 years	24 of 100 (Routine)
8 March 2011	Hermosa 3 SSW, US	daily snow depth	25.4 cm (10.0 in)	7.6 cm (3.0 in)	16 years	25 of 100 (Routine)
27 February 2011	Hermosa 3 SSW, US	daily snow depth	30.5 cm (12.0 in)	17.8 cm (7.0 in)	9 years	41 of 100 (Notable)
26 February 2011	Hermosa 3 SSW, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	95 years	50 of 100 (Notable)
26 February 2011	Hermosa 3 SSW, US	monthly snow depth	35.6 cm (14.0 in)	5.1 cm (2.0 in)	10 years	31 of 100 (Routine)
25 February 2011	Hermosa 3 SSW, US	daily snow depth	27.9 cm (11.0 in)	15.2 cm (6.0 in)	32 years	44 of 100 (Notable)
24 February 2011	Hermosa 3 SSW, US	daily snow depth	25.4 cm (10.0 in)	12.7 cm (5.0 in)	57 years	48 of 100 (Notable)

Climate Trend

16 complete years, 1906 to 1927

One stripe for each of 16 complete years at Hermosa 3 SSW, 1906 to 1927. Blue stripes are years cooler than the station's own mean of 7.9 C (46.1 F); red stripes are warmer. The coolest year was 1916, at 6.4 C (43.4 F), and the warmest was 1921, at 9.6 C (49.3 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Hermosa 3 SSW as warming stripes, 1906 to 1927
Year	Annual mean temperature	Difference from the station mean
1906	8.4 C	+0.52 C
1907	7.5 C	-0.33 C
1908	8.7 C	+0.81 C
1909	7.7 C	-0.15 C
1911	8.9 C	+1.03 C
1912	7.6 C	-0.30 C
1915	7.1 C	-0.77 C
1916	6.4 C	-1.50 C
1917	6.6 C	-1.29 C
1920	7.1 C	-0.78 C
1921	9.6 C	+1.76 C
1922	8.3 C	+0.39 C
1923	8.2 C	+0.33 C
1924	7.3 C	-0.61 C
1926	9.3 C	+1.43 C
1927	7.3 C	-0.58 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

1906 to 2012

Yearly extremes at Hermosa 3 SSW: 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)	1914	38.9 C (102.0 F)	25
Coldest night (TNn)	-38.3 C (-36.9 F)	1916	-30.6 C (-23.1 F)	25
Wettest day (Rx1day)	118.1 mm (4.6 in)	1907	37.6 mm (1.5 in)	97
Wettest five days (Rx5day)	127.7 mm (5.0 in)	1947	59.2 mm (2.3 in)	97
Longest dry spell (CDD)	91 days	1958	39 days	97

Hottest day (TXx)

The hottest day of the year at Hermosa 3 SSW, 1906 to 2012. The record is 41.1 C (106.0 F) in 1914, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Hermosa 3 SSW by year
Year	Hottest day (TXx)
1906	37.8 C (100.0 F)
1907	35.6 C (96.1 F)
1908	40.0 C (104.0 F)
1909	38.3 C (100.9 F)
1910	40.6 C (105.1 F)
1911	39.4 C (102.9 F)
1912	37.2 C (99.0 F)
1913	37.8 C (100.0 F)
1914	41.1 C (106.0 F)
1915	35.0 C (95.0 F)
1916	38.9 C (102.0 F)
1917	40.6 C (105.1 F)
1918	36.7 C (98.1 F)
1919	40.0 C (104.0 F)
1920	38.9 C (102.0 F)
1921	38.9 C (102.0 F)
1922	39.4 C (102.9 F)
1923	35.6 C (96.1 F)
1924	38.3 C (100.9 F)
1925	37.2 C (99.0 F)
1926	41.1 C (106.0 F)
1927	35.6 C (96.1 F)
1928	36.1 C (97.0 F)
1929	40.6 C (105.1 F)
1930	40.0 C (104.0 F)
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	n/a
2012	n/a

Coldest night (TNn)

The coldest night of the year at Hermosa 3 SSW, 1906 to 2012. The record is -38.3 C (-36.9 F) in 1916, marked on the chart; the median year is -30.6 C (-23.1 F).

Coldest night (TNn) at Hermosa 3 SSW by year
Year	Coldest night (TNn)
1906	-28.3 C (-18.9 F)
1907	-31.1 C (-24.0 F)
1908	-28.9 C (-20.0 F)
1909	-30.0 C (-22.0 F)
1910	-27.8 C (-18.0 F)
1911	-30.0 C (-22.0 F)
1912	-32.2 C (-26.0 F)
1913	-31.7 C (-25.1 F)
1914	-32.2 C (-26.0 F)
1915	-30.6 C (-23.1 F)
1916	-38.3 C (-36.9 F)
1917	-33.9 C (-29.0 F)
1918	-37.2 C (-35.0 F)
1919	-31.7 C (-25.1 F)
1920	-27.8 C (-18.0 F)
1921	-24.4 C (-11.9 F)
1922	-31.1 C (-24.0 F)
1923	-28.9 C (-20.0 F)
1924	-32.8 C (-27.0 F)
1925	-23.9 C (-11.0 F)
1926	-27.8 C (-18.0 F)
1927	-30.0 C (-22.0 F)
1928	-29.4 C (-20.9 F)
1929	-30.6 C (-23.1 F)
1930	-37.8 C (-36.0 F)
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	n/a
2012	n/a

Wettest day (Rx1day)

The wettest day of the year at Hermosa 3 SSW, 1906 to 2012. The record is 118.1 mm (4.6 in) in 1907, marked on the chart; the median year is 37.6 mm (1.5 in).

Wettest day (Rx1day) at Hermosa 3 SSW by year
Year	Wettest day (Rx1day)
1906	35.6 mm (1.4 in)
1907	118.1 mm (4.6 in)
1908	63.5 mm (2.5 in)
1909	42.9 mm (1.7 in)
1910	30.5 mm (1.2 in)
1911	31.2 mm (1.2 in)
1912	30.2 mm (1.2 in)
1913	71.9 mm (2.8 in)
1914	23.4 mm (0.9 in)
1915	51.3 mm (2.0 in)
1916	48.0 mm (1.9 in)
1917	52.1 mm (2.1 in)
1918	30.5 mm (1.2 in)
1919	27.9 mm (1.1 in)
1920	58.4 mm (2.3 in)
1921	57.7 mm (2.3 in)
1922	33.0 mm (1.3 in)
1923	75.9 mm (3.0 in)
1924	34.5 mm (1.4 in)
1925	61.0 mm (2.4 in)
1926	46.5 mm (1.8 in)
1927	39.6 mm (1.6 in)
1928	45.5 mm (1.8 in)
1929	54.6 mm (2.1 in)
1930	56.9 mm (2.2 in)
1941	18.3 mm (0.7 in)
1942	28.4 mm (1.1 in)
1943	45.0 mm (1.8 in)
1944	34.5 mm (1.4 in)
1945	49.8 mm (2.0 in)
1946	56.9 mm (2.2 in)
1947	104.6 mm (4.1 in)
1948	35.6 mm (1.4 in)
1949	30.5 mm (1.2 in)
1950	30.5 mm (1.2 in)
1951	35.6 mm (1.4 in)
1952	77.2 mm (3.0 in)
1953	42.9 mm (1.7 in)
1954	25.9 mm (1.0 in)
1955	41.1 mm (1.6 in)
1956	71.4 mm (2.8 in)
1957	34.5 mm (1.4 in)
1958	37.6 mm (1.5 in)
1959	24.4 mm (1.0 in)
1960	11.7 mm (0.5 in)
1961	36.6 mm (1.4 in)
1962	65.0 mm (2.6 in)
1963	52.1 mm (2.1 in)
1964	40.1 mm (1.6 in)
1965	73.7 mm (2.9 in)
1966	36.3 mm (1.4 in)
1967	37.6 mm (1.5 in)
1968	33.8 mm (1.3 in)
1969	42.4 mm (1.7 in)
1970	52.1 mm (2.1 in)
1971	27.9 mm (1.1 in)
1972	71.4 mm (2.8 in)
1973	39.9 mm (1.6 in)
1974	36.1 mm (1.4 in)
1975	42.7 mm (1.7 in)
1976	99.8 mm (3.9 in)
1977	24.4 mm (1.0 in)
1978	24.6 mm (1.0 in)
1979	36.8 mm (1.4 in)
1980	46.0 mm (1.8 in)
1981	11.9 mm (0.5 in)
1982	19.1 mm (0.8 in)
1983	45.7 mm (1.8 in)
1984	35.6 mm (1.4 in)
1985	57.2 mm (2.3 in)
1986	49.5 mm (1.9 in)
1987	21.1 mm (0.8 in)
1988	31.8 mm (1.3 in)
1989	41.9 mm (1.6 in)
1990	57.2 mm (2.3 in)
1991	35.3 mm (1.4 in)
1992	28.2 mm (1.1 in)
1993	38.9 mm (1.5 in)
1994	29.5 mm (1.2 in)
1995	32.3 mm (1.3 in)
1996	36.1 mm (1.4 in)
1997	37.6 mm (1.5 in)
1998	35.8 mm (1.4 in)
1999	69.3 mm (2.7 in)
2000	51.3 mm (2.0 in)
2001	32.5 mm (1.3 in)
2002	23.4 mm (0.9 in)
2003	40.1 mm (1.6 in)
2004	22.6 mm (0.9 in)
2005	31.0 mm (1.2 in)
2006	20.6 mm (0.8 in)
2007	103.1 mm (4.1 in)
2008	62.2 mm (2.4 in)
2009	46.2 mm (1.8 in)
2010	37.6 mm (1.5 in)
2011	68.8 mm (2.7 in)
2012	22.4 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hermosa 3 SSW, 1906 to 2012. The record is 127.7 mm (5.0 in) in 1947, marked on the chart; the median year is 59.2 mm (2.3 in).

Wettest five days (Rx5day) at Hermosa 3 SSW by year
Year	Wettest five days (Rx5day)
1906	70.9 mm (2.8 in)
1907	51.1 mm (2.0 in)
1908	104.1 mm (4.1 in)
1909	80.6 mm (3.2 in)
1910	57.2 mm (2.3 in)
1911	34.1 mm (1.3 in)
1912	64.3 mm (2.5 in)
1913	90.1 mm (3.5 in)
1914	33.5 mm (1.3 in)
1915	70.7 mm (2.8 in)
1916	53.8 mm (2.1 in)
1917	72.3 mm (2.8 in)
1918	68.3 mm (2.7 in)
1919	33.5 mm (1.3 in)
1920	116.2 mm (4.6 in)
1921	91.4 mm (3.6 in)
1922	55.3 mm (2.2 in)
1923	98.1 mm (3.9 in)
1924	50.0 mm (2.0 in)
1925	107.5 mm (4.2 in)
1926	87.3 mm (3.4 in)
1927	89.7 mm (3.5 in)
1928	66.6 mm (2.6 in)
1929	77.6 mm (3.1 in)
1930	56.9 mm (2.2 in)
1941	31.2 mm (1.2 in)
1942	62.2 mm (2.4 in)
1943	62.3 mm (2.5 in)
1944	45.2 mm (1.8 in)
1945	71.4 mm (2.8 in)
1946	93.5 mm (3.7 in)
1947	127.7 mm (5.0 in)
1948	47.0 mm (1.9 in)
1949	44.4 mm (1.7 in)
1950	30.5 mm (1.2 in)
1951	52.6 mm (2.1 in)
1952	95.3 mm (3.8 in)
1953	52.5 mm (2.1 in)
1954	41.6 mm (1.6 in)
1955	56.1 mm (2.2 in)
1956	83.1 mm (3.3 in)
1957	62.2 mm (2.4 in)
1958	42.1 mm (1.7 in)
1959	49.5 mm (1.9 in)
1960	11.7 mm (0.5 in)
1961	43.2 mm (1.7 in)
1962	88.3 mm (3.5 in)
1963	56.9 mm (2.2 in)
1964	50.1 mm (2.0 in)
1965	92.2 mm (3.6 in)
1966	65.5 mm (2.6 in)
1967	121.2 mm (4.8 in)
1968	71.9 mm (2.8 in)
1969	64.0 mm (2.5 in)
1970	74.2 mm (2.9 in)
1971	59.2 mm (2.3 in)
1972	71.4 mm (2.8 in)
1973	53.1 mm (2.1 in)
1974	45.8 mm (1.8 in)
1975	68.6 mm (2.7 in)
1976	113.0 mm (4.4 in)
1977	47.3 mm (1.9 in)
1978	32.5 mm (1.3 in)
1979	54.5 mm (2.1 in)
1980	62.0 mm (2.4 in)
1981	15.2 mm (0.6 in)
1982	28.5 mm (1.1 in)
1983	45.7 mm (1.8 in)
1984	57.9 mm (2.3 in)
1985	57.2 mm (2.3 in)
1986	85.1 mm (3.4 in)
1987	44.5 mm (1.8 in)
1988	53.4 mm (2.1 in)
1989	58.5 mm (2.3 in)
1990	121.1 mm (4.8 in)
1991	80.5 mm (3.2 in)
1992	40.1 mm (1.6 in)
1993	65.5 mm (2.6 in)
1994	44.0 mm (1.7 in)
1995	89.1 mm (3.5 in)
1996	100.6 mm (4.0 in)
1997	85.8 mm (3.4 in)
1998	69.5 mm (2.7 in)
1999	71.6 mm (2.8 in)
2000	57.9 mm (2.3 in)
2001	40.7 mm (1.6 in)
2002	49.8 mm (2.0 in)
2003	50.8 mm (2.0 in)
2004	29.7 mm (1.2 in)
2005	50.8 mm (2.0 in)
2006	36.1 mm (1.4 in)
2007	106.4 mm (4.2 in)
2008	122.4 mm (4.8 in)
2009	56.2 mm (2.2 in)
2010	76.3 mm (3.0 in)
2011	90.2 mm (3.6 in)
2012	28.5 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hermosa 3 SSW, 1906 to 2012. The record is 91 days in 1958, marked on the chart; the median year is 39 days.

Longest dry spell (CDD) at Hermosa 3 SSW by year
Year	Longest dry spell (CDD)
1906	36 days
1907	68 days
1908	47 days
1909	48 days
1910	27 days
1911	29 days
1912	36 days
1913	30 days
1914	44 days
1915	51 days
1916	30 days
1917	50 days
1918	24 days
1919	50 days
1920	50 days
1921	76 days
1922	51 days
1923	56 days
1924	22 days
1925	44 days
1926	70 days
1927	22 days
1928	80 days
1929	18 days
1930	31 days
1941	48 days
1942	42 days
1943	37 days
1944	39 days
1945	38 days
1946	85 days
1947	31 days
1948	39 days
1949	21 days
1950	59 days
1951	19 days
1952	38 days
1953	48 days
1954	34 days
1955	26 days
1956	23 days
1957	43 days
1958	91 days
1959	62 days
1960	22 days
1961	61 days
1962	45 days
1963	28 days
1964	41 days
1965	37 days
1966	22 days
1967	35 days
1968	24 days
1969	38 days
1970	25 days
1971	32 days
1972	24 days
1973	43 days
1974	45 days
1975	67 days
1976	49 days
1977	16 days
1978	42 days
1979	26 days
1980	25 days
1981	17 days
1982	12 days
1983	29 days
1984	64 days
1985	49 days
1986	70 days
1987	48 days
1988	45 days
1989	32 days
1990	48 days
1991	49 days
1992	39 days
1993	25 days
1994	29 days
1995	34 days
1996	39 days
1997	55 days
1998	52 days
1999	45 days
2000	32 days
2001	38 days
2002	50 days
2003	22 days
2004	60 days
2005	37 days
2006	48 days
2007	53 days
2008	26 days
2009	24 days
2010	27 days
2011	19 days
2012	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.

Rainfall Return Levels

69 years, 1906 to 2011

A day with at least 40.3 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 107.0 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Hermosa 3 SSW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.3 mm (1.6 in)
5 years	55.1 mm (2.2 in)
10 years	66.1 mm (2.6 in)
25 years	81.3 mm (3.2 in)
50 years	93.7 mm (3.7 in)
100 years	107.0 mm (4.2 in)	Longer than the 69 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, 69 years of values from 1906 to 2011.

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: 103.1 mm (4.1 in) in 2007; 99.8 mm (3.9 in) in 1976; 75.9 mm (3.0 in) in 1923.

Download the Data

Data for Hermosa 3 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hermosa 3 SSW 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).