Upper Mattole Weather Records (USC00049177)

Record envelope, standing records and threshold days for Upper Mattole (USC00049177), California, United States, with 94 years of record.

Key Facts for Upper Mattole

Upper Mattole (USC00049177) is a weather station in California, United States at 40.25 latitude and -124.18 longitude, 78 m (255 ft) above sea level.
The station reports from 1893 to 1986, 94 years of record.
482 records set at Upper Mattole still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Upper Mattole set a daily record precipitation of 60.7 mm (2.4 in) on 7 March 1986.

About the Station

Location: California, United States, 40.25 latitude, -124.18 longitude.
Elevation: 78 m (255 ft).
Period of record: 1893 to 1986, 94 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 Upper Mattole. 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 Upper Mattole, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	27.8 C (82.0 F)	1.1 C (34.0 F)	n/a	n/a
May	24.4 C (75.9 F)	4.4 C (39.9 F)	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	25.6 C (78.1 F)	8.9 C (48.0 F)	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	27.8 C (82.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	n/a	7.8 C (46.0 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-3.3 C (26.1 F)	n/a	n/a

Which Years Hold Standing Records

482 standing records

482 records at Upper Mattole still stand. 1898 holds the most, with 244.

All-Time Record Progression

2 new records

2 all-time records were set at Upper Mattole between 29 November 1932 and 10 December 1939. Each dot is a new record.

When Upper Mattole set new all-time records
Date	Kind	Detail
1932-11-29	Record daily precipitation	Record daily precipitation 236.2 mm (9.3 in)
1939-12-10	Record daily precipitation	Record daily precipitation 237.5 mm (9.4 in)

Wettest Day of Each Month

Dec: 237.5 mm (9.4 in)

The wettest day on record for each calendar month at Upper Mattole. The most was 237.5 mm (9.4 in) on 10 December 1939.

Record daily precipitation for each month at Upper Mattole
Month	Record daily precipitation (mm)	Date
Jan	228.6 mm (9.0 in)	14 January 1894
Feb	221.0 mm (8.7 in)	2 February 1915
Mar	188.5 mm (7.4 in)	18 March 1907
Apr	175.3 mm (6.9 in)	12 April 1963
May	90.2 mm (3.6 in)	25 May 1942
Jun	64.5 mm (2.5 in)	10 June 1906
Jul	57.9 mm (2.3 in)	26 July 1947
Aug	93.2 mm (3.7 in)	30 August 1983
Sep	188.2 mm (7.4 in)	12 September 1895
Oct	201.7 mm (7.9 in)	28 October 1950
Nov	236.2 mm (9.3 in)	29 November 1932
Dec	237.5 mm (9.4 in)	10 December 1939

Period of Record Coverage

1893 to 1969

4 years of record at Upper Mattole, 1893 to 1969. 4 years have data for under 90 percent of days and are left out of rankings: 1893, 1898, 1968, 1969.

Latest Records

Latest records at Upper Mattole
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 March 1986	Upper Mattole, US	daily rain	60.7 mm (2.4 in)	28.7 mm (1.1 in)	25 years	28 of 100 (Routine)
29 May 1985	Upper Mattole, US	daily rain	16.3 mm (0.6 in)	6.1 mm (0.24 in)	62 years	20 of 100 (Routine)
12 November 1984	Upper Mattole, US	daily rain	184.7 mm (7.3 in)	90.7 mm (3.6 in)	58 years	56 of 100 (Notable)
2 November 1984	Upper Mattole, US	daily rain	105.9 mm (4.2 in)	70.3 mm (2.8 in)	66 years	52 of 100 (Notable)
25 December 1983	Upper Mattole, US	daily rain	98.6 mm (3.9 in)	5.6 mm (0.22 in)	76 years	33 of 100 (Routine)
7 December 1983	Upper Mattole, US	daily rain	87.6 mm (3.4 in)	5.8 mm (0.23 in)	76 years	33 of 100 (Routine)
1 September 1983	Upper Mattole, US	daily rain	12.7 mm (0.5 in)	7.6 mm (0.30 in)	38 years	20 of 100 (Routine)
31 August 1983	Upper Mattole, US	daily rain	47.0 mm (1.9 in)	35.8 mm (1.4 in)	12 years	41 of 100 (Notable)
30 August 1983	Upper Mattole, US	monthly rain	93.2 mm (3.7 in)	41.9 mm (1.6 in)	29 years	61 of 100 (Major)
2 July 1983	Upper Mattole, US	daily rain	8.4 mm (0.33 in)	6.9 mm (0.27 in)	62 years	20 of 100 (Routine)
1 July 1983	Upper Mattole, US	daily rain	16.3 mm (0.6 in)	14.3 mm (0.6 in)	62 years	20 of 100 (Routine)
23 April 1983	Upper Mattole, US	daily rain	91.7 mm (3.6 in)	52.8 mm (2.1 in)	86 years	63 of 100 (Major)
24 March 1983	Upper Mattole, US	daily rain	76.7 mm (3.0 in)	38.1 mm (1.5 in)	44 years	38 of 100 (Notable)
13 March 1983	Upper Mattole, US	daily rain	67.3 mm (2.6 in)	3.0 mm (0.12 in)	44 years	23 of 100 (Routine)
26 January 1983	Upper Mattole, US	daily rain	115.1 mm (4.5 in)	23.7 mm (0.9 in)	12 years	20 of 100 (Routine)
15 December 1982	Upper Mattole, US	daily rain	150.6 mm (5.9 in)	43.9 mm (1.7 in)	13 years	28 of 100 (Routine)
18 November 1982	Upper Mattole, US	daily rain	87.6 mm (3.4 in)	1.2 mm (0.05 in)	36 years	19 of 100 (Routine)
26 June 1982	Upper Mattole, US	daily rain	29.0 mm (1.1 in)	13.8 mm (0.5 in)	55 years	38 of 100 (Notable)
11 April 1982	Upper Mattole, US	daily rain	94.0 mm (3.7 in)	27.7 mm (1.1 in)	72 years	45 of 100 (Notable)
31 March 1982	Upper Mattole, US	daily rain	52.6 mm (2.1 in)	8.1 mm (0.32 in)	84 years	37 of 100 (Notable)

Extremes by Year

1893 to 1986

Yearly extremes at Upper Mattole: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	27.8 C (82.0 F)	1898	26.7 C (80.1 F)	4
Coldest night (TNn)	-3.3 C (26.1 F)	1969	4.5 C (40.0 F)	4
Wettest day (Rx1day)	237.5 mm (9.4 in)	1939	125.1 mm (4.9 in)	94
Wettest five days (Rx5day)	527.3 mm (20.8 in)	1915	300.1 mm (11.8 in)	94
Longest dry spell (CDD)	137 days	1951	67 days	94

Hottest day (TXx)

The hottest day of the year at Upper Mattole, 1893 to 1986. The record is 27.8 C (82.0 F) in 1898, marked on the chart; the median year is 26.7 C (80.1 F).

Hottest day (TXx) at Upper Mattole by year
Year	Hottest day (TXx)
1893	22.2 C (72.0 F)
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	27.8 C (82.0 F)
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
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	25.6 C (78.1 F)
1969	27.8 C (82.0 F)
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

Coldest night (TNn)

The coldest night of the year at Upper Mattole, 1893 to 1986. The record is -3.3 C (26.1 F) in 1969, marked on the chart; the median year is 4.5 C (40.0 F).

Coldest night (TNn) at Upper Mattole by year
Year	Coldest night (TNn)
1893	7.8 C (46.0 F)
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	1.1 C (34.0 F)
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
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	8.9 C (48.0 F)
1969	-3.3 C (26.1 F)
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

Wettest day (Rx1day)

The wettest day of the year at Upper Mattole, 1893 to 1986. The record is 237.5 mm (9.4 in) in 1939, marked on the chart; the median year is 125.1 mm (4.9 in).

Wettest day (Rx1day) at Upper Mattole by year
Year	Wettest day (Rx1day)
1893	108.0 mm (4.3 in)
1894	228.6 mm (9.0 in)
1895	188.2 mm (7.4 in)
1896	130.3 mm (5.1 in)
1897	140.5 mm (5.5 in)
1898	118.1 mm (4.6 in)
1899	139.7 mm (5.5 in)
1900	110.0 mm (4.3 in)
1901	57.7 mm (2.3 in)
1902	210.3 mm (8.3 in)
1903	147.8 mm (5.8 in)
1904	168.4 mm (6.6 in)
1905	157.7 mm (6.2 in)
1906	170.9 mm (6.7 in)
1907	220.0 mm (8.7 in)
1908	79.8 mm (3.1 in)
1909	118.1 mm (4.6 in)
1910	103.1 mm (4.1 in)
1911	112.3 mm (4.4 in)
1912	122.9 mm (4.8 in)
1913	162.6 mm (6.4 in)
1914	121.7 mm (4.8 in)
1915	221.0 mm (8.7 in)
1916	66.5 mm (2.6 in)
1917	80.3 mm (3.2 in)
1918	53.3 mm (2.1 in)
1919	127.0 mm (5.0 in)
1920	179.3 mm (7.1 in)
1921	122.7 mm (4.8 in)
1922	111.8 mm (4.4 in)
1923	50.8 mm (2.0 in)
1924	105.4 mm (4.1 in)
1925	90.2 mm (3.6 in)
1926	159.0 mm (6.3 in)
1927	180.3 mm (7.1 in)
1928	116.8 mm (4.6 in)
1929	105.4 mm (4.1 in)
1930	92.7 mm (3.6 in)
1931	116.8 mm (4.6 in)
1932	236.2 mm (9.3 in)
1933	144.8 mm (5.7 in)
1934	172.7 mm (6.8 in)
1935	76.2 mm (3.0 in)
1936	123.2 mm (4.9 in)
1937	152.4 mm (6.0 in)
1938	153.7 mm (6.1 in)
1939	237.5 mm (9.4 in)
1940	132.1 mm (5.2 in)
1941	146.3 mm (5.8 in)
1942	130.0 mm (5.1 in)
1943	101.1 mm (4.0 in)
1944	83.8 mm (3.3 in)
1945	149.9 mm (5.9 in)
1946	86.4 mm (3.4 in)
1947	129.5 mm (5.1 in)
1948	144.8 mm (5.7 in)
1949	141.2 mm (5.6 in)
1950	201.7 mm (7.9 in)
1951	122.7 mm (4.8 in)
1952	119.4 mm (4.7 in)
1953	102.9 mm (4.1 in)
1954	166.6 mm (6.6 in)
1955	128.0 mm (5.0 in)
1956	97.8 mm (3.9 in)
1957	110.5 mm (4.4 in)
1958	121.9 mm (4.8 in)
1959	191.5 mm (7.5 in)
1960	100.8 mm (4.0 in)
1961	138.4 mm (5.4 in)
1962	119.4 mm (4.7 in)
1963	175.3 mm (6.9 in)
1964	143.8 mm (5.7 in)
1965	120.7 mm (4.8 in)
1966	190.2 mm (7.5 in)
1967	99.1 mm (3.9 in)
1968	109.7 mm (4.3 in)
1969	164.6 mm (6.5 in)
1970	169.9 mm (6.7 in)
1971	191.8 mm (7.6 in)
1972	108.0 mm (4.3 in)
1973	127.8 mm (5.0 in)
1974	157.5 mm (6.2 in)
1975	162.6 mm (6.4 in)
1976	60.5 mm (2.4 in)
1977	92.7 mm (3.6 in)
1978	93.2 mm (3.7 in)
1979	123.2 mm (4.9 in)
1980	112.0 mm (4.4 in)
1981	132.6 mm (5.2 in)
1982	150.6 mm (5.9 in)
1983	115.1 mm (4.5 in)
1984	184.7 mm (7.3 in)
1985	86.4 mm (3.4 in)
1986	104.4 mm (4.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Upper Mattole, 1893 to 1986. The record is 527.3 mm (20.8 in) in 1915, marked on the chart; the median year is 300.1 mm (11.8 in).

Wettest five days (Rx5day) at Upper Mattole by year
Year	Wettest five days (Rx5day)
1893	266.2 mm (10.5 in)
1894	356.2 mm (14.0 in)
1895	196.4 mm (7.7 in)
1896	353.3 mm (13.9 in)
1897	290.1 mm (11.4 in)
1898	277.4 mm (10.9 in)
1899	378.3 mm (14.9 in)
1900	350.3 mm (13.8 in)
1901	146.7 mm (5.8 in)
1902	395.3 mm (15.6 in)
1903	361.4 mm (14.2 in)
1904	315.8 mm (12.4 in)
1905	260.5 mm (10.3 in)
1906	330.1 mm (13.0 in)
1907	325.4 mm (12.8 in)
1908	183.3 mm (7.2 in)
1909	312.9 mm (12.3 in)
1910	213.5 mm (8.4 in)
1911	179.6 mm (7.1 in)
1912	284.0 mm (11.2 in)
1913	240.8 mm (9.5 in)
1914	372.2 mm (14.7 in)
1915	527.3 mm (20.8 in)
1916	203.2 mm (8.0 in)
1917	182.8 mm (7.2 in)
1918	116.1 mm (4.6 in)
1919	351.2 mm (13.8 in)
1920	450.3 mm (17.7 in)
1921	223.8 mm (8.8 in)
1922	218.3 mm (8.6 in)
1923	149.2 mm (5.9 in)
1924	213.3 mm (8.4 in)
1925	239.1 mm (9.4 in)
1926	468.7 mm (18.5 in)
1927	296.0 mm (11.7 in)
1928	207.0 mm (8.1 in)
1929	312.4 mm (12.3 in)
1930	205.7 mm (8.1 in)
1931	330.3 mm (13.0 in)
1932	392.4 mm (15.4 in)
1933	281.9 mm (11.1 in)
1934	251.5 mm (9.9 in)
1935	167.6 mm (6.6 in)
1936	300.6 mm (11.8 in)
1937	337.6 mm (13.3 in)
1938	327.4 mm (12.9 in)
1939	456.6 mm (18.0 in)
1940	384.3 mm (15.1 in)
1941	410.7 mm (16.2 in)
1942	359.3 mm (14.1 in)
1943	193.6 mm (7.6 in)
1944	269.5 mm (10.6 in)
1945	332.3 mm (13.1 in)
1946	297.2 mm (11.7 in)
1947	149.8 mm (5.9 in)
1948	331.5 mm (13.1 in)
1949	457.7 mm (18.0 in)
1950	512.6 mm (20.2 in)
1951	335.8 mm (13.2 in)
1952	319.0 mm (12.6 in)
1953	283.8 mm (11.2 in)
1954	311.6 mm (12.3 in)
1955	496.8 mm (19.6 in)
1956	285.5 mm (11.2 in)
1957	247.4 mm (9.7 in)
1958	318.2 mm (12.5 in)
1959	458.7 mm (18.1 in)
1960	248.1 mm (9.8 in)
1961	344.9 mm (13.6 in)
1962	289.0 mm (11.4 in)
1963	358.2 mm (14.1 in)
1964	392.0 mm (15.4 in)
1965	254.0 mm (10.0 in)
1966	383.2 mm (15.1 in)
1967	271.7 mm (10.7 in)
1968	270.3 mm (10.6 in)
1969	299.0 mm (11.8 in)
1970	293.7 mm (11.6 in)
1971	323.9 mm (12.8 in)
1972	205.2 mm (8.1 in)
1973	352.4 mm (13.9 in)
1974	385.6 mm (15.2 in)
1975	299.5 mm (11.8 in)
1976	189.5 mm (7.5 in)
1977	203.5 mm (8.0 in)
1978	265.9 mm (10.5 in)
1979	186.9 mm (7.4 in)
1980	290.8 mm (11.4 in)
1981	343.5 mm (13.5 in)
1982	359.6 mm (14.2 in)
1983	308.8 mm (12.2 in)
1984	412.2 mm (16.2 in)
1985	148.1 mm (5.8 in)
1986	378.3 mm (14.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Upper Mattole, 1893 to 1986. The record is 137 days in 1951, marked on the chart; the median year is 67 days.

Longest dry spell (CDD) at Upper Mattole by year
Year	Longest dry spell (CDD)
1893	31 days
1894	24 days
1895	23 days
1896	28 days
1897	38 days
1898	22 days
1899	37 days
1900	19 days
1901	61 days
1902	58 days
1903	26 days
1904	41 days
1905	100 days
1906	78 days
1907	57 days
1908	111 days
1909	83 days
1910	106 days
1911	30 days
1912	31 days
1913	33 days
1914	67 days
1915	36 days
1916	57 days
1917	42 days
1918	6 days
1919	24 days
1920	35 days
1921	31 days
1922	25 days
1923	89 days
1924	36 days
1925	80 days
1926	102 days
1927	66 days
1928	50 days
1929	114 days
1930	102 days
1931	128 days
1932	16 days
1933	117 days
1934	104 days
1935	62 days
1936	113 days
1937	77 days
1938	117 days
1939	75 days
1940	93 days
1941	69 days
1942	105 days
1943	131 days
1944	73 days
1945	124 days
1946	50 days
1947	52 days
1948	57 days
1949	59 days
1950	88 days
1951	137 days
1952	71 days
1953	76 days
1954	72 days
1955	85 days
1956	57 days
1957	53 days
1958	44 days
1959	118 days
1960	83 days
1961	24 days
1962	89 days
1963	91 days
1964	87 days
1965	58 days
1966	84 days
1967	106 days
1968	69 days
1969	90 days
1970	102 days
1971	29 days
1972	67 days
1973	44 days
1974	82 days
1975	54 days
1976	41 days
1977	74 days
1978	74 days
1979	61 days
1980	84 days
1981	83 days
1982	82 days
1983	48 days
1984	115 days
1985	53 days
1986	11 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

57 years, 1896 to 1984

A day with at least 133.2 mm (5.2 in) of rain is expected about once in 2 years. A day with at least 228.7 mm (9.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Upper Mattole: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	133.2 mm (5.2 in)
5 years	164.5 mm (6.5 in)
10 years	182.7 mm (7.2 in)
25 years	203.1 mm (8.0 in)
50 years	216.6 mm (8.5 in)
100 years	228.7 mm (9.0 in)	Longer than the 57 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, 57 years of values from 1896 to 1984.

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: 237.5 mm (9.4 in) in 1939; 201.7 mm (7.9 in) in 1950; 191.8 mm (7.6 in) in 1971.

Download the Data

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