Exchequer Dam Weather Records (USC00042920)

Record envelope, standing records and threshold days for Exchequer Dam (USC00042920), California, United States, with 77 years of record.

Key Facts for Exchequer Dam

Exchequer Dam (USC00042920) is a weather station in California, United States at 37.35 latitude and -120.16 longitude, 128 m (420 ft) above sea level.
The station reports from 1950 to 2026, 77 years of record.
1,464 records set at Exchequer Dam still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Exchequer Dam set a daily record precipitation of 30.7 mm (1.2 in) on 22 April 2026.

About the Station

Location: California, United States, 37.35 latitude, -120.16 longitude.
Elevation: 128 m (420 ft).
Period of record: 1950 to 2026, 77 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

75 days at or beyond a record

The band shows the record high and record low for each calendar day at Exchequer Dam. The lines show the 2026 daily maximum and minimum. 75 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Exchequer Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	26.1 C (79.0 F)	1.1 C (34.0 F)	18.9 C (66.0 F)	4.4 C (39.9 F)
Feb	25.0 C (77.0 F)	1.1 C (34.0 F)	23.3 C (73.9 F)	2.2 C (36.0 F)
Mar	31.7 C (89.1 F)	2.8 C (37.0 F)	31.7 C (89.1 F)	7.8 C (46.0 F)
Apr	33.3 C (91.9 F)	3.9 C (39.0 F)	28.9 C (84.0 F)	8.3 C (46.9 F)
May	39.4 C (102.9 F)	6.7 C (44.1 F)	35.6 C (96.1 F)	8.9 C (48.0 F)
Jun	41.7 C (107.1 F)	12.2 C (54.0 F)	38.3 C (100.9 F)	14.4 C (57.9 F)
Jul	43.3 C (109.9 F)	12.8 C (55.0 F)	40.0 C (104.0 F)	12.8 C (55.0 F)
Aug	43.3 C (109.9 F)	13.9 C (57.0 F)	40.6 C (105.1 F)	18.3 C (64.9 F)
Sep	39.4 C (102.9 F)	11.1 C (52.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	6.7 C (44.1 F)	n/a	n/a
Nov	27.8 C (82.0 F)	3.3 C (37.9 F)	n/a	n/a
Dec	20.6 C (69.1 F)	3.3 C (37.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Exchequer Dam still stand. 2023 holds the most, with 206.

Wettest Day of Each Month

Dec: 89.4 mm (3.5 in)

The wettest day on record for each calendar month at Exchequer Dam. The most was 89.4 mm (3.5 in) on 23 December 1955.

Record daily precipitation for each month at Exchequer Dam
Month	Record daily precipitation (mm)	Date
Jan	64.5 mm (2.5 in)	27 January 1983
Feb	64.8 mm (2.6 in)	8 February 1994
Mar	86.4 mm (3.4 in)	25 March 1998
Apr	69.9 mm (2.8 in)	28 April 1954
May	53.8 mm (2.1 in)	22 May 2006
Jun	37.1 mm (1.5 in)	16 June 1995
Jul	16.0 mm (0.6 in)	10 July 1974
Aug	16.8 mm (0.7 in)	15 August 1976
Sep	41.1 mm (1.6 in)	19 September 1959
Oct	68.6 mm (2.7 in)	24 October 1989
Nov	48.5 mm (1.9 in)	14 November 2025
Dec	89.4 mm (3.5 in)	23 December 1955

Period of Record Coverage

1970 to 2026

13 years of record at Exchequer Dam, 1970 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1970, 1981, 2011, 2012, 2016, 2019, 2022, 2023 and others.

Days with data per year at Exchequer Dam
Year	Days with data	Share of year	Complete
1970	31	8%	No
1981	31	8%	No
2011	61	17%	No
2012	61	17%	No
2016	30	8%	No
2019	275	75%	No
2020	365	100%	Yes
2021	365	100%	Yes
2022	213	58%	No
2023	310	85%	No
2024	366	100%	Yes
2025	365	100%	Yes
2026	243	67%	No

Latest Records

Latest records at Exchequer Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 April 2026	Exchequer Dam, US	daily rain	30.7 mm (1.2 in)	12.9 mm (0.5 in)	64 years	39 of 100 (Notable)
17 February 2026	Exchequer Dam, US	daily rain	51.6 mm (2.0 in)	25.2 mm (1.0 in)	46 years	44 of 100 (Notable)
16 November 2025	Exchequer Dam, US	daily rain	31.2 mm (1.2 in)	5.0 mm (0.20 in)	60 years	29 of 100 (Routine)
14 November 2025	Exchequer Dam, US	monthly rain	48.5 mm (1.9 in)	1.5 mm (0.06 in)	36 years	29 of 100 (Routine)
3 October 2025	Exchequer Dam, US	daily rain	9.4 mm (0.37 in)	1.8 mm (0.07 in)	58 years	20 of 100 (Routine)
27 August 2025	Exchequer Dam, US	daily rain	0.3 mm (0.01 in)	0.3 mm (0.01 in)	74 years	20 of 100 (Routine)
26 August 2025	Exchequer Dam, US	daily rain	1.0 mm (0.04 in)	0.7 mm (0.03 in)	22 years	13 of 100 (Routine)
13 March 2025	Exchequer Dam, US	daily rain	42.7 mm (1.7 in)	14.8 mm (0.6 in)	42 years	33 of 100 (Routine)
14 February 2025	Exchequer Dam, US	daily rain	58.4 mm (2.3 in)	24.9 mm (1.0 in)	46 years	44 of 100 (Notable)
27 December 2024	Exchequer Dam, US	daily rain	18.0 mm (0.7 in)	0.2 mm (0.01 in)	69 years	20 of 100 (Routine)
5 May 2024	Exchequer Dam, US	daily rain	20.6 mm (0.8 in)	7.4 mm (0.29 in)	1 year	16 of 100 (Routine)
30 September 2023	Exchequer Dam, US	daily rain	4.6 mm (0.18 in)	0.3 mm (0.01 in)	40 years	19 of 100 (Routine)
14 August 2023	Exchequer Dam, US	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	72 years	20 of 100 (Routine)
5 May 2023	Exchequer Dam, US	daily rain	13.2 mm (0.5 in)	6.1 mm (0.24 in)	28 years	20 of 100 (Routine)
29 March 2023	Exchequer Dam, US	daily rain	23.4 mm (0.9 in)	7.4 mm (0.29 in)	16 years	19 of 100 (Routine)
25 February 2023	Exchequer Dam, US	daily rain	34.3 mm (1.4 in)	6.4 mm (0.25 in)	64 years	32 of 100 (Routine)
10 January 2023	Exchequer Dam, US	daily rain	48.8 mm (1.9 in)	5.9 mm (0.23 in)	64 years	31 of 100 (Routine)
8 January 2023	Exchequer Dam, US	daily rain (Tie)	21.1 mm (0.8 in)	tie	29 years	3 of 100 (Routine)
11 December 2022	Exchequer Dam, US	daily rain	41.9 mm (1.6 in)	13.7 mm (0.5 in)	25 years	25 of 100 (Routine)
20 September 2022	Exchequer Dam, US	daily rain	11.9 mm (0.5 in)	1.7 mm (0.07 in)	37 years	19 of 100 (Routine)

Extremes by Year

1950 to 2026

Yearly extremes at Exchequer Dam: 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)	2020	40.6 C (105.1 F)	13
Coldest night (TNn)	1.1 C (34.0 F)	1981	2.2 C (36.0 F)	13
Wettest day (Rx1day)	89.4 mm (3.5 in)	1955	43.2 mm (1.7 in)	77
Wettest five days (Rx5day)	235.2 mm (9.3 in)	1955	84.1 mm (3.3 in)	77
Longest dry spell (CDD)	184 days	1965	113 days	77

Hottest day (TXx)

The hottest day of the year at Exchequer Dam, 1950 to 2026. The record is 43.3 C (109.9 F) in 2020, marked on the chart; the median year is 40.6 C (105.1 F).

Hottest day (TXx) at Exchequer Dam by year
Year	Hottest day (TXx)
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	38.9 C (102.0 F)
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	26.1 C (79.0 F)
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	30.6 C (87.1 F)
2012	42.2 C (108.0 F)
2013	n/a
2014	n/a
2015	n/a
2016	30.0 C (86.0 F)
2017	n/a
2018	n/a
2019	40.6 C (105.1 F)
2020	43.3 C (109.9 F)
2021	43.3 C (109.9 F)
2022	41.7 C (107.1 F)
2023	41.7 C (107.1 F)
2024	43.3 C (109.9 F)
2025	39.4 C (102.9 F)
2026	40.6 C (105.1 F)

Coldest night (TNn)

The coldest night of the year at Exchequer Dam, 1950 to 2026. The record is 1.1 C (34.0 F) in 1981, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at Exchequer Dam by year
Year	Coldest night (TNn)
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	6.7 C (44.1 F)
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	1.1 C (34.0 F)
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	4.4 C (39.9 F)
2012	4.4 C (39.9 F)
2013	n/a
2014	n/a
2015	n/a
2016	8.9 C (48.0 F)
2017	n/a
2018	n/a
2019	3.3 C (37.9 F)
2020	1.1 C (34.0 F)
2021	1.1 C (34.0 F)
2022	2.2 C (36.0 F)
2023	1.7 C (35.1 F)
2024	2.2 C (36.0 F)
2025	2.8 C (37.0 F)
2026	2.2 C (36.0 F)

Wettest day (Rx1day)

The wettest day of the year at Exchequer Dam, 1950 to 2026. The record is 89.4 mm (3.5 in) in 1955, marked on the chart; the median year is 43.2 mm (1.7 in).

Wettest day (Rx1day) at Exchequer Dam by year
Year	Wettest day (Rx1day)
1950	63.5 mm (2.5 in)
1951	44.7 mm (1.8 in)
1952	35.3 mm (1.4 in)
1953	42.4 mm (1.7 in)
1954	69.9 mm (2.8 in)
1955	89.4 mm (3.5 in)
1956	25.9 mm (1.0 in)
1957	31.0 mm (1.2 in)
1958	39.9 mm (1.6 in)
1959	42.9 mm (1.7 in)
1960	31.0 mm (1.2 in)
1961	29.0 mm (1.1 in)
1962	63.5 mm (2.5 in)
1963	44.5 mm (1.8 in)
1964	43.2 mm (1.7 in)
1965	42.7 mm (1.7 in)
1966	40.9 mm (1.6 in)
1967	39.6 mm (1.6 in)
1968	45.5 mm (1.8 in)
1969	45.2 mm (1.8 in)
1970	39.4 mm (1.6 in)
1971	39.4 mm (1.6 in)
1972	31.5 mm (1.2 in)
1973	42.4 mm (1.7 in)
1974	31.0 mm (1.2 in)
1975	58.2 mm (2.3 in)
1976	27.7 mm (1.1 in)
1977	26.4 mm (1.0 in)
1978	40.6 mm (1.6 in)
1979	44.2 mm (1.7 in)
1980	44.7 mm (1.8 in)
1981	43.2 mm (1.7 in)
1982	54.4 mm (2.1 in)
1983	64.5 mm (2.5 in)
1984	28.7 mm (1.1 in)
1985	24.9 mm (1.0 in)
1986	38.1 mm (1.5 in)
1987	46.7 mm (1.8 in)
1988	47.0 mm (1.9 in)
1989	68.6 mm (2.7 in)
1990	38.1 mm (1.5 in)
1991	45.0 mm (1.8 in)
1992	38.6 mm (1.5 in)
1993	49.3 mm (1.9 in)
1994	64.8 mm (2.6 in)
1995	45.2 mm (1.8 in)
1996	43.7 mm (1.7 in)
1997	38.6 mm (1.5 in)
1998	86.4 mm (3.4 in)
1999	31.2 mm (1.2 in)
2000	49.8 mm (2.0 in)
2001	39.1 mm (1.5 in)
2002	38.4 mm (1.5 in)
2003	34.5 mm (1.4 in)
2004	48.3 mm (1.9 in)
2005	60.5 mm (2.4 in)
2006	53.8 mm (2.1 in)
2007	45.0 mm (1.8 in)
2008	49.8 mm (2.0 in)
2009	45.2 mm (1.8 in)
2010	45.0 mm (1.8 in)
2011	30.5 mm (1.2 in)
2012	47.2 mm (1.9 in)
2013	18.5 mm (0.7 in)
2014	51.1 mm (2.0 in)
2015	81.3 mm (3.2 in)
2016	41.1 mm (1.6 in)
2017	41.4 mm (1.6 in)
2018	38.6 mm (1.5 in)
2019	62.7 mm (2.5 in)
2020	41.4 mm (1.6 in)
2021	51.6 mm (2.0 in)
2022	41.9 mm (1.6 in)
2023	48.8 mm (1.9 in)
2024	35.8 mm (1.4 in)
2025	58.4 mm (2.3 in)
2026	51.6 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Exchequer Dam, 1950 to 2026. The record is 235.2 mm (9.3 in) in 1955, marked on the chart; the median year is 84.1 mm (3.3 in).

Wettest five days (Rx5day) at Exchequer Dam by year
Year	Wettest five days (Rx5day)
1950	159.8 mm (6.3 in)
1951	69.5 mm (2.7 in)
1952	76.1 mm (3.0 in)
1953	50.5 mm (2.0 in)
1954	94.0 mm (3.7 in)
1955	235.2 mm (9.3 in)
1956	52.1 mm (2.1 in)
1957	70.7 mm (2.8 in)
1958	92.7 mm (3.6 in)
1959	82.0 mm (3.2 in)
1960	62.0 mm (2.4 in)
1961	61.8 mm (2.4 in)
1962	116.9 mm (4.6 in)
1963	84.1 mm (3.3 in)
1964	100.3 mm (3.9 in)
1965	82.9 mm (3.3 in)
1966	91.9 mm (3.6 in)
1967	104.1 mm (4.1 in)
1968	64.5 mm (2.5 in)
1969	96.7 mm (3.8 in)
1970	75.3 mm (3.0 in)
1971	61.5 mm (2.4 in)
1972	73.4 mm (2.9 in)
1973	86.3 mm (3.4 in)
1974	57.4 mm (2.3 in)
1975	117.6 mm (4.6 in)
1976	51.1 mm (2.0 in)
1977	44.5 mm (1.8 in)
1978	87.7 mm (3.5 in)
1979	98.8 mm (3.9 in)
1980	105.9 mm (4.2 in)
1981	84.9 mm (3.3 in)
1982	95.3 mm (3.8 in)
1983	110.5 mm (4.4 in)
1984	38.2 mm (1.5 in)
1985	50.6 mm (2.0 in)
1986	98.5 mm (3.9 in)
1987	69.5 mm (2.7 in)
1988	54.4 mm (2.1 in)
1989	78.8 mm (3.1 in)
1990	50.6 mm (2.0 in)
1991	99.0 mm (3.9 in)
1992	84.1 mm (3.3 in)
1993	101.9 mm (4.0 in)
1994	88.7 mm (3.5 in)
1995	90.0 mm (3.5 in)
1996	80.8 mm (3.2 in)
1997	85.0 mm (3.3 in)
1998	115.4 mm (4.5 in)
1999	65.8 mm (2.6 in)
2000	107.8 mm (4.2 in)
2001	73.7 mm (2.9 in)
2002	78.8 mm (3.1 in)
2003	61.0 mm (2.4 in)
2004	102.7 mm (4.0 in)
2005	109.8 mm (4.3 in)
2006	113.8 mm (4.5 in)
2007	47.3 mm (1.9 in)
2008	91.7 mm (3.6 in)
2009	48.2 mm (1.9 in)
2010	69.9 mm (2.8 in)
2011	83.6 mm (3.3 in)
2012	81.0 mm (3.2 in)
2013	25.4 mm (1.0 in)
2014	60.2 mm (2.4 in)
2015	100.1 mm (3.9 in)
2016	86.3 mm (3.4 in)
2017	115.7 mm (4.6 in)
2018	76.4 mm (3.0 in)
2019	107.8 mm (4.2 in)
2020	81.6 mm (3.2 in)
2021	118.1 mm (4.6 in)
2022	17.3 mm (0.7 in)
2023	98.6 mm (3.9 in)
2024	77.0 mm (3.0 in)
2025	114.8 mm (4.5 in)
2026	101.9 mm (4.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Exchequer Dam, 1950 to 2026. The record is 184 days in 1965, marked on the chart; the median year is 113 days.

Longest dry spell (CDD) at Exchequer Dam by year
Year	Longest dry spell (CDD)
1950	14 days
1951	125 days
1952	76 days
1953	121 days
1954	147 days
1955	93 days
1956	96 days
1957	72 days
1958	111 days
1959	139 days
1960	155 days
1961	41 days
1962	75 days
1963	124 days
1964	82 days
1965	184 days
1966	80 days
1967	104 days
1968	90 days
1969	124 days
1970	115 days
1971	124 days
1972	141 days
1973	101 days
1974	83 days
1975	80 days
1976	120 days
1977	138 days
1978	131 days
1979	88 days
1980	115 days
1981	129 days
1982	77 days
1983	116 days
1984	106 days
1985	76 days
1986	136 days
1987	153 days
1988	168 days
1989	61 days
1990	117 days
1991	70 days
1992	99 days
1993	125 days
1994	132 days
1995	145 days
1996	113 days
1997	113 days
1998	90 days
1999	177 days
2000	83 days
2001	79 days
2002	158 days
2003	85 days
2004	140 days
2005	71 days
2006	131 days
2007	31 days
2008	130 days
2009	20 days
2010	17 days
2011	65 days
2012	36 days
2013	126 days
2014	182 days
2015	146 days
2016	160 days
2017	103 days
2018	131 days
2019	112 days
2020	164 days
2021	174 days
2022	52 days
2023	103 days
2024	180 days
2025	120 days
2026	94 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

68 years, 1951 to 2025

A day with at least 42.5 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 90.4 mm (3.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Exchequer Dam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	42.5 mm (1.7 in)
5 years	54.6 mm (2.1 in)
10 years	62.9 mm (2.5 in)
25 years	73.7 mm (2.9 in)
50 years	82.0 mm (3.2 in)
100 years	90.4 mm (3.6 in)	Longer than the 68 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, 68 years of values from 1951 to 2025.

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: 89.4 mm (3.5 in) in 1955; 86.4 mm (3.4 in) in 1998; 81.3 mm (3.2 in) in 2015.

Download the Data

Data for Exchequer Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Exchequer Dam 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).