Mad River Rs Weather Records (USC00045244)

Record envelope, standing records and threshold days for Mad River Rs (USC00045244), California, United States, with 46 years of record.

Key Facts for Mad River Rs

Mad River Rs (USC00045244) is a weather station in California, United States at 40.45 latitude and -123.53 longitude, 815 m (2,675 ft) above sea level.
The station reports from 1943 to 1988, 46 years of record.
1,358 records set at Mad River Rs still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mad River Rs set a daily record precipitation of 11.2 mm (0.4 in) on 28 May 1988.

About the Station

Location: California, United States, 40.45 latitude, -123.53 longitude.
Elevation: 815 m (2,675 ft).
Period of record: 1943 to 1988, 46 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 Mad River Rs. 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 Mad River Rs, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	24.4 C (75.9 F)	-5.6 C (21.9 F)	n/a	n/a
Feb	23.3 C (73.9 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-5.6 C (21.9 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a
May	34.4 C (93.9 F)	-3.9 C (25.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	3.9 C (39.0 F)	n/a	n/a
Aug	39.4 C (102.9 F)	2.8 C (37.0 F)	n/a	n/a
Sep	41.7 C (107.1 F)	0.0 C (32.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-1.7 C (28.9 F)	n/a	n/a
Nov	28.3 C (82.9 F)	-3.9 C (25.0 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-6.7 C (19.9 F)	n/a	n/a

Which Years Hold Standing Records

1,358 standing records

1,358 records at Mad River Rs still stand. 1983 holds the most, with 355.

Wettest Day of Each Month

Dec: 199.9 mm (7.9 in)

The wettest day on record for each calendar month at Mad River Rs. The most was 199.9 mm (7.9 in) on 22 December 1964.

Record daily precipitation for each month at Mad River Rs
Month	Record daily precipitation (mm)	Date
Jan	134.4 mm (5.3 in)	16 January 1974
Feb	127.0 mm (5.0 in)	21 February 1956
Mar	144.5 mm (5.7 in)	8 March 1986
Apr	66.0 mm (2.6 in)	1 April 1974
May	56.6 mm (2.2 in)	18 May 1957
Jun	23.4 mm (0.9 in)	7 June 1947
Jul	21.6 mm (0.9 in)	12 July 1966
Aug	74.4 mm (2.9 in)	30 August 1983
Sep	77.5 mm (3.1 in)	27 September 1972
Oct	138.4 mm (5.4 in)	28 October 1950
Nov	110.7 mm (4.4 in)	20 November 1955
Dec	199.9 mm (7.9 in)	22 December 1964

Period of Record Coverage

1965 to 1988

8 years of record at Mad River Rs, 1965 to 1988. 8 years have data for under 90 percent of days and are left out of rankings: 1965, 1971, 1980, 1983, 1984, 1985, 1986, 1988.

Latest Records

Latest records at Mad River Rs
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 May 1988	Mad River Rs, US	daily rain	11.2 mm (0.4 in)	1.3 mm (0.05 in)	40 years	17 of 100 (Routine)
25 September 1986	Mad River Rs, US	daily rain	20.1 mm (0.8 in)	18.3 mm (0.7 in)	4 years	19 of 100 (Routine)
24 September 1986	Mad River Rs, US	daily rain	15.0 mm (0.6 in)	9.2 mm (0.36 in)	37 years	20 of 100 (Routine)
17 September 1986	Mad River Rs, US	daily rain	40.6 mm (1.6 in)	16.7 mm (0.7 in)	37 years	28 of 100 (Routine)
15 September 1986	Mad River Rs, US	daily rain	9.9 mm (0.39 in)	4.6 mm (0.18 in)	27 years	15 of 100 (Routine)
6 May 1986	Mad River Rs, US	daily rain	24.4 mm (1.0 in)	1.0 mm (0.04 in)	7 years	7 of 100 (Routine)
8 March 1986	Mad River Rs, US	monthly rain	144.5 mm (5.7 in)	35.3 mm (1.4 in)	10 years	38 of 100 (Notable)
19 February 1986	Mad River Rs, US	daily rain	79.0 mm (3.1 in)	22.4 mm (0.9 in)	12 years	17 of 100 (Routine)
18 February 1986	Mad River Rs, US	daily rain	100.1 mm (3.9 in)	36.6 mm (1.4 in)	28 years	29 of 100 (Routine)
17 February 1986	Mad River Rs, US	daily rain	109.2 mm (4.3 in)	58.7 mm (2.3 in)	16 years	36 of 100 (Notable)
3 February 1986	Mad River Rs, US	daily rain	104.1 mm (4.1 in)	55.6 mm (2.2 in)	28 years	39 of 100 (Notable)
30 January 1986	Mad River Rs, US	daily rain	60.2 mm (2.4 in)	13.7 mm (0.5 in)	18 years	15 of 100 (Routine)
17 January 1986	Mad River Rs, US	daily rain	79.5 mm (3.1 in)	22.6 mm (0.9 in)	16 years	18 of 100 (Routine)
18 August 1985	Mad River Rs, US	daily rain	10.7 mm (0.4 in)	1.0 mm (0.04 in)	8 years	6 of 100 (Routine)
27 November 1984	Mad River Rs, US	daily rain	63.5 mm (2.5 in)	25.9 mm (1.0 in)	14 years	21 of 100 (Routine)
12 November 1984	Mad River Rs, US	daily rain	69.9 mm (2.8 in)	21.6 mm (0.9 in)	33 years	24 of 100 (Routine)
3 November 1984	Mad River Rs, US	daily rain	64.0 mm (2.5 in)	11.7 mm (0.5 in)	40 years	22 of 100 (Routine)
2 November 1984	Mad River Rs, US	daily rain	76.2 mm (3.0 in)	37.6 mm (1.5 in)	40 years	35 of 100 (Notable)
6 June 1984	Mad River Rs, US	daily rain	17.5 mm (0.7 in)	5.3 mm (0.21 in)	36 years	20 of 100 (Routine)
4 June 1984	Mad River Rs, US	daily rain	11.7 mm (0.5 in)	5.3 mm (0.21 in)	37 years	20 of 100 (Routine)

Extremes by Year

1943 to 1988

Yearly extremes at Mad River Rs: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1988	37.2 C (99.0 F)	8
Coldest night (TNn)	-6.7 C (19.9 F)	1983	-5.6 C (21.9 F)	8
Wettest day (Rx1day)	199.9 mm (7.9 in)	1964	88.9 mm (3.5 in)	45
Wettest five days (Rx5day)	475.5 mm (18.7 in)	1964	198.9 mm (7.8 in)	45
Longest dry spell (CDD)	131 days	1960	65 days	45

Hottest day (TXx)

The hottest day of the year at Mad River Rs, 1943 to 1988. The record is 41.7 C (107.1 F) in 1988, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Mad River Rs by year
Year	Hottest day (TXx)
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	31.1 C (88.0 F)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	22.2 C (72.0 F)
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	31.7 C (89.1 F)
1981	n/a
1982	n/a
1983	36.1 C (97.0 F)
1984	40.0 C (104.0 F)
1985	39.4 C (102.9 F)
1986	38.3 C (100.9 F)
1988	41.7 C (107.1 F)

Coldest night (TNn)

The coldest night of the year at Mad River Rs, 1943 to 1988. The record is -6.7 C (19.9 F) in 1983, marked on the chart; the median year is -5.6 C (21.9 F).

Coldest night (TNn) at Mad River Rs by year
Year	Coldest night (TNn)
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	0.6 C (33.1 F)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	-5.6 C (21.9 F)
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	1.1 C (34.0 F)
1981	n/a
1982	n/a
1983	-6.7 C (19.9 F)
1984	-5.6 C (21.9 F)
1985	-6.7 C (19.9 F)
1986	-5.6 C (21.9 F)
1988	-3.9 C (25.0 F)

Wettest day (Rx1day)

The wettest day of the year at Mad River Rs, 1943 to 1988. The record is 199.9 mm (7.9 in) in 1964, marked on the chart; the median year is 88.9 mm (3.5 in).

Wettest day (Rx1day) at Mad River Rs by year
Year	Wettest day (Rx1day)
1943	29.2 mm (1.1 in)
1944	60.5 mm (2.4 in)
1945	116.3 mm (4.6 in)
1946	70.9 mm (2.8 in)
1947	115.3 mm (4.5 in)
1948	72.4 mm (2.9 in)
1949	64.0 mm (2.5 in)
1950	138.4 mm (5.4 in)
1951	77.7 mm (3.1 in)
1952	88.9 mm (3.5 in)
1953	104.1 mm (4.1 in)
1954	80.0 mm (3.1 in)
1955	110.7 mm (4.4 in)
1956	127.0 mm (5.0 in)
1957	73.7 mm (2.9 in)
1958	70.9 mm (2.8 in)
1959	83.8 mm (3.3 in)
1960	96.5 mm (3.8 in)
1961	76.2 mm (3.0 in)
1962	109.2 mm (4.3 in)
1963	117.6 mm (4.6 in)
1964	199.9 mm (7.9 in)
1965	66.5 mm (2.6 in)
1966	122.4 mm (4.8 in)
1967	53.3 mm (2.1 in)
1968	95.3 mm (3.8 in)
1969	96.5 mm (3.8 in)
1970	94.7 mm (3.7 in)
1971	86.4 mm (3.4 in)
1972	82.0 mm (3.2 in)
1973	91.4 mm (3.6 in)
1974	134.4 mm (5.3 in)
1975	109.2 mm (4.3 in)
1976	80.3 mm (3.2 in)
1977	71.1 mm (2.8 in)
1978	78.7 mm (3.1 in)
1979	91.4 mm (3.6 in)
1980	27.2 mm (1.1 in)
1981	127.0 mm (5.0 in)
1982	105.7 mm (4.2 in)
1983	101.3 mm (4.0 in)
1984	76.2 mm (3.0 in)
1985	85.1 mm (3.4 in)
1986	144.5 mm (5.7 in)
1988	16.5 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mad River Rs, 1943 to 1988. The record is 475.5 mm (18.7 in) in 1964, marked on the chart; the median year is 198.9 mm (7.8 in).

Wettest five days (Rx5day) at Mad River Rs by year
Year	Wettest five days (Rx5day)
1943	64.8 mm (2.6 in)
1944	146.7 mm (5.8 in)
1945	182.0 mm (7.2 in)
1946	185.2 mm (7.3 in)
1947	143.5 mm (5.6 in)
1948	201.2 mm (7.9 in)
1949	159.2 mm (6.3 in)
1950	299.6 mm (11.8 in)
1951	179.3 mm (7.1 in)
1952	138.9 mm (5.5 in)
1953	226.0 mm (8.9 in)
1954	121.2 mm (4.8 in)
1955	379.8 mm (15.0 in)
1956	325.9 mm (12.8 in)
1957	198.9 mm (7.8 in)
1958	223.3 mm (8.8 in)
1959	283.0 mm (11.1 in)
1960	290.8 mm (11.4 in)
1961	141.5 mm (5.6 in)
1962	317.9 mm (12.5 in)
1963	225.0 mm (8.9 in)
1964	475.5 mm (18.7 in)
1965	181.0 mm (7.1 in)
1966	298.7 mm (11.8 in)
1967	161.0 mm (6.3 in)
1968	225.2 mm (8.9 in)
1969	203.9 mm (8.0 in)
1970	275.3 mm (10.8 in)
1971	185.4 mm (7.3 in)
1972	152.1 mm (6.0 in)
1973	222.2 mm (8.7 in)
1974	355.3 mm (14.0 in)
1975	215.1 mm (8.5 in)
1976	206.0 mm (8.1 in)
1977	195.0 mm (7.7 in)
1978	231.1 mm (9.1 in)
1979	169.8 mm (6.7 in)
1980	67.6 mm (2.7 in)
1981	321.8 mm (12.7 in)
1982	161.8 mm (6.4 in)
1983	181.7 mm (7.2 in)
1984	131.4 mm (5.2 in)
1985	14.7 mm (0.6 in)
1986	315.0 mm (12.4 in)
1988	25.9 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mad River Rs, 1943 to 1988. The record is 131 days in 1960, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Mad River Rs by year
Year	Longest dry spell (CDD)
1943	14 days
1944	35 days
1945	113 days
1946	60 days
1947	39 days
1948	47 days
1949	65 days
1950	83 days
1951	101 days
1952	34 days
1953	64 days
1954	70 days
1955	94 days
1956	57 days
1957	73 days
1958	58 days
1959	77 days
1960	131 days
1961	61 days
1962	75 days
1963	56 days
1964	86 days
1965	56 days
1966	48 days
1967	106 days
1968	61 days
1969	86 days
1970	125 days
1971	56 days
1972	65 days
1973	68 days
1974	61 days
1975	43 days
1976	46 days
1977	16 days
1978	63 days
1979	39 days
1980	103 days
1981	103 days
1982	71 days
1983	30 days
1984	97 days
1985	70 days
1986	88 days
1988	92 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

32 years, 1944 to 1982

A day with at least 92.5 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 191.6 mm (7.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Mad River Rs: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	92.5 mm (3.6 in)
5 years	118.8 mm (4.7 in)
10 years	136.3 mm (5.4 in)
25 years	158.5 mm (6.2 in)
50 years	175.1 mm (6.9 in)	Longer than the 32 years of record
100 years	191.6 mm (7.5 in)	Longer than the 32 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, 32 years of values from 1944 to 1982.

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: 199.9 mm (7.9 in) in 1964; 138.4 mm (5.4 in) in 1950; 134.4 mm (5.3 in) in 1974.

Download the Data

Data for Mad River Rs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mad River Rs 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).

Days with data per year at Mad River Rs
Year	Days with data	Share of year	Complete
1965	29	8%	No
1971	17	5%	No
1980	29	8%	No
1983	201	55%	No
1984	214	58%	No
1985	146	40%	No
1986	207	57%	No
1988	116	32%	No