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Data as of 2025-12-31
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Built 2026-10-16 (16 October 2026)

Lathrop San Joaquin Bd Weather Records (USC00044823)

Record envelope, standing records and threshold days for Lathrop San Joaquin Bd (USC00044823), California, United States, with 45 years of record.

Key Facts for Lathrop San Joaquin Bd

  • Lathrop San Joaquin Bd (USC00044823) is a weather station in California, United States at 37.78 latitude and -121.30 longitude, 8 m (27 ft) above sea level.
  • The station reports from 1906 to 1950, 45 years of record.
  • 0 records set at Lathrop San Joaquin Bd still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Lathrop San Joaquin Bd set a daily record precipitation of 20.3 mm (0.8 in) on 8 December 1950.

About the Station

  • Location: California, United States, 37.78 latitude, -121.30 longitude.
  • Elevation: 8 m (27 ft).
  • Period of record: 1906 to 1950, 45 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Lathrop San Joaquin Bd, with 2026 drawn through them The band shows the record high and record low for each calendar day at Lathrop San Joaquin Bd. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Lathrop San Joaquin Bd. 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 Lathrop San Joaquin Bd, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Lathrop San Joaquin Bd by the year they were set 0 records at Lathrop San Joaquin Bd still stand. 00000000000
0 records at Lathrop San Joaquin Bd still stand.
Standing records at Lathrop San Joaquin Bd by the year they were set
Year setStanding records

Wettest Day of Each Month

Sep: 89.9 mm (3.5 in)
Record daily precipitation for each month at Lathrop San Joaquin Bd The wettest day on record for each calendar month at Lathrop San Joaquin Bd. The most was 89.9 mm (3.5 in) on 13 September 1918. 0255075100 Jan: 58.4 mm (2.3 in), 21 January 1909 Jan Feb: 38.9 mm (1.5 in), 3 February 1944 Feb Mar: 46.2 mm (1.8 in), 31 March 1940 Mar Apr: 25.4 mm (1.0 in), 28 April 1943 Apr May: 27.7 mm (1.1 in), 13 May 1924 May Jun: 12.2 mm (0.5 in), 9 June 1929 Jun Jul: 6.4 mm (0.25 in), 24 July 1937 Jul Aug: 2.3 mm (0.09 in), 25 August 1930 Aug Sep: 89.9 mm (3.5 in), 13 September 1918 Sep Oct: 34.3 mm (1.4 in), 31 October 1927 Oct Nov: 34.3 mm (1.4 in), 9 November 1924 Nov Dec: 49.3 mm (1.9 in), 11 December 1906 Dec
The wettest day on record for each calendar month at Lathrop San Joaquin Bd. The most was 89.9 mm (3.5 in) on 13 September 1918.
Record daily precipitation for each month at Lathrop San Joaquin Bd
MonthRecord daily precipitation (mm)Date
Jan58.4 mm (2.3 in)21 January 1909
Feb38.9 mm (1.5 in)3 February 1944
Mar46.2 mm (1.8 in)31 March 1940
Apr25.4 mm (1.0 in)28 April 1943
May27.7 mm (1.1 in)13 May 1924
Jun12.2 mm (0.5 in)9 June 1929
Jul6.4 mm (0.25 in)24 July 1937
Aug2.3 mm (0.09 in)25 August 1930
Sep89.9 mm (3.5 in)13 September 1918
Oct34.3 mm (1.4 in)31 October 1927
Nov34.3 mm (1.4 in)9 November 1924
Dec49.3 mm (1.9 in)11 December 1906

Latest Records

20
Latest records at Lathrop San Joaquin Bd
DateStationRecordValueBeat old record byOld record stoodSignificance
8 December 1950Lathrop San Joaquin Bd, USdaily rain20.3 mm (0.8 in)6.6 mm (0.26 in)32 years20 of 100 (Routine)
7 December 1950Lathrop San Joaquin Bd, USdaily rain21.8 mm (0.9 in)0.7 mm (0.03 in)40 years17 of 100 (Routine)
3 December 1950Lathrop San Joaquin Bd, USdaily rain20.3 mm (0.8 in)5.8 mm (0.23 in)21 years18 of 100 (Routine)
19 November 1950Lathrop San Joaquin Bd, USdaily rain29.0 mm (1.1 in)0.8 mm (0.03 in)16 years9 of 100 (Routine)
18 November 1950Lathrop San Joaquin Bd, USdaily rain19.6 mm (0.8 in)15.0 mm (0.6 in)32 years20 of 100 (Routine)
26 October 1950Lathrop San Joaquin Bd, USdaily rain14.0 mm (0.6 in)2.6 mm (0.10 in)43 years20 of 100 (Routine)
24 October 1950Lathrop San Joaquin Bd, USdaily rain5.1 mm (0.20 in)4.3 mm (0.17 in)9 years14 of 100 (Routine)
17 September 1950Lathrop San Joaquin Bd, USdaily rain12.7 mm (0.5 in)12.7 mm (0.5 in)43 years20 of 100 (Routine)
28 January 1950Lathrop San Joaquin Bd, USdaily rain21.8 mm (0.9 in)2.7 mm (0.11 in)34 years17 of 100 (Routine)
17 January 1950Lathrop San Joaquin Bd, USdaily rain16.5 mm (0.6 in)3.0 mm (0.12 in)34 years18 of 100 (Routine)
19 December 1949Lathrop San Joaquin Bd, USdaily rain7.4 mm (0.29 in)0.8 mm (0.03 in)8 years7 of 100 (Routine)
15 December 1949Lathrop San Joaquin Bd, USdaily rain6.9 mm (0.27 in)0.3 mm (0.01 in)16 years8 of 100 (Routine)
28 August 1949Lathrop San Joaquin Bd, USdaily rain0.5 mm (0.02 in)0.5 mm (0.02 in)42 years16 of 100 (Routine)
16 May 1949Lathrop San Joaquin Bd, USdaily rain (Tie)0.5 mm (0.02 in)tie4 years1 of 100 (Routine)
14 May 1949Lathrop San Joaquin Bd, USdaily rain2.5 mm (0.10 in)0.5 mm (0.02 in)8 years6 of 100 (Routine)
11 October 1948Lathrop San Joaquin Bd, USdaily rain14.5 mm (0.6 in)8.4 mm (0.33 in)13 years20 of 100 (Routine)
7 June 1948Lathrop San Joaquin Bd, USdaily rain10.9 mm (0.4 in)1.8 mm (0.07 in)37 years20 of 100 (Routine)
6 June 1948Lathrop San Joaquin Bd, USdaily rain8.9 mm (0.35 in)7.1 mm (0.28 in)12 years20 of 100 (Routine)
1 June 1948Lathrop San Joaquin Bd, USdaily rain10.9 mm (0.4 in)7.9 mm (0.31 in)4 years20 of 100 (Routine)
19 May 1948Lathrop San Joaquin Bd, USdaily rain4.8 mm (0.19 in)4.8 mm (0.19 in)41 years20 of 100 (Routine)

Extremes by Year

1906 to 1950
Yearly extremes at Lathrop San Joaquin Bd: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)89.9 mm (3.5 in)191826.4 mm (1.0 in)45
Wettest five days (Rx5day)98.1 mm (3.9 in)191848.6 mm (1.9 in)45
Longest dry spell (CDD)212 days1928128 days45

Wettest day (Rx1day)

Wettest day (Rx1day) at Lathrop San Joaquin Bd by year The wettest day of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 89.9 mm (3.5 in) in 1918, marked on the chart; the median year is 26.4 mm (1.0 in). 02040608010019101920193019401950Record: 89.9 mm (3.5 in) in 1918
The wettest day of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 89.9 mm (3.5 in) in 1918, marked on the chart; the median year is 26.4 mm (1.0 in).
Wettest day (Rx1day) at Lathrop San Joaquin Bd by year
YearWettest day (Rx1day)
190649.3 mm (1.9 in)
190730.5 mm (1.2 in)
190841.4 mm (1.6 in)
190958.4 mm (2.3 in)
191034.0 mm (1.3 in)
191139.6 mm (1.6 in)
191219.1 mm (0.8 in)
191322.9 mm (0.9 in)
191439.4 mm (1.6 in)
191536.1 mm (1.4 in)
191622.4 mm (0.9 in)
191723.6 mm (0.9 in)
191889.9 mm (3.5 in)
191914.2 mm (0.6 in)
192021.3 mm (0.8 in)
192136.1 mm (1.4 in)
192224.6 mm (1.0 in)
192314.2 mm (0.6 in)
192434.3 mm (1.4 in)
192526.4 mm (1.0 in)
192625.1 mm (1.0 in)
192734.3 mm (1.4 in)
192822.9 mm (0.9 in)
192920.8 mm (0.8 in)
193021.6 mm (0.9 in)
193127.9 mm (1.1 in)
193225.9 mm (1.0 in)
193324.9 mm (1.0 in)
193432.3 mm (1.3 in)
193523.4 mm (0.9 in)
193624.1 mm (0.9 in)
193742.7 mm (1.7 in)
193819.1 mm (0.8 in)
193919.3 mm (0.8 in)
194046.2 mm (1.8 in)
194127.9 mm (1.1 in)
194232.3 mm (1.3 in)
194325.4 mm (1.0 in)
194438.9 mm (1.5 in)
194532.8 mm (1.3 in)
194632.8 mm (1.3 in)
194710.9 mm (0.4 in)
194814.5 mm (0.6 in)
194917.3 mm (0.7 in)
195029.0 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Lathrop San Joaquin Bd by year The wettest five days of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 98.1 mm (3.9 in) in 1918, marked on the chart; the median year is 48.6 mm (1.9 in). 2040608010019101920193019401950Record: 98.1 mm (3.9 in) in 1918
The wettest five days of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 98.1 mm (3.9 in) in 1918, marked on the chart; the median year is 48.6 mm (1.9 in).
Wettest five days (Rx5day) at Lathrop San Joaquin Bd by year
YearWettest five days (Rx5day)
190693.0 mm (3.7 in)
190755.4 mm (2.2 in)
190826.6 mm (1.0 in)
190975.2 mm (3.0 in)
191050.3 mm (2.0 in)
191178.2 mm (3.1 in)
191230.7 mm (1.2 in)
191352.1 mm (2.1 in)
191461.2 mm (2.4 in)
191543.7 mm (1.7 in)
191650.6 mm (2.0 in)
191744.1 mm (1.7 in)
191898.1 mm (3.9 in)
191931.4 mm (1.2 in)
192031.8 mm (1.3 in)
192157.0 mm (2.2 in)
192267.8 mm (2.7 in)
192329.1 mm (1.1 in)
192440.9 mm (1.6 in)
192542.4 mm (1.7 in)
192653.3 mm (2.1 in)
192736.8 mm (1.4 in)
192850.9 mm (2.0 in)
192926.9 mm (1.1 in)
193042.3 mm (1.7 in)
193165.5 mm (2.6 in)
193259.4 mm (2.3 in)
193343.7 mm (1.7 in)
193443.7 mm (1.7 in)
193542.4 mm (1.7 in)
193656.9 mm (2.2 in)
193780.2 mm (3.2 in)
193838.6 mm (1.5 in)
193943.1 mm (1.7 in)
194086.1 mm (3.4 in)
194147.2 mm (1.9 in)
194283.1 mm (3.3 in)
194348.6 mm (1.9 in)
194457.7 mm (2.3 in)
194570.9 mm (2.8 in)
194642.7 mm (1.7 in)
194722.1 mm (0.9 in)
194837.8 mm (1.5 in)
194934.0 mm (1.3 in)
195064.4 mm (2.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Lathrop San Joaquin Bd by year The longest dry spell of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 212 days in 1928, marked on the chart; the median year is 128 days. 05010015020025019101920193019401950Record: 212 days in 1928
The longest dry spell of the year at Lathrop San Joaquin Bd, 1906 to 1950. The record is 212 days in 1928, marked on the chart; the median year is 128 days.
Longest dry spell (CDD) at Lathrop San Joaquin Bd by year
YearLongest dry spell (CDD)
190623 days
1907133 days
190846 days
1909105 days
1910170 days
1911101 days
191274 days
1913101 days
1914114 days
191574 days
1916120 days
1917163 days
1918154 days
1919183 days
1920107 days
1921102 days
1922116 days
1923112 days
1924144 days
1925143 days
1926147 days
1927140 days
1928212 days
1929177 days
1930112 days
1931128 days
1932182 days
1933161 days
1934108 days
1935153 days
1936102 days
193770 days
1938148 days
1939113 days
1940147 days
194166 days
1942137 days
1943175 days
1944141 days
1945130 days
194668 days
1947122 days
1948125 days
1949143 days
1950135 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

41 years, 1907 to 1950

A day with at least 26.3 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 77.1 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Lathrop San Joaquin Bd: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years26.3 mm (1.0 in)
5 years36.5 mm (1.4 in)
10 years44.5 mm (1.8 in)
25 years56.1 mm (2.2 in)
50 years66.0 mm (2.6 in)Longer than the 41 years of record
100 years77.1 mm (3.0 in)Longer than the 41 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, 41 years of values from 1907 to 1950.

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: 89.9 mm (3.5 in) in 1918; 58.4 mm (2.3 in) in 1909; 46.2 mm (1.8 in) in 1940.

Download the Data

  • Data for Lathrop San Joaquin Bd standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Lathrop San Joaquin Bd 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 . Last revised (2025-12-31).