Daily records
Page built 2026-10-16
Data as of 2025-12-31
Search
Built 2026-10-16 (16 October 2026)

Alameda NAS Weather Records (USW00023239)

Record envelope, standing records and threshold days for Alameda NAS (USW00023239), California, United States, with 52 years of record.

Key Facts for Alameda NAS

  • Alameda NAS (USW00023239) is a weather station in California, United States at 37.73 latitude and -122.32 longitude, 5 m (16 ft) above sea level.
  • The station reports from 1945 to 1996, 52 years of record.
  • 1,464 records set at Alameda NAS still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Alameda NAS set a daily record high minimum temperature of 13.9 C (57.0 F) on 31 December 1996.

About the Station

  • Location: California, United States, 37.73 latitude, -122.32 longitude.
  • Elevation: 5 m (16 ft).
  • Period of record: 1945 to 1996, 52 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Alameda NAS, with 2026 drawn through them The band shows the record high and record low for each calendar day at Alameda NAS. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Alameda NAS. 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 Alameda NAS, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan22.2 C (72.0 F)-1.1 C (30.0 F)n/an/a
Feb26.1 C (79.0 F)0.0 C (32.0 F)n/an/a
Mar30.0 C (86.0 F)2.2 C (36.0 F)n/an/a
Apr33.3 C (91.9 F)3.3 C (37.9 F)n/an/a
May37.8 C (100.0 F)5.6 C (42.1 F)n/an/a
Jun38.3 C (100.9 F)8.3 C (46.9 F)n/an/a
Jul36.1 C (97.0 F)8.9 C (48.0 F)n/an/a
Aug38.9 C (102.0 F)9.4 C (48.9 F)n/an/a
Sep38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Oct38.3 C (100.9 F)6.7 C (44.1 F)n/an/a
Nov29.4 C (84.9 F)3.3 C (37.9 F)n/an/a
Dec23.9 C (75.0 F)-2.8 C (27.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Alameda NAS by the year they were set 1,464 records at Alameda NAS still stand. 1967 holds the most, with 78. 0204060801945: 231946: 341947: 301948: 251949: 601950: 481951: 281952: 341953: 211954: 251955: 411956: 181957: 161958: 301959: 381960: 191961: 241962: 181963: 161964: 401965: 401966: 431967: 781968: 361969: 191970: 451971: 351972: 471973: 171974: 181975: 251976: 261977: 171978: 251979: 161980: 161981: 191982: 141983: 341984: 201985: 261986: 131987: 191988: 231989: 291990: 181991: 171992: 201993: 371994: 91995: 331996: 42194519511957196319691975198119871993
1,464 records at Alameda NAS still stand. 1967 holds the most, with 78.
Standing records at Alameda NAS by the year they were set
Year setStanding records
194523
194634
194730
194825
194960
195048
195128
195234
195321
195425
195541
195618
195716
195830
195938
196019
196124
196218
196316
196440
196540
196643
196778
196836
196919
197045
197135
197247
197317
197418
197525
197626
197717
197825
197916
198016
198119
198214
198334
198420
198526
198613
198719
198823
198929
199018
199117
199220
199337
19949
199533
199642

All-Time Record Progression

1 new records
When Alameda NAS set new all-time records 1 all-time records were set at Alameda NAS between 4 January 1982 and 4 January 1982. Each dot is a new record. Record daily precipitation4 January 1982: Record daily precipitation 133.9 mm (5.3 in)
1 all-time records were set at Alameda NAS between 4 January 1982 and 4 January 1982. Each dot is a new record.
When Alameda NAS set new all-time records
DateKindDetail
1982-01-04Record daily precipitationRecord daily precipitation 133.9 mm (5.3 in)

Wettest Day of Each Month

Jan: 133.9 mm (5.3 in)
Record daily precipitation for each month at Alameda NAS The wettest day on record for each calendar month at Alameda NAS. The most was 133.9 mm (5.3 in) on 4 January 1982. 050100150 Jan: 133.9 mm (5.3 in), 4 January 1982 Jan Feb: 55.1 mm (2.2 in), 12 February 1987 Feb Mar: 42.4 mm (1.7 in), 31 March 1982 Mar Apr: 46.7 mm (1.8 in), 6 April 1967 Apr May: 45.5 mm (1.8 in), 15 May 1996 May Jun: 24.6 mm (1.0 in), 2 June 1967 Jun Jul: 19.1 mm (0.8 in), 8 July 1974 Jul Aug: 8.1 mm (0.32 in), 18 August 1976 Aug Sep: 64.3 mm (2.5 in), 18 September 1959 Sep Oct: 89.9 mm (3.5 in), 13 October 1962 Oct Nov: 101.6 mm (4.0 in), 5 November 1994 Nov Dec: 93.7 mm (3.7 in), 6 December 1952 Dec
The wettest day on record for each calendar month at Alameda NAS. The most was 133.9 mm (5.3 in) on 4 January 1982.
Record daily precipitation for each month at Alameda NAS
MonthRecord daily precipitation (mm)Date
Jan133.9 mm (5.3 in)4 January 1982
Feb55.1 mm (2.2 in)12 February 1987
Mar42.4 mm (1.7 in)31 March 1982
Apr46.7 mm (1.8 in)6 April 1967
May45.5 mm (1.8 in)15 May 1996
Jun24.6 mm (1.0 in)2 June 1967
Jul19.1 mm (0.8 in)8 July 1974
Aug8.1 mm (0.32 in)18 August 1976
Sep64.3 mm (2.5 in)18 September 1959
Oct89.9 mm (3.5 in)13 October 1962
Nov101.6 mm (4.0 in)5 November 1994
Dec93.7 mm (3.7 in)6 December 1952

Period of Record Coverage

1945 to 1996
Days with data per year at Alameda NAS 52 years of record at Alameda NAS, 1945 to 1996. 1 years have data for under 90 percent of days and are left out of rankings: 1945. 1945: 306 of 365 days1946: 365 of 365 days1947: 364 of 365 days1948: 364 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 364 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days19501960197019801990
52 years of record at Alameda NAS, 1945 to 1996. 1 years have data for under 90 percent of days and are left out of rankings: 1945.
Days with data per year at Alameda NAS
YearDays with dataShare of yearComplete
194530684%No
1946365100%Yes
1947364100%Yes
194836499%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970364100%Yes
1971364100%Yes
1972365100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988365100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes

Latest Records

20
Latest records at Alameda NAS
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 1996Alameda NAS, USdaily high min13.9 C (57.0 F)0.6 C (1.1 F)1 year7 of 100 (Routine)
21 December 1996Alameda NAS, USdaily rain (Tie)39.4 mm (1.6 in)tie51 years5 of 100 (Routine)
17 December 1996Alameda NAS, USdaily high max19.4 C (66.9 F)0.5 C (0.9 F)46 years19 of 100 (Routine)
10 December 1996Alameda NAS, USdaily rain32.0 mm (1.3 in)17.5 mm (0.7 in)6 years21 of 100 (Routine)
9 December 1996Alameda NAS, USdaily high min (Tie)12.8 C (55.0 F)tie46 years4 of 100 (Routine)
8 December 1996Alameda NAS, USdaily high min (Tie)13.9 C (57.0 F)tie46 years4 of 100 (Routine)
19 November 1996Alameda NAS, USdaily high min (Tie)13.9 C (57.0 F)tie46 years4 of 100 (Routine)
18 November 1996Alameda NAS, USdaily high min15.0 C (59.0 F)0.6 C (1.1 F)46 years20 of 100 (Routine)
17 November 1996Alameda NAS, USdaily rain23.9 mm (0.9 in)3.8 mm (0.15 in)9 years10 of 100 (Routine)
16 November 1996Alameda NAS, USdaily rain20.6 mm (0.8 in)1.5 mm (0.06 in)17 years11 of 100 (Routine)
6 November 1996Alameda NAS, USdaily low min7.8 C (46.0 F)0.5 C (0.9 F)7 years9 of 100 (Routine)
30 October 1996Alameda NAS, USmonthly low max13.9 C (57.0 F)0.5 C (0.9 F)44 years29 of 100 (Routine)
8 October 1996Alameda NAS, USmonthly high min18.9 C (66.0 F)0.6 C (1.1 F)36 years29 of 100 (Routine)
8 October 1996Alameda NAS, USdaily high max36.7 C (98.1 F)6.1 C (11.0 F)2 years21 of 100 (Routine)
7 October 1996Alameda NAS, USdaily high max35.6 C (96.1 F)4.5 C (8.1 F)45 years30 of 100 (Routine)
7 October 1996Alameda NAS, USdaily high min17.2 C (63.0 F)1.1 C (2.0 F)24 years18 of 100 (Routine)
6 October 1996Alameda NAS, USdaily high max31.7 C (89.1 F)1.1 C (2.0 F)20 years13 of 100 (Routine)
15 September 1996Alameda NAS, USdaily rain1.0 mm (0.04 in)1.0 mm (0.04 in)51 years20 of 100 (Routine)
30 August 1996Alameda NAS, USdaily high max (Tie)27.8 C (82.0 F)tie28 years3 of 100 (Routine)
12 August 1996Alameda NAS, USdaily high min17.2 C (63.0 F)0.5 C (0.9 F)4 years9 of 100 (Routine)

Climate Trend

51 complete years, 1946 to 1996
Annual mean temperature at Alameda NAS as warming stripes, 1946 to 1996 One stripe for each of 51 complete years at Alameda NAS, 1946 to 1996. Blue stripes are years cooler than the station's own mean of 14.9 C (58.9 F); red stripes are warmer. The coolest year was 1971, at 13.7 C (56.6 F), and the warmest was 1995, at 16.5 C (61.6 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1946: 14.4 C, -0.5 C from the station mean1947: 15.3 C, +0.3 C from the station mean1948: 14.5 C, -0.4 C from the station mean1949: 14.3 C, -0.7 C from the station mean1950: 14.8 C, -0.2 C from the station mean1951: 14.3 C, -0.7 C from the station mean1952: 14.4 C, -0.6 C from the station mean1953: 15.2 C, +0.2 C from the station mean1954: 14.7 C, -0.2 C from the station mean1955: 14.2 C, -0.7 C from the station mean1956: 14.7 C, -0.2 C from the station mean1957: 15.2 C, +0.3 C from the station mean1958: 16.0 C, +1.0 C from the station mean1959: 16.0 C, +1.0 C from the station mean1960: 14.9 C, 0.0 C from the station mean1961: 15.1 C, +0.2 C from the station mean1962: 14.7 C, -0.3 C from the station mean1963: 14.7 C, -0.2 C from the station mean1964: 14.4 C, -0.6 C from the station mean1965: 14.2 C, -0.7 C from the station mean1966: 14.4 C, -0.5 C from the station mean1967: 14.2 C, -0.7 C from the station mean1968: 15.1 C, +0.1 C from the station mean1969: 14.7 C, -0.2 C from the station mean1970: 15.0 C, +0.1 C from the station mean1971: 13.7 C, -1.3 C from the station mean1972: 13.7 C, -1.2 C from the station mean1973: 14.7 C, -0.2 C from the station mean1974: 14.6 C, -0.3 C from the station mean1975: 14.0 C, -0.9 C from the station mean1976: 14.9 C, 0.0 C from the station mean1977: 14.4 C, -0.5 C from the station mean1978: 14.9 C, -0.1 C from the station mean1979: 15.1 C, +0.2 C from the station mean1980: 15.1 C, +0.1 C from the station mean1981: 15.5 C, +0.6 C from the station mean1982: 14.9 C, -0.1 C from the station mean1983: 16.1 C, +1.2 C from the station mean1984: 15.7 C, +0.7 C from the station mean1985: 14.8 C, -0.1 C from the station mean1986: 15.3 C, +0.4 C from the station mean1987: 15.4 C, +0.4 C from the station mean1988: 15.5 C, +0.5 C from the station mean1989: 15.3 C, +0.3 C from the station mean1990: 15.2 C, +0.3 C from the station mean1991: 14.8 C, -0.2 C from the station mean1992: 15.6 C, +0.6 C from the station mean1993: 16.0 C, +1.0 C from the station mean1994: 15.2 C, +0.3 C from the station mean1995: 16.5 C, +1.5 C from the station mean1996: 16.0 C, +1.1 C from the station mean19461950195519601965197019751980198519901995
One stripe for each of 51 complete years at Alameda NAS, 1946 to 1996. Blue stripes are years cooler than the station's own mean of 14.9 C (58.9 F); red stripes are warmer. The coolest year was 1971, at 13.7 C (56.6 F), and the warmest was 1995, at 16.5 C (61.6 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Alameda NAS as warming stripes, 1946 to 1996
YearAnnual mean temperatureDifference from the station mean
194614.4 C-0.54 C
194715.3 C+0.34 C
194814.5 C-0.42 C
194914.3 C-0.70 C
195014.8 C-0.17 C
195114.3 C-0.67 C
195214.4 C-0.56 C
195315.2 C+0.22 C
195414.7 C-0.24 C
195514.2 C-0.75 C
195614.7 C-0.24 C
195715.2 C+0.28 C
195816.0 C+1.00 C
195916.0 C+1.03 C
196014.9 C-0.03 C
196115.1 C+0.15 C
196214.7 C-0.27 C
196314.7 C-0.21 C
196414.4 C-0.60 C
196514.2 C-0.75 C
196614.4 C-0.52 C
196714.2 C-0.73 C
196815.1 C+0.13 C
196914.7 C-0.22 C
197015.0 C+0.07 C
197113.7 C-1.26 C
197213.7 C-1.25 C
197314.7 C-0.24 C
197414.6 C-0.32 C
197514.0 C-0.93 C
197614.9 C-0.02 C
197714.4 C-0.52 C
197814.9 C-0.06 C
197915.1 C+0.17 C
198015.1 C+0.11 C
198115.5 C+0.55 C
198214.9 C-0.06 C
198316.1 C+1.18 C
198415.7 C+0.72 C
198514.8 C-0.11 C
198615.3 C+0.35 C
198715.4 C+0.43 C
198815.5 C+0.51 C
198915.3 C+0.34 C
199015.2 C+0.29 C
199114.8 C-0.20 C
199215.6 C+0.63 C
199316.0 C+1.00 C
199415.2 C+0.28 C
199516.5 C+1.52 C
199616.0 C+1.09 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1946 to 1996. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Alameda NAS
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.3) per decade0.3 F (0.2 to 0.5) per decade1946 to 199651Rise
Mean daily maximum0.12 C (0.01 to 0.23) per decade0.22 F (0.01 to 0.42) per decade1946 to 199651Rise
Mean daily minimum0.3 C (0.2 to 0.4) per decade0.5 F (0.3 to 0.7) per decade1946 to 199651Rise

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

1945 to 1996
Yearly extremes at Alameda NAS: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.9 C (102.0 F)196833.9 C (93.0 F)52
Coldest night (TNn)-2.8 C (27.0 F)19722.8 C (37.0 F)52
Wettest day (Rx1day)133.9 mm (5.3 in)198239.9 mm (1.6 in)52
Wettest five days (Rx5day)207.4 mm (8.2 in)196280.0 mm (3.1 in)52
Longest dry spell (CDD)176 days1965117 days52

Hottest day (TXx)

Hottest day (TXx) at Alameda NAS by year The hottest day of the year at Alameda NAS, 1945 to 1996. The record is 38.9 C (102.0 F) in 1968, marked on the chart; the median year is 33.9 C (93.0 F). 3032.53537.54019501960197019801990Record: 38.9 C (102.0 F) in 1968
The hottest day of the year at Alameda NAS, 1945 to 1996. The record is 38.9 C (102.0 F) in 1968, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Alameda NAS by year
YearHottest day (TXx)
194530.6 C (87.1 F)
194633.9 C (93.0 F)
194733.3 C (91.9 F)
194831.7 C (89.1 F)
194937.8 C (100.0 F)
195032.8 C (91.0 F)
195133.3 C (91.9 F)
195232.2 C (90.0 F)
195333.3 C (91.9 F)
195434.4 C (93.9 F)
195532.8 C (91.0 F)
195631.7 C (89.1 F)
195734.4 C (93.9 F)
195832.8 C (91.0 F)
195935.0 C (95.0 F)
196034.4 C (93.9 F)
196137.8 C (100.0 F)
196232.2 C (90.0 F)
196333.3 C (91.9 F)
196435.0 C (95.0 F)
196531.7 C (89.1 F)
196635.6 C (96.1 F)
196733.3 C (91.9 F)
196838.9 C (102.0 F)
196930.6 C (87.1 F)
197034.4 C (93.9 F)
197138.9 C (102.0 F)
197236.1 C (97.0 F)
197336.1 C (97.0 F)
197432.2 C (90.0 F)
197535.6 C (96.1 F)
197638.3 C (100.9 F)
197731.7 C (89.1 F)
197833.3 C (91.9 F)
197937.8 C (100.0 F)
198036.7 C (98.1 F)
198132.8 C (91.0 F)
198233.9 C (93.0 F)
198335.6 C (96.1 F)
198436.7 C (98.1 F)
198538.3 C (100.9 F)
198632.2 C (90.0 F)
198736.1 C (97.0 F)
198832.8 C (91.0 F)
198934.4 C (93.9 F)
199031.7 C (89.1 F)
199130.6 C (87.1 F)
199231.1 C (88.0 F)
199336.1 C (97.0 F)
199433.3 C (91.9 F)
199536.1 C (97.0 F)
199636.7 C (98.1 F)

Coldest night (TNn)

Coldest night (TNn) at Alameda NAS by year The coldest night of the year at Alameda NAS, 1945 to 1996. The record is -2.8 C (27.0 F) in 1972, marked on the chart; the median year is 2.8 C (37.0 F). -5-2.502.557.519501960197019801990Record: -2.8 C (27.0 F) in 1972
The coldest night of the year at Alameda NAS, 1945 to 1996. The record is -2.8 C (27.0 F) in 1972, marked on the chart; the median year is 2.8 C (37.0 F).
Coldest night (TNn) at Alameda NAS by year
YearColdest night (TNn)
19453.3 C (37.9 F)
19463.3 C (37.9 F)
19471.7 C (35.1 F)
19480.0 C (32.0 F)
1949-1.1 C (30.0 F)
19500.0 C (32.0 F)
19512.8 C (37.0 F)
19521.1 C (34.0 F)
19533.3 C (37.9 F)
19543.3 C (37.9 F)
19553.3 C (37.9 F)
19563.3 C (37.9 F)
19571.7 C (35.1 F)
19584.4 C (39.9 F)
19594.4 C (39.9 F)
19602.2 C (36.0 F)
19611.1 C (34.0 F)
19620.6 C (33.1 F)
19632.2 C (36.0 F)
19643.3 C (37.9 F)
19651.1 C (34.0 F)
19661.7 C (35.1 F)
19671.7 C (35.1 F)
1968-0.6 C (30.9 F)
19692.8 C (37.0 F)
19704.4 C (39.9 F)
19711.1 C (34.0 F)
1972-2.8 C (27.0 F)
19734.4 C (39.9 F)
19743.3 C (37.9 F)
19753.3 C (37.9 F)
19763.3 C (37.9 F)
19772.8 C (37.0 F)
19782.2 C (36.0 F)
19793.3 C (37.9 F)
19803.9 C (39.0 F)
19814.4 C (39.9 F)
19823.3 C (37.9 F)
19834.4 C (39.9 F)
19843.3 C (37.9 F)
19851.7 C (35.1 F)
19865.6 C (42.1 F)
19872.8 C (37.0 F)
19883.3 C (37.9 F)
19890.0 C (32.0 F)
1990-2.8 C (27.0 F)
19912.2 C (36.0 F)
19921.7 C (35.1 F)
19931.7 C (35.1 F)
19945.0 C (41.0 F)
19955.0 C (41.0 F)
19960.6 C (33.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Alameda NAS by year The wettest day of the year at Alameda NAS, 1945 to 1996. The record is 133.9 mm (5.3 in) in 1982, marked on the chart; the median year is 39.9 mm (1.6 in). 05010015019501960197019801990Record: 133.9 mm (5.3 in) in 1982
The wettest day of the year at Alameda NAS, 1945 to 1996. The record is 133.9 mm (5.3 in) in 1982, marked on the chart; the median year is 39.9 mm (1.6 in).
Wettest day (Rx1day) at Alameda NAS by year
YearWettest day (Rx1day)
194589.7 mm (3.5 in)
194637.3 mm (1.5 in)
194727.7 mm (1.1 in)
194830.5 mm (1.2 in)
194927.4 mm (1.1 in)
195043.4 mm (1.7 in)
195139.4 mm (1.6 in)
195293.7 mm (3.7 in)
195333.8 mm (1.3 in)
195429.0 mm (1.1 in)
195547.2 mm (1.9 in)
195648.8 mm (1.9 in)
195735.3 mm (1.4 in)
195831.8 mm (1.3 in)
195964.3 mm (2.5 in)
196030.0 mm (1.2 in)
196127.9 mm (1.1 in)
196289.9 mm (3.5 in)
196340.9 mm (1.6 in)
196450.0 mm (2.0 in)
196528.4 mm (1.1 in)
196638.4 mm (1.5 in)
196768.1 mm (2.7 in)
196834.0 mm (1.3 in)
196948.3 mm (1.9 in)
197031.2 mm (1.2 in)
197126.9 mm (1.1 in)
197244.5 mm (1.8 in)
197345.5 mm (1.8 in)
197431.2 mm (1.2 in)
197531.8 mm (1.3 in)
197624.1 mm (0.9 in)
197742.4 mm (1.7 in)
197840.9 mm (1.6 in)
197947.0 mm (1.9 in)
198031.5 mm (1.2 in)
198147.0 mm (1.9 in)
1982133.9 mm (5.3 in)
198341.7 mm (1.6 in)
198431.8 mm (1.3 in)
198568.6 mm (2.7 in)
198633.8 mm (1.3 in)
198755.1 mm (2.2 in)
198836.8 mm (1.4 in)
198932.5 mm (1.3 in)
199037.3 mm (1.5 in)
199131.5 mm (1.2 in)
199240.4 mm (1.6 in)
199343.4 mm (1.7 in)
1994101.6 mm (4.0 in)
199583.1 mm (3.3 in)
199646.0 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Alameda NAS by year The wettest five days of the year at Alameda NAS, 1945 to 1996. The record is 207.4 mm (8.2 in) in 1962, marked on the chart; the median year is 80.0 mm (3.1 in). 05010015020025019501960197019801990Record: 207.4 mm (8.2 in) in 1962
The wettest five days of the year at Alameda NAS, 1945 to 1996. The record is 207.4 mm (8.2 in) in 1962, marked on the chart; the median year is 80.0 mm (3.1 in).
Wettest five days (Rx5day) at Alameda NAS by year
YearWettest five days (Rx5day)
1945123.5 mm (4.9 in)
194647.3 mm (1.9 in)
194743.7 mm (1.7 in)
194847.0 mm (1.9 in)
194937.3 mm (1.5 in)
195087.6 mm (3.4 in)
195178.2 mm (3.1 in)
1952158.5 mm (6.2 in)
195359.5 mm (2.3 in)
195469.6 mm (2.7 in)
1955127.7 mm (5.0 in)
195687.1 mm (3.4 in)
195761.6 mm (2.4 in)
195893.1 mm (3.7 in)
195965.6 mm (2.6 in)
196051.5 mm (2.0 in)
196179.2 mm (3.1 in)
1962207.4 mm (8.2 in)
196377.2 mm (3.0 in)
196485.6 mm (3.4 in)
196558.7 mm (2.3 in)
196663.8 mm (2.5 in)
1967143.6 mm (5.7 in)
196851.5 mm (2.0 in)
196987.4 mm (3.4 in)
197096.8 mm (3.8 in)
197142.6 mm (1.7 in)
197276.5 mm (3.0 in)
1973107.4 mm (4.2 in)
197452.6 mm (2.1 in)
197559.6 mm (2.3 in)
197640.6 mm (1.6 in)
197756.7 mm (2.2 in)
1978101.6 mm (4.0 in)
197988.1 mm (3.5 in)
198086.1 mm (3.4 in)
1981100.2 mm (3.9 in)
1982166.2 mm (6.5 in)
198380.8 mm (3.2 in)
198448.1 mm (1.9 in)
198591.5 mm (3.6 in)
1986115.3 mm (4.5 in)
198786.9 mm (3.4 in)
198874.0 mm (2.9 in)
198935.3 mm (1.4 in)
199064.0 mm (2.5 in)
199166.2 mm (2.6 in)
1992109.2 mm (4.3 in)
199387.9 mm (3.5 in)
1994145.8 mm (5.7 in)
1995133.6 mm (5.3 in)
199689.5 mm (3.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Alameda NAS by year The longest dry spell of the year at Alameda NAS, 1945 to 1996. The record is 176 days in 1965, marked on the chart; the median year is 117 days. 05010015020019501960197019801990Record: 176 days in 1965
The longest dry spell of the year at Alameda NAS, 1945 to 1996. The record is 176 days in 1965, marked on the chart; the median year is 117 days.
Longest dry spell (CDD) at Alameda NAS by year
YearLongest dry spell (CDD)
1945116 days
194692 days
194765 days
1948133 days
194972 days
1950173 days
1951109 days
1952101 days
195383 days
1954162 days
1955171 days
1956132 days
1957109 days
1958105 days
1959144 days
1960133 days
1961112 days
1962103 days
1963124 days
1964140 days
1965176 days
196653 days
1967118 days
196888 days
1969135 days
1970130 days
1971147 days
1972107 days
1973138 days
1974110 days
197581 days
1976125 days
1977121 days
1978135 days
197988 days
1980100 days
1981136 days
198285 days
1983146 days
198484 days
198549 days
1986142 days
1987174 days
1988127 days
1989103 days
1990114 days
199145 days
199293 days
1993131 days
1994128 days
1995136 days
1996116 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

51 years, 1946 to 1996

A day with at least 38.4 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 144.2 mm (5.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Alameda NAS: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years38.4 mm (1.5 in)
5 years53.2 mm (2.1 in)
10 years66.9 mm (2.6 in)
25 years90.5 mm (3.6 in)
50 years114.1 mm (4.5 in)
100 years144.2 mm (5.7 in)Longer than the 51 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, 51 years of values from 1946 to 1996.

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: 133.9 mm (5.3 in) in 1982; 101.6 mm (4.0 in) in 1994; 93.7 mm (3.7 in) in 1952.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Alameda NAS standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Alameda NAS 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).