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Built 2026-10-15 (15 October 2026)

Barstow Weather Records (USC00040521)

Record envelope, standing records and threshold days for Barstow (USC00040521), California, United States, with 47 years of record.

Key Facts for Barstow

  • Barstow (USC00040521) is a weather station in California, United States at 34.89 latitude and -117.02 longitude, 677 m (2,220 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Barstow still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Barstow set a daily record high minimum temperature of 18.9 C (66.0 F) on 8 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: California, United States, 34.89 latitude, -117.02 longitude.
  • Elevation: 677 m (2,220 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

25 days at or beyond a record
Daily record high and record low at Barstow, with 2026 drawn through them The band shows the record high and record low for each calendar day at Barstow. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Barstow. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Barstow, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.6 C (78.1 F)-11.1 C (12.0 F)21.1 C (70.0 F)-2.2 C (28.0 F)
Feb30.6 C (87.1 F)-7.8 C (18.0 F)27.8 C (82.0 F)-1.7 C (28.9 F)
Mar35.6 C (96.1 F)-5.0 C (23.0 F)35.6 C (96.1 F)2.2 C (36.0 F)
Apr36.7 C (98.1 F)-1.1 C (30.0 F)31.7 C (89.1 F)3.3 C (37.9 F)
May41.7 C (107.1 F)0.0 C (32.0 F)38.3 C (100.9 F)7.8 C (46.0 F)
Jun45.0 C (113.0 F)5.0 C (41.0 F)41.1 C (106.0 F)14.4 C (57.9 F)
Jul48.9 C (120.0 F)8.9 C (48.0 F)43.3 C (109.9 F)16.1 C (61.0 F)
Aug44.4 C (111.9 F)10.6 C (51.1 F)43.9 C (111.0 F)13.3 C (55.9 F)
Sep44.4 C (111.9 F)4.4 C (39.9 F)40.0 C (104.0 F)3.3 C (37.9 F)
Oct40.0 C (104.0 F)0.0 C (32.0 F)36.7 C (98.1 F)15.6 C (60.1 F)
Nov31.7 C (89.1 F)-7.8 C (18.0 F)n/an/a
Dec30.0 C (86.0 F)-13.3 C (8.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Barstow by the year they were set 1,464 records at Barstow still stand. 1995 holds the most, with 76. 0204060801980: 271981: 191982: 411983: 321984: 371985: 641986: 511987: 451988: 461989: 551990: 261991: 481992: 231993: 191994: 421995: 761996: 521997: 221998: 211999: 182000: 202001: 82002: 222003: 312004: 142005: 172006: 322007: 342008: 162009: 202010: 302011: 322012: 262013: 292014: 222015: 312016: 232017: 292018: 242019: 282020: 322021: 362022: 202023: 292024: 372025: 282026: 301980198519901995200020052010201520202025
1,464 records at Barstow still stand. 1995 holds the most, with 76.
Standing records at Barstow by the year they were set
Year setStanding records
198027
198119
198241
198332
198437
198564
198651
198745
198846
198955
199026
199148
199223
199319
199442
199576
199652
199722
199821
199918
200020
20018
200222
200331
200414
200517
200632
200734
200816
200920
201030
201132
201226
201329
201422
201531
201623
201729
201824
201928
202032
202136
202220
202329
202437
202528
202630

All-Time Record Progression

1 new records
When Barstow set new all-time records 1 all-time records were set at Barstow between 15 July 2018 and 15 July 2018. Each dot is a new record. Record high minimum temperature15 July 2018: Record high minimum temperature 31.7 C (89.1 F)
1 all-time records were set at Barstow between 15 July 2018 and 15 July 2018. Each dot is a new record.
When Barstow set new all-time records
DateKindDetail
2018-07-15Record high minimum temperatureRecord high minimum temperature 31.7 C (89.1 F)

Wettest Day of Each Month

Sep: 57.2 mm (2.3 in)
Record daily precipitation for each month at Barstow The wettest day on record for each calendar month at Barstow. The most was 57.2 mm (2.3 in) on 3 September 1997. 0204060 Jan: 27.9 mm (1.1 in), 11 January 2015 Jan Feb: 39.9 mm (1.6 in), 24 February 1998 Feb Mar: 38.6 mm (1.5 in), 1 March 1983 Mar Apr: 25.4 mm (1.0 in), 8 April 2020 Apr May: 11.9 mm (0.5 in), 2 May 2018 May Jun: 15.2 mm (0.6 in), 2 June 1999 Jun Jul: 33.3 mm (1.3 in), 13 July 1999 Jul Aug: 34.5 mm (1.4 in), 21 August 2023 Aug Sep: 57.2 mm (2.3 in), 3 September 1997 Sep Oct: 34.3 mm (1.4 in), 20 October 2004 Oct Nov: 30.5 mm (1.2 in), 30 November 2007 Nov Dec: 46.2 mm (1.8 in), 22 December 2010 Dec
The wettest day on record for each calendar month at Barstow. The most was 57.2 mm (2.3 in) on 3 September 1997.
Record daily precipitation for each month at Barstow
MonthRecord daily precipitation (mm)Date
Jan27.9 mm (1.1 in)11 January 2015
Feb39.9 mm (1.6 in)24 February 1998
Mar38.6 mm (1.5 in)1 March 1983
Apr25.4 mm (1.0 in)8 April 2020
May11.9 mm (0.5 in)2 May 2018
Jun15.2 mm (0.6 in)2 June 1999
Jul33.3 mm (1.3 in)13 July 1999
Aug34.5 mm (1.4 in)21 August 2023
Sep57.2 mm (2.3 in)3 September 1997
Oct34.3 mm (1.4 in)20 October 2004
Nov30.5 mm (1.2 in)30 November 2007
Dec46.2 mm (1.8 in)22 December 2010

Period of Record Coverage

1980 to 2026
Days with data per year at Barstow 47 years of record at Barstow, 1980 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1980, 1985, 1990, 1991, 1992, 1993, 1994, 1998 and others. 1980: 214 of 366 days1981: 364 of 365 days1982: 356 of 365 days1983: 355 of 365 days1984: 360 of 366 days1985: 327 of 365 days1986: 352 of 365 days1987: 359 of 365 days1988: 352 of 366 days1989: 340 of 365 days1990: 319 of 365 days1991: 328 of 365 days1992: 297 of 366 days1993: 309 of 365 days1994: 291 of 365 days1995: 349 of 365 days1996: 344 of 366 days1997: 350 of 365 days1998: 310 of 365 days1999: 345 of 365 days2000: 286 of 366 days2001: 246 of 365 days2002: 358 of 365 days2003: 360 of 365 days2004: 351 of 366 days2005: 355 of 365 days2006: 358 of 365 days2007: 361 of 365 days2008: 352 of 366 days2009: 365 of 365 days2010: 363 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 363 of 365 days2016: 366 of 366 days2017: 364 of 365 days2018: 357 of 365 days2019: 362 of 365 days2020: 366 of 366 days2021: 345 of 365 days2022: 359 of 365 days2023: 360 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 282 of 365 days19801990200020102020
47 years of record at Barstow, 1980 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1980, 1985, 1990, 1991, 1992, 1993, 1994, 1998 and others.
Days with data per year at Barstow
YearDays with dataShare of yearComplete
198021458%No
1981364100%Yes
198235698%Yes
198335597%Yes
198436098%Yes
198532790%No
198635296%Yes
198735998%Yes
198835296%Yes
198934093%Yes
199031987%No
199132890%No
199229781%No
199330985%No
199429180%No
199534996%Yes
199634494%Yes
199735096%Yes
199831085%No
199934595%Yes
200028678%No
200124667%No
200235898%Yes
200336099%Yes
200435196%Yes
200535597%Yes
200635898%Yes
200736199%Yes
200835296%Yes
2009365100%Yes
201036399%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
201536399%Yes
2016366100%Yes
2017364100%Yes
201835798%Yes
201936299%Yes
2020366100%Yes
202134595%Yes
202235998%Yes
202336099%Yes
2024366100%Yes
2025365100%Yes
202628277%No

Latest Records

20
Latest records at Barstow
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026Barstow, USdaily high min (Provisional)18.9 C (66.0 F)1.1 C (2.0 F)40 years18 of 100 (Routine)
7 October 2026Barstow, USdaily high min (Provisional)21.7 C (71.1 F)2.8 C (5.0 F)1 year11 of 100 (Routine)
27 September 2026Barstow, USdaily high min (Provisional)21.7 C (71.1 F)1.1 C (2.0 F)11 years9 of 100 (Routine)
14 September 2026Barstow, USmonthly low min (Provisional)3.3 C (37.9 F)1.1 C (2.0 F)43 years29 of 100 (Routine)
11 September 2026Barstow, USdaily high min (Provisional)26.7 C (80.1 F)2.8 C (5.0 F)32 years20 of 100 (Routine)
10 September 2026Barstow, USmonthly high min (Tie, Provisional)27.8 C (82.0 F)tie4 years3 of 100 (Routine)
7 September 2026Barstow, USdaily low max (Provisional)23.3 C (73.9 F)6.1 C (11.0 F)40 years31 of 100 (Routine)
6 September 2026Barstow, USdaily low max (Provisional)24.4 C (75.9 F)3.9 C (7.0 F)40 years26 of 100 (Routine)
5 September 2026Barstow, USdaily low min (Provisional)9.4 C (48.9 F)1.7 C (3.1 F)40 years20 of 100 (Routine)
27 August 2026Barstow, USdaily high max (Provisional)42.2 C (108.0 F)0.5 C (0.9 F)24 years12 of 100 (Routine)
21 August 2026Barstow, USdaily high min (Provisional)27.2 C (81.0 F)2.2 C (4.0 F)5 years12 of 100 (Routine)
12 August 2026Barstow, USdaily rain3.0 mm (0.12 in)0.2 mm (0.01 in)21 years10 of 100 (Routine)
10 August 2026Barstow, USdaily low min13.3 C (55.9 F)2.3 C (4.1 F)27 years19 of 100 (Routine)
10 August 2026Barstow, USdaily high max (Tie)42.8 C (109.0 F)tie21 years2 of 100 (Routine)
9 August 2026Barstow, USdaily high max (Tie)43.3 C (109.9 F)tie44 years4 of 100 (Routine)
6 August 2026Barstow, USdaily high max (Tie)43.9 C (111.0 F)tie28 years3 of 100 (Routine)
4 August 2026Barstow, USdaily high max43.9 C (111.0 F)0.6 C (1.1 F)4 years7 of 100 (Routine)
3 August 2026Barstow, USdaily high max43.9 C (111.0 F)1.7 C (3.1 F)31 years19 of 100 (Routine)
2 August 2026Barstow, USdaily high max43.9 C (111.0 F)0.6 C (1.1 F)32 years15 of 100 (Routine)
13 June 2026Barstow, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)11 years8 of 100 (Routine)

Climate Trend

35 complete years, 1981 to 2025
Annual mean temperature at Barstow as warming stripes, 1981 to 2025 One stripe for each of 35 complete years at Barstow, 1981 to 2025. Blue stripes are years cooler than the station's own mean of 18.8 C (65.9 F); red stripes are warmer. The coolest year was 1982, at 17.1 C (62.8 F), and the warmest was 1995, at 20.0 C (68.0 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1981: 18.9 C, 0.0 C from the station mean1982: 17.1 C, -1.7 C from the station mean1983: 17.7 C, -1.1 C from the station mean1986: 18.1 C, -0.7 C from the station mean1987: 18.0 C, -0.8 C from the station mean1988: 18.5 C, -0.3 C from the station mean1993: 18.6 C, -0.2 C from the station mean1995: 20.0 C, +1.2 C from the station mean1996: 20.0 C, +1.1 C from the station mean1997: 19.3 C, +0.4 C from the station mean1999: 18.5 C, -0.3 C from the station mean2002: 19.0 C, +0.2 C from the station mean2003: 19.2 C, +0.3 C from the station mean2004: 18.5 C, -0.3 C from the station mean2005: 18.4 C, -0.5 C from the station mean2006: 18.6 C, -0.2 C from the station mean2007: 19.2 C, +0.3 C from the station mean2008: 18.9 C, +0.1 C from the station mean2009: 18.5 C, -0.3 C from the station mean2010: 18.1 C, -0.7 C from the station mean2011: 17.6 C, -1.2 C from the station mean2012: 19.2 C, +0.4 C from the station mean2013: 18.7 C, -0.1 C from the station mean2014: 19.9 C, +1.1 C from the station mean2015: 19.3 C, +0.5 C from the station mean2016: 19.5 C, +0.6 C from the station mean2017: 19.5 C, +0.7 C from the station mean2018: 19.5 C, +0.7 C from the station mean2019: 18.1 C, -0.8 C from the station mean2020: 19.2 C, +0.4 C from the station mean2021: 19.5 C, +0.7 C from the station mean2022: 19.2 C, +0.4 C from the station mean2023: 17.9 C, -0.9 C from the station mean2024: 19.5 C, +0.6 C from the station mean2025: 19.4 C, +0.6 C from the station mean1981198519901995200020052010201520202025
One stripe for each of 35 complete years at Barstow, 1981 to 2025. Blue stripes are years cooler than the station's own mean of 18.8 C (65.9 F); red stripes are warmer. The coolest year was 1982, at 17.1 C (62.8 F), and the warmest was 1995, at 20.0 C (68.0 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Barstow as warming stripes, 1981 to 2025
YearAnnual mean temperatureDifference from the station mean
198118.9 C+0.04 C
198217.1 C-1.70 C
198317.7 C-1.15 C
198618.1 C-0.74 C
198718.0 C-0.83 C
198818.5 C-0.28 C
199318.6 C-0.21 C
199520.0 C+1.16 C
199620.0 C+1.14 C
199719.3 C+0.43 C
199918.5 C-0.32 C
200219.0 C+0.15 C
200319.2 C+0.33 C
200418.5 C-0.31 C
200518.4 C-0.47 C
200618.6 C-0.23 C
200719.2 C+0.33 C
200818.9 C+0.07 C
200918.5 C-0.31 C
201018.1 C-0.72 C
201117.6 C-1.19 C
201219.2 C+0.37 C
201318.7 C-0.11 C
201419.9 C+1.09 C
201519.3 C+0.52 C
201619.5 C+0.63 C
201719.5 C+0.72 C
201819.5 C+0.67 C
201918.1 C-0.76 C
202019.2 C+0.35 C
202119.5 C+0.67 C
202219.2 C+0.38 C
202317.9 C-0.95 C
202419.5 C+0.63 C
202519.4 C+0.56 C

The annual mean temperature here has risen by 0.21 C (0.04 to 0.39) per decade over 1981 to 2025. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Barstow
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.21 C (0.04 to 0.39) per decade0.4 F (0.1 to 0.7) per decade1981 to 202535Rise
Mean daily maximum-0.04 C (-0.27 to 0.19) per decade-0.1 F (-0.5 to 0.3) per decade1981 to 202535Not clearly different from zero
Mean daily minimum0.5 C (0.3 to 0.6) per decade0.8 F (0.5 to 1.1) per decade1981 to 202535Rise

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

1980 to 2026
Yearly extremes at Barstow: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)48.9 C (120.0 F)199643.9 C (111.0 F)47
Coldest night (TNn)-13.3 C (8.1 F)1990-5.6 C (21.9 F)47
Wettest day (Rx1day)57.2 mm (2.3 in)199721.6 mm (0.9 in)47
Wettest five days (Rx5day)137.0 mm (5.4 in)201028.2 mm (1.1 in)47
Longest dry spell (CDD)261 days2020118 days47

Hottest day (TXx)

Hottest day (TXx) at Barstow by year The hottest day of the year at Barstow, 1980 to 2026. The record is 48.9 C (120.0 F) in 1996, marked on the chart; the median year is 43.9 C (111.0 F). 40424446485019801990200020102020Record: 48.9 C (120.0 F) in 1996
The hottest day of the year at Barstow, 1980 to 2026. The record is 48.9 C (120.0 F) in 1996, marked on the chart; the median year is 43.9 C (111.0 F).
Hottest day (TXx) at Barstow by year
YearHottest day (TXx)
198042.2 C (108.0 F)
198143.3 C (109.9 F)
198242.8 C (109.0 F)
198341.7 C (107.1 F)
198443.9 C (111.0 F)
198545.0 C (113.0 F)
198643.3 C (109.9 F)
198742.8 C (109.0 F)
198843.3 C (109.9 F)
198945.0 C (113.0 F)
199043.3 C (109.9 F)
199143.9 C (111.0 F)
199242.2 C (108.0 F)
199343.3 C (109.9 F)
199443.9 C (111.0 F)
199546.1 C (115.0 F)
199648.9 C (120.0 F)
199744.4 C (111.9 F)
199845.0 C (113.0 F)
199942.2 C (108.0 F)
200042.8 C (109.0 F)
200142.8 C (109.0 F)
200244.4 C (111.9 F)
200343.9 C (111.0 F)
200442.8 C (109.0 F)
200545.0 C (113.0 F)
200643.9 C (111.0 F)
200745.6 C (114.1 F)
200843.3 C (109.9 F)
200943.9 C (111.0 F)
201043.3 C (109.9 F)
201142.8 C (109.0 F)
201243.9 C (111.0 F)
201345.0 C (113.0 F)
201443.3 C (109.9 F)
201543.3 C (109.9 F)
201644.4 C (111.9 F)
201745.0 C (113.0 F)
201844.4 C (111.9 F)
201942.8 C (109.0 F)
202044.4 C (111.9 F)
202146.1 C (115.0 F)
202243.3 C (109.9 F)
202346.1 C (115.0 F)
202446.1 C (115.0 F)
202543.3 C (109.9 F)
202643.9 C (111.0 F)

Coldest night (TNn)

Coldest night (TNn) at Barstow by year The coldest night of the year at Barstow, 1980 to 2026. The record is -13.3 C (8.1 F) in 1990, marked on the chart; the median year is -5.6 C (21.9 F). -15-10-5019801990200020102020Record: -13.3 C (8.1 F) in 1990
The coldest night of the year at Barstow, 1980 to 2026. The record is -13.3 C (8.1 F) in 1990, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at Barstow by year
YearColdest night (TNn)
1980-3.9 C (25.0 F)
1981-3.9 C (25.0 F)
1982-5.6 C (21.9 F)
1983-5.6 C (21.9 F)
1984-7.2 C (19.0 F)
1985-8.3 C (17.1 F)
1986-7.8 C (18.0 F)
1987-7.8 C (18.0 F)
1988-6.1 C (21.0 F)
1989-7.2 C (19.0 F)
1990-13.3 C (8.1 F)
1991-5.6 C (21.9 F)
1992-4.4 C (24.1 F)
1993-6.7 C (19.9 F)
1994-7.8 C (18.0 F)
1995-7.8 C (18.0 F)
1996-9.4 C (15.1 F)
1997-7.8 C (18.0 F)
1998-4.4 C (24.1 F)
1999-4.4 C (24.1 F)
2000-3.9 C (25.0 F)
2001-2.8 C (27.0 F)
2002-5.6 C (21.9 F)
2003-4.4 C (24.1 F)
2004-5.6 C (21.9 F)
2005-5.6 C (21.9 F)
2006-6.1 C (21.0 F)
2007-11.1 C (12.0 F)
2008-3.9 C (25.0 F)
2009-5.6 C (21.9 F)
2010-5.0 C (23.0 F)
2011-6.7 C (19.9 F)
2012-5.6 C (21.9 F)
2013-8.3 C (17.1 F)
2014-3.9 C (25.0 F)
2015-5.6 C (21.9 F)
2016-6.1 C (21.0 F)
2017-5.0 C (23.0 F)
2018-5.0 C (23.0 F)
2019-5.0 C (23.0 F)
2020-4.4 C (24.1 F)
2021-3.9 C (25.0 F)
2022-5.6 C (21.9 F)
2023-3.9 C (25.0 F)
2024-3.9 C (25.0 F)
2025-5.0 C (23.0 F)
2026-2.2 C (28.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Barstow by year The wettest day of the year at Barstow, 1980 to 2026. The record is 57.2 mm (2.3 in) in 1997, marked on the chart; the median year is 21.6 mm (0.9 in). 020406019801990200020102020Record: 57.2 mm (2.3 in) in 1997
The wettest day of the year at Barstow, 1980 to 2026. The record is 57.2 mm (2.3 in) in 1997, marked on the chart; the median year is 21.6 mm (0.9 in).
Wettest day (Rx1day) at Barstow by year
YearWettest day (Rx1day)
19807.9 mm (0.31 in)
198115.2 mm (0.6 in)
198225.4 mm (1.0 in)
198338.6 mm (1.5 in)
198434.5 mm (1.4 in)
198525.4 mm (1.0 in)
198617.8 mm (0.7 in)
198718.5 mm (0.7 in)
198822.9 mm (0.9 in)
198920.3 mm (0.8 in)
19904.3 mm (0.17 in)
199114.5 mm (0.6 in)
199224.4 mm (1.0 in)
199324.1 mm (0.9 in)
199411.7 mm (0.5 in)
199512.7 mm (0.5 in)
199615.2 mm (0.6 in)
199757.2 mm (2.3 in)
199839.9 mm (1.6 in)
199933.3 mm (1.3 in)
200015.2 mm (0.6 in)
200119.6 mm (0.8 in)
200210.2 mm (0.4 in)
200329.0 mm (1.1 in)
200434.3 mm (1.4 in)
200522.1 mm (0.9 in)
200613.0 mm (0.5 in)
200730.5 mm (1.2 in)
200817.0 mm (0.7 in)
20099.1 mm (0.36 in)
201046.2 mm (1.8 in)
201112.2 mm (0.5 in)
201211.9 mm (0.5 in)
201311.7 mm (0.5 in)
201419.3 mm (0.8 in)
201527.9 mm (1.1 in)
201621.8 mm (0.9 in)
201722.1 mm (0.9 in)
201820.3 mm (0.8 in)
201930.0 mm (1.2 in)
202029.5 mm (1.2 in)
202114.0 mm (0.6 in)
202221.6 mm (0.9 in)
202334.5 mm (1.4 in)
202434.0 mm (1.3 in)
202529.2 mm (1.1 in)
202612.7 mm (0.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Barstow by year The wettest five days of the year at Barstow, 1980 to 2026. The record is 137.0 mm (5.4 in) in 2010, marked on the chart; the median year is 28.2 mm (1.1 in). 05010015019801990200020102020Record: 137.0 mm (5.4 in) in 2010
The wettest five days of the year at Barstow, 1980 to 2026. The record is 137.0 mm (5.4 in) in 2010, marked on the chart; the median year is 28.2 mm (1.1 in).
Wettest five days (Rx5day) at Barstow by year
YearWettest five days (Rx5day)
19807.9 mm (0.31 in)
198115.2 mm (0.6 in)
198226.2 mm (1.0 in)
198368.5 mm (2.7 in)
198446.7 mm (1.8 in)
198525.4 mm (1.0 in)
198622.9 mm (0.9 in)
198734.3 mm (1.4 in)
198826.0 mm (1.0 in)
198928.4 mm (1.1 in)
19904.3 mm (0.17 in)
199122.1 mm (0.9 in)
199242.2 mm (1.7 in)
199335.3 mm (1.4 in)
199418.6 mm (0.7 in)
199526.9 mm (1.1 in)
199629.9 mm (1.2 in)
199757.5 mm (2.3 in)
199840.4 mm (1.6 in)
199934.8 mm (1.4 in)
200015.2 mm (0.6 in)
200140.7 mm (1.6 in)
200212.7 mm (0.5 in)
200334.8 mm (1.4 in)
200443.5 mm (1.7 in)
200543.5 mm (1.7 in)
200613.0 mm (0.5 in)
200732.8 mm (1.3 in)
200833.5 mm (1.3 in)
200913.7 mm (0.5 in)
2010137.0 mm (5.4 in)
201115.2 mm (0.6 in)
201212.7 mm (0.5 in)
201326.9 mm (1.1 in)
201419.8 mm (0.8 in)
201539.6 mm (1.6 in)
201625.7 mm (1.0 in)
201722.4 mm (0.9 in)
201828.2 mm (1.1 in)
201936.9 mm (1.5 in)
202053.6 mm (2.1 in)
202114.0 mm (0.6 in)
202222.1 mm (0.9 in)
202349.7 mm (2.0 in)
202456.8 mm (2.2 in)
202533.0 mm (1.3 in)
202625.7 mm (1.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Barstow by year The longest dry spell of the year at Barstow, 1980 to 2026. The record is 261 days in 2020, marked on the chart; the median year is 118 days. 010020030019801990200020102020Record: 261 days in 2020
The longest dry spell of the year at Barstow, 1980 to 2026. The record is 261 days in 2020, marked on the chart; the median year is 118 days.
Longest dry spell (CDD) at Barstow by year
YearLongest dry spell (CDD)
1980112 days
198181 days
198275 days
198399 days
1984180 days
198562 days
1986102 days
198750 days
198875 days
1989109 days
1990139 days
1991132 days
1992204 days
1993127 days
1994205 days
1995259 days
1996167 days
1997176 days
1998118 days
1999111 days
2000120 days
200156 days
2002134 days
2003102 days
2004129 days
200575 days
2006137 days
2007223 days
2008116 days
2009202 days
201087 days
201189 days
201271 days
2013135 days
2014120 days
201558 days
2016113 days
2017199 days
201866 days
2019160 days
2020261 days
202191 days
2022157 days
202388 days
2024170 days
2025113 days
2026172 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.

Frost Dates and Growing Season

35 years with a frost

Across 35 years with a frost, the median last spring frost at Barstow falls on 2 March and the median first autumn frost on 22 November, which leaves a median of 266 days between them.

Fitted over all years, the growing season changes by +8.3 days per decade at this station.

Frost dates and growing season at Barstow
MeasureMedian, all yearsEarliest periodRecent period (1988 to 2025)Recent against earliestFitted trend
Last spring frost2 Marchn/a2 Marchn/a-7.9 days per decade
First autumn frost22 Novembern/a23 Novembern/a+0.3 days per decade
Growing days266 daysn/a267 daysn/a+8.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

41 years, 1981 to 2025

A day with at least 22.6 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 56.9 mm (2.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Barstow: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years22.6 mm (0.9 in)
5 years32.1 mm (1.3 in)
10 years38.2 mm (1.5 in)
25 years45.9 mm (1.8 in)
50 years51.4 mm (2.0 in)Longer than the 41 years of record
100 years56.9 mm (2.2 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 1981 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: 57.2 mm (2.3 in) in 1997; 46.2 mm (1.8 in) in 2010; 39.9 mm (1.6 in) in 1998.

Download the Data

  • Data for Barstow standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Barstow 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).