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Built 2026-10-14 (14 October 2026)

Ben Bolt California Weather Records (USR0000CBLT)

Record envelope, standing records and threshold days for Ben Bolt California (USR0000CBLT), California, United States, with 34 years of record.

Key Facts for Ben Bolt California

  • Ben Bolt California (USR0000CBLT) is a weather station in California, United States at 38.59 latitude and -120.93 longitude, 276 m (905 ft) above sea level.
  • The station reports from 1990 to 2023, 34 years of record.
  • 1,464 records set at Ben Bolt California still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Ben Bolt California set a daily record high maximum temperature of 35.0 C (95.0 F) on 9 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, 38.59 latitude, -120.93 longitude.
  • Elevation: 276 m (905 ft).
  • Period of record: 1990 to 2023, 34 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

20 days at or beyond a record
Daily record high and record low at Ben Bolt California, with 2026 drawn through them The band shows the record high and record low for each calendar day at Ben Bolt California. The lines show the 2026 daily maximum and minimum. 20 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 Ben Bolt California. The lines show the 2026 daily maximum and minimum. 20 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Ben Bolt California, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-5.6 C (21.9 F)21.1 C (70.0 F)-0.6 C (30.9 F)
Feb31.1 C (88.0 F)-8.9 C (16.0 F)24.4 C (75.9 F)0.0 C (32.0 F)
Mar31.7 C (89.1 F)-2.8 C (27.0 F)31.7 C (89.1 F)4.4 C (39.9 F)
Apr35.0 C (95.0 F)-1.7 C (28.9 F)28.3 C (82.9 F)3.3 C (37.9 F)
May40.0 C (104.0 F)1.1 C (34.0 F)33.9 C (93.0 F)7.8 C (46.0 F)
Jun43.3 C (109.9 F)3.3 C (37.9 F)39.4 C (102.9 F)7.8 C (46.0 F)
Jul45.6 C (114.1 F)6.7 C (44.1 F)40.6 C (105.1 F)10.6 C (51.1 F)
Aug45.0 C (113.0 F)6.7 C (44.1 F)41.7 C (107.1 F)11.7 C (53.1 F)
Sep47.2 C (117.0 F)4.4 C (39.9 F)40.6 C (105.1 F)8.3 C (46.9 F)
Oct40.0 C (104.0 F)1.1 C (34.0 F)38.9 C (102.0 F)6.1 C (43.0 F)
Nov30.0 C (86.0 F)-4.4 C (24.1 F)n/an/a
Dec28.9 C (84.0 F)-10.6 C (12.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Ben Bolt California by the year they were set 1,464 records at Ben Bolt California still stand. 1991 holds the most, with 91. 02550751001990: 491991: 911992: 421993: 311994: 421995: 471996: 541997: 251998: 641999: 822000: 532001: 482002: 462003: 332004: 392005: 302006: 402007: 302008: 362009: 352010: 382011: 302012: 392013: 362014: 312015: 402016: 182017: 362018: 182019: 282020: 332021: 262022: 342023: 272024: 462025: 382026: 291990199419982002200620102014201820222026
1,464 records at Ben Bolt California still stand. 1991 holds the most, with 91.
Standing records at Ben Bolt California by the year they were set
Year setStanding records
199049
199191
199242
199331
199442
199547
199654
199725
199864
199982
200053
200148
200246
200333
200439
200530
200640
200730
200836
200935
201038
201130
201239
201336
201431
201540
201618
201736
201818
201928
202033
202126
202234
202327
202446
202538
202629

All-Time Record Progression

1 new records
When Ben Bolt California set new all-time records 1 all-time records were set at Ben Bolt California between 6 September 2022 and 6 September 2022. Each dot is a new record. Record high maximum temperature6 September 2022: Record high maximum temperature 47.2 C (117.0 F)
1 all-time records were set at Ben Bolt California between 6 September 2022 and 6 September 2022. Each dot is a new record.
When Ben Bolt California set new all-time records
DateKindDetail
2022-09-06Record high maximum temperatureRecord high maximum temperature 47.2 C (117.0 F)

Period of Record Coverage

1990 to 2026
Days with data per year at Ben Bolt California 37 years of record at Ben Bolt California, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 2000, 2026. 1990: 238 of 365 days1991: 354 of 365 days1992: 359 of 366 days1993: 361 of 365 days1994: 364 of 365 days1995: 365 of 365 days1996: 350 of 366 days1997: 329 of 365 days1998: 349 of 365 days1999: 365 of 365 days2000: 321 of 366 days2001: 364 of 365 days2002: 357 of 365 days2003: 365 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 355 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 365 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 284 of 365 days19901995200020052010201520202025
37 years of record at Ben Bolt California, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 2000, 2026.
Days with data per year at Ben Bolt California
YearDays with dataShare of yearComplete
199023865%No
199135497%Yes
199235998%Yes
199336199%Yes
1994364100%Yes
1995365100%Yes
199635096%Yes
199732990%Yes
199834996%Yes
1999365100%Yes
200032188%No
2001364100%Yes
200235798%Yes
2003365100%Yes
2004365100%Yes
2005365100%Yes
200635597%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016365100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021364100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628478%No

Latest Records

20
Latest records at Ben Bolt California
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Ben Bolt California, USdaily high max (Provisional)35.0 C (95.0 F)0.6 C (1.1 F)29 years12 of 100 (Routine)
8 October 2026Ben Bolt California, USdaily high min (Provisional)20.6 C (69.1 F)2.8 C (5.0 F)1 year11 of 100 (Routine)
8 October 2026Ben Bolt California, USdaily high max (Provisional)37.2 C (99.0 F)0.5 C (0.9 F)1 year3 of 100 (Routine)
7 October 2026Ben Bolt California, USdaily high min (Provisional)20.0 C (68.0 F)1.1 C (2.0 F)1 year6 of 100 (Routine)
5 October 2026Ben Bolt California, USmonthly high min (Tie, Provisional)21.1 C (70.0 F)tie2 years3 of 100 (Routine)
4 October 2026Ben Bolt California, USdaily high min (Provisional)20.6 C (69.1 F)2.3 C (4.1 F)1 year9 of 100 (Routine)
3 October 2026Ben Bolt California, USdaily high min (Tie, Provisional)19.4 C (66.9 F)tie1 year0 of 100 (Routine)
10 September 2026Ben Bolt California, USdaily high max (Provisional)40.6 C (105.1 F)1.7 C (3.1 F)11 years9 of 100 (Routine)
4 August 2026Ben Bolt California, USdaily high max40.0 C (104.0 F)0.6 C (1.1 F)20 years10 of 100 (Routine)
3 August 2026Ben Bolt California, USdaily high max41.7 C (107.1 F)1.7 C (3.1 F)1 year7 of 100 (Routine)
13 June 2026Ben Bolt California, USdaily high max39.4 C (102.9 F)0.5 C (0.9 F)11 years6 of 100 (Routine)
13 June 2026Ben Bolt California, USdaily high min (Tie)17.2 C (63.0 F)tie8 years1 of 100 (Routine)
11 May 2026Ben Bolt California, USdaily high min (Tie)15.6 C (60.1 F)tie12 years1 of 100 (Routine)
5 April 2026Ben Bolt California, USdaily high max28.3 C (82.9 F)2.7 C (4.9 F)9 years10 of 100 (Routine)
4 April 2026Ben Bolt California, USdaily high max26.7 C (80.1 F)1.7 C (3.1 F)19 years11 of 100 (Routine)
1 April 2026Ben Bolt California, USdaily high min (Tie)11.1 C (52.0 F)tie35 years3 of 100 (Routine)
31 March 2026Ben Bolt California, USdaily high min (Tie)11.1 C (52.0 F)tie35 years3 of 100 (Routine)
30 March 2026Ben Bolt California, USdaily high min12.2 C (54.0 F)1.6 C (2.9 F)33 years18 of 100 (Routine)
29 March 2026Ben Bolt California, USdaily high min11.7 C (53.1 F)2.3 C (4.1 F)21 years16 of 100 (Routine)
29 March 2026Ben Bolt California, USdaily high max28.9 C (84.0 F)0.6 C (1.1 F)21 years10 of 100 (Routine)

Climate Trend

32 complete years, 1991 to 2025
Annual mean temperature at Ben Bolt California as warming stripes, 1991 to 2025 One stripe for each of 32 complete years at Ben Bolt California, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 16.2 C (61.1 F); red stripes are warmer. The coolest year was 1999, at 14.9 C (58.7 F), and the warmest was 2014, at 17.7 C (63.8 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1991: 16.0 C, -0.2 C from the station mean1992: 16.1 C, -0.1 C from the station mean1993: 15.6 C, -0.5 C from the station mean1994: 14.9 C, -1.3 C from the station mean1995: 15.9 C, -0.3 C from the station mean1998: 15.5 C, -0.7 C from the station mean1999: 14.9 C, -1.3 C from the station mean2001: 16.2 C, 0.0 C from the station mean2002: 15.8 C, -0.3 C from the station mean2003: 16.2 C, 0.0 C from the station mean2004: 16.1 C, -0.1 C from the station mean2005: 16.2 C, 0.0 C from the station mean2006: 15.9 C, -0.3 C from the station mean2007: 15.5 C, -0.7 C from the station mean2008: 15.8 C, -0.3 C from the station mean2009: 15.9 C, -0.3 C from the station mean2010: 15.4 C, -0.7 C from the station mean2011: 15.0 C, -1.1 C from the station mean2012: 16.3 C, +0.1 C from the station mean2013: 16.4 C, +0.2 C from the station mean2014: 17.7 C, +1.5 C from the station mean2015: 17.0 C, +0.8 C from the station mean2016: 16.7 C, +0.6 C from the station mean2017: 17.0 C, +0.8 C from the station mean2018: 16.7 C, +0.5 C from the station mean2019: 16.3 C, +0.1 C from the station mean2020: 17.2 C, +1.0 C from the station mean2021: 16.6 C, +0.5 C from the station mean2022: 16.9 C, +0.7 C from the station mean2023: 16.0 C, -0.1 C from the station mean2024: 17.4 C, +1.2 C from the station mean2025: 16.6 C, +0.4 C from the station mean19911995200020052010201520202025
One stripe for each of 32 complete years at Ben Bolt California, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 16.2 C (61.1 F); red stripes are warmer. The coolest year was 1999, at 14.9 C (58.7 F), and the warmest was 2014, at 17.7 C (63.8 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Ben Bolt California as warming stripes, 1991 to 2025
YearAnnual mean temperatureDifference from the station mean
199116.0 C-0.21 C
199216.1 C-0.08 C
199315.6 C-0.54 C
199414.9 C-1.29 C
199515.9 C-0.32 C
199815.5 C-0.71 C
199914.9 C-1.32 C
200116.2 C-0.02 C
200215.8 C-0.33 C
200316.2 C+0.02 C
200416.1 C-0.12 C
200516.2 C+0.02 C
200615.9 C-0.28 C
200715.5 C-0.70 C
200815.8 C-0.33 C
200915.9 C-0.32 C
201015.4 C-0.73 C
201115.0 C-1.13 C
201216.3 C+0.11 C
201316.4 C+0.24 C
201417.7 C+1.48 C
201517.0 C+0.83 C
201616.7 C+0.56 C
201717.0 C+0.83 C
201816.7 C+0.50 C
201916.3 C+0.13 C
202017.2 C+0.99 C
202116.6 C+0.47 C
202216.9 C+0.70 C
202316.0 C-0.15 C
202417.4 C+1.18 C
202516.6 C+0.40 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1991 to 2025. In Fahrenheit: 0.8 F (0.4 to 1.1) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ben Bolt California
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.2 to 0.6) per decade0.8 F (0.4 to 1.1) per decade1991 to 202532Rise
Mean daily maximum0.4 C (0.2 to 0.7) per decade0.8 F (0.3 to 1.3) per decade1991 to 202532Rise
Mean daily minimum0.4 C (0.2 to 0.6) per decade0.7 F (0.4 to 1.1) per decade1991 to 202532Rise

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

1990 to 2026
Yearly extremes at Ben Bolt California: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)47.2 C (117.0 F)202242.8 C (109.0 F)37
Coldest night (TNn)-10.6 C (12.9 F)1990-3.3 C (26.1 F)37

Hottest day (TXx)

Hottest day (TXx) at Ben Bolt California by year The hottest day of the year at Ben Bolt California, 1990 to 2026. The record is 47.2 C (117.0 F) in 2022, marked on the chart; the median year is 42.8 C (109.0 F). 37.54042.54547.51990200020102020Record: 47.2 C (117.0 F) in 2022
The hottest day of the year at Ben Bolt California, 1990 to 2026. The record is 47.2 C (117.0 F) in 2022, marked on the chart; the median year is 42.8 C (109.0 F).
Hottest day (TXx) at Ben Bolt California by year
YearHottest day (TXx)
199040.0 C (104.0 F)
199142.8 C (109.0 F)
199240.0 C (104.0 F)
199341.1 C (106.0 F)
199440.0 C (104.0 F)
199541.1 C (106.0 F)
199642.8 C (109.0 F)
199742.8 C (109.0 F)
199845.0 C (113.0 F)
199941.7 C (107.1 F)
200041.1 C (106.0 F)
200142.8 C (109.0 F)
200244.4 C (111.9 F)
200342.2 C (108.0 F)
200441.1 C (106.0 F)
200543.3 C (109.9 F)
200644.4 C (111.9 F)
200743.3 C (109.9 F)
200842.2 C (108.0 F)
200942.8 C (109.0 F)
201042.8 C (109.0 F)
201138.9 C (102.0 F)
201242.2 C (108.0 F)
201342.8 C (109.0 F)
201442.8 C (109.0 F)
201542.2 C (108.0 F)
201642.2 C (108.0 F)
201744.4 C (111.9 F)
201841.7 C (107.1 F)
201941.7 C (107.1 F)
202043.9 C (111.0 F)
202144.4 C (111.9 F)
202247.2 C (117.0 F)
202343.3 C (109.9 F)
202445.6 C (114.1 F)
202540.6 C (105.1 F)
202641.7 C (107.1 F)

Coldest night (TNn)

Coldest night (TNn) at Ben Bolt California by year The coldest night of the year at Ben Bolt California, 1990 to 2026. The record is -10.6 C (12.9 F) in 1990, marked on the chart; the median year is -3.3 C (26.1 F). -12.5-10-7.5-5-2.501990200020102020Record: -10.6 C (12.9 F) in 1990
The coldest night of the year at Ben Bolt California, 1990 to 2026. The record is -10.6 C (12.9 F) in 1990, marked on the chart; the median year is -3.3 C (26.1 F).
Coldest night (TNn) at Ben Bolt California by year
YearColdest night (TNn)
1990-10.6 C (12.9 F)
1991-8.9 C (16.0 F)
1992-5.0 C (23.0 F)
1993-5.0 C (23.0 F)
1994-3.9 C (25.0 F)
1995-0.6 C (30.9 F)
1996-1.7 C (28.9 F)
1997-2.8 C (27.0 F)
1998-8.9 C (16.0 F)
1999-4.4 C (24.1 F)
2000-2.8 C (27.0 F)
2001-3.3 C (26.1 F)
2002-4.4 C (24.1 F)
2003-2.8 C (27.0 F)
2004-3.3 C (26.1 F)
2005-2.2 C (28.0 F)
2006-3.3 C (26.1 F)
2007-5.6 C (21.9 F)
2008-3.3 C (26.1 F)
2009-5.6 C (21.9 F)
2010-3.3 C (26.1 F)
2011-3.9 C (25.0 F)
2012-4.4 C (24.1 F)
2013-5.0 C (23.0 F)
2014-1.7 C (28.9 F)
2015-3.3 C (26.1 F)
2016-2.2 C (28.0 F)
2017-2.2 C (28.0 F)
2018-4.4 C (24.1 F)
2019-2.8 C (27.0 F)
2020-2.2 C (28.0 F)
2021-2.2 C (28.0 F)
2022-3.3 C (26.1 F)
2023-3.3 C (26.1 F)
2024-1.7 C (28.9 F)
2025-1.1 C (30.0 F)
2026-0.6 C (30.9 F)

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

31 years with a frost

Across 31 years with a frost, the median last spring frost at Ben Bolt California falls on 12 March and the median first autumn frost on 30 November, which leaves a median of 267 days between them.

Fitted over all years, the growing season changes by +4.6 days per decade at this station.

Frost dates and growing season at Ben Bolt California
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost12 Marchn/a14 Marchn/a+0.2 days per decade
First autumn frost30 Novembern/a29 Novembern/a+4.8 days per decade
Growing days267 daysn/a263 daysn/a+4.6 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.

Download the Data

  • Data for Ben Bolt California standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Ben Bolt California 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

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