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Built 2026-10-14 (14 October 2026)

Quartz Hill California Weather Records (USR0000CQUA)

Record envelope, standing records and threshold days for Quartz Hill California (USR0000CQUA), California, United States, with 34 years of record.

Key Facts for Quartz Hill California

  • Quartz Hill California (USR0000CQUA) is a weather station in California, United States at 41.60 latitude and -122.93 longitude, 1,288 m (4,225 ft) above sea level.
  • The station reports from 1990 to 2023, 34 years of record.
  • 1,464 records set at Quartz Hill California still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Quartz Hill California tied a monthly record high maximum temperature of 33.3 C (91.9 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, 41.60 latitude, -122.93 longitude.
  • Elevation: 1,288 m (4,225 ft).
  • Period of record: 1990 to 2023, 34 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

31 days at or beyond a record
Daily record high and record low at Quartz Hill California, with 2026 drawn through them The band shows the record high and record low for each calendar day at Quartz Hill California. The lines show the 2026 daily maximum and minimum. 31 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 Quartz Hill California. The lines show the 2026 daily maximum and minimum. 31 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Quartz Hill California, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.8 C (64.0 F)-16.1 C (3.0 F)15.0 C (59.0 F)-4.4 C (24.1 F)
Feb20.0 C (68.0 F)-10.0 C (14.0 F)18.9 C (66.0 F)-6.7 C (19.9 F)
Mar27.8 C (82.0 F)-10.0 C (14.0 F)27.8 C (82.0 F)-1.1 C (30.0 F)
Apr30.6 C (87.1 F)-6.7 C (19.9 F)24.4 C (75.9 F)-3.3 C (26.1 F)
May35.6 C (96.1 F)-5.6 C (21.9 F)31.7 C (89.1 F)1.1 C (34.0 F)
Jun39.4 C (102.9 F)-5.0 C (23.0 F)36.1 C (97.0 F)3.9 C (39.0 F)
Jul42.2 C (108.0 F)2.8 C (37.0 F)35.0 C (95.0 F)9.4 C (48.9 F)
Aug40.6 C (105.1 F)3.3 C (37.9 F)39.4 C (102.9 F)11.1 C (52.0 F)
Sep38.3 C (100.9 F)0.0 C (32.0 F)34.4 C (93.9 F)5.0 C (41.0 F)
Oct33.3 C (91.9 F)-3.3 C (26.1 F)33.3 C (91.9 F)6.1 C (43.0 F)
Nov23.9 C (75.0 F)-8.9 C (16.0 F)n/an/a
Dec16.7 C (62.1 F)-18.3 C (-0.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Quartz Hill California by the year they were set 1,464 records at Quartz Hill California still stand. 1995 holds the most, with 66. 0204060801990: 601991: 501992: 441993: 601994: 391995: 661996: 451997: 341998: 271999: 442000: 412001: 502002: 312003: 442004: 322005: 332006: 352007: 312008: 612009: 362010: 322011: 252012: 332013: 302014: 272015: 502016: 392017: 392018: 182019: 382020: 352021: 332022: 582023: 362024: 322025: 372026: 391990199419982002200620102014201820222026
1,464 records at Quartz Hill California still stand. 1995 holds the most, with 66.
Standing records at Quartz Hill California by the year they were set
Year setStanding records
199060
199150
199244
199360
199439
199566
199645
199734
199827
199944
200041
200150
200231
200344
200432
200533
200635
200731
200861
200936
201032
201125
201233
201330
201427
201550
201639
201739
201818
201938
202035
202133
202258
202336
202432
202537
202639

Period of Record Coverage

1990 to 2026
Days with data per year at Quartz Hill California 37 years of record at Quartz Hill California, 1990 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1990, 2001, 2002, 2005, 2026. 1990: 235 of 365 days1991: 361 of 365 days1992: 366 of 366 days1993: 361 of 365 days1994: 365 of 365 days1995: 361 of 365 days1996: 361 of 366 days1997: 357 of 365 days1998: 342 of 365 days1999: 365 of 365 days2000: 364 of 366 days2001: 323 of 365 days2002: 201 of 365 days2003: 365 of 365 days2004: 356 of 366 days2005: 289 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 364 of 365 days2011: 365 of 365 days2012: 365 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 283 of 365 days19901995200020052010201520202025
37 years of record at Quartz Hill California, 1990 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1990, 2001, 2002, 2005, 2026.
Days with data per year at Quartz Hill California
YearDays with dataShare of yearComplete
199023564%No
199136199%Yes
1992366100%Yes
199336199%Yes
1994365100%Yes
199536199%Yes
199636199%Yes
199735798%Yes
199834294%Yes
1999365100%Yes
200036499%Yes
200132388%No
200220155%No
2003365100%Yes
200435697%Yes
200528979%No
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010364100%Yes
2011365100%Yes
2012365100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628378%No

Latest Records

20
Latest records at Quartz Hill California
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026Quartz Hill California, USmonthly high max (Tie, Provisional)33.3 C (91.9 F)tie25 years5 of 100 (Routine)
8 October 2026Quartz Hill California, USmonthly high min (Tie, Provisional)17.8 C (64.0 F)tie16 years4 of 100 (Routine)
7 October 2026Quartz Hill California, USdaily high max (Provisional)32.8 C (91.0 F)2.2 C (4.0 F)29 years14 of 100 (Routine)
7 October 2026Quartz Hill California, USmonthly high min (Tie, Provisional)17.8 C (64.0 F)tie16 years4 of 100 (Routine)
6 October 2026Quartz Hill California, USdaily high min (Provisional)17.2 C (63.0 F)1.6 C (2.9 F)12 years9 of 100 (Routine)
6 October 2026Quartz Hill California, USdaily high max (Provisional)31.7 C (89.1 F)0.6 C (1.1 F)4 years4 of 100 (Routine)
5 October 2026Quartz Hill California, USdaily high min (Provisional)17.2 C (63.0 F)2.2 C (4.0 F)4 years9 of 100 (Routine)
5 October 2026Quartz Hill California, USdaily high max (Provisional)32.2 C (90.0 F)1.6 C (2.9 F)4 years6 of 100 (Routine)
4 October 2026Quartz Hill California, USdaily high min (Provisional)17.2 C (63.0 F)1.6 C (2.9 F)24 years13 of 100 (Routine)
3 October 2026Quartz Hill California, USdaily high min (Provisional)16.7 C (62.1 F)0.6 C (1.1 F)32 years13 of 100 (Routine)
3 October 2026Quartz Hill California, USdaily high max (Tie, Provisional)31.7 C (89.1 F)tie1 year0 of 100 (Routine)
9 September 2026Quartz Hill California, USdaily high max (Tie, Provisional)34.4 C (93.9 F)tie32 years3 of 100 (Routine)
4 September 2026Quartz Hill California, USdaily low min (Tie, Provisional)5.0 C (41.0 F)tie25 years2 of 100 (Routine)
3 September 2026Quartz Hill California, USdaily low max (Provisional)15.0 C (59.0 F)1.1 C (2.0 F)25 years12 of 100 (Routine)
2 September 2026Quartz Hill California, USdaily low max (Provisional)12.8 C (55.0 F)3.3 C (5.9 F)25 years16 of 100 (Routine)
7 August 2026Quartz Hill California, USdaily high max39.4 C (102.9 F)3.3 C (5.9 F)24 years17 of 100 (Routine)
7 August 2026Quartz Hill California, USdaily high min (Tie)21.7 C (71.1 F)tie24 years2 of 100 (Routine)
6 August 2026Quartz Hill California, USdaily high min (Tie)21.7 C (71.1 F)tie24 years2 of 100 (Routine)
5 August 2026Quartz Hill California, USdaily high min22.2 C (72.0 F)1.1 C (2.0 F)28 years14 of 100 (Routine)
5 August 2026Quartz Hill California, USdaily high max38.3 C (100.9 F)0.5 C (0.9 F)20 years10 of 100 (Routine)

Climate Trend

31 complete years, 1991 to 2025
Annual mean temperature at Quartz Hill California as warming stripes, 1991 to 2025 One stripe for each of 31 complete years at Quartz Hill California, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 11.7 C (53.1 F); red stripes are warmer. The coolest year was 1993, at 9.7 C (49.5 F), and the warmest was 2015, at 13.1 C (55.6 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1991: 11.1 C, -0.6 C from the station mean1992: 12.1 C, +0.3 C from the station mean1993: 9.7 C, -2.0 C from the station mean1994: 10.9 C, -0.8 C from the station mean1995: 11.1 C, -0.6 C from the station mean1996: 11.4 C, -0.4 C from the station mean1997: 10.9 C, -0.9 C from the station mean1999: 10.8 C, -1.0 C from the station mean2000: 11.5 C, -0.3 C from the station mean2003: 12.2 C, +0.5 C from the station mean2004: 12.1 C, +0.4 C from the station mean2006: 11.7 C, 0.0 C from the station mean2007: 11.9 C, +0.2 C from the station mean2008: 11.7 C, -0.1 C from the station mean2009: 11.7 C, 0.0 C from the station mean2010: 10.6 C, -1.2 C from the station mean2011: 10.7 C, -1.1 C from the station mean2012: 11.7 C, -0.1 C from the station mean2013: 12.0 C, +0.2 C from the station mean2014: 13.0 C, +1.3 C from the station mean2015: 13.1 C, +1.4 C from the station mean2016: 11.9 C, +0.2 C from the station mean2017: 11.7 C, 0.0 C from the station mean2018: 12.4 C, +0.6 C from the station mean2019: 11.6 C, -0.2 C from the station mean2020: 12.7 C, +1.0 C from the station mean2021: 12.5 C, +0.8 C from the station mean2022: 12.5 C, +0.8 C from the station mean2023: 11.6 C, -0.1 C from the station mean2024: 12.5 C, +0.8 C from the station mean2025: 12.8 C, +1.0 C from the station mean19911995200020052010201520202025
One stripe for each of 31 complete years at Quartz Hill California, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 11.7 C (53.1 F); red stripes are warmer. The coolest year was 1993, at 9.7 C (49.5 F), and the warmest was 2015, at 13.1 C (55.6 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Quartz Hill California as warming stripes, 1991 to 2025
YearAnnual mean temperatureDifference from the station mean
199111.1 C-0.62 C
199212.1 C+0.32 C
19939.7 C-2.01 C
199410.9 C-0.83 C
199511.1 C-0.64 C
199611.4 C-0.36 C
199710.9 C-0.88 C
199910.8 C-0.98 C
200011.5 C-0.26 C
200312.2 C+0.47 C
200412.1 C+0.39 C
200611.7 C-0.03 C
200711.9 C+0.17 C
200811.7 C-0.07 C
200911.7 C0.00 C
201010.6 C-1.15 C
201110.7 C-1.09 C
201211.7 C-0.07 C
201312.0 C+0.21 C
201413.0 C+1.30 C
201513.1 C+1.38 C
201611.9 C+0.17 C
201711.7 C-0.03 C
201812.4 C+0.64 C
201911.6 C-0.15 C
202012.7 C+1.00 C
202112.5 C+0.76 C
202212.5 C+0.79 C
202311.6 C-0.10 C
202412.5 C+0.76 C
202512.8 C+1.05 C

The annual mean temperature here has risen by 0.5 C (0.2 to 0.7) per decade over 1991 to 2025. In Fahrenheit: 0.8 F (0.4 to 1.2) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Quartz Hill California
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.5 C (0.2 to 0.7) per decade0.8 F (0.4 to 1.2) per decade1991 to 202531Rise
Mean daily maximum0.5 C (0.2 to 0.8) per decade0.9 F (0.4 to 1.4) per decade1991 to 202531Rise
Mean daily minimum0.4 C (0.2 to 0.6) per decade0.8 F (0.4 to 1.1) per decade1991 to 202531Rise

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 Quartz Hill California: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)200238.3 C (100.9 F)37
Coldest night (TNn)-18.3 C (-0.9 F)1990-8.9 C (16.0 F)37

Hottest day (TXx)

Hottest day (TXx) at Quartz Hill California by year The hottest day of the year at Quartz Hill California, 1990 to 2026. The record is 42.2 C (108.0 F) in 2002, marked on the chart; the median year is 38.3 C (100.9 F). 3436384042441990200020102020Record: 42.2 C (108.0 F) in 2002
The hottest day of the year at Quartz Hill California, 1990 to 2026. The record is 42.2 C (108.0 F) in 2002, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Quartz Hill California by year
YearHottest day (TXx)
199037.8 C (100.0 F)
199138.3 C (100.9 F)
199238.3 C (100.9 F)
199336.7 C (98.1 F)
199436.7 C (98.1 F)
199534.4 C (93.9 F)
199637.2 C (99.0 F)
199740.6 C (105.1 F)
199839.4 C (102.9 F)
199938.3 C (100.9 F)
200036.7 C (98.1 F)
200140.0 C (104.0 F)
200242.2 C (108.0 F)
200340.6 C (105.1 F)
200438.3 C (100.9 F)
200538.9 C (102.0 F)
200640.6 C (105.1 F)
200739.4 C (102.9 F)
200839.4 C (102.9 F)
200938.9 C (102.0 F)
201037.8 C (100.0 F)
201135.6 C (96.1 F)
201238.3 C (100.9 F)
201338.3 C (100.9 F)
201438.3 C (100.9 F)
201537.8 C (100.0 F)
201638.9 C (102.0 F)
201739.4 C (102.9 F)
201837.8 C (100.0 F)
201937.2 C (99.0 F)
202038.3 C (100.9 F)
202139.4 C (102.9 F)
202242.2 C (108.0 F)
202338.3 C (100.9 F)
202440.6 C (105.1 F)
202538.9 C (102.0 F)
202639.4 C (102.9 F)

Coldest night (TNn)

Coldest night (TNn) at Quartz Hill California by year The coldest night of the year at Quartz Hill California, 1990 to 2026. The record is -18.3 C (-0.9 F) in 1990, marked on the chart; the median year is -8.9 C (16.0 F). -20-15-10-51990200020102020Record: -18.3 C (-0.9 F) in 1990
The coldest night of the year at Quartz Hill California, 1990 to 2026. The record is -18.3 C (-0.9 F) in 1990, marked on the chart; the median year is -8.9 C (16.0 F).
Coldest night (TNn) at Quartz Hill California by year
YearColdest night (TNn)
1990-18.3 C (-0.9 F)
1991-10.0 C (14.0 F)
1992-6.7 C (19.9 F)
1993-10.0 C (14.0 F)
1994-7.8 C (18.0 F)
1995-7.8 C (18.0 F)
1996-16.1 C (3.0 F)
1997-11.1 C (12.0 F)
1998-15.0 C (5.0 F)
1999-7.2 C (19.0 F)
2000-5.6 C (21.9 F)
2001-7.2 C (19.0 F)
2002-6.1 C (21.0 F)
2003-6.7 C (19.9 F)
2004-8.3 C (17.1 F)
2005-7.2 C (19.0 F)
2006-9.4 C (15.1 F)
2007-10.6 C (12.9 F)
2008-8.9 C (16.0 F)
2009-11.7 C (10.9 F)
2010-8.9 C (16.0 F)
2011-10.0 C (14.0 F)
2012-7.2 C (19.0 F)
2013-12.8 C (9.0 F)
2014-7.8 C (18.0 F)
2015-8.3 C (17.1 F)
2016-10.6 C (12.9 F)
2017-12.8 C (9.0 F)
2018-9.4 C (15.1 F)
2019-8.3 C (17.1 F)
2020-6.7 C (19.9 F)
2021-7.2 C (19.0 F)
2022-8.9 C (16.0 F)
2023-9.4 C (15.1 F)
2024-7.2 C (19.0 F)
2025-9.4 C (15.1 F)
2026-6.7 C (19.9 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 Quartz Hill California falls on 11 May and the median first autumn frost on 26 October, which leaves a median of 164 days between them.

Fitted over all years, the growing season changes by +4.7 days per decade at this station.

Frost dates and growing season at Quartz Hill California
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost11 Mayn/a10 Mayn/a-4.9 days per decade
First autumn frost26 Octobern/a26 Octobern/a-0.1 days per decade
Growing days164 daysn/a167 daysn/a+4.7 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 Quartz Hill California standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Quartz Hill 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 (2026-10-12).