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Built 2026-10-19 (19 October 2026)

Altar (Obs) Weather Records (MXM00076113)

Record envelope, standing records and threshold days for Altar (Obs) (MXM00076113), Mexico, with 78 years of record.

Key Facts for Altar (Obs)

  • Altar (Obs) (MXM00076113) is a weather station in Mexico at 30.72 latitude and -111.83 longitude, 421 m (1,381 ft) above sea level.
  • The station reports from 1949 to 2026, 78 years of record.
  • 1,464 records set at Altar (Obs) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Altar (Obs) set a monthly record high maximum temperature of 48.5 C (119.3 F) on 19 August 2025.

About the Station

  • Location: Mexico, 30.72 latitude, -111.83 longitude.
  • Elevation: 421 m (1,381 ft).
  • Period of record: 1949 to 2026, 78 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

4 days at or beyond a record
Daily record high and record low at Altar (Obs), with 2026 drawn through them The band shows the record high and record low for each calendar day at Altar (Obs). The lines show the 2026 daily maximum and minimum. 4 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 Altar (Obs). The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Altar (Obs), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan33.0 C (91.4 F)-10.0 C (14.0 F)24.0 C (75.2 F)1.0 C (33.8 F)
Feb35.6 C (96.1 F)-7.2 C (19.0 F)32.5 C (90.5 F)5.0 C (41.0 F)
Mar39.0 C (102.2 F)-6.1 C (21.0 F)39.0 C (102.2 F)5.0 C (41.0 F)
Apr42.8 C (109.0 F)-1.7 C (28.9 F)36.5 C (97.7 F)3.0 C (37.4 F)
May46.1 C (115.0 F)1.7 C (35.1 F)41.0 C (105.8 F)11.0 C (51.8 F)
Jun48.8 C (119.8 F)3.9 C (39.0 F)45.3 C (113.5 F)19.0 C (66.2 F)
Jul47.8 C (118.0 F)10.0 C (50.0 F)44.8 C (112.6 F)19.0 C (66.2 F)
Aug48.5 C (119.3 F)11.7 C (53.1 F)48.5 C (119.3 F)22.0 C (71.6 F)
Sep45.6 C (114.1 F)6.7 C (44.1 F)n/an/a
Oct45.0 C (113.0 F)0.0 C (32.0 F)n/an/a
Nov40.6 C (105.1 F)-4.4 C (24.1 F)n/an/a
Dec38.3 C (100.9 F)-8.3 C (17.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Altar (Obs) by the year they were set 1,464 records at Altar (Obs) still stand. 1961 holds the most, with 146. 0501001501949: 51950: 161951: 81961: 1461962: 1171963: 381964: 1251965: 291966: 181967: 181969: 161970: 71971: 401972: 251973: 191974: 111975: 211976: 171977: 141978: 241979: 261980: 201981: 271982: 261983: 191984: 201985: 251986: 221987: 231988: 91989: 241990: 121991: 151992: 111993: 211994: 231995: 21996: 151997: 241998: 131999: 142000: 232001: 202002: 132003: 252004: 302005: 92006: 182007: 112008: 22009: 132010: 132011: 292012: 202013: 242014: 62015: 112016: 132017: 172018: 102019: 132020: 182021: 42022: 42023: 22024: 52025: 61949196519731980198719942001200820152022
1,464 records at Altar (Obs) still stand. 1961 holds the most, with 146.
Standing records at Altar (Obs) by the year they were set
Year setStanding records
19495
195016
19518
1961146
1962117
196338
1964125
196529
196618
196718
196916
19707
197140
197225
197319
197411
197521
197617
197714
197824
197926
198020
198127
198226
198319
198420
198525
198622
198723
19889
198924
199012
199115
199211
199321
199423
19952
199615
199724
199813
199914
200023
200120
200213
200325
200430
20059
200618
200711
20082
200913
201013
201129
201220
201324
20146
201511
201613
201717
201810
201913
202018
20214
20224
20232
20245
20256

All-Time Record Progression

3 new records
When Altar (Obs) set new all-time records 3 all-time records were set at Altar (Obs) between 16 July 2010 and 8 January 2024. Each dot is a new record. Record high minimum temperatureRecord high maximum temperatureRecord low maximum temperature16 July 2010: Record high minimum temperature 31.1 C (88.0 F)20 June 2016: Record high maximum temperature 48.8 C (119.8 F)8 January 2024: Record low maximum temperature 5.5 C (41.9 F)2010201520202025
3 all-time records were set at Altar (Obs) between 16 July 2010 and 8 January 2024. Each dot is a new record.
When Altar (Obs) set new all-time records
DateKindDetail
2010-07-16Record high minimum temperatureRecord high minimum temperature 31.1 C (88.0 F)
2016-06-20Record high maximum temperatureRecord high maximum temperature 48.8 C (119.8 F)
2024-01-08Record low maximum temperatureRecord low maximum temperature 5.5 C (41.9 F)

Wettest Day of Each Month

Oct: 112.3 mm (4.4 in)
Record daily precipitation for each month at Altar (Obs) The wettest day on record for each calendar month at Altar (Obs). The most was 112.3 mm (4.4 in) on 1 October 1983. 050100150 Jan: 51.1 mm (2.0 in), 18 January 1993 Jan Feb: 61.5 mm (2.4 in), 14 February 2003 Feb Mar: 40.9 mm (1.6 in), 12 March 1973 Mar Apr: 22.6 mm (0.9 in), 2 April 2004 Apr May: 58.2 mm (2.3 in), 14 May 1987 May Jun: 34.8 mm (1.4 in), 24 June 2008 Jun Jul: 101.3 mm (4.0 in), 31 July 1971 Jul Aug: 85.3 mm (3.4 in), 27 August 1999 Aug Sep: 58.7 mm (2.3 in), 18 September 2014 Sep Oct: 112.3 mm (4.4 in), 1 October 1983 Oct Nov: 26.4 mm (1.0 in), 12 November 2003 Nov Dec: 59.9 mm (2.4 in), 14 December 1967 Dec
The wettest day on record for each calendar month at Altar (Obs). The most was 112.3 mm (4.4 in) on 1 October 1983.
Record daily precipitation for each month at Altar (Obs)
MonthRecord daily precipitation (mm)Date
Jan51.1 mm (2.0 in)18 January 1993
Feb61.5 mm (2.4 in)14 February 2003
Mar40.9 mm (1.6 in)12 March 1973
Apr22.6 mm (0.9 in)2 April 2004
May58.2 mm (2.3 in)14 May 1987
Jun34.8 mm (1.4 in)24 June 2008
Jul101.3 mm (4.0 in)31 July 1971
Aug85.3 mm (3.4 in)27 August 1999
Sep58.7 mm (2.3 in)18 September 2014
Oct112.3 mm (4.4 in)1 October 1983
Nov26.4 mm (1.0 in)12 November 2003
Dec59.9 mm (2.4 in)14 December 1967

Period of Record Coverage

1949 to 2025
Days with data per year at Altar (Obs) 67 years of record at Altar (Obs), 1949 to 2025. 32 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1951, 1962, 1970, 1990, 1991, 1995 and others. 1949: 265 of 365 days1950: 287 of 365 days1951: 217 of 365 days1961: 364 of 365 days1962: 304 of 365 days1963: 364 of 365 days1964: 344 of 366 days1965: 364 of 365 days1966: 364 of 365 days1967: 363 of 365 days1969: 360 of 365 days1970: 309 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 364 of 365 days1974: 364 of 365 days1975: 333 of 365 days1976: 366 of 366 days1977: 363 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 363 of 366 days1981: 365 of 365 days1982: 359 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 361 of 365 days1986: 363 of 365 days1987: 363 of 365 days1988: 365 of 366 days1989: 344 of 365 days1990: 237 of 365 days1991: 318 of 365 days1992: 349 of 366 days1993: 330 of 365 days1994: 353 of 365 days1995: 56 of 365 days1996: 275 of 366 days1997: 332 of 365 days1998: 315 of 365 days1999: 269 of 365 days2000: 301 of 366 days2001: 334 of 365 days2002: 313 of 365 days2003: 364 of 365 days2004: 333 of 366 days2005: 298 of 365 days2006: 322 of 365 days2007: 274 of 365 days2008: 247 of 366 days2009: 222 of 365 days2010: 248 of 365 days2011: 344 of 365 days2012: 364 of 366 days2013: 320 of 365 days2014: 201 of 365 days2015: 171 of 365 days2016: 246 of 366 days2017: 253 of 365 days2018: 252 of 365 days2019: 243 of 365 days2020: 184 of 366 days2021: 137 of 365 days2022: 106 of 365 days2023: 30 of 365 days2024: 70 of 366 days2025: 66 of 365 days1950197019801990200020102020
67 years of record at Altar (Obs), 1949 to 2025. 32 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1951, 1962, 1970, 1990, 1991, 1995 and others.
Days with data per year at Altar (Obs)
YearDays with dataShare of yearComplete
194926573%No
195028779%No
195121759%No
1961364100%Yes
196230483%No
1963364100%Yes
196434494%Yes
1965364100%Yes
1966364100%Yes
196736399%Yes
196936099%Yes
197030985%No
1971365100%Yes
197236499%Yes
1973364100%Yes
1974364100%Yes
197533391%Yes
1976366100%Yes
197736399%Yes
1978365100%Yes
1979364100%Yes
198036399%Yes
1981365100%Yes
198235998%Yes
1983365100%Yes
1984366100%Yes
198536199%Yes
198636399%Yes
198736399%Yes
1988365100%Yes
198934494%Yes
199023765%No
199131887%No
199234995%Yes
199333090%Yes
199435397%Yes
19955615%No
199627575%No
199733291%Yes
199831586%No
199926974%No
200030182%No
200133492%Yes
200231386%No
2003364100%Yes
200433391%Yes
200529882%No
200632288%No
200727475%No
200824767%No
200922261%No
201024868%No
201134494%Yes
201236499%Yes
201332088%No
201420155%No
201517147%No
201624667%No
201725369%No
201825269%No
201924367%No
202018450%No
202113738%No
202210629%No
2023308%No
20247019%No
20256618%No

Latest Records

20
Latest records at Altar (Obs)
DateStationRecordValueBeat old record byOld record stoodSignificance
19 August 2025Altar (Obs), MXmonthly high max48.5 C (119.3 F)1.7 C (3.1 F)5 years23 of 100 (Routine)
8 August 2025Altar (Obs), MXdaily high max45.2 C (113.4 F)1.9 C (3.4 F)44 years26 of 100 (Routine)
7 August 2025Altar (Obs), MXdaily high max46.5 C (115.7 F)0.4 C (0.7 F)44 years21 of 100 (Routine)
25 July 2025Altar (Obs), MXdaily low max32.0 C (89.6 F)0.8 C (1.4 F)43 years21 of 100 (Routine)
24 July 2025Altar (Obs), MXdaily low max30.0 C (86.0 F)3.3 C (5.9 F)32 years26 of 100 (Routine)
26 March 2025Altar (Obs), MXmonthly high max39.0 C (102.2 F)0.7 C (1.3 F)21 years24 of 100 (Routine)
7 November 2024Altar (Obs), MXdaily low min (Tie)5.0 C (41.0 F)tie53 years5 of 100 (Routine)
9 October 2024Altar (Obs), MXdaily high max41.5 C (106.7 F)0.9 C (1.6 F)74 years30 of 100 (Routine)
11 September 2024Altar (Obs), MXdaily high max44.0 C (111.2 F)0.5 C (0.9 F)34 years18 of 100 (Routine)
1 August 2024Altar (Obs), MXdaily low max31.0 C (87.8 F)0.1 C (0.2 F)60 years25 of 100 (Routine)
9 January 2024Altar (Obs), MXdaily low max6.0 C (42.8 F)5.1 C (9.2 F)22 years25 of 100 (Routine)
8 January 2024Altar (Obs), MXall-time low max5.5 C (41.9 F)2.3 C (4.1 F)54 years48 of 100 (Notable)
26 October 2023Altar (Obs), MXdaily rain1.5 mm (0.06 in)1.5 mm (0.06 in)61 years20 of 100 (Routine)
14 September 2023Altar (Obs), MXdaily high min (Tie)25.0 C (77.0 F)tie25 years3 of 100 (Routine)
22 August 2023Altar (Obs), MXdaily low max32.0 C (89.6 F)1.9 C (3.4 F)52 years28 of 100 (Routine)
18 August 2023Altar (Obs), MXdaily high max44.0 C (111.2 F)0.1 C (0.2 F)13 years11 of 100 (Routine)
8 November 2022Altar (Obs), MXdaily rain22.1 mm (0.9 in)9.1 mm (0.36 in)56 years20 of 100 (Routine)
19 August 2022Altar (Obs), MXdaily rain35.1 mm (1.4 in)4.1 mm (0.16 in)51 years23 of 100 (Routine)
12 July 2022Altar (Obs), MXdaily high max45.7 C (114.3 F)0.1 C (0.2 F)36 years18 of 100 (Routine)
28 June 2022Altar (Obs), MXdaily rain2.5 mm (0.10 in)2.5 mm (0.10 in)60 years20 of 100 (Routine)

Climate Trend

29 complete years, 1961 to 2012
Annual mean temperature at Altar (Obs) as warming stripes, 1961 to 2012 One stripe for each of 29 complete years at Altar (Obs), 1961 to 2012. Blue stripes are years cooler than the station's own mean of 21.9 C (71.3 F); red stripes are warmer. The coolest year was 1961, at 18.9 C (66.0 F), and the warmest was 1964, at 23.7 C (74.7 F). The strongest colour marks a difference of 3.0 C (5.4 F). 1961: 18.9 C, -2.9 C from the station mean1963: 22.7 C, +0.8 C from the station mean1964: 23.7 C, +1.8 C from the station mean1965: 21.8 C, -0.1 C from the station mean1966: 21.8 C, -0.1 C from the station mean1967: 21.6 C, -0.2 C from the station mean1969: 21.3 C, -0.5 C from the station mean1971: 20.2 C, -1.6 C from the station mean1972: 20.9 C, -0.9 C from the station mean1973: 20.7 C, -1.1 C from the station mean1974: 21.1 C, -0.7 C from the station mean1976: 20.9 C, -1.0 C from the station mean1977: 21.4 C, -0.4 C from the station mean1978: 21.5 C, -0.3 C from the station mean1979: 20.8 C, -1.0 C from the station mean1980: 23.1 C, +1.3 C from the station mean1981: 23.2 C, +1.4 C from the station mean1982: 21.4 C, -0.4 C from the station mean1983: 21.3 C, -0.5 C from the station mean1984: 21.7 C, -0.2 C from the station mean1985: 21.9 C, 0.0 C from the station mean1986: 22.6 C, +0.7 C from the station mean1987: 22.2 C, +0.3 C from the station mean1988: 22.5 C, +0.6 C from the station mean1992: 22.3 C, +0.5 C from the station mean1994: 22.7 C, +0.8 C from the station mean2003: 23.3 C, +1.5 C from the station mean2011: 22.9 C, +1.0 C from the station mean2012: 23.4 C, +1.5 C from the station mean19611965197019751980198519901995200020052010
One stripe for each of 29 complete years at Altar (Obs), 1961 to 2012. Blue stripes are years cooler than the station's own mean of 21.9 C (71.3 F); red stripes are warmer. The coolest year was 1961, at 18.9 C (66.0 F), and the warmest was 1964, at 23.7 C (74.7 F). The strongest colour marks a difference of 3.0 C (5.4 F).
Annual mean temperature at Altar (Obs) as warming stripes, 1961 to 2012
YearAnnual mean temperatureDifference from the station mean
196118.9 C-2.95 C
196322.7 C+0.80 C
196423.7 C+1.84 C
196521.8 C-0.09 C
196621.8 C-0.10 C
196721.6 C-0.24 C
196921.3 C-0.52 C
197120.2 C-1.62 C
197220.9 C-0.93 C
197320.7 C-1.12 C
197421.1 C-0.72 C
197620.9 C-0.96 C
197721.4 C-0.45 C
197821.5 C-0.34 C
197920.8 C-1.04 C
198023.1 C+1.28 C
198123.2 C+1.38 C
198221.4 C-0.44 C
198321.3 C-0.55 C
198421.7 C-0.17 C
198521.9 C+0.01 C
198622.6 C+0.71 C
198722.2 C+0.29 C
198822.5 C+0.59 C
199222.3 C+0.48 C
199422.7 C+0.80 C
200323.3 C+1.47 C
201122.9 C+1.01 C
201223.4 C+1.54 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1949 to 2026
Yearly extremes at Altar (Obs): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)48.8 C (119.8 F)201645.6 C (114.1 F)67
Coldest night (TNn)-10.0 C (14.0 F)1962-2.2 C (28.0 F)66
Wettest day (Rx1day)112.3 mm (4.4 in)198344.0 mm (1.7 in)64
Wettest five days (Rx5day)265.8 mm (10.5 in)198356.4 mm (2.2 in)64
Longest dry spell (CDD)158 days199380 days64

Hottest day (TXx)

Hottest day (TXx) at Altar (Obs) by year The hottest day of the year at Altar (Obs), 1949 to 2026. The record is 48.8 C (119.8 F) in 2016, marked on the chart; the median year is 45.6 C (114.1 F). 354045501960198020002020Record: 48.8 C (119.8 F) in 2016
The hottest day of the year at Altar (Obs), 1949 to 2026. The record is 48.8 C (119.8 F) in 2016, marked on the chart; the median year is 45.6 C (114.1 F).
Hottest day (TXx) at Altar (Obs) by year
YearHottest day (TXx)
194944.4 C (111.9 F)
195046.1 C (115.0 F)
195145.6 C (114.1 F)
196145.0 C (113.0 F)
196246.7 C (116.1 F)
196345.6 C (114.1 F)
196446.1 C (115.0 F)
196546.1 C (115.0 F)
196645.0 C (113.0 F)
196743.3 C (109.9 F)
196944.4 C (111.9 F)
197045.0 C (113.0 F)
197145.0 C (113.0 F)
197245.0 C (113.0 F)
197344.4 C (111.9 F)
197445.6 C (114.1 F)
197542.2 C (108.0 F)
197645.0 C (113.0 F)
197745.0 C (113.0 F)
197846.1 C (115.0 F)
197945.6 C (114.1 F)
198047.8 C (118.0 F)
198146.7 C (116.1 F)
198245.0 C (113.0 F)
198345.6 C (114.1 F)
198446.1 C (115.0 F)
198546.1 C (115.0 F)
198644.4 C (111.9 F)
198746.7 C (116.1 F)
198844.4 C (111.9 F)
198947.8 C (118.0 F)
199046.4 C (115.5 F)
199143.3 C (109.9 F)
199245.6 C (114.1 F)
199345.0 C (113.0 F)
199446.7 C (116.1 F)
199536.0 C (96.8 F)
199645.6 C (114.1 F)
199745.6 C (114.1 F)
199847.8 C (118.0 F)
199945.0 C (113.0 F)
200045.0 C (113.0 F)
200145.0 C (113.0 F)
200245.6 C (114.1 F)
200346.7 C (116.1 F)
200444.4 C (111.9 F)
200547.8 C (118.0 F)
200645.0 C (113.0 F)
200745.0 C (113.0 F)
200845.0 C (113.0 F)
200945.6 C (114.1 F)
201045.6 C (114.1 F)
201147.8 C (118.0 F)
201245.6 C (114.1 F)
201345.6 C (114.1 F)
201446.5 C (115.7 F)
201545.2 C (113.4 F)
201648.8 C (119.8 F)
201746.2 C (115.2 F)
201846.0 C (114.8 F)
201946.8 C (116.2 F)
202044.8 C (112.6 F)
202145.2 C (113.4 F)
202245.7 C (114.3 F)
202344.0 C (111.2 F)
202444.0 C (111.2 F)
202548.5 C (119.3 F)
2026n/a

Coldest night (TNn)

Coldest night (TNn) at Altar (Obs) by year The coldest night of the year at Altar (Obs), 1949 to 2026. The record is -10.0 C (14.0 F) in 1962, marked on the chart; the median year is -2.2 C (28.0 F). -1001020301960198020002020Record: -10.0 C (14.0 F) in 1962
The coldest night of the year at Altar (Obs), 1949 to 2026. The record is -10.0 C (14.0 F) in 1962, marked on the chart; the median year is -2.2 C (28.0 F).
Coldest night (TNn) at Altar (Obs) by year
YearColdest night (TNn)
1949n/a
195017.8 C (64.0 F)
195121.1 C (70.0 F)
1961-5.0 C (23.0 F)
1962-10.0 C (14.0 F)
1963-5.0 C (23.0 F)
1964-5.0 C (23.0 F)
1965-2.8 C (27.0 F)
1966-1.7 C (28.9 F)
1967-5.0 C (23.0 F)
1969-3.3 C (26.1 F)
1970-0.6 C (30.9 F)
1971-9.4 C (15.1 F)
1972-5.0 C (23.0 F)
1973-5.0 C (23.0 F)
1974-8.3 C (17.1 F)
1975-3.9 C (25.0 F)
1976-5.0 C (23.0 F)
1977-1.1 C (30.0 F)
1978-4.4 C (24.1 F)
1979-4.4 C (24.1 F)
19801.7 C (35.1 F)
1981-3.3 C (26.1 F)
1982-2.2 C (28.0 F)
1983-3.3 C (26.1 F)
1984-1.1 C (30.0 F)
1985-4.4 C (24.1 F)
1986-1.1 C (30.0 F)
1987-4.4 C (24.1 F)
1988-3.3 C (26.1 F)
1989-2.2 C (28.0 F)
1990-6.4 C (20.5 F)
1991-3.9 C (25.0 F)
1992-1.7 C (28.9 F)
1993-3.3 C (26.1 F)
1994-2.8 C (27.0 F)
19950.0 C (32.0 F)
1996-1.7 C (28.9 F)
1997-2.2 C (28.0 F)
1998-4.4 C (24.1 F)
1999-1.7 C (28.9 F)
20000.0 C (32.0 F)
2001-3.3 C (26.1 F)
2002-6.1 C (21.0 F)
2003-4.4 C (24.1 F)
2004-3.9 C (25.0 F)
2005-0.6 C (30.9 F)
20060.0 C (32.0 F)
2007-7.2 C (19.0 F)
20080.0 C (32.0 F)
20091.1 C (34.0 F)
20100.0 C (32.0 F)
2011-5.0 C (23.0 F)
20121.7 C (35.1 F)
2013-4.4 C (24.1 F)
20143.0 C (37.4 F)
2015-0.4 C (31.3 F)
2016-0.6 C (30.9 F)
20170.2 C (32.4 F)
20180.2 C (32.4 F)
2019-0.4 C (31.3 F)
2020-1.3 C (29.7 F)
20212.0 C (35.6 F)
20220.0 C (32.0 F)
20233.0 C (37.4 F)
20240.0 C (32.0 F)
20251.0 C (33.8 F)
2026n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Altar (Obs) by year The wettest day of the year at Altar (Obs), 1949 to 2026. The record is 112.3 mm (4.4 in) in 1983, marked on the chart; the median year is 44.0 mm (1.7 in). 0501001501960198020002020Record: 112.3 mm (4.4 in) in 1983
The wettest day of the year at Altar (Obs), 1949 to 2026. The record is 112.3 mm (4.4 in) in 1983, marked on the chart; the median year is 44.0 mm (1.7 in).
Wettest day (Rx1day) at Altar (Obs) by year
YearWettest day (Rx1day)
1949n/a
1950n/a
1951n/a
196134.8 mm (1.4 in)
196238.9 mm (1.5 in)
196333.8 mm (1.3 in)
196454.9 mm (2.2 in)
196564.3 mm (2.5 in)
196652.3 mm (2.1 in)
196759.9 mm (2.4 in)
196938.4 mm (1.5 in)
197056.9 mm (2.2 in)
1971101.3 mm (4.0 in)
197267.8 mm (2.7 in)
197344.5 mm (1.8 in)
197439.4 mm (1.6 in)
197555.9 mm (2.2 in)
197642.9 mm (1.7 in)
197774.4 mm (2.9 in)
197848.8 mm (1.9 in)
197945.0 mm (1.8 in)
198047.5 mm (1.9 in)
198135.8 mm (1.4 in)
198271.1 mm (2.8 in)
1983112.3 mm (4.4 in)
198448.8 mm (1.9 in)
198536.6 mm (1.4 in)
198653.6 mm (2.1 in)
198758.2 mm (2.3 in)
198862.0 mm (2.4 in)
198943.2 mm (1.7 in)
199029.5 mm (1.2 in)
199130.5 mm (1.2 in)
199229.0 mm (1.1 in)
199351.1 mm (2.0 in)
199449.8 mm (2.0 in)
199534.8 mm (1.4 in)
199648.3 mm (1.9 in)
199731.8 mm (1.3 in)
199840.9 mm (1.6 in)
199985.3 mm (3.4 in)
200040.9 mm (1.6 in)
200128.2 mm (1.1 in)
200286.4 mm (3.4 in)
200361.5 mm (2.4 in)
200439.1 mm (1.5 in)
200526.7 mm (1.1 in)
200643.4 mm (1.7 in)
200762.0 mm (2.4 in)
200834.8 mm (1.4 in)
200946.0 mm (1.8 in)
201061.0 mm (2.4 in)
201139.4 mm (1.6 in)
201235.6 mm (1.4 in)
201335.8 mm (1.4 in)
201458.7 mm (2.3 in)
201556.1 mm (2.2 in)
201649.3 mm (1.9 in)
201725.4 mm (1.0 in)
201838.6 mm (1.5 in)
201948.0 mm (1.9 in)
202014.2 mm (0.6 in)
202137.3 mm (1.5 in)
202235.1 mm (1.4 in)
20235.1 mm (0.20 in)
202424.9 mm (1.0 in)
2025n/a
202614.0 mm (0.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Altar (Obs) by year The wettest five days of the year at Altar (Obs), 1949 to 2026. The record is 265.8 mm (10.5 in) in 1983, marked on the chart; the median year is 56.4 mm (2.2 in). 01002003001960198020002020Record: 265.8 mm (10.5 in) in 1983
The wettest five days of the year at Altar (Obs), 1949 to 2026. The record is 265.8 mm (10.5 in) in 1983, marked on the chart; the median year is 56.4 mm (2.2 in).
Wettest five days (Rx5day) at Altar (Obs) by year
YearWettest five days (Rx5day)
1949n/a
1950n/a
1951n/a
196147.5 mm (1.9 in)
196256.7 mm (2.2 in)
196366.6 mm (2.6 in)
196469.3 mm (2.7 in)
196584.1 mm (3.3 in)
196658.1 mm (2.3 in)
196791.4 mm (3.6 in)
196947.1 mm (1.9 in)
197088.3 mm (3.5 in)
1971151.3 mm (6.0 in)
1972118.9 mm (4.7 in)
197370.9 mm (2.8 in)
197449.6 mm (2.0 in)
197582.1 mm (3.2 in)
197654.3 mm (2.1 in)
1977117.6 mm (4.6 in)
197861.7 mm (2.4 in)
1979143.1 mm (5.6 in)
198047.5 mm (1.9 in)
198162.0 mm (2.4 in)
198280.8 mm (3.2 in)
1983265.8 mm (10.5 in)
198465.8 mm (2.6 in)
198536.6 mm (1.4 in)
198692.0 mm (3.6 in)
198765.7 mm (2.6 in)
198873.2 mm (2.9 in)
198962.5 mm (2.5 in)
199066.9 mm (2.6 in)
199151.3 mm (2.0 in)
199257.9 mm (2.3 in)
199372.4 mm (2.9 in)
199452.6 mm (2.1 in)
19957.9 mm (0.31 in)
199650.3 mm (2.0 in)
199741.0 mm (1.6 in)
199848.6 mm (1.9 in)
1999165.0 mm (6.5 in)
200051.1 mm (2.0 in)
200129.2 mm (1.1 in)
200292.0 mm (3.6 in)
200399.6 mm (3.9 in)
200446.5 mm (1.8 in)
200546.5 mm (1.8 in)
200695.3 mm (3.8 in)
200773.9 mm (2.9 in)
200842.7 mm (1.7 in)
200947.3 mm (1.9 in)
201080.3 mm (3.2 in)
201139.7 mm (1.6 in)
201241.3 mm (1.6 in)
201337.6 mm (1.5 in)
201460.7 mm (2.4 in)
201556.1 mm (2.2 in)
201649.3 mm (1.9 in)
201725.4 mm (1.0 in)
201838.6 mm (1.5 in)
201948.0 mm (1.9 in)
202017.5 mm (0.7 in)
202146.2 mm (1.8 in)
20220.0 mm (0.00 in)
20232.5 mm (0.10 in)
20245.1 mm (0.20 in)
2025n/a
202614.0 mm (0.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Altar (Obs) by year The longest dry spell of the year at Altar (Obs), 1949 to 2026. The record is 158 days in 1993, marked on the chart; the median year is 80 days. 0501001502001960198020002020Record: 158 days in 1993
The longest dry spell of the year at Altar (Obs), 1949 to 2026. The record is 158 days in 1993, marked on the chart; the median year is 80 days.
Longest dry spell (CDD) at Altar (Obs) by year
YearLongest dry spell (CDD)
1949n/a
1950n/a
1951n/a
1961142 days
196298 days
196337 days
1964110 days
196596 days
196660 days
196784 days
196962 days
1970113 days
197186 days
1972148 days
197391 days
1974116 days
197592 days
197655 days
197778 days
1978121 days
1979135 days
1980119 days
198157 days
1982113 days
198339 days
198491 days
198578 days
198675 days
198760 days
198868 days
198957 days
199020 days
199166 days
1992132 days
1993158 days
199492 days
19956 days
1996109 days
1997104 days
199893 days
199991 days
200050 days
200159 days
200277 days
2003122 days
200454 days
200593 days
200671 days
2007105 days
2008148 days
2009140 days
201082 days
201184 days
2012113 days
201382 days
20146 days
20156 days
201614 days
201746 days
201836 days
201932 days
202022 days
20217 days
202229 days
20235 days
20245 days
2025n/a
20266 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Altar (Obs) falls on 14 February and the median first autumn frost on 6 December, which leaves a median of 296 days between them.

Frost dates and growing season at Altar (Obs)
MeasureMedian, all yearsEarliest periodRecent period (1961 to 2011)Recent against earliestFitted trend
Last spring frost14 Februaryn/a14 Februaryn/an/a
First autumn frost6 Decembern/a6 Decembern/an/a
Growing days296 daysn/a296 daysn/an/a

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

42 years, 1961 to 2012

A day with at least 46.4 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 112.5 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Altar (Obs): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years46.4 mm (1.8 in)
5 years61.4 mm (2.4 in)
10 years72.3 mm (2.8 in)
25 years87.4 mm (3.4 in)
50 years99.5 mm (3.9 in)Longer than the 42 years of record
100 years112.5 mm (4.4 in)Longer than the 42 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, 42 years of values from 1961 to 2012.

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: 112.3 mm (4.4 in) in 1983; 101.3 mm (4.0 in) in 1971; 74.4 mm (2.9 in) in 1977.

Download the Data

  • Data for Altar (Obs) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Altar (Obs) 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).