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Arroyo Frio Weather Records (MXN00012009)

Record envelope, standing records and threshold days for Arroyo Frio (MXN00012009), Mexico, with 48 years of record.

Key Facts for Arroyo Frio

  • Arroyo Frio (MXN00012009) is a weather station in Mexico at 17.40 latitude and -100.60 longitude, 290 m (951 ft) above sea level.
  • The station reports from 1965 to 2012, 48 years of record.
  • 1,464 records set at Arroyo Frio still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Arroyo Frio tied a daily record low maximum temperature of 23.3 C (73.9 F) on 23 November 2012.

About the Station

  • Location: Mexico, 17.40 latitude, -100.60 longitude.
  • Elevation: 290 m (951 ft).
  • Period of record: 1965 to 2012, 48 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Arroyo Frio, with 2026 drawn through them The band shows the record high and record low for each calendar day at Arroyo Frio. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Arroyo Frio. 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 Arroyo Frio, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan39.4 C (102.9 F)9.4 C (48.9 F)n/an/a
Feb39.4 C (102.9 F)8.3 C (46.9 F)n/an/a
Mar39.4 C (102.9 F)8.9 C (48.0 F)n/an/a
Apr39.4 C (102.9 F)7.8 C (46.0 F)n/an/a
May39.4 C (102.9 F)9.4 C (48.9 F)n/an/a
Jun39.4 C (102.9 F)10.0 C (50.0 F)n/an/a
Jul39.4 C (102.9 F)12.2 C (54.0 F)n/an/a
Aug39.4 C (102.9 F)13.3 C (55.9 F)n/an/a
Sep38.9 C (102.0 F)13.3 C (55.9 F)n/an/a
Oct39.4 C (102.9 F)14.4 C (57.9 F)n/an/a
Nov39.4 C (102.9 F)10.0 C (50.0 F)n/an/a
Dec39.4 C (102.9 F)8.3 C (46.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Arroyo Frio by the year they were set 1,464 records at Arroyo Frio still stand. 2010 holds the most, with 146. 0501001501965: 231966: 271967: 291968: 331969: 211970: 131971: 91972: 71973: 101974: 91975: 71976: 61977: 131978: 81979: 161980: 61981: 81982: 101983: 71984: 291985: 541986: 31987: 181988: 131989: 211990: 1251991: 821992: 741993: 431994: 471995: 961996: 991997: 241998: 361999: 202000: 232001: 52002: 62003: 42004: 112005: 42006: 82007: 62008: 62009: 1142010: 1462011: 262012: 591965197019751980198519901995200020052010
1,464 records at Arroyo Frio still stand. 2010 holds the most, with 146.
Standing records at Arroyo Frio by the year they were set
Year setStanding records
196523
196627
196729
196833
196921
197013
19719
19727
197310
19749
19757
19766
197713
19788
197916
19806
19818
198210
19837
198429
198554
19863
198718
198813
198921
1990125
199182
199274
199343
199447
199596
199699
199724
199836
199920
200023
20015
20026
20034
200411
20054
20068
20076
20086
2009114
2010146
201126
201259

Wettest Day of Each Month

Sep: 237.0 mm (9.3 in)
Record daily precipitation for each month at Arroyo Frio The wettest day on record for each calendar month at Arroyo Frio. The most was 237.0 mm (9.3 in) on 13 September 1984. 0100200300 Jan: 54.9 mm (2.2 in), 16 January 1981 Jan Feb: 23.9 mm (0.9 in), 12 February 1979 Feb Mar: 37.8 mm (1.5 in), 4 March 1988 Mar Apr: 30.0 mm (1.2 in), 24 April 2009 Apr May: 62.0 mm (2.4 in), 30 May 1978 May Jun: 122.9 mm (4.8 in), 30 June 1992 Jun Jul: 100.6 mm (4.0 in), 13 July 1979 Jul Aug: 145.3 mm (5.7 in), 24 August 1999 Aug Sep: 237.0 mm (9.3 in), 13 September 1984 Sep Oct: 90.9 mm (3.6 in), 7 October 1976 Oct Nov: 65.8 mm (2.6 in), 25 November 1996 Nov Dec: 34.8 mm (1.4 in), 26 December 2009 Dec
The wettest day on record for each calendar month at Arroyo Frio. The most was 237.0 mm (9.3 in) on 13 September 1984.
Record daily precipitation for each month at Arroyo Frio
MonthRecord daily precipitation (mm)Date
Jan54.9 mm (2.2 in)16 January 1981
Feb23.9 mm (0.9 in)12 February 1979
Mar37.8 mm (1.5 in)4 March 1988
Apr30.0 mm (1.2 in)24 April 2009
May62.0 mm (2.4 in)30 May 1978
Jun122.9 mm (4.8 in)30 June 1992
Jul100.6 mm (4.0 in)13 July 1979
Aug145.3 mm (5.7 in)24 August 1999
Sep237.0 mm (9.3 in)13 September 1984
Oct90.9 mm (3.6 in)7 October 1976
Nov65.8 mm (2.6 in)25 November 1996
Dec34.8 mm (1.4 in)26 December 2009

Period of Record Coverage

1965 to 2012
Days with data per year at Arroyo Frio 46 years of record at Arroyo Frio, 1965 to 2012. 9 years have data for under 90 percent of days and are left out of rankings: 1965, 1973, 1974, 1983, 1984, 1989, 2006, 2011 and others. 1965: 184 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 192 of 365 days1974: 304 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: 335 of 365 days1982: 361 of 365 days1983: 213 of 365 days1984: 249 of 366 days1985: 335 of 365 days1986: 334 of 365 days1987: 351 of 365 days1988: 366 of 366 days1989: 303 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: 363 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 334 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 361 of 365 days2003: 365 of 365 days2004: 365 of 366 days2005: 334 of 365 days2006: 31 of 365 days2009: 345 of 365 days2010: 361 of 365 days2011: 212 of 365 days2012: 305 of 366 days19701980199020002010
46 years of record at Arroyo Frio, 1965 to 2012. 9 years have data for under 90 percent of days and are left out of rankings: 1965, 1973, 1974, 1983, 1984, 1989, 2006, 2011 and others.
Days with data per year at Arroyo Frio
YearDays with dataShare of yearComplete
196518450%No
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
197319253%No
197430483%No
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
198133592%Yes
198236199%Yes
198321358%No
198424968%No
198533592%Yes
198633492%Yes
198735196%Yes
1988366100%Yes
198930383%No
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
199636399%Yes
1997365100%Yes
1998365100%Yes
199933492%Yes
2000366100%Yes
2001365100%Yes
200236199%Yes
2003365100%Yes
2004365100%Yes
200533492%Yes
2006318%No
200934595%Yes
201036199%Yes
201121258%No
201230583%No

Latest Records

20
Latest records at Arroyo Frio
DateStationRecordValueBeat old record byOld record stoodSignificance
23 November 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
14 November 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie15 years2 of 100 (Routine)
13 November 2012Arroyo Frio, MXdaily low max23.3 C (73.9 F)0.6 C (1.1 F)3 years6 of 100 (Routine)
10 November 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie2 years1 of 100 (Routine)
8 November 2012Arroyo Frio, MXdaily low max (Tie)24.4 C (75.9 F)tie3 years1 of 100 (Routine)
5 November 2012Arroyo Frio, MXdaily low max (Tie)24.4 C (75.9 F)tie2 years1 of 100 (Routine)
4 November 2012Arroyo Frio, MXdaily low max25.0 C (77.0 F)1.1 C (2.0 F)12 years10 of 100 (Routine)
3 November 2012Arroyo Frio, MXdaily low max23.9 C (75.0 F)0.5 C (0.9 F)2 years5 of 100 (Routine)
2 November 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
30 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie2 years1 of 100 (Routine)
28 October 2012Arroyo Frio, MXdaily low max23.3 C (73.9 F)1.1 C (2.0 F)3 years8 of 100 (Routine)
27 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
25 October 2012Arroyo Frio, MXdaily low max23.3 C (73.9 F)0.6 C (1.1 F)3 years6 of 100 (Routine)
24 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
23 October 2012Arroyo Frio, MXdaily low max (Tie)25.0 C (77.0 F)tie3 years1 of 100 (Routine)
22 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
21 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
20 October 2012Arroyo Frio, MXdaily low max (Tie)23.3 C (73.9 F)tie3 years1 of 100 (Routine)
18 October 2012Arroyo Frio, MXdaily low max23.3 C (73.9 F)1.1 C (2.0 F)3 years8 of 100 (Routine)
17 October 2012Arroyo Frio, MXdaily low max22.2 C (72.0 F)1.1 C (2.0 F)3 years8 of 100 (Routine)

Climate Trend

25 complete years, 1966 to 2010
Annual mean temperature at Arroyo Frio as warming stripes, 1966 to 2010 One stripe for each of 25 complete years at Arroyo Frio, 1966 to 2010. Blue stripes are years cooler than the station's own mean of 25.3 C (77.5 F); red stripes are warmer. The coolest year was 2010, at 21.6 C (71.0 F), and the warmest was 1990, at 27.3 C (81.1 F). The strongest colour marks a difference of 3.7 C (6.7 F). 1966: 25.2 C, -0.1 C from the station mean1967: 24.2 C, -1.1 C from the station mean1968: 24.9 C, -0.4 C from the station mean1969: 25.3 C, 0.0 C from the station mean1971: 24.9 C, -0.4 C from the station mean1972: 25.3 C, 0.0 C from the station mean1975: 25.0 C, -0.2 C from the station mean1976: 25.2 C, 0.0 C from the station mean1977: 25.5 C, +0.2 C from the station mean1978: 25.6 C, +0.3 C from the station mean1979: 25.7 C, +0.4 C from the station mean1980: 25.6 C, +0.3 C from the station mean1982: 25.8 C, +0.5 C from the station mean1988: 24.6 C, -0.7 C from the station mean1990: 27.3 C, +2.0 C from the station mean1991: 26.4 C, +1.1 C from the station mean1992: 26.7 C, +1.5 C from the station mean1993: 24.6 C, -0.6 C from the station mean1997: 24.6 C, -0.7 C from the station mean1998: 25.0 C, -0.3 C from the station mean2000: 26.1 C, +0.8 C from the station mean2001: 26.4 C, +1.1 C from the station mean2003: 25.0 C, -0.2 C from the station mean2004: 25.2 C, -0.1 C from the station mean2010: 21.6 C, -3.6 C from the station mean1966197019751980198519901995200020052010
One stripe for each of 25 complete years at Arroyo Frio, 1966 to 2010. Blue stripes are years cooler than the station's own mean of 25.3 C (77.5 F); red stripes are warmer. The coolest year was 2010, at 21.6 C (71.0 F), and the warmest was 1990, at 27.3 C (81.1 F). The strongest colour marks a difference of 3.7 C (6.7 F).
Annual mean temperature at Arroyo Frio as warming stripes, 1966 to 2010
YearAnnual mean temperatureDifference from the station mean
196625.2 C-0.08 C
196724.2 C-1.08 C
196824.9 C-0.40 C
196925.3 C+0.02 C
197124.9 C-0.36 C
197225.3 C+0.02 C
197525.0 C-0.23 C
197625.2 C-0.05 C
197725.5 C+0.24 C
197825.6 C+0.34 C
197925.7 C+0.40 C
198025.6 C+0.34 C
198225.8 C+0.50 C
198824.6 C-0.68 C
199027.3 C+2.02 C
199126.4 C+1.14 C
199226.7 C+1.47 C
199324.6 C-0.65 C
199724.6 C-0.68 C
199825.0 C-0.31 C
200026.1 C+0.80 C
200126.4 C+1.12 C
200325.0 C-0.23 C
200425.2 C-0.11 C
201021.6 C-3.63 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

1965 to 2012
Yearly extremes at Arroyo Frio: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)199036.7 C (98.1 F)46
Coldest night (TNn)7.8 C (46.0 F)199411.7 C (53.1 F)48
Wettest day (Rx1day)237.0 mm (9.3 in)198479.8 mm (3.1 in)48
Wettest five days (Rx5day)548.5 mm (21.6 in)1984153.9 mm (6.1 in)48
Longest dry spell (CDD)235 days2007112 days48

Hottest day (TXx)

Hottest day (TXx) at Arroyo Frio by year The hottest day of the year at Arroyo Frio, 1965 to 2012. The record is 39.4 C (102.9 F) in 1990, marked on the chart; the median year is 36.7 C (98.1 F). 2530354019701980199020002010Record: 39.4 C (102.9 F) in 1990
The hottest day of the year at Arroyo Frio, 1965 to 2012. The record is 39.4 C (102.9 F) in 1990, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Arroyo Frio by year
YearHottest day (TXx)
196536.7 C (98.1 F)
196637.2 C (99.0 F)
196735.6 C (96.1 F)
196838.9 C (102.0 F)
196937.8 C (100.0 F)
197036.7 C (98.1 F)
197136.7 C (98.1 F)
197236.7 C (98.1 F)
197337.8 C (100.0 F)
197435.6 C (96.1 F)
197535.6 C (96.1 F)
197637.8 C (100.0 F)
197737.8 C (100.0 F)
197836.7 C (98.1 F)
197937.8 C (100.0 F)
198036.7 C (98.1 F)
198136.7 C (98.1 F)
198236.7 C (98.1 F)
198336.7 C (98.1 F)
198435.6 C (96.1 F)
198536.1 C (97.0 F)
198636.7 C (98.1 F)
198735.0 C (95.0 F)
198835.0 C (95.0 F)
198938.3 C (100.9 F)
199039.4 C (102.9 F)
199139.4 C (102.9 F)
199239.4 C (102.9 F)
199339.4 C (102.9 F)
199435.0 C (95.0 F)
199539.4 C (102.9 F)
199639.4 C (102.9 F)
199736.1 C (97.0 F)
199838.9 C (102.0 F)
199937.2 C (99.0 F)
200037.8 C (100.0 F)
200138.3 C (100.9 F)
200235.0 C (95.0 F)
200335.0 C (95.0 F)
200438.3 C (100.9 F)
200532.2 C (90.0 F)
200631.7 C (89.1 F)
2007n/a
2008n/a
200928.3 C (82.9 F)
201029.4 C (84.9 F)
201127.2 C (81.0 F)
201227.2 C (81.0 F)

Coldest night (TNn)

Coldest night (TNn) at Arroyo Frio by year The coldest night of the year at Arroyo Frio, 1965 to 2012. The record is 7.8 C (46.0 F) in 1994, marked on the chart; the median year is 11.7 C (53.1 F). 7.51012.51517.519701980199020002010Record: 7.8 C (46.0 F) in 1994
The coldest night of the year at Arroyo Frio, 1965 to 2012. The record is 7.8 C (46.0 F) in 1994, marked on the chart; the median year is 11.7 C (53.1 F).
Coldest night (TNn) at Arroyo Frio by year
YearColdest night (TNn)
196511.7 C (53.1 F)
196610.0 C (50.0 F)
19678.9 C (48.0 F)
19688.9 C (48.0 F)
196911.7 C (53.1 F)
19708.9 C (48.0 F)
197110.0 C (50.0 F)
19729.4 C (48.9 F)
197315.0 C (59.0 F)
197413.9 C (57.0 F)
197510.6 C (51.1 F)
197610.0 C (50.0 F)
19778.9 C (48.0 F)
197810.6 C (51.1 F)
197910.0 C (50.0 F)
198010.0 C (50.0 F)
198111.7 C (53.1 F)
198211.7 C (53.1 F)
198310.0 C (50.0 F)
198413.9 C (57.0 F)
198515.0 C (59.0 F)
198611.7 C (53.1 F)
198716.1 C (61.0 F)
198815.0 C (59.0 F)
198915.0 C (59.0 F)
199015.0 C (59.0 F)
199113.3 C (55.9 F)
199213.3 C (55.9 F)
199313.3 C (55.9 F)
19947.8 C (46.0 F)
19958.3 C (46.9 F)
19969.4 C (48.9 F)
199710.0 C (50.0 F)
199811.1 C (52.0 F)
199915.0 C (59.0 F)
200015.0 C (59.0 F)
200110.6 C (51.1 F)
200215.0 C (59.0 F)
200311.1 C (52.0 F)
200416.7 C (62.1 F)
200517.2 C (63.0 F)
200615.0 C (59.0 F)
200717.2 C (63.0 F)
200817.2 C (63.0 F)
200917.2 C (63.0 F)
201016.1 C (61.0 F)
201117.2 C (63.0 F)
201217.2 C (63.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Arroyo Frio by year The wettest day of the year at Arroyo Frio, 1965 to 2012. The record is 237.0 mm (9.3 in) in 1984, marked on the chart; the median year is 79.8 mm (3.1 in). 010020030019701980199020002010Record: 237.0 mm (9.3 in) in 1984
The wettest day of the year at Arroyo Frio, 1965 to 2012. The record is 237.0 mm (9.3 in) in 1984, marked on the chart; the median year is 79.8 mm (3.1 in).
Wettest day (Rx1day) at Arroyo Frio by year
YearWettest day (Rx1day)
196542.9 mm (1.7 in)
196685.9 mm (3.4 in)
196775.9 mm (3.0 in)
196864.8 mm (2.6 in)
196975.9 mm (3.0 in)
197074.9 mm (2.9 in)
197187.9 mm (3.5 in)
197295.0 mm (3.7 in)
197395.3 mm (3.8 in)
197499.8 mm (3.9 in)
197585.9 mm (3.4 in)
197690.9 mm (3.6 in)
197757.9 mm (2.3 in)
197879.8 mm (3.1 in)
1979100.6 mm (4.0 in)
198079.8 mm (3.1 in)
198182.8 mm (3.3 in)
1982100.8 mm (4.0 in)
198395.0 mm (3.7 in)
1984237.0 mm (9.3 in)
198565.8 mm (2.6 in)
198648.8 mm (1.9 in)
198780.3 mm (3.2 in)
198880.3 mm (3.2 in)
198980.3 mm (3.2 in)
199059.9 mm (2.4 in)
199139.9 mm (1.6 in)
1992122.9 mm (4.8 in)
199379.8 mm (3.1 in)
199441.9 mm (1.6 in)
199559.9 mm (2.4 in)
199679.8 mm (3.1 in)
199760.5 mm (2.4 in)
1998119.9 mm (4.7 in)
1999145.3 mm (5.7 in)
2000119.9 mm (4.7 in)
200180.0 mm (3.1 in)
200279.8 mm (3.1 in)
200380.3 mm (3.2 in)
200490.2 mm (3.6 in)
200530.0 mm (1.2 in)
200639.9 mm (1.6 in)
20077.9 mm (0.31 in)
200859.9 mm (2.4 in)
200934.8 mm (1.4 in)
201049.8 mm (2.0 in)
201154.9 mm (2.2 in)
201234.8 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Arroyo Frio by year The wettest five days of the year at Arroyo Frio, 1965 to 2012. The record is 548.5 mm (21.6 in) in 1984, marked on the chart; the median year is 153.9 mm (6.1 in). 020040060019701980199020002010Record: 548.5 mm (21.6 in) in 1984
The wettest five days of the year at Arroyo Frio, 1965 to 2012. The record is 548.5 mm (21.6 in) in 1984, marked on the chart; the median year is 153.9 mm (6.1 in).
Wettest five days (Rx5day) at Arroyo Frio by year
YearWettest five days (Rx5day)
1965102.3 mm (4.0 in)
1966129.5 mm (5.1 in)
1967203.5 mm (8.0 in)
1968197.4 mm (7.8 in)
1969173.2 mm (6.8 in)
1970246.7 mm (9.7 in)
1971149.4 mm (5.9 in)
1972136.2 mm (5.4 in)
1973233.8 mm (9.2 in)
1974188.4 mm (7.4 in)
1975187.3 mm (7.4 in)
1976204.2 mm (8.0 in)
1977182.1 mm (7.2 in)
1978210.6 mm (8.3 in)
1979181.3 mm (7.1 in)
1980150.4 mm (5.9 in)
1981207.5 mm (8.2 in)
1982110.2 mm (4.3 in)
1983150.3 mm (5.9 in)
1984548.5 mm (21.6 in)
1985130.5 mm (5.1 in)
1986112.2 mm (4.4 in)
1987153.8 mm (6.1 in)
1988232.4 mm (9.1 in)
1989189.0 mm (7.4 in)
1990129.4 mm (5.1 in)
1991156.4 mm (6.2 in)
1992193.4 mm (7.6 in)
1993150.8 mm (5.9 in)
1994124.5 mm (4.9 in)
1995141.9 mm (5.6 in)
1996153.0 mm (6.0 in)
1997161.3 mm (6.4 in)
1998226.8 mm (8.9 in)
1999277.1 mm (10.9 in)
2000266.2 mm (10.5 in)
2001171.3 mm (6.7 in)
2002136.4 mm (5.4 in)
2003154.0 mm (6.1 in)
2004131.6 mm (5.2 in)
200567.1 mm (2.6 in)
200682.6 mm (3.3 in)
20077.9 mm (0.31 in)
2008189.2 mm (7.4 in)
2009129.6 mm (5.1 in)
2010134.7 mm (5.3 in)
2011119.7 mm (4.7 in)
201284.9 mm (3.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Arroyo Frio by year The longest dry spell of the year at Arroyo Frio, 1965 to 2012. The record is 235 days in 2007, marked on the chart; the median year is 112 days. 05010015020025019701980199020002010Record: 235 days in 2007
The longest dry spell of the year at Arroyo Frio, 1965 to 2012. The record is 235 days in 2007, marked on the chart; the median year is 112 days.
Longest dry spell (CDD) at Arroyo Frio by year
YearLongest dry spell (CDD)
196544 days
1966100 days
1967107 days
196871 days
1969156 days
1970109 days
197188 days
197272 days
1973130 days
1974137 days
197596 days
197691 days
1977140 days
197890 days
1979109 days
198075 days
198153 days
198267 days
198353 days
198443 days
198570 days
1986121 days
1987146 days
198895 days
1989125 days
1990131 days
1991152 days
199298 days
1993126 days
1994124 days
1995127 days
1996134 days
199758 days
1998115 days
1999132 days
2000139 days
2001155 days
200257 days
2003108 days
2004127 days
2005119 days
2006153 days
2007235 days
2008126 days
200969 days
2010158 days
201196 days
2012136 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

42 years, 1966 to 2011

A day with at least 75.9 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 130.2 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Arroyo Frio: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years75.9 mm (3.0 in)
5 years98.2 mm (3.9 in)
10 years109.1 mm (4.3 in)
25 years119.6 mm (4.7 in)
50 years125.5 mm (4.9 in)Longer than the 42 years of record
100 years130.2 mm (5.1 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 1966 to 2011.

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: 145.3 mm (5.7 in) in 1999; 122.9 mm (4.8 in) in 1992; 119.9 mm (4.7 in) in 1998.

Download the Data

  • Data for Arroyo Frio standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Arroyo Frio 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

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