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Santa Rosa Weather Records (MXN00012078)

Record envelope, standing records and threshold days for Santa Rosa (MXN00012078), Mexico, with 50 years of record.

Key Facts for Santa Rosa

  • Santa Rosa (MXN00012078) is a weather station in Mexico at 18.17 latitude and -101.63 longitude, 500 m (1,640 ft) above sea level.
  • The station reports from 1963 to 2012, 50 years of record.
  • 1,464 records set at Santa Rosa still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Santa Rosa tied a daily record high minimum temperature of 23.9 C (75.0 F) on 31 May 2012.

About the Station

  • Location: Mexico, 18.17 latitude, -101.63 longitude.
  • Elevation: 500 m (1,640 ft).
  • Period of record: 1963 to 2012, 50 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 Santa Rosa, with 2026 drawn through them The band shows the record high and record low for each calendar day at Santa Rosa. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Santa Rosa. 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 Santa Rosa, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.8 C (100.0 F)7.8 C (46.0 F)n/an/a
Feb37.8 C (100.0 F)8.3 C (46.9 F)n/an/a
Mar40.0 C (104.0 F)8.3 C (46.9 F)n/an/a
Apr40.6 C (105.1 F)8.9 C (48.0 F)n/an/a
May41.7 C (107.1 F)10.0 C (50.0 F)n/an/a
Jun40.6 C (105.1 F)10.6 C (51.1 F)n/an/a
Jul35.6 C (96.1 F)11.7 C (53.1 F)n/an/a
Aug38.9 C (102.0 F)12.8 C (55.0 F)n/an/a
Sep36.7 C (98.1 F)11.7 C (53.1 F)n/an/a
Oct36.7 C (98.1 F)8.9 C (48.0 F)n/an/a
Nov35.6 C (96.1 F)7.8 C (46.0 F)n/an/a
Dec38.9 C (102.0 F)7.8 C (46.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Santa Rosa by the year they were set 1,464 records at Santa Rosa still stand. 2010 holds the most, with 180. 0501001502001964: 71965: 221966: 361967: 311968: 261969: 651970: 71971: 211972: 291973: 961974: 351978: 121979: 281980: 291981: 271982: 21983: 301984: 211985: 721986: 71988: 101989: 11994: 341995: 481996: 91997: 271998: 141999: 22000: 242001: 312002: 572003: 342004: 372006: 682007: 372008: 562009: 552010: 1802011: 962012: 411964196819721979198319881996200020042009
1,464 records at Santa Rosa still stand. 2010 holds the most, with 180.
Standing records at Santa Rosa by the year they were set
Year setStanding records
19647
196522
196636
196731
196826
196965
19707
197121
197229
197396
197435
197812
197928
198029
198127
19822
198330
198421
198572
19867
198810
19891
199434
199548
19969
199727
199814
19992
200024
200131
200257
200334
200437
200668
200737
200856
200955
2010180
201196
201241

Wettest Day of Each Month

Oct: 205.0 mm (8.1 in)
Record daily precipitation for each month at Santa Rosa The wettest day on record for each calendar month at Santa Rosa. The most was 205.0 mm (8.1 in) on 7 October 1976. 0100200300 Jan: 199.9 mm (7.9 in), 13 January 2002 Jan Feb: 160.8 mm (6.3 in), 3 February 2010 Feb Mar: 37.8 mm (1.5 in), 2 March 2001 Mar Apr: 2.8 mm (0.11 in), 3 April 1966 Apr May: 95.0 mm (3.7 in), 26 May 1983 May Jun: 142.7 mm (5.6 in), 18 June 1974 Jun Jul: 132.8 mm (5.2 in), 18 July 1996 Jul Aug: 151.9 mm (6.0 in), 13 August 1996 Aug Sep: 110.0 mm (4.3 in), 23 September 2009 Sep Oct: 205.0 mm (8.1 in), 7 October 1976 Oct Nov: 69.9 mm (2.8 in), 3 November 1997 Nov Dec: 97.8 mm (3.9 in), 27 December 1974 Dec
The wettest day on record for each calendar month at Santa Rosa. The most was 205.0 mm (8.1 in) on 7 October 1976.
Record daily precipitation for each month at Santa Rosa
MonthRecord daily precipitation (mm)Date
Jan199.9 mm (7.9 in)13 January 2002
Feb160.8 mm (6.3 in)3 February 2010
Mar37.8 mm (1.5 in)2 March 2001
Apr2.8 mm (0.11 in)3 April 1966
May95.0 mm (3.7 in)26 May 1983
Jun142.7 mm (5.6 in)18 June 1974
Jul132.8 mm (5.2 in)18 July 1996
Aug151.9 mm (6.0 in)13 August 1996
Sep110.0 mm (4.3 in)23 September 2009
Oct205.0 mm (8.1 in)7 October 1976
Nov69.9 mm (2.8 in)3 November 1997
Dec97.8 mm (3.9 in)27 December 1974

Period of Record Coverage

1963 to 2012
Days with data per year at Santa Rosa 43 years of record at Santa Rosa, 1963 to 2012. 15 years have data for under 90 percent of days and are left out of rankings: 1963, 1970, 1975, 1982, 1984, 1986, 1987, 1989 and others. 1963: 18 of 365 days1964: 361 of 366 days1965: 364 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 362 of 365 days1970: 92 of 365 days1971: 337 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 31 of 365 days1978: 334 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 121 of 365 days1983: 334 of 365 days1984: 306 of 366 days1985: 365 of 365 days1986: 277 of 365 days1987: 254 of 365 days1988: 366 of 366 days1989: 23 of 365 days1994: 214 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 273 of 365 days1999: 275 of 365 days2000: 365 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2006: 334 of 365 days2007: 122 of 365 days2008: 330 of 366 days2009: 345 of 365 days2010: 283 of 365 days2011: 247 of 365 days2012: 110 of 366 days1970198020002010
43 years of record at Santa Rosa, 1963 to 2012. 15 years have data for under 90 percent of days and are left out of rankings: 1963, 1970, 1975, 1982, 1984, 1986, 1987, 1989 and others.
Days with data per year at Santa Rosa
YearDays with dataShare of yearComplete
1963185%No
196436199%Yes
1965364100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
196936299%Yes
19709225%No
197133792%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975318%No
197833492%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
198212133%No
198333492%Yes
198430684%No
1985365100%Yes
198627776%No
198725470%No
1988366100%Yes
1989236%No
199421459%No
1995365100%Yes
1996366100%Yes
1997365100%Yes
199827375%No
199927575%No
2000365100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
200633492%Yes
200712233%No
200833090%Yes
200934595%Yes
201028378%No
201124768%No
201211030%No

Latest Records

20
Latest records at Santa Rosa
DateStationRecordValueBeat old record byOld record stoodSignificance
31 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie28 years3 of 100 (Routine)
30 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie32 years3 of 100 (Routine)
29 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)1.1 C (2.0 F)32 years17 of 100 (Routine)
28 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie1 year1 of 100 (Routine)
27 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)0.6 C (1.1 F)28 years15 of 100 (Routine)
26 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie28 years3 of 100 (Routine)
25 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie28 years3 of 100 (Routine)
24 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)1.1 C (2.0 F)33 years17 of 100 (Routine)
23 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)0.6 C (1.1 F)46 years20 of 100 (Routine)
22 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)1.1 C (2.0 F)46 years21 of 100 (Routine)
21 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)0.6 C (1.1 F)40 years19 of 100 (Routine)
20 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie40 years4 of 100 (Routine)
19 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)1.7 C (3.1 F)44 years24 of 100 (Routine)
18 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie29 years3 of 100 (Routine)
17 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie29 years3 of 100 (Routine)
16 May 2012Santa Rosa, MXdaily high min (Tie)23.9 C (75.0 F)tie39 years4 of 100 (Routine)
15 May 2012Santa Rosa, MXdaily high min23.9 C (75.0 F)0.6 C (1.1 F)39 years18 of 100 (Routine)
13 May 2012Santa Rosa, MXdaily high min (Tie)21.7 C (71.1 F)tie39 years4 of 100 (Routine)
12 May 2012Santa Rosa, MXdaily rain4.8 mm (0.19 in)2.5 mm (0.10 in)16 years10 of 100 (Routine)
5 May 2012Santa Rosa, MXdaily high min (Tie)21.7 C (71.1 F)tie44 years4 of 100 (Routine)

Climate Trend

21 complete years, 1964 to 2004
Annual mean temperature at Santa Rosa as warming stripes, 1964 to 2004 One stripe for each of 21 complete years at Santa Rosa, 1964 to 2004. Blue stripes are years cooler than the station's own mean of 24.8 C (76.6 F); red stripes are warmer. The coolest year was 2004, at 22.5 C (72.4 F), and the warmest was 1969, at 25.7 C (78.2 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1964: 24.8 C, 0.0 C from the station mean1965: 24.9 C, +0.1 C from the station mean1966: 25.1 C, +0.3 C from the station mean1967: 24.7 C, -0.1 C from the station mean1968: 24.8 C, 0.0 C from the station mean1969: 25.7 C, +0.9 C from the station mean1972: 25.4 C, +0.6 C from the station mean1973: 24.8 C, 0.0 C from the station mean1974: 24.7 C, -0.1 C from the station mean1979: 25.2 C, +0.4 C from the station mean1980: 25.5 C, +0.8 C from the station mean1981: 24.8 C, 0.0 C from the station mean1985: 24.4 C, -0.4 C from the station mean1988: 24.6 C, -0.2 C from the station mean1995: 25.5 C, +0.7 C from the station mean1996: 25.5 C, +0.7 C from the station mean1997: 23.8 C, -1.0 C from the station mean2000: 23.7 C, -1.1 C from the station mean2002: 25.4 C, +0.6 C from the station mean2003: 25.0 C, +0.2 C from the station mean2004: 22.5 C, -2.3 C from the station mean19641970197519801985199019952000
One stripe for each of 21 complete years at Santa Rosa, 1964 to 2004. Blue stripes are years cooler than the station's own mean of 24.8 C (76.6 F); red stripes are warmer. The coolest year was 2004, at 22.5 C (72.4 F), and the warmest was 1969, at 25.7 C (78.2 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Santa Rosa as warming stripes, 1964 to 2004
YearAnnual mean temperatureDifference from the station mean
196424.8 C-0.01 C
196524.9 C+0.13 C
196625.1 C+0.28 C
196724.7 C-0.12 C
196824.8 C+0.03 C
196925.7 C+0.88 C
197225.4 C+0.64 C
197324.8 C-0.01 C
197424.7 C-0.09 C
197925.2 C+0.40 C
198025.5 C+0.75 C
198124.8 C-0.03 C
198524.4 C-0.41 C
198824.6 C-0.23 C
199525.5 C+0.72 C
199625.5 C+0.72 C
199723.8 C-0.96 C
200023.7 C-1.14 C
200225.4 C+0.60 C
200325.0 C+0.16 C
200422.5 C-2.32 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

1963 to 2012
Yearly extremes at Santa Rosa: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.7 C (107.1 F)200336.7 C (98.1 F)43
Coldest night (TNn)7.8 C (46.0 F)199710.6 C (51.1 F)43
Wettest day (Rx1day)205.0 mm (8.1 in)197674.9 mm (2.9 in)49
Wettest five days (Rx5day)517.4 mm (20.4 in)1996152.9 mm (6.0 in)49
Longest dry spell (CDD)172 days1973121 days49

Hottest day (TXx)

Hottest day (TXx) at Santa Rosa by year The hottest day of the year at Santa Rosa, 1963 to 2012. The record is 41.7 C (107.1 F) in 2003, marked on the chart; the median year is 36.7 C (98.1 F). 3035404519701980199020002010Record: 41.7 C (107.1 F) in 2003
The hottest day of the year at Santa Rosa, 1963 to 2012. The record is 41.7 C (107.1 F) in 2003, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Santa Rosa by year
YearHottest day (TXx)
196333.3 C (91.9 F)
196438.9 C (102.0 F)
196537.8 C (100.0 F)
196637.8 C (100.0 F)
196736.7 C (98.1 F)
196837.8 C (100.0 F)
196941.1 C (106.0 F)
197037.8 C (100.0 F)
197140.6 C (105.1 F)
197238.9 C (102.0 F)
197335.0 C (95.0 F)
197437.8 C (100.0 F)
197531.1 C (88.0 F)
1976n/a
1977n/a
197836.7 C (98.1 F)
197936.7 C (98.1 F)
198037.2 C (99.0 F)
198136.7 C (98.1 F)
198235.0 C (95.0 F)
198337.2 C (99.0 F)
198436.7 C (98.1 F)
198536.7 C (98.1 F)
198635.6 C (96.1 F)
198733.3 C (91.9 F)
198833.3 C (91.9 F)
198931.7 C (89.1 F)
1990n/a
1991n/a
1992n/a
1993n/a
199438.9 C (102.0 F)
199533.9 C (93.0 F)
199635.6 C (96.1 F)
199736.7 C (98.1 F)
199835.6 C (96.1 F)
199933.9 C (93.0 F)
200037.8 C (100.0 F)
200140.0 C (104.0 F)
200240.6 C (105.1 F)
200341.7 C (107.1 F)
200433.9 C (93.0 F)
200640.6 C (105.1 F)
200735.0 C (95.0 F)
200838.9 C (102.0 F)
200936.7 C (98.1 F)
201035.0 C (95.0 F)
201135.0 C (95.0 F)
201235.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Santa Rosa by year The coldest night of the year at Santa Rosa, 1963 to 2012. The record is 7.8 C (46.0 F) in 1997, marked on the chart; the median year is 10.6 C (51.1 F). 7.51012.51517.519701980199020002010Record: 7.8 C (46.0 F) in 1997
The coldest night of the year at Santa Rosa, 1963 to 2012. The record is 7.8 C (46.0 F) in 1997, marked on the chart; the median year is 10.6 C (51.1 F).
Coldest night (TNn) at Santa Rosa by year
YearColdest night (TNn)
196312.2 C (54.0 F)
19649.4 C (48.9 F)
19658.3 C (46.9 F)
196610.0 C (50.0 F)
19678.3 C (46.9 F)
196810.0 C (50.0 F)
19698.9 C (48.0 F)
197010.6 C (51.1 F)
19718.9 C (48.0 F)
19729.4 C (48.9 F)
197310.0 C (50.0 F)
197413.9 C (57.0 F)
197515.6 C (60.1 F)
1976n/a
1977n/a
197813.9 C (57.0 F)
197910.0 C (50.0 F)
198010.6 C (51.1 F)
198110.0 C (50.0 F)
198210.6 C (51.1 F)
198311.1 C (52.0 F)
198410.6 C (51.1 F)
198511.7 C (53.1 F)
198615.0 C (59.0 F)
198712.8 C (55.0 F)
198815.0 C (59.0 F)
198916.1 C (61.0 F)
1990n/a
1991n/a
1992n/a
1993n/a
199415.6 C (60.1 F)
199515.6 C (60.1 F)
199612.8 C (55.0 F)
19977.8 C (46.0 F)
199810.0 C (50.0 F)
199915.0 C (59.0 F)
200011.7 C (53.1 F)
200110.6 C (51.1 F)
20028.9 C (48.0 F)
200312.8 C (55.0 F)
200410.6 C (51.1 F)
20068.9 C (48.0 F)
20077.8 C (46.0 F)
20088.9 C (48.0 F)
20097.8 C (46.0 F)
20108.9 C (48.0 F)
20117.8 C (46.0 F)
201211.7 C (53.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Santa Rosa by year The wettest day of the year at Santa Rosa, 1963 to 2012. The record is 205.0 mm (8.1 in) in 1976, marked on the chart; the median year is 74.9 mm (2.9 in). 010020030019701980199020002010Record: 205.0 mm (8.1 in) in 1976
The wettest day of the year at Santa Rosa, 1963 to 2012. The record is 205.0 mm (8.1 in) in 1976, marked on the chart; the median year is 74.9 mm (2.9 in).
Wettest day (Rx1day) at Santa Rosa by year
YearWettest day (Rx1day)
19630.0 mm (0.00 in)
196459.9 mm (2.4 in)
196521.3 mm (0.8 in)
196621.8 mm (0.9 in)
196761.2 mm (2.4 in)
196821.6 mm (0.9 in)
196941.7 mm (1.6 in)
197016.8 mm (0.7 in)
197156.9 mm (2.2 in)
197262.0 mm (2.4 in)
197374.9 mm (2.9 in)
1974142.7 mm (5.6 in)
197562.0 mm (2.4 in)
1976205.0 mm (8.1 in)
1977127.8 mm (5.0 in)
197874.9 mm (2.9 in)
197990.2 mm (3.6 in)
198087.9 mm (3.5 in)
1981126.7 mm (5.0 in)
19820.0 mm (0.00 in)
198395.0 mm (3.7 in)
198479.8 mm (3.1 in)
198534.8 mm (1.4 in)
198634.8 mm (1.4 in)
198745.0 mm (1.8 in)
198874.9 mm (2.9 in)
198949.8 mm (2.0 in)
199039.9 mm (1.6 in)
199134.8 mm (1.4 in)
199239.9 mm (1.6 in)
199340.4 mm (1.6 in)
1994112.8 mm (4.4 in)
199553.3 mm (2.1 in)
1996151.9 mm (6.0 in)
1997140.0 mm (5.5 in)
1998129.8 mm (5.1 in)
1999143.8 mm (5.7 in)
2000120.4 mm (4.7 in)
200164.3 mm (2.5 in)
2002199.9 mm (7.9 in)
200390.9 mm (3.6 in)
200489.9 mm (3.5 in)
200684.8 mm (3.3 in)
200779.8 mm (3.1 in)
2008110.0 mm (4.3 in)
2009129.8 mm (5.1 in)
2010160.8 mm (6.3 in)
201179.8 mm (3.1 in)
201215.0 mm (0.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Santa Rosa by year The wettest five days of the year at Santa Rosa, 1963 to 2012. The record is 517.4 mm (20.4 in) in 1996, marked on the chart; the median year is 152.9 mm (6.0 in). 020040060019701980199020002010Record: 517.4 mm (20.4 in) in 1996
The wettest five days of the year at Santa Rosa, 1963 to 2012. The record is 517.4 mm (20.4 in) in 1996, marked on the chart; the median year is 152.9 mm (6.0 in).
Wettest five days (Rx5day) at Santa Rosa by year
YearWettest five days (Rx5day)
19630.0 mm (0.00 in)
1964116.6 mm (4.6 in)
196544.4 mm (1.7 in)
196666.6 mm (2.6 in)
1967100.8 mm (4.0 in)
196849.4 mm (1.9 in)
196998.8 mm (3.9 in)
197020.4 mm (0.8 in)
1971141.5 mm (5.6 in)
1972155.2 mm (6.1 in)
1973102.6 mm (4.0 in)
1974182.0 mm (7.2 in)
1975160.3 mm (6.3 in)
1976242.1 mm (9.5 in)
1977323.5 mm (12.7 in)
1978152.9 mm (6.0 in)
1979151.2 mm (6.0 in)
1980211.4 mm (8.3 in)
1981206.9 mm (8.1 in)
19820.0 mm (0.00 in)
1983163.4 mm (6.4 in)
1984153.1 mm (6.0 in)
198598.6 mm (3.9 in)
198651.8 mm (2.0 in)
198781.3 mm (3.2 in)
1988174.5 mm (6.9 in)
198989.4 mm (3.5 in)
199085.6 mm (3.4 in)
1991101.7 mm (4.0 in)
1992116.7 mm (4.6 in)
199361.0 mm (2.4 in)
1994193.3 mm (7.6 in)
1995151.9 mm (6.0 in)
1996517.4 mm (20.4 in)
1997278.5 mm (11.0 in)
1998332.4 mm (13.1 in)
1999337.7 mm (13.3 in)
2000276.2 mm (10.9 in)
2001140.3 mm (5.5 in)
2002304.5 mm (12.0 in)
2003170.7 mm (6.7 in)
2004259.4 mm (10.2 in)
2006141.0 mm (5.6 in)
2007159.5 mm (6.3 in)
2008196.9 mm (7.8 in)
2009294.4 mm (11.6 in)
2010271.1 mm (10.7 in)
2011238.1 mm (9.4 in)
201217.8 mm (0.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Santa Rosa by year The longest dry spell of the year at Santa Rosa, 1963 to 2012. The record is 172 days in 1973, marked on the chart; the median year is 121 days. 05010015020019701980199020002010Record: 172 days in 1973
The longest dry spell of the year at Santa Rosa, 1963 to 2012. The record is 172 days in 1973, marked on the chart; the median year is 121 days.
Longest dry spell (CDD) at Santa Rosa by year
YearLongest dry spell (CDD)
196319 days
1964146 days
196574 days
196688 days
1967140 days
196863 days
1969166 days
197059 days
1971145 days
1972146 days
1973172 days
1974151 days
197581 days
1976171 days
1977145 days
197864 days
197998 days
1980129 days
198155 days
198290 days
198371 days
198483 days
1985154 days
1986144 days
198790 days
1988101 days
1989130 days
1990125 days
1991166 days
199295 days
1993171 days
1994147 days
1995138 days
1996131 days
199775 days
1998144 days
199969 days
200082 days
200175 days
2002119 days
200371 days
2004107 days
2006145 days
200732 days
2008150 days
2009137 days
2010126 days
2011121 days
201290 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

37 years, 1964 to 2011

A day with at least 74.4 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 226.5 mm (8.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Santa Rosa: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years74.4 mm (2.9 in)
5 years115.5 mm (4.5 in)
10 years142.6 mm (5.6 in)
25 years176.6 mm (7.0 in)
50 years201.7 mm (7.9 in)Longer than the 37 years of record
100 years226.5 mm (8.9 in)Longer than the 37 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, 37 years of values from 1964 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: 205.0 mm (8.1 in) in 1976; 160.8 mm (6.3 in) in 2010; 151.9 mm (6.0 in) in 1996.

Download the Data

  • Data for Santa Rosa standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Santa Rosa 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).