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San Manuel Weather Records (USC00027530)

Record envelope, standing records and threshold days for San Manuel (USC00027530), Arizona, United States, with 72 years of record.

Key Facts for San Manuel

  • San Manuel (USC00027530) is a weather station in Arizona, United States at 32.60 latitude and -110.63 longitude, 1,042 m (3,420 ft) above sea level.
  • The station reports from 1954 to 2025, 72 years of record.
  • 1,464 records set at San Manuel still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • San Manuel set a daily record precipitation of 17.5 mm (0.7 in) on 12 September 2025.

About the Station

  • Location: Arizona, United States, 32.60 latitude, -110.63 longitude.
  • Elevation: 1,042 m (3,420 ft).
  • Period of record: 1954 to 2025, 72 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

18 days at or beyond a record
Daily record high and record low at San Manuel, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Manuel. The lines show the 2026 daily maximum and minimum. 18 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 San Manuel. The lines show the 2026 daily maximum and minimum. 18 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Manuel, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.8 C (82.0 F)-11.1 C (12.0 F)22.8 C (73.0 F)-2.8 C (27.0 F)
Feb30.0 C (86.0 F)-7.2 C (19.0 F)26.1 C (79.0 F)3.3 C (37.9 F)
Mar32.2 C (90.0 F)-6.7 C (19.9 F)31.1 C (88.0 F)2.2 C (36.0 F)
Apr36.1 C (97.0 F)-1.7 C (28.9 F)36.1 C (97.0 F)3.9 C (39.0 F)
May40.6 C (105.1 F)2.8 C (37.0 F)37.2 C (99.0 F)8.3 C (46.9 F)
Jun43.9 C (111.0 F)8.3 C (46.9 F)42.8 C (109.0 F)17.2 C (63.0 F)
Jul42.8 C (109.0 F)10.0 C (50.0 F)42.2 C (108.0 F)18.3 C (64.9 F)
Aug43.3 C (109.9 F)10.6 C (51.1 F)43.3 C (109.9 F)20.6 C (69.1 F)
Sep41.1 C (106.0 F)5.0 C (41.0 F)37.2 C (99.0 F)18.9 C (66.0 F)
Oct36.1 C (97.0 F)-3.9 C (25.0 F)n/an/a
Nov30.0 C (86.0 F)-8.9 C (16.0 F)n/an/a
Dec27.2 C (81.0 F)-9.4 C (15.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Manuel by the year they were set 1,464 records at San Manuel still stand. 2020 holds the most, with 69. 0204060801954: 261955: 501956: 441957: 521958: 521959: 621960: 321961: 431962: 561963: 281964: 341965: 551966: 341967: 341968: 251969: 321970: 401971: 611972: 371973: 321974: 351975: 371976: 271977: 311978: 211979: 91980: 12011: 282012: 282013: 232014: 162015: 192016: 312017: 432018: 292019: 192020: 692021: 322022: 242023: 472024: 382025: 28195419591964196919741979201420192024
1,464 records at San Manuel still stand. 2020 holds the most, with 69.
Standing records at San Manuel by the year they were set
Year setStanding records
195426
195550
195644
195752
195852
195962
196032
196143
196256
196328
196434
196555
196634
196734
196825
196932
197040
197161
197237
197332
197435
197537
197627
197731
197821
19799
19801
201128
201228
201323
201416
201519
201631
201743
201829
201919
202069
202132
202224
202347
202438
202528

All-Time Record Progression

2 new records
When San Manuel set new all-time records 2 all-time records were set at San Manuel between 29 July 2006 and 20 June 2017. Each dot is a new record. Record daily precipitationRecord high minimum temperature29 July 2006: Record daily precipitation 79.5 mm (3.1 in)20 June 2017: Record high minimum temperature 29.4 C (84.9 F)20102015
2 all-time records were set at San Manuel between 29 July 2006 and 20 June 2017. Each dot is a new record.
When San Manuel set new all-time records
DateKindDetail
2006-07-29Record daily precipitationRecord daily precipitation 79.5 mm (3.1 in)
2017-06-20Record high minimum temperatureRecord high minimum temperature 29.4 C (84.9 F)

Wettest Day of Each Month

Jul: 79.5 mm (3.1 in)
Record daily precipitation for each month at San Manuel The wettest day on record for each calendar month at San Manuel. The most was 79.5 mm (3.1 in) on 29 July 2006. 020406080 Jan: 49.3 mm (1.9 in), 22 January 2010 Jan Feb: 34.0 mm (1.3 in), 12 February 1968 Feb Mar: 40.1 mm (1.6 in), 12 March 1982 Mar Apr: 22.6 mm (0.9 in), 26 April 2015 Apr May: 41.1 mm (1.6 in), 1 May 1981 May Jun: 49.3 mm (1.9 in), 17 June 2000 Jun Jul: 79.5 mm (3.1 in), 29 July 2006 Jul Aug: 78.5 mm (3.1 in), 9 August 2022 Aug Sep: 57.4 mm (2.3 in), 11 September 1977 Sep Oct: 59.4 mm (2.3 in), 1 October 1983 Oct Nov: 44.2 mm (1.7 in), 11 November 1994 Nov Dec: 50.0 mm (2.0 in), 15 December 1967 Dec
The wettest day on record for each calendar month at San Manuel. The most was 79.5 mm (3.1 in) on 29 July 2006.
Record daily precipitation for each month at San Manuel
MonthRecord daily precipitation (mm)Date
Jan49.3 mm (1.9 in)22 January 2010
Feb34.0 mm (1.3 in)12 February 1968
Mar40.1 mm (1.6 in)12 March 1982
Apr22.6 mm (0.9 in)26 April 2015
May41.1 mm (1.6 in)1 May 1981
Jun49.3 mm (1.9 in)17 June 2000
Jul79.5 mm (3.1 in)29 July 2006
Aug78.5 mm (3.1 in)9 August 2022
Sep57.4 mm (2.3 in)11 September 1977
Oct59.4 mm (2.3 in)1 October 1983
Nov44.2 mm (1.7 in)11 November 1994
Dec50.0 mm (2.0 in)15 December 1967

Period of Record Coverage

1954 to 2025
Days with data per year at San Manuel 42 years of record at San Manuel, 1954 to 2025. 6 years have data for under 90 percent of days and are left out of rankings: 1954, 1978, 1979, 1980, 2011, 2025. 1954: 199 of 365 days1955: 365 of 365 days1956: 364 of 366 days1957: 364 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 364 of 366 days1961: 363 of 365 days1962: 364 of 365 days1963: 364 of 365 days1964: 364 of 366 days1965: 360 of 365 days1966: 364 of 365 days1967: 364 of 365 days1968: 363 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 363 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 303 of 365 days1979: 60 of 365 days1980: 30 of 366 days2011: 295 of 365 days2012: 362 of 366 days2013: 358 of 365 days2014: 364 of 365 days2015: 362 of 365 days2016: 364 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: 266 of 365 days1960197019802020
42 years of record at San Manuel, 1954 to 2025. 6 years have data for under 90 percent of days and are left out of rankings: 1954, 1978, 1979, 1980, 2011, 2025.
Days with data per year at San Manuel
YearDays with dataShare of yearComplete
195419955%No
1955365100%Yes
195636499%Yes
1957364100%Yes
1958364100%Yes
1959365100%Yes
196036499%Yes
196136399%Yes
1962364100%Yes
1963364100%Yes
196436499%Yes
196536099%Yes
1966364100%Yes
1967364100%Yes
196836399%Yes
1969365100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
197336399%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
197830383%No
19796016%No
1980308%No
201129581%No
201236299%Yes
201335898%Yes
2014364100%Yes
201536299%Yes
201636499%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
202526673%No

Latest Records

20
Latest records at San Manuel
DateStationRecordValueBeat old record byOld record stoodSignificance
12 September 2025San Manuel, USdaily rain17.5 mm (0.7 in)5.8 mm (0.23 in)3 years14 of 100 (Routine)
3 September 2025San Manuel, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)46 years21 of 100 (Routine)
2 September 2025San Manuel, USdaily high min25.0 C (77.0 F)1.7 C (3.1 F)12 years15 of 100 (Routine)
24 August 2025San Manuel, USdaily high min26.7 C (80.1 F)0.6 C (1.1 F)4 years10 of 100 (Routine)
22 August 2025San Manuel, USdaily high max (Tie)38.3 C (100.9 F)tie52 years5 of 100 (Routine)
11 August 2025San Manuel, USdaily high min25.0 C (77.0 F)0.6 C (1.1 F)12 years12 of 100 (Routine)
9 August 2025San Manuel, USdaily high min27.8 C (82.0 F)3.4 C (6.1 F)48 years35 of 100 (Notable)
8 August 2025San Manuel, USdaily high min26.7 C (80.1 F)2.3 C (4.1 F)63 years34 of 100 (Routine)
7 August 2025San Manuel, USdaily high max42.2 C (108.0 F)3.3 C (5.9 F)64 years37 of 100 (Notable)
7 August 2025San Manuel, USmonthly high min (Tie)28.3 C (82.9 F)tie2 years4 of 100 (Routine)
6 August 2025San Manuel, USmonthly high max43.3 C (109.9 F)0.5 C (0.9 F)53 years33 of 100 (Routine)
5 August 2025San Manuel, USdaily high min26.1 C (79.0 F)0.5 C (0.9 F)7 years11 of 100 (Routine)
2 August 2025San Manuel, USdaily high max (Tie)39.4 C (102.9 F)tie56 years5 of 100 (Routine)
18 July 2025San Manuel, USdaily high min25.6 C (78.1 F)1.2 C (2.2 F)4 years12 of 100 (Routine)
10 July 2025San Manuel, USdaily high min27.8 C (82.0 F)0.6 C (1.1 F)4 years10 of 100 (Routine)
9 July 2025San Manuel, USdaily high max42.2 C (108.0 F)1.1 C (2.0 F)67 years30 of 100 (Routine)
9 July 2025San Manuel, USdaily high min (Tie)27.2 C (81.0 F)tie0 years1 of 100 (Routine)
2 July 2025San Manuel, USdaily high min (Tie)26.7 C (80.1 F)tie52 years5 of 100 (Routine)
19 June 2025San Manuel, USdaily high max (Tie)42.8 C (109.0 F)tie8 years2 of 100 (Routine)
16 June 2025San Manuel, USdaily high max (Tie)42.2 C (108.0 F)tie4 years2 of 100 (Routine)

Climate Trend

36 complete years, 1955 to 2024
Annual mean temperature at San Manuel as warming stripes, 1955 to 2024 One stripe for each of 36 complete years at San Manuel, 1955 to 2024. Blue stripes are years cooler than the station's own mean of 18.8 C (65.9 F); red stripes are warmer. The coolest year was 1964, at 17.5 C (63.4 F), and the warmest was 2017, at 20.5 C (68.9 F). The strongest colour marks a difference of 1.8 C (3.2 F). 1955: 18.6 C, -0.2 C from the station mean1956: 19.1 C, +0.3 C from the station mean1957: 18.4 C, -0.4 C from the station mean1958: 17.6 C, -1.2 C from the station mean1959: 17.7 C, -1.1 C from the station mean1960: 18.2 C, -0.6 C from the station mean1961: 17.5 C, -1.3 C from the station mean1962: 18.8 C, 0.0 C from the station mean1963: 18.6 C, -0.2 C from the station mean1964: 17.5 C, -1.4 C from the station mean1965: 18.1 C, -0.7 C from the station mean1966: 18.3 C, -0.5 C from the station mean1967: 18.4 C, -0.4 C from the station mean1968: 18.2 C, -0.6 C from the station mean1969: 18.6 C, -0.2 C from the station mean1970: 18.3 C, -0.5 C from the station mean1971: 18.0 C, -0.8 C from the station mean1972: 18.8 C, 0.0 C from the station mean1973: 18.2 C, -0.6 C from the station mean1974: 18.5 C, -0.3 C from the station mean1975: 17.8 C, -1.0 C from the station mean1976: 18.2 C, -0.7 C from the station mean1977: 18.8 C, 0.0 C from the station mean2012: 19.9 C, +1.1 C from the station mean2013: 19.3 C, +0.4 C from the station mean2014: 20.0 C, +1.2 C from the station mean2015: 19.2 C, +0.4 C from the station mean2016: 19.6 C, +0.7 C from the station mean2017: 20.5 C, +1.7 C from the station mean2018: 19.9 C, +1.1 C from the station mean2019: 18.9 C, +0.1 C from the station mean2020: 20.5 C, +1.6 C from the station mean2021: 20.0 C, +1.1 C from the station mean2022: 19.3 C, +0.5 C from the station mean2023: 20.0 C, +1.1 C from the station mean2024: 20.2 C, +1.3 C from the station mean19551960197019801990200020102020
One stripe for each of 36 complete years at San Manuel, 1955 to 2024. Blue stripes are years cooler than the station's own mean of 18.8 C (65.9 F); red stripes are warmer. The coolest year was 1964, at 17.5 C (63.4 F), and the warmest was 2017, at 20.5 C (68.9 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at San Manuel as warming stripes, 1955 to 2024
YearAnnual mean temperatureDifference from the station mean
195518.6 C-0.24 C
195619.1 C+0.32 C
195718.4 C-0.37 C
195817.6 C-1.18 C
195917.7 C-1.07 C
196018.2 C-0.62 C
196117.5 C-1.32 C
196218.8 C-0.01 C
196318.6 C-0.17 C
196417.5 C-1.36 C
196518.1 C-0.71 C
196618.3 C-0.51 C
196718.4 C-0.39 C
196818.2 C-0.64 C
196918.6 C-0.19 C
197018.3 C-0.51 C
197118.0 C-0.81 C
197218.8 C-0.05 C
197318.2 C-0.60 C
197418.5 C-0.29 C
197517.8 C-1.03 C
197618.2 C-0.66 C
197718.8 C-0.04 C
201219.9 C+1.05 C
201319.3 C+0.44 C
201420.0 C+1.16 C
201519.2 C+0.35 C
201619.6 C+0.74 C
201720.5 C+1.71 C
201819.9 C+1.05 C
201918.9 C+0.13 C
202020.5 C+1.64 C
202120.0 C+1.14 C
202219.3 C+0.47 C
202320.0 C+1.14 C
202420.2 C+1.34 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1955 to 2024. In Fahrenheit: 0.5 F (0.4 to 0.6) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Manuel
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.2 to 0.3) per decade0.5 F (0.4 to 0.6) per decade1955 to 202436Rise
Mean daily maximum0.07 C (0.01 to 0.14) per decade0.13 F (0.01 to 0.25) per decade1955 to 202436Rise
Mean daily minimum0.5 C (0.4 to 0.6) per decade0.9 F (0.7 to 1.0) per decade1955 to 202436Rise

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

1954 to 2025
Yearly extremes at San Manuel: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)197041.7 C (107.1 F)42
Coldest night (TNn)-11.1 C (12.0 F)1962-5.2 C (22.6 F)42
Wettest day (Rx1day)79.5 mm (3.1 in)200634.0 mm (1.3 in)72
Wettest five days (Rx5day)156.3 mm (6.2 in)198351.1 mm (2.0 in)72
Longest dry spell (CDD)153 days195968 days72

Hottest day (TXx)

Hottest day (TXx) at San Manuel by year The hottest day of the year at San Manuel, 1954 to 2025. The record is 43.9 C (111.0 F) in 1970, marked on the chart; the median year is 41.7 C (107.1 F). 384042441960198020002020Record: 43.9 C (111.0 F) in 1970
The hottest day of the year at San Manuel, 1954 to 2025. The record is 43.9 C (111.0 F) in 1970, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at San Manuel by year
YearHottest day (TXx)
195441.7 C (107.1 F)
195540.6 C (105.1 F)
195640.6 C (105.1 F)
195741.1 C (106.0 F)
195842.2 C (108.0 F)
195940.6 C (105.1 F)
196042.2 C (108.0 F)
196140.6 C (105.1 F)
196241.1 C (106.0 F)
196340.0 C (104.0 F)
196441.1 C (106.0 F)
196540.6 C (105.1 F)
196640.6 C (105.1 F)
196740.6 C (105.1 F)
196842.2 C (108.0 F)
196942.2 C (108.0 F)
197043.9 C (111.0 F)
197142.8 C (109.0 F)
197242.8 C (109.0 F)
197343.3 C (109.9 F)
197443.3 C (109.9 F)
197540.6 C (105.1 F)
197641.7 C (107.1 F)
197741.1 C (106.0 F)
197841.7 C (107.1 F)
197939.4 C (102.9 F)
198042.2 C (108.0 F)
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a
2004n/a
2005n/a
2006n/a
2007n/a
2008n/a
2009n/a
2010n/a
201142.2 C (108.0 F)
201241.1 C (106.0 F)
201341.7 C (107.1 F)
201440.0 C (104.0 F)
201540.6 C (105.1 F)
201642.8 C (109.0 F)
201743.9 C (111.0 F)
201840.6 C (105.1 F)
201940.6 C (105.1 F)
202042.2 C (108.0 F)
202142.8 C (109.0 F)
202241.1 C (106.0 F)
202342.2 C (108.0 F)
202442.2 C (108.0 F)
202543.3 C (109.9 F)

Coldest night (TNn)

Coldest night (TNn) at San Manuel by year The coldest night of the year at San Manuel, 1954 to 2025. The record is -11.1 C (12.0 F) in 1962, marked on the chart; the median year is -5.2 C (22.6 F). -20-10010201960198020002020Record: -11.1 C (12.0 F) in 1962
The coldest night of the year at San Manuel, 1954 to 2025. The record is -11.1 C (12.0 F) in 1962, marked on the chart; the median year is -5.2 C (22.6 F).
Coldest night (TNn) at San Manuel by year
YearColdest night (TNn)
1954-4.4 C (24.1 F)
1955-6.1 C (21.0 F)
1956-7.2 C (19.0 F)
1957-3.3 C (26.1 F)
1958-8.9 C (16.0 F)
1959-6.1 C (21.0 F)
1960-7.8 C (18.0 F)
1961-4.4 C (24.1 F)
1962-11.1 C (12.0 F)
1963-8.9 C (16.0 F)
1964-6.7 C (19.9 F)
1965-6.7 C (19.9 F)
1966-7.2 C (19.0 F)
1967-8.3 C (17.1 F)
1968-9.4 C (15.1 F)
1969-6.7 C (19.9 F)
1970-6.7 C (19.9 F)
1971-11.1 C (12.0 F)
1972-7.8 C (18.0 F)
1973-4.4 C (24.1 F)
1974-8.9 C (16.0 F)
1975-6.1 C (21.0 F)
1976-7.2 C (19.0 F)
1977-6.7 C (19.9 F)
1978-3.3 C (26.1 F)
1979-4.4 C (24.1 F)
198010.6 C (51.1 F)
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a
2004n/a
2005n/a
2006n/a
2007n/a
2008n/a
2009n/a
2010n/a
2011-3.9 C (25.0 F)
2012-2.2 C (28.0 F)
2013-6.1 C (21.0 F)
2014-2.8 C (27.0 F)
2015-3.9 C (25.0 F)
2016-3.9 C (25.0 F)
2017-3.3 C (26.1 F)
2018-3.3 C (26.1 F)
2019-4.4 C (24.1 F)
2020-3.3 C (26.1 F)
2021-1.1 C (30.0 F)
2022-3.3 C (26.1 F)
2023-3.9 C (25.0 F)
2024-3.9 C (25.0 F)
2025-2.8 C (27.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Manuel by year The wettest day of the year at San Manuel, 1954 to 2025. The record is 79.5 mm (3.1 in) in 2006, marked on the chart; the median year is 34.0 mm (1.3 in). 0204060801960198020002020Record: 79.5 mm (3.1 in) in 2006
The wettest day of the year at San Manuel, 1954 to 2025. The record is 79.5 mm (3.1 in) in 2006, marked on the chart; the median year is 34.0 mm (1.3 in).
Wettest day (Rx1day) at San Manuel by year
YearWettest day (Rx1day)
195448.3 mm (1.9 in)
195527.9 mm (1.1 in)
195626.9 mm (1.1 in)
195730.5 mm (1.2 in)
195836.8 mm (1.4 in)
195948.5 mm (1.9 in)
196021.6 mm (0.9 in)
196124.9 mm (1.0 in)
196241.9 mm (1.6 in)
196366.3 mm (2.6 in)
196434.5 mm (1.4 in)
196535.1 mm (1.4 in)
196635.1 mm (1.4 in)
196766.0 mm (2.6 in)
196834.0 mm (1.3 in)
196930.0 mm (1.2 in)
197036.1 mm (1.4 in)
197143.2 mm (1.7 in)
197222.9 mm (0.9 in)
197334.5 mm (1.4 in)
197439.6 mm (1.6 in)
197520.8 mm (0.8 in)
197624.4 mm (1.0 in)
197757.4 mm (2.3 in)
197846.0 mm (1.8 in)
197925.9 mm (1.0 in)
198024.1 mm (0.9 in)
198157.7 mm (2.3 in)
198241.1 mm (1.6 in)
198359.4 mm (2.3 in)
198431.2 mm (1.2 in)
198532.3 mm (1.3 in)
198631.2 mm (1.2 in)
198730.0 mm (1.2 in)
198827.7 mm (1.1 in)
198947.0 mm (1.9 in)
199049.3 mm (1.9 in)
199118.5 mm (0.7 in)
199233.8 mm (1.3 in)
199328.2 mm (1.1 in)
199451.6 mm (2.0 in)
199530.7 mm (1.2 in)
199629.0 mm (1.1 in)
199740.9 mm (1.6 in)
199834.5 mm (1.4 in)
199927.7 mm (1.1 in)
200049.3 mm (1.9 in)
200126.9 mm (1.1 in)
200227.2 mm (1.1 in)
200324.1 mm (0.9 in)
200424.1 mm (0.9 in)
200535.1 mm (1.4 in)
200679.5 mm (3.1 in)
200729.7 mm (1.2 in)
200837.6 mm (1.5 in)
200940.9 mm (1.6 in)
201049.3 mm (1.9 in)
201152.8 mm (2.1 in)
201228.2 mm (1.1 in)
201335.6 mm (1.4 in)
201430.5 mm (1.2 in)
201549.8 mm (2.0 in)
201637.8 mm (1.5 in)
201731.8 mm (1.3 in)
201834.0 mm (1.3 in)
201931.0 mm (1.2 in)
202016.0 mm (0.6 in)
202136.6 mm (1.4 in)
202278.5 mm (3.1 in)
202319.1 mm (0.8 in)
202432.5 mm (1.3 in)
202520.3 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Manuel by year The wettest five days of the year at San Manuel, 1954 to 2025. The record is 156.3 mm (6.2 in) in 1983, marked on the chart; the median year is 51.1 mm (2.0 in). 0501001502001960198020002020Record: 156.3 mm (6.2 in) in 1983
The wettest five days of the year at San Manuel, 1954 to 2025. The record is 156.3 mm (6.2 in) in 1983, marked on the chart; the median year is 51.1 mm (2.0 in).
Wettest five days (Rx5day) at San Manuel by year
YearWettest five days (Rx5day)
195482.0 mm (3.2 in)
195556.3 mm (2.2 in)
195635.8 mm (1.4 in)
195754.4 mm (2.1 in)
195840.1 mm (1.6 in)
195973.9 mm (2.9 in)
196030.8 mm (1.2 in)
196157.1 mm (2.2 in)
196246.7 mm (1.8 in)
1963127.8 mm (5.0 in)
196488.4 mm (3.5 in)
196571.4 mm (2.8 in)
196658.0 mm (2.3 in)
196795.5 mm (3.8 in)
196859.6 mm (2.3 in)
196946.0 mm (1.8 in)
197052.1 mm (2.1 in)
197178.3 mm (3.1 in)
197249.3 mm (1.9 in)
197356.3 mm (2.2 in)
197449.2 mm (1.9 in)
197537.6 mm (1.5 in)
197641.2 mm (1.6 in)
197758.2 mm (2.3 in)
197865.1 mm (2.6 in)
197945.6 mm (1.8 in)
198047.0 mm (1.9 in)
198183.1 mm (3.3 in)
198257.6 mm (2.3 in)
1983156.3 mm (6.2 in)
198436.0 mm (1.4 in)
198538.7 mm (1.5 in)
198643.4 mm (1.7 in)
198743.9 mm (1.7 in)
198833.8 mm (1.3 in)
198977.7 mm (3.1 in)
199059.0 mm (2.3 in)
199133.0 mm (1.3 in)
199253.9 mm (2.1 in)
199368.6 mm (2.7 in)
199453.1 mm (2.1 in)
199539.4 mm (1.6 in)
199654.3 mm (2.1 in)
199752.8 mm (2.1 in)
199850.0 mm (2.0 in)
199946.5 mm (1.8 in)
200069.9 mm (2.8 in)
200136.8 mm (1.4 in)
200238.4 mm (1.5 in)
200341.1 mm (1.6 in)
200431.5 mm (1.2 in)
200537.4 mm (1.5 in)
2006144.6 mm (5.7 in)
200737.6 mm (1.5 in)
200846.8 mm (1.8 in)
200960.0 mm (2.4 in)
201082.5 mm (3.2 in)
201153.1 mm (2.1 in)
201263.5 mm (2.5 in)
201344.4 mm (1.7 in)
201445.5 mm (1.8 in)
201554.4 mm (2.1 in)
201643.7 mm (1.7 in)
201741.8 mm (1.6 in)
201853.9 mm (2.1 in)
201938.1 mm (1.5 in)
202020.8 mm (0.8 in)
202157.7 mm (2.3 in)
202296.1 mm (3.8 in)
202332.5 mm (1.3 in)
202440.9 mm (1.6 in)
202530.7 mm (1.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Manuel by year The longest dry spell of the year at San Manuel, 1954 to 2025. The record is 153 days in 1959, marked on the chart; the median year is 68 days. 0501001502001960198020002020Record: 153 days in 1959
The longest dry spell of the year at San Manuel, 1954 to 2025. The record is 153 days in 1959, marked on the chart; the median year is 68 days.
Longest dry spell (CDD) at San Manuel by year
YearLongest dry spell (CDD)
195476 days
195583 days
195676 days
195747 days
195864 days
1959153 days
196064 days
196195 days
196296 days
196385 days
196494 days
196559 days
196685 days
196749 days
196892 days
196967 days
197072 days
197192 days
1972150 days
197369 days
197496 days
197574 days
197654 days
197764 days
197851 days
197953 days
198056 days
198138 days
198252 days
198376 days
198484 days
198575 days
198672 days
198755 days
198867 days
198949 days
199037 days
199176 days
199285 days
199357 days
199431 days
199569 days
199668 days
199743 days
199868 days
1999103 days
200065 days
200130 days
2002122 days
200344 days
200490 days
200546 days
200668 days
200750 days
200842 days
200939 days
201068 days
201150 days
201273 days
201366 days
201467 days
201537 days
201642 days
201787 days
201862 days
201953 days
2020101 days
202170 days
202280 days
202359 days
202474 days
202543 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

33 years with a frost

Across 33 years with a frost, the median last spring frost at San Manuel falls on 10 March and the median first autumn frost on 27 November, which leaves a median of 263 days between them.

Fitted over all years, the growing season changes by +10.2 days per decade at this station.

Frost dates and growing season at San Manuel
MeasureMedian, all yearsEarliest periodRecent period (1958 to 2022)Recent against earliestFitted trend
Last spring frost10 Marchn/a10 Marchn/a-6.7 days per decade
First autumn frost27 Novembern/a29 Novembern/a+3.4 days per decade
Growing days263 daysn/a266 daysn/a+10.2 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.

Rainfall Return Levels

66 years, 1955 to 2024

A day with at least 33.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 87.1 mm (3.4 in) of rain is expected about once in 100 years.

Rainfall return levels at San Manuel: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years33.8 mm (1.3 in)
5 years45.6 mm (1.8 in)
10 years54.3 mm (2.1 in)
25 years66.5 mm (2.6 in)
50 years76.4 mm (3.0 in)
100 years87.1 mm (3.4 in)Longer than the 66 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, 66 years of values from 1955 to 2024.

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: 79.5 mm (3.1 in) in 2006; 78.5 mm (3.1 in) in 2022; 66.3 mm (2.6 in) in 1963.

Climate Twins

1976 to 2024 against 1961 to 1990

Over 1976 to 2024, San Manuel had a mean temperature of 19.6 C (67.3 F) and 315.7 mm (12.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Bavispe (Smn) (Mexico, 287 km away), Colonia Morelos (Mexico, 239 km away) and Candelaria (United States, 627 km away).

Climate twins of San Manuel: stations whose 1961 to 1990 climate is closest to its 1976 to 2024 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Bavispe (Smn)Mexico287 km (178 mi)20.0 C (67.9 F)401.9 mm (15.8 in)0.80
Colonia MorelosMexico239 km (149 mi)18.8 C (65.8 F)331.7 mm (13.1 in)0.97
CandelariaUnited States627 km (390 mi)19.4 C (66.9 F)345.1 mm (13.6 in)0.99

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

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