Built 2026-10-15 (15 October 2026)

Alma Weather Records (CA008100200)

Record envelope, standing records and threshold days for Alma (CA008100200), New Brunswick, Canada, with 59 years of record.

Key Facts for Alma

  • Alma (CA008100200) is a weather station in New Brunswick, Canada at 45.60 latitude and -64.95 longitude, 43 m (141 ft) above sea level.
  • The station reports from 1950 to 2008, 59 years of record.
  • 1,464 records set at Alma still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Alma set a daily record precipitation of 23.0 mm (0.9 in) on 28 December 1983.

About the Station

  • Location: New Brunswick, Canada, 45.60 latitude, -64.95 longitude.
  • Elevation: 43 m (141 ft).
  • Period of record: 1950 to 2008, 59 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Alma, with 2026 drawn through them The band shows the record high and record low for each calendar day at Alma. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Alma. 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 Alma, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan13.9 C (57.0 F)-30.5 C (-22.9 F)n/an/a
Feb12.2 C (54.0 F)-30.6 C (-23.1 F)n/an/a
Mar16.0 C (60.8 F)-25.6 C (-14.1 F)n/an/a
Apr23.3 C (73.9 F)-13.3 C (8.1 F)n/an/a
May29.0 C (84.2 F)-5.0 C (23.0 F)n/an/a
Jun29.4 C (84.9 F)-0.6 C (30.9 F)n/an/a
Jul30.0 C (86.0 F)3.0 C (37.4 F)n/an/a
Aug32.0 C (89.6 F)2.2 C (36.0 F)n/an/a
Sep28.9 C (84.0 F)-1.1 C (30.0 F)n/an/a
Oct26.7 C (80.1 F)-9.0 C (15.8 F)n/an/a
Nov20.0 C (68.0 F)-15.0 C (5.0 F)n/an/a
Dec16.1 C (61.0 F)-28.5 C (-19.3 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Alma by the year they were set 1,464 records at Alma still stand. 1950 holds the most, with 72. 0204060801950: 721951: 451952: 301953: 541954: 431955: 261956: 321957: 421958: 241959: 401960: 411961: 321962: 441963: 321964: 371965: 371966: 391967: 521968: 421969: 331970: 381971: 431972: 631973: 361974: 541975: 331976: 591977: 481978: 461979: 681980: 341981: 521982: 571983: 36195019541958196219661970197419781982
1,464 records at Alma still stand. 1950 holds the most, with 72.
Standing records at Alma by the year they were set
Year setStanding records
195072
195145
195230
195354
195443
195526
195632
195742
195824
195940
196041
196132
196244
196332
196437
196537
196639
196752
196842
196933
197038
197143
197263
197336
197454
197533
197659
197748
197846
197968
198034
198152
198257
198336

All-Time Record Progression

1 new records
When Alma set new all-time records 1 all-time records were set at Alma between 30 July 1980 and 30 July 1980. Each dot is a new record. Record high minimum temperature30 July 1980: Record high minimum temperature 19.0 C (66.2 F)1980
1 all-time records were set at Alma between 30 July 1980 and 30 July 1980. Each dot is a new record.
When Alma set new all-time records
DateKindDetail
1980-07-30Record high minimum temperatureRecord high minimum temperature 19.0 C (66.2 F)

Wettest Day of Each Month

Apr: 179.1 mm (7.1 in)
Record daily precipitation for each month at Alma The wettest day on record for each calendar month at Alma. The most was 179.1 mm (7.1 in) on 1 April 1962. 050100150200 Jan: 112.4 mm (4.4 in), 8 January 1979 Jan Feb: 74.4 mm (2.9 in), 22 February 1974 Feb Mar: 64.0 mm (2.5 in), 4 March 1953 Mar Apr: 179.1 mm (7.1 in), 1 April 1962 Apr May: 61.2 mm (2.4 in), 8 May 1980 May Jun: 101.0 mm (4.0 in), 25 June 1981 Jun Jul: 110.7 mm (4.4 in), 12 July 1976 Jul Aug: 78.5 mm (3.1 in), 1 August 1951 Aug Sep: 110.7 mm (4.4 in), 12 September 1975 Sep Oct: 94.0 mm (3.7 in), 10 October 1967 Oct Nov: 118.1 mm (4.6 in), 22 November 1962 Nov Dec: 83.8 mm (3.3 in), 4 December 1967 Dec
The wettest day on record for each calendar month at Alma. The most was 179.1 mm (7.1 in) on 1 April 1962.
Record daily precipitation for each month at Alma
MonthRecord daily precipitation (mm)Date
Jan112.4 mm (4.4 in)8 January 1979
Feb74.4 mm (2.9 in)22 February 1974
Mar64.0 mm (2.5 in)4 March 1953
Apr179.1 mm (7.1 in)1 April 1962
May61.2 mm (2.4 in)8 May 1980
Jun101.0 mm (4.0 in)25 June 1981
Jul110.7 mm (4.4 in)12 July 1976
Aug78.5 mm (3.1 in)1 August 1951
Sep110.7 mm (4.4 in)12 September 1975
Oct94.0 mm (3.7 in)10 October 1967
Nov118.1 mm (4.6 in)22 November 1962
Dec83.8 mm (3.3 in)4 December 1967

Period of Record Coverage

1950 to 1983
Days with data per year at Alma 34 years of record at Alma, 1950 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1955, 1956, 1957, 1958. 1950: 333 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 288 of 365 days1956: 321 of 366 days1957: 300 of 365 days1958: 286 of 365 days1959: 337 of 365 days1960: 365 of 366 days1961: 365 of 365 days1962: 363 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 359 of 365 days1966: 362 of 365 days1967: 351 of 365 days1968: 361 of 366 days1969: 363 of 365 days1970: 357 of 365 days1971: 350 of 365 days1972: 337 of 366 days1973: 350 of 365 days1974: 357 of 365 days1975: 350 of 365 days1976: 360 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 360 of 365 days1982: 365 of 365 days1983: 364 of 365 days1950195519601965197019751980
34 years of record at Alma, 1950 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1955, 1956, 1957, 1958.
Days with data per year at Alma
YearDays with dataShare of yearComplete
195033391%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
195528879%No
195632188%No
195730082%No
195828678%No
195933792%Yes
1960365100%Yes
1961365100%Yes
196236399%Yes
1963365100%Yes
1964366100%Yes
196535998%Yes
196636299%Yes
196735196%Yes
196836199%Yes
196936399%Yes
197035798%Yes
197135096%Yes
197233792%Yes
197335096%Yes
197435798%Yes
197535096%Yes
197636098%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980365100%Yes
198136099%Yes
1982365100%Yes
1983364100%Yes

Latest Records

20
Latest records at Alma
DateStationRecordValueBeat old record byOld record stoodSignificance
28 December 1983Alma, CAdaily rain23.0 mm (0.9 in)2.9 mm (0.11 in)28 years13 of 100 (Routine)
25 December 1983Alma, CAdaily low max-15.5 C (4.1 F)3.8 C (6.8 F)14 years13 of 100 (Routine)
22 December 1983Alma, CAdaily snowfall17.0 cm (6.7 in)14.5 cm (5.7 in)16 years32 of 100 (Routine)
13 December 1983Alma, CAdaily rain39.0 mm (1.5 in)13.3 mm (0.5 in)24 years21 of 100 (Routine)
30 October 1983Alma, CAmonthly low min-9.0 C (15.8 F)1.2 C (2.2 F)9 years17 of 100 (Routine)
27 October 1983Alma, CAdaily low min-7.5 C (18.5 F)3.6 C (6.5 F)32 years20 of 100 (Routine)
26 October 1983Alma, CAdaily low min-5.5 C (22.1 F)0.5 C (0.9 F)26 years12 of 100 (Routine)
14 October 1983Alma, CAmonthly high min16.0 C (60.8 F)1.6 C (2.9 F)23 years23 of 100 (Routine)
13 October 1983Alma, CAdaily rain61.4 mm (2.4 in)39.3 mm (1.5 in)10 years33 of 100 (Routine)
3 October 1983Alma, CAdaily high min13.5 C (56.3 F)0.2 C (0.4 F)21 years9 of 100 (Routine)
3 October 1983Alma, CAdaily high max (Tie)20.0 C (68.0 F)tie32 years3 of 100 (Routine)
1 October 1983Alma, CAdaily high max20.0 C (68.0 F)0.6 C (1.1 F)29 years12 of 100 (Routine)
22 September 1983Alma, CAdaily high min15.0 C (59.0 F)1.1 C (2.0 F)8 years7 of 100 (Routine)
17 September 1983Alma, CAdaily rain25.0 mm (1.0 in)6.2 mm (0.24 in)13 years11 of 100 (Routine)
12 September 1983Alma, CAdaily high max23.0 C (73.4 F)0.8 C (1.4 F)21 years11 of 100 (Routine)
7 September 1983Alma, CAdaily high max26.5 C (79.7 F)3.5 C (6.3 F)2 years14 of 100 (Routine)
7 September 1983Alma, CAall-time high min (Tie)19.0 C (66.2 F)tie3 years5 of 100 (Routine)
6 September 1983Alma, CAdaily high max25.5 C (77.9 F)2.5 C (4.5 F)1 year10 of 100 (Routine)
5 September 1983Alma, CAdaily high max23.5 C (74.3 F)0.2 C (0.4 F)24 years10 of 100 (Routine)
31 August 1983Alma, CAdaily rain46.2 mm (1.8 in)16.0 mm (0.6 in)32 years24 of 100 (Routine)

Climate Trend

30 complete years, 1951 to 1983
Annual mean temperature at Alma as warming stripes, 1951 to 1983 One stripe for each of 30 complete years at Alma, 1951 to 1983. Blue stripes are years cooler than the station's own mean of 5.5 C (41.8 F); red stripes are warmer. The coolest year was 1972, at 4.2 C (39.5 F), and the warmest was 1953, at 6.9 C (44.4 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1951: 6.4 C, +1.0 C from the station mean1952: 6.3 C, +0.8 C from the station mean1953: 6.9 C, +1.4 C from the station mean1954: 6.0 C, +0.6 C from the station mean1956: 5.4 C, 0.0 C from the station mean1957: 5.9 C, +0.5 C from the station mean1959: 5.5 C, +0.1 C from the station mean1960: 6.1 C, +0.6 C from the station mean1961: 5.2 C, -0.3 C from the station mean1962: 4.5 C, -0.9 C from the station mean1963: 4.6 C, -0.8 C from the station mean1964: 4.9 C, -0.6 C from the station mean1965: 4.4 C, -1.1 C from the station mean1966: 6.0 C, +0.6 C from the station mean1968: 5.3 C, -0.2 C from the station mean1969: 6.1 C, +0.6 C from the station mean1970: 5.0 C, -0.5 C from the station mean1971: 5.1 C, -0.4 C from the station mean1972: 4.2 C, -1.3 C from the station mean1973: 5.6 C, +0.1 C from the station mean1974: 4.5 C, -1.0 C from the station mean1975: 5.1 C, -0.4 C from the station mean1976: 5.2 C, -0.3 C from the station mean1977: 5.7 C, +0.2 C from the station mean1978: 4.9 C, -0.6 C from the station mean1979: 6.2 C, +0.7 C from the station mean1980: 4.8 C, -0.6 C from the station mean1981: 6.5 C, +1.0 C from the station mean1982: 5.4 C, 0.0 C from the station mean1983: 6.5 C, +1.0 C from the station mean1951195519601965197019751980
One stripe for each of 30 complete years at Alma, 1951 to 1983. Blue stripes are years cooler than the station's own mean of 5.5 C (41.8 F); red stripes are warmer. The coolest year was 1972, at 4.2 C (39.5 F), and the warmest was 1953, at 6.9 C (44.4 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Alma as warming stripes, 1951 to 1983
YearAnnual mean temperatureDifference from the station mean
19516.4 C+0.97 C
19526.3 C+0.81 C
19536.9 C+1.43 C
19546.0 C+0.55 C
19565.4 C-0.03 C
19575.9 C+0.45 C
19595.5 C+0.06 C
19606.1 C+0.61 C
19615.2 C-0.32 C
19624.5 C-0.94 C
19634.6 C-0.83 C
19644.9 C-0.61 C
19654.4 C-1.06 C
19666.0 C+0.57 C
19685.3 C-0.22 C
19696.1 C+0.62 C
19705.0 C-0.52 C
19715.1 C-0.39 C
19724.2 C-1.30 C
19735.6 C+0.11 C
19744.5 C-1.01 C
19755.1 C-0.42 C
19765.2 C-0.27 C
19775.7 C+0.21 C
19784.9 C-0.58 C
19796.2 C+0.72 C
19804.8 C-0.65 C
19816.5 C+1.01 C
19825.4 C-0.05 C
19836.5 C+1.00 C

The fitted trend in annual mean temperature here over 1951 to 1983 is -0.2 C (-0.4 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.3 F (-0.8 to 0.2) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Alma
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.2 C (-0.4 to 0.1) per decade-0.3 F (-0.8 to 0.2) per decade1951 to 198330Not clearly different from zero
Mean daily maximum-0.23 C (-0.51 to 0.04) per decade-0.4 F (-0.9 to 0.1) per decade1951 to 198330Not clearly different from zero
Mean daily minimum-0.1 C (-0.4 to 0.2) per decade-0.2 F (-0.8 to 0.4) per decade1951 to 198330Not clearly different from zero

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

1950 to 1983
Yearly extremes at Alma: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)32.0 C (89.6 F)197827.7 C (81.8 F)34
Coldest night (TNn)-30.6 C (-23.1 F)1962-25.6 C (-14.1 F)34
Wettest day (Rx1day)179.1 mm (7.1 in)196273.8 mm (2.9 in)34
Wettest five days (Rx5day)228.6 mm (9.0 in)196297.6 mm (3.8 in)34
Longest dry spell (CDD)26 days198116 days34

Hottest day (TXx)

Hottest day (TXx) at Alma by year The hottest day of the year at Alma, 1950 to 1983. The record is 32.0 C (89.6 F) in 1978, marked on the chart; the median year is 27.7 C (81.8 F). 24262830321950196019701980Record: 32.0 C (89.6 F) in 1978
The hottest day of the year at Alma, 1950 to 1983. The record is 32.0 C (89.6 F) in 1978, marked on the chart; the median year is 27.7 C (81.8 F).
Hottest day (TXx) at Alma by year
YearHottest day (TXx)
195029.4 C (84.9 F)
195126.7 C (80.1 F)
195227.8 C (82.0 F)
195328.9 C (84.0 F)
195425.6 C (78.1 F)
195530.0 C (86.0 F)
195626.1 C (79.0 F)
195725.6 C (78.1 F)
195825.0 C (77.0 F)
195926.1 C (79.0 F)
196026.1 C (79.0 F)
196126.7 C (80.1 F)
196225.0 C (77.0 F)
196329.4 C (84.9 F)
196425.0 C (77.0 F)
196527.2 C (81.0 F)
196626.7 C (80.1 F)
196726.7 C (80.1 F)
196828.3 C (82.9 F)
196929.4 C (84.9 F)
197027.2 C (81.0 F)
197126.7 C (80.1 F)
197226.1 C (79.0 F)
197329.4 C (84.9 F)
197428.9 C (84.0 F)
197528.9 C (84.0 F)
197630.0 C (86.0 F)
197729.0 C (84.2 F)
197832.0 C (89.6 F)
197930.0 C (86.0 F)
198027.5 C (81.5 F)
198129.0 C (84.2 F)
198229.0 C (84.2 F)
198329.0 C (84.2 F)

Coldest night (TNn)

Coldest night (TNn) at Alma by year The coldest night of the year at Alma, 1950 to 1983. The record is -30.6 C (-23.1 F) in 1962, marked on the chart; the median year is -25.6 C (-14.1 F). -35-30-25-20-151950196019701980Record: -30.6 C (-23.1 F) in 1962
The coldest night of the year at Alma, 1950 to 1983. The record is -30.6 C (-23.1 F) in 1962, marked on the chart; the median year is -25.6 C (-14.1 F).
Coldest night (TNn) at Alma by year
YearColdest night (TNn)
1950-25.6 C (-14.1 F)
1951-28.9 C (-20.0 F)
1952-23.3 C (-9.9 F)
1953-19.4 C (-2.9 F)
1954-25.6 C (-14.1 F)
1955-27.8 C (-18.0 F)
1956-23.3 C (-9.9 F)
1957-28.9 C (-20.0 F)
1958-19.4 C (-2.9 F)
1959-25.0 C (-13.0 F)
1960-27.8 C (-18.0 F)
1961-23.9 C (-11.0 F)
1962-30.6 C (-23.1 F)
1963-23.3 C (-9.9 F)
1964-21.7 C (-7.1 F)
1965-27.8 C (-18.0 F)
1966-27.8 C (-18.0 F)
1967-27.8 C (-18.0 F)
1968-26.1 C (-15.0 F)
1969-20.6 C (-5.1 F)
1970-23.3 C (-9.9 F)
1971-27.2 C (-17.0 F)
1972-26.7 C (-16.1 F)
1973-25.0 C (-13.0 F)
1974-26.7 C (-16.1 F)
1975-25.6 C (-14.1 F)
1976-25.6 C (-14.1 F)
1977-22.8 C (-9.0 F)
1978-26.0 C (-14.8 F)
1979-24.5 C (-12.1 F)
1980-28.5 C (-19.3 F)
1981-27.0 C (-16.6 F)
1982-30.5 C (-22.9 F)
1983-23.0 C (-9.4 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Alma by year The wettest day of the year at Alma, 1950 to 1983. The record is 179.1 mm (7.1 in) in 1962, marked on the chart; the median year is 73.8 mm (2.9 in). 0501001502001950196019701980Record: 179.1 mm (7.1 in) in 1962
The wettest day of the year at Alma, 1950 to 1983. The record is 179.1 mm (7.1 in) in 1962, marked on the chart; the median year is 73.8 mm (2.9 in).
Wettest day (Rx1day) at Alma by year
YearWettest day (Rx1day)
195076.2 mm (3.0 in)
195178.5 mm (3.1 in)
195267.8 mm (2.7 in)
195364.0 mm (2.5 in)
195473.4 mm (2.9 in)
195531.8 mm (1.3 in)
195643.9 mm (1.7 in)
195763.5 mm (2.5 in)
195894.0 mm (3.7 in)
195978.7 mm (3.1 in)
196087.6 mm (3.4 in)
196161.7 mm (2.4 in)
1962179.1 mm (7.1 in)
196353.1 mm (2.1 in)
196461.5 mm (2.4 in)
196571.1 mm (2.8 in)
196669.1 mm (2.7 in)
196794.0 mm (3.7 in)
196873.2 mm (2.9 in)
196953.8 mm (2.1 in)
197069.3 mm (2.7 in)
197158.4 mm (2.3 in)
197288.4 mm (3.5 in)
197374.7 mm (2.9 in)
197474.4 mm (2.9 in)
1975110.7 mm (4.4 in)
1976110.7 mm (4.4 in)
197774.2 mm (2.9 in)
197892.2 mm (3.6 in)
1979112.4 mm (4.4 in)
198061.2 mm (2.4 in)
1981101.0 mm (4.0 in)
198278.2 mm (3.1 in)
198364.8 mm (2.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Alma by year The wettest five days of the year at Alma, 1950 to 1983. The record is 228.6 mm (9.0 in) in 1962, marked on the chart; the median year is 97.6 mm (3.8 in). 0501001502002501950196019701980Record: 228.6 mm (9.0 in) in 1962
The wettest five days of the year at Alma, 1950 to 1983. The record is 228.6 mm (9.0 in) in 1962, marked on the chart; the median year is 97.6 mm (3.8 in).
Wettest five days (Rx5day) at Alma by year
YearWettest five days (Rx5day)
1950129.1 mm (5.1 in)
195194.0 mm (3.7 in)
1952116.6 mm (4.6 in)
1953109.7 mm (4.3 in)
195477.7 mm (3.1 in)
195543.5 mm (1.7 in)
195685.8 mm (3.4 in)
195793.0 mm (3.7 in)
195899.1 mm (3.9 in)
1959113.3 mm (4.5 in)
1960104.1 mm (4.1 in)
196199.3 mm (3.9 in)
1962228.6 mm (9.0 in)
196391.7 mm (3.6 in)
196470.2 mm (2.8 in)
196572.4 mm (2.9 in)
196679.6 mm (3.1 in)
1967115.9 mm (4.6 in)
196895.0 mm (3.7 in)
196974.2 mm (2.9 in)
197096.0 mm (3.8 in)
197186.9 mm (3.4 in)
1972166.7 mm (6.6 in)
1973120.9 mm (4.8 in)
197486.8 mm (3.4 in)
1975114.3 mm (4.5 in)
1976131.8 mm (5.2 in)
1977136.2 mm (5.4 in)
1978121.5 mm (4.8 in)
1979157.4 mm (6.2 in)
198082.0 mm (3.2 in)
1981108.2 mm (4.3 in)
198286.2 mm (3.4 in)
198383.2 mm (3.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Alma by year The longest dry spell of the year at Alma, 1950 to 1983. The record is 26 days in 1981, marked on the chart; the median year is 16 days. 10152025301950196019701980Record: 26 days in 1981
The longest dry spell of the year at Alma, 1950 to 1983. The record is 26 days in 1981, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Alma by year
YearLongest dry spell (CDD)
195022 days
195113 days
195218 days
195314 days
195415 days
195518 days
195614 days
195715 days
195812 days
195916 days
196018 days
196120 days
196218 days
196315 days
196414 days
196514 days
196622 days
196716 days
196819 days
196913 days
197022 days
197115 days
197211 days
197314 days
197412 days
197520 days
197619 days
197712 days
197813 days
197911 days
198016 days
198126 days
198217 days
198316 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

30 years with a frost

Across 30 years with a frost, the median last spring frost at Alma falls on 18 May and the median first autumn frost on 12 October, which leaves a median of 148 days between them.

Fitted over all years, the growing season changes by +0.5 days per decade at this station.

Frost dates and growing season at Alma
MeasureMedian, all yearsEarliest periodRecent period (1951 to 1983)Recent against earliestFitted trend
Last spring frost18 Mayn/a18 Mayn/a+0.6 days per decade
First autumn frost12 Octobern/a12 Octobern/a+1.1 days per decade
Growing days148 daysn/a148 daysn/a+0.5 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

32 years, 1950 to 1983

A day with at least 72.6 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 173.6 mm (6.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Alma: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years72.6 mm (2.9 in)
5 years92.0 mm (3.6 in)
10 years107.4 mm (4.2 in)
25 years130.5 mm (5.1 in)
50 years150.7 mm (5.9 in)Longer than the 32 years of record
100 years173.6 mm (6.8 in)Longer than the 32 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, 32 years of values from 1950 to 1983.

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: 179.1 mm (7.1 in) in 1962; 112.4 mm (4.4 in) in 1979; 110.7 mm (4.4 in) in 1975.

Download the Data

  • Data for Alma standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Alma 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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