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Helsinki Ilmala Weather Records (FIE00142101)

Record envelope, standing records and threshold days for Helsinki Ilmala (FIE00142101), Finland, with 68 years of record.

Key Facts for Helsinki Ilmala

  • Helsinki Ilmala (FIE00142101) is a weather station in Finland at 60.20 latitude and 24.92 longitude, 47 m (154 ft) above sea level.
  • The station reports from 1959 to 2026, 68 years of record.
  • 1,464 records set at Helsinki Ilmala still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Helsinki Ilmala set a daily record high minimum temperature of 16.0 C (60.8 F) on 31 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Finland, 60.20 latitude, 24.92 longitude.
  • Elevation: 47 m (154 ft).
  • Period of record: 1959 to 2026, 68 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

6 days at or beyond a record
Daily record high and record low at Helsinki Ilmala, with 2026 drawn through them The band shows the record high and record low for each calendar day at Helsinki Ilmala. The lines show the 2026 daily maximum and minimum. 6 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 Helsinki Ilmala. The lines show the 2026 daily maximum and minimum. 6 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Helsinki Ilmala, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan8.3 C (46.9 F)-31.6 C (-24.9 F)0.4 C (32.7 F)-18.5 C (-1.3 F)
Feb8.3 C (46.9 F)-32.7 C (-26.9 F)3.5 C (38.3 F)-20.1 C (-4.2 F)
Mar13.6 C (56.5 F)-23.0 C (-9.4 F)10.1 C (50.2 F)-1.9 C (28.6 F)
Apr19.9 C (67.8 F)-14.0 C (6.8 F)16.3 C (61.3 F)-1.8 C (28.8 F)
May27.5 C (81.5 F)-3.7 C (25.3 F)23.1 C (73.6 F)3.1 C (37.6 F)
Jun30.6 C (87.1 F)1.9 C (35.4 F)27.0 C (80.6 F)8.4 C (47.1 F)
Jul33.2 C (91.8 F)6.0 C (42.8 F)28.3 C (82.9 F)9.7 C (49.5 F)
Aug31.6 C (88.9 F)2.0 C (35.6 F)22.8 C (73.0 F)9.5 C (49.1 F)
Sep26.0 C (78.8 F)-3.3 C (26.1 F)20.0 C (68.0 F)5.3 C (41.5 F)
Oct17.8 C (64.0 F)-10.0 C (14.0 F)15.8 C (60.4 F)4.4 C (39.9 F)
Nov14.3 C (57.7 F)-18.8 C (-1.8 F)n/an/a
Dec10.5 C (50.9 F)-29.6 C (-21.3 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Helsinki Ilmala by the year they were set 1,464 records at Helsinki Ilmala still stand. 1968 holds the most, with 72. 0204060801959: 301960: 151961: 301962: 371963: 401964: 131965: 611966: 511967: 381968: 721969: 361970: 251971: 301972: 351973: 671974: 111975: 351976: 271977: 501978: 551979: 221980: 361981: 172008: 262009: 182010: 272011: 342012: 122013: 232014: 362015: 472016: 262017: 152018: 452019: 392020: 672021: 282022: 282023: 252024: 582025: 632026: 14195919641969197419792010201520202025
1,464 records at Helsinki Ilmala still stand. 1968 holds the most, with 72.
Standing records at Helsinki Ilmala by the year they were set
Year setStanding records
195930
196015
196130
196237
196340
196413
196561
196651
196738
196872
196936
197025
197130
197235
197367
197411
197535
197627
197750
197855
197922
198036
198117
200826
200918
201027
201134
201212
201323
201436
201547
201626
201715
201845
201939
202067
202128
202228
202325
202458
202563
202614

All-Time Record Progression

3 new records
When Helsinki Ilmala set new all-time records 3 all-time records were set at Helsinki Ilmala between 28 July 2018 and 28 July 2019. Each dot is a new record. Record high minimum temperatureRecord high maximum temperature28 July 2018: Record high minimum temperature 21.8 C (71.2 F)29 July 2018: Record high minimum temperature 22.8 C (73.0 F)28 July 2019: Record high maximum temperature 33.2 C (91.8 F)2020
3 all-time records were set at Helsinki Ilmala between 28 July 2018 and 28 July 2019. Each dot is a new record.
When Helsinki Ilmala set new all-time records
DateKindDetail
2018-07-28Record high minimum temperatureRecord high minimum temperature 21.8 C (71.2 F)
2018-07-29Record high minimum temperatureRecord high minimum temperature 22.8 C (73.0 F)
2019-07-28Record high maximum temperatureRecord high maximum temperature 33.2 C (91.8 F)

Wettest Day of Each Month

Jul: 88.4 mm (3.5 in)
Record daily precipitation for each month at Helsinki Ilmala The wettest day on record for each calendar month at Helsinki Ilmala. The most was 88.4 mm (3.5 in) on 25 July 1960. 0255075100 Jan: 21.0 mm (0.8 in), 1 January 1962 Jan Feb: 23.1 mm (0.9 in), 1 February 2018 Feb Mar: 19.1 mm (0.8 in), 30 March 2015 Mar Apr: 22.9 mm (0.9 in), 3 April 2024 Apr May: 36.1 mm (1.4 in), 26 May 2021 May Jun: 50.0 mm (2.0 in), 16 June 2016 Jun Jul: 88.4 mm (3.5 in), 25 July 1960 Jul Aug: 62.0 mm (2.4 in), 23 August 2019 Aug Sep: 56.6 mm (2.2 in), 12 September 1962 Sep Oct: 50.2 mm (2.0 in), 13 October 1963 Oct Nov: 25.9 mm (1.0 in), 13 November 2019 Nov Dec: 32.1 mm (1.3 in), 5 December 1967 Dec
The wettest day on record for each calendar month at Helsinki Ilmala. The most was 88.4 mm (3.5 in) on 25 July 1960.
Record daily precipitation for each month at Helsinki Ilmala
MonthRecord daily precipitation (mm)Date
Jan21.0 mm (0.8 in)1 January 1962
Feb23.1 mm (0.9 in)1 February 2018
Mar19.1 mm (0.8 in)30 March 2015
Apr22.9 mm (0.9 in)3 April 2024
May36.1 mm (1.4 in)26 May 2021
Jun50.0 mm (2.0 in)16 June 2016
Jul88.4 mm (3.5 in)25 July 1960
Aug62.0 mm (2.4 in)23 August 2019
Sep56.6 mm (2.2 in)12 September 1962
Oct50.2 mm (2.0 in)13 October 1963
Nov25.9 mm (1.0 in)13 November 2019
Dec32.1 mm (1.3 in)5 December 1967

Period of Record Coverage

1959 to 2026
Days with data per year at Helsinki Ilmala 42 years of record at Helsinki Ilmala, 1959 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1959, 1981, 2008, 2010, 2013, 2019, 2021, 2022 and others. 1959: 245 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 360 of 365 days1980: 365 of 366 days1981: 120 of 365 days2008: 322 of 366 days2009: 333 of 365 days2010: 325 of 365 days2011: 340 of 365 days2012: 330 of 366 days2013: 312 of 365 days2014: 340 of 365 days2015: 346 of 365 days2016: 331 of 366 days2017: 333 of 365 days2018: 330 of 365 days2019: 320 of 365 days2020: 336 of 366 days2021: 327 of 365 days2022: 323 of 365 days2023: 326 of 365 days2024: 322 of 366 days2025: 361 of 365 days2026: 274 of 365 days19601970198020102020
42 years of record at Helsinki Ilmala, 1959 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1959, 1981, 2008, 2010, 2013, 2019, 2021, 2022 and others.
Days with data per year at Helsinki Ilmala
YearDays with dataShare of yearComplete
195924567%No
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
197936099%Yes
1980365100%Yes
198112033%No
200832288%No
200933391%Yes
201032589%No
201134093%Yes
201233090%Yes
201331285%No
201434093%Yes
201534695%Yes
201633190%Yes
201733391%Yes
201833090%Yes
201932088%No
202033692%Yes
202132790%No
202232388%No
202332689%No
202432288%No
202536199%Yes
202627475%No

Latest Records

20
Latest records at Helsinki Ilmala
DateStationRecordValueBeat old record byOld record stoodSignificance
31 August 2026Helsinki Ilmala, FIdaily high min (Provisional)16.0 C (60.8 F)0.5 C (0.9 F)49 years21 of 100 (Routine)
18 July 2026Helsinki Ilmala, FIdaily high min (Tie)19.4 C (66.9 F)tie52 years5 of 100 (Routine)
17 April 2026Helsinki Ilmala, FIdaily high max16.3 C (61.3 F)1.2 C (2.2 F)15 years12 of 100 (Routine)
17 April 2026Helsinki Ilmala, FIdaily high min8.7 C (47.7 F)1.6 C (2.9 F)0 years11 of 100 (Routine)
14 April 2026Helsinki Ilmala, FIdaily high max12.5 C (54.5 F)0.2 C (0.4 F)16 years10 of 100 (Routine)
5 April 2026Helsinki Ilmala, FIdaily high min2.2 C (36.0 F)0.3 C (0.5 F)52 years21 of 100 (Routine)
4 April 2026Helsinki Ilmala, FIdaily high min2.4 C (36.3 F)0.3 C (0.5 F)16 years10 of 100 (Routine)
26 March 2026Helsinki Ilmala, FIdaily high min3.9 C (39.0 F)1.8 C (3.2 F)57 years26 of 100 (Routine)
25 March 2026Helsinki Ilmala, FIdaily high min (Tie)3.5 C (38.3 F)tie5 years1 of 100 (Routine)
22 March 2026Helsinki Ilmala, FIdaily high min2.3 C (36.1 F)0.4 C (0.7 F)12 years9 of 100 (Routine)
15 March 2026Helsinki Ilmala, FIdaily high max8.2 C (46.8 F)0.6 C (1.1 F)4 years8 of 100 (Routine)
14 March 2026Helsinki Ilmala, FIdaily high min4.2 C (39.6 F)2.5 C (4.5 F)12 years13 of 100 (Routine)
12 March 2026Helsinki Ilmala, FIdaily high min2.0 C (35.6 F)0.8 C (1.4 F)13 years11 of 100 (Routine)
7 March 2026Helsinki Ilmala, FIdaily high max8.0 C (46.4 F)0.8 C (1.4 F)59 years24 of 100 (Routine)
5 March 2026Helsinki Ilmala, FIdaily high max7.8 C (46.0 F)1.1 C (2.0 F)0 years8 of 100 (Routine)
4 March 2026Helsinki Ilmala, FIdaily high max5.9 C (42.6 F)0.3 C (0.5 F)0 years6 of 100 (Routine)
27 February 2026Helsinki Ilmala, FIdaily high min1.2 C (34.2 F)0.5 C (0.9 F)0 years6 of 100 (Routine)
20 December 2025Helsinki Ilmala, FIdaily high min5.9 C (42.6 F)3.2 C (5.8 F)10 years13 of 100 (Routine)
19 December 2025Helsinki Ilmala, FIdaily high min5.4 C (41.7 F)2.3 C (4.1 F)11 years12 of 100 (Routine)
18 December 2025Helsinki Ilmala, FIdaily high min3.0 C (37.4 F)0.1 C (0.2 F)14 years10 of 100 (Routine)

Climate Trend

25 complete years, 1960 to 2025
Annual mean temperature at Helsinki Ilmala as warming stripes, 1960 to 2025 One stripe for each of 25 complete years at Helsinki Ilmala, 1960 to 2025. Blue stripes are years cooler than the station's own mean of 5.3 C (41.6 F); red stripes are warmer. The coolest year was 1978, at 3.6 C (38.4 F), and the warmest was 2020, at 8.6 C (47.4 F). The strongest colour marks a difference of 3.3 C (5.9 F). 1960: 4.8 C, -0.5 C from the station mean1961: 6.4 C, +1.1 C from the station mean1962: 4.4 C, -1.0 C from the station mean1963: 4.5 C, -0.8 C from the station mean1964: 5.1 C, -0.2 C from the station mean1965: 4.5 C, -0.8 C from the station mean1966: 3.7 C, -1.6 C from the station mean1967: 5.0 C, -0.3 C from the station mean1968: 4.2 C, -1.1 C from the station mean1969: 3.8 C, -1.5 C from the station mean1970: 4.1 C, -1.2 C from the station mean1971: 5.1 C, -0.2 C from the station mean1972: 5.9 C, +0.6 C from the station mean1973: 5.3 C, 0.0 C from the station mean1974: 6.4 C, +1.1 C from the station mean1975: 6.8 C, +1.5 C from the station mean1976: 4.0 C, -1.3 C from the station mean1977: 4.4 C, -0.9 C from the station mean1978: 3.6 C, -1.7 C from the station mean1979: 4.5 C, -0.8 C from the station mean1980: 4.5 C, -0.9 C from the station mean2014: 7.4 C, +2.1 C from the station mean2015: 7.8 C, +2.5 C from the station mean2020: 8.6 C, +3.2 C from the station mean2025: 8.1 C, +2.8 C from the station mean1960197019801990200020102020
One stripe for each of 25 complete years at Helsinki Ilmala, 1960 to 2025. Blue stripes are years cooler than the station's own mean of 5.3 C (41.6 F); red stripes are warmer. The coolest year was 1978, at 3.6 C (38.4 F), and the warmest was 2020, at 8.6 C (47.4 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Helsinki Ilmala as warming stripes, 1960 to 2025
YearAnnual mean temperatureDifference from the station mean
19604.8 C-0.53 C
19616.4 C+1.12 C
19624.4 C-0.96 C
19634.5 C-0.80 C
19645.1 C-0.25 C
19654.5 C-0.85 C
19663.7 C-1.57 C
19675.0 C-0.35 C
19684.2 C-1.13 C
19693.8 C-1.55 C
19704.1 C-1.19 C
19715.1 C-0.23 C
19725.9 C+0.63 C
19735.3 C+0.03 C
19746.4 C+1.13 C
19756.8 C+1.52 C
19764.0 C-1.29 C
19774.4 C-0.90 C
19783.6 C-1.74 C
19794.5 C-0.80 C
19804.5 C-0.86 C
20147.4 C+2.06 C
20157.8 C+2.46 C
20208.6 C+3.24 C
20258.1 C+2.75 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

1959 to 2026
Yearly extremes at Helsinki Ilmala: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)33.2 C (91.8 F)201928.1 C (82.5 F)42
Coldest night (TNn)-32.7 C (-26.9 F)1966-22.5 C (-8.6 F)42
Wettest day (Rx1day)88.4 mm (3.5 in)196030.0 mm (1.2 in)41
Wettest five days (Rx5day)103.5 mm (4.1 in)196047.6 mm (1.9 in)34
Longest dry spell (CDD)38 days197218 days41

Hottest day (TXx)

Hottest day (TXx) at Helsinki Ilmala by year The hottest day of the year at Helsinki Ilmala, 1959 to 2026. The record is 33.2 C (91.8 F) in 2019, marked on the chart; the median year is 28.1 C (82.5 F). 102030401960198020002020Record: 33.2 C (91.8 F) in 2019
The hottest day of the year at Helsinki Ilmala, 1959 to 2026. The record is 33.2 C (91.8 F) in 2019, marked on the chart; the median year is 28.1 C (82.5 F).
Hottest day (TXx) at Helsinki Ilmala by year
YearHottest day (TXx)
195928.8 C (83.8 F)
196027.8 C (82.0 F)
196126.9 C (80.4 F)
196222.7 C (72.9 F)
196328.0 C (82.4 F)
196428.9 C (84.0 F)
196527.2 C (81.0 F)
196628.4 C (83.1 F)
196728.4 C (83.1 F)
196828.1 C (82.6 F)
196928.0 C (82.4 F)
197027.3 C (81.1 F)
197127.9 C (82.2 F)
197230.6 C (87.1 F)
197330.0 C (86.0 F)
197424.2 C (75.6 F)
197531.6 C (88.9 F)
197626.0 C (78.8 F)
197728.4 C (83.1 F)
197826.2 C (79.2 F)
197926.1 C (79.0 F)
198028.2 C (82.8 F)
198111.2 C (52.2 F)
200826.9 C (80.4 F)
200928.5 C (83.3 F)
201030.1 C (86.2 F)
201129.3 C (84.7 F)
201226.6 C (79.9 F)
201328.6 C (83.5 F)
201429.6 C (85.3 F)
201526.9 C (80.4 F)
201625.4 C (77.7 F)
201724.2 C (75.6 F)
201830.4 C (86.7 F)
201933.2 C (91.8 F)
202028.0 C (82.4 F)
202130.2 C (86.4 F)
202229.5 C (85.1 F)
202328.5 C (83.3 F)
202426.6 C (79.9 F)
202528.0 C (82.4 F)
202628.3 C (82.9 F)

Coldest night (TNn)

Coldest night (TNn) at Helsinki Ilmala by year The coldest night of the year at Helsinki Ilmala, 1959 to 2026. The record is -32.7 C (-26.9 F) in 1966, marked on the chart; the median year is -22.5 C (-8.6 F). -40-30-20-1001960198020002020Record: -32.7 C (-26.9 F) in 1966
The coldest night of the year at Helsinki Ilmala, 1959 to 2026. The record is -32.7 C (-26.9 F) in 1966, marked on the chart; the median year is -22.5 C (-8.6 F).
Coldest night (TNn) at Helsinki Ilmala by year
YearColdest night (TNn)
1959-20.9 C (-5.6 F)
1960-25.0 C (-13.0 F)
1961-22.5 C (-8.5 F)
1962-22.0 C (-7.6 F)
1963-23.0 C (-9.4 F)
1964-23.8 C (-10.8 F)
1965-23.9 C (-11.0 F)
1966-32.7 C (-26.9 F)
1967-27.1 C (-16.8 F)
1968-31.6 C (-24.9 F)
1969-27.8 C (-18.0 F)
1970-25.9 C (-14.6 F)
1971-20.1 C (-4.2 F)
1972-22.7 C (-8.9 F)
1973-25.5 C (-13.9 F)
1974-10.0 C (14.0 F)
1975-19.5 C (-3.1 F)
1976-23.4 C (-10.1 F)
1977-25.0 C (-13.0 F)
1978-29.6 C (-21.3 F)
1979-26.5 C (-15.7 F)
1980-25.6 C (-14.1 F)
1981-20.5 C (-4.9 F)
2008-10.8 C (12.6 F)
2009-18.3 C (-0.9 F)
2010-22.6 C (-8.7 F)
2011-23.9 C (-11.0 F)
2012-26.2 C (-15.2 F)
2013-22.6 C (-8.7 F)
2014-18.2 C (-0.8 F)
2015-14.0 C (6.8 F)
2016-23.9 C (-11.0 F)
2017-21.0 C (-5.8 F)
2018-19.7 C (-3.5 F)
2019-20.3 C (-4.5 F)
2020-8.2 C (17.2 F)
2021-21.2 C (-6.2 F)
2022-17.6 C (0.3 F)
2023-14.2 C (6.4 F)
2024-21.2 C (-6.2 F)
2025-13.9 C (7.0 F)
2026-20.1 C (-4.2 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Helsinki Ilmala by year The wettest day of the year at Helsinki Ilmala, 1959 to 2026. The record is 88.4 mm (3.5 in) in 1960, marked on the chart; the median year is 30.0 mm (1.2 in). 0204060801001960198020002020Record: 88.4 mm (3.5 in) in 1960
The wettest day of the year at Helsinki Ilmala, 1959 to 2026. The record is 88.4 mm (3.5 in) in 1960, marked on the chart; the median year is 30.0 mm (1.2 in).
Wettest day (Rx1day) at Helsinki Ilmala by year
YearWettest day (Rx1day)
195935.1 mm (1.4 in)
196088.4 mm (3.5 in)
196133.2 mm (1.3 in)
196256.6 mm (2.2 in)
196350.2 mm (2.0 in)
196420.1 mm (0.8 in)
196528.6 mm (1.1 in)
196627.0 mm (1.1 in)
196732.1 mm (1.3 in)
196822.0 mm (0.9 in)
196924.4 mm (1.0 in)
197033.7 mm (1.3 in)
197121.0 mm (0.8 in)
197246.0 mm (1.8 in)
197329.2 mm (1.1 in)
197426.5 mm (1.0 in)
197514.5 mm (0.6 in)
197642.6 mm (1.7 in)
197722.4 mm (0.9 in)
197840.0 mm (1.6 in)
197921.7 mm (0.9 in)
198023.5 mm (0.9 in)
19818.6 mm (0.34 in)
200819.1 mm (0.8 in)
200943.9 mm (1.7 in)
201030.0 mm (1.2 in)
201135.1 mm (1.4 in)
201227.9 mm (1.1 in)
201349.0 mm (1.9 in)
201418.0 mm (0.7 in)
201533.0 mm (1.3 in)
201650.0 mm (2.0 in)
201731.0 mm (1.2 in)
201823.9 mm (0.9 in)
201962.0 mm (2.4 in)
202034.0 mm (1.3 in)
202136.1 mm (1.4 in)
202222.1 mm (0.9 in)
202338.1 mm (1.5 in)
202422.9 mm (0.9 in)
2025n/a
202625.1 mm (1.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Helsinki Ilmala by year The wettest five days of the year at Helsinki Ilmala, 1959 to 2026. The record is 103.5 mm (4.1 in) in 1960, marked on the chart; the median year is 47.6 mm (1.9 in). 02550751001251960198020002020Record: 103.5 mm (4.1 in) in 1960
The wettest five days of the year at Helsinki Ilmala, 1959 to 2026. The record is 103.5 mm (4.1 in) in 1960, marked on the chart; the median year is 47.6 mm (1.9 in).
Wettest five days (Rx5day) at Helsinki Ilmala by year
YearWettest five days (Rx5day)
195963.1 mm (2.5 in)
1960103.5 mm (4.1 in)
196156.4 mm (2.2 in)
196271.9 mm (2.8 in)
196382.5 mm (3.2 in)
196442.8 mm (1.7 in)
196562.8 mm (2.5 in)
196639.0 mm (1.5 in)
196761.3 mm (2.4 in)
196849.0 mm (1.9 in)
196935.6 mm (1.4 in)
197063.4 mm (2.5 in)
197143.4 mm (1.7 in)
197282.5 mm (3.2 in)
197339.7 mm (1.6 in)
197472.2 mm (2.8 in)
197524.6 mm (1.0 in)
197656.6 mm (2.2 in)
197740.5 mm (1.6 in)
197855.7 mm (2.2 in)
197942.6 mm (1.7 in)
198046.2 mm (1.8 in)
198121.2 mm (0.8 in)
200828.2 mm (1.1 in)
2009n/a
2010n/a
2011n/a
2012n/a
2013n/a
2014n/a
201527.9 mm (1.1 in)
201635.6 mm (1.4 in)
201731.2 mm (1.2 in)
2018n/a
201949.3 mm (1.9 in)
202039.9 mm (1.6 in)
202165.3 mm (2.6 in)
202238.2 mm (1.5 in)
202349.6 mm (2.0 in)
202433.8 mm (1.3 in)
2025n/a
202653.4 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Helsinki Ilmala by year The longest dry spell of the year at Helsinki Ilmala, 1959 to 2026. The record is 38 days in 1972, marked on the chart; the median year is 18 days. 0102030401960198020002020Record: 38 days in 1972
The longest dry spell of the year at Helsinki Ilmala, 1959 to 2026. The record is 38 days in 1972, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Helsinki Ilmala by year
YearLongest dry spell (CDD)
195929 days
196032 days
196122 days
196214 days
196331 days
196428 days
196524 days
196619 days
196712 days
196820 days
196929 days
197020 days
197118 days
197238 days
197323 days
197425 days
197519 days
197625 days
197714 days
197823 days
197928 days
198026 days
198125 days
20081 day
20091 day
20101 day
20111 day
20121 day
20131 day
20142 days
20151 day
20162 days
20172 days
20181 day
20195 days
202020 days
202111 days
202216 days
202312 days
202415 days
2025n/a
202617 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

25 years with a frost

Across 25 years with a frost, the median last spring frost at Helsinki Ilmala falls on 5 May and the median first autumn frost on 10 October, which leaves a median of 153 days between them.

Fitted over all years, the growing season changes by +1.9 days per decade at this station.

Frost dates and growing season at Helsinki Ilmala
MeasureMedian, all yearsEarliest periodRecent period (1960 to 2025)Recent against earliestFitted trend
Last spring frost5 Mayn/a5 Mayn/a-1.3 days per decade
First autumn frost10 Octobern/a10 Octobern/a+0.6 days per decade
Growing days153 daysn/a153 daysn/a+1.9 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.

Download the Data

  • Data for Helsinki Ilmala standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Helsinki Ilmala 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-16).