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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Heiloo Weather Records (NLE00109122)

Record envelope, standing records and threshold days for Heiloo (NLE00109122), Netherlands, with 57 years of record.

Key Facts for Heiloo

  • Heiloo (NLE00109122) is a weather station in Netherlands at 52.60 latitude and 4.73 longitude, -1 m (-3 ft) above sea level.
  • The station reports from 1970 to 2026, 57 years of record.
  • 0 records set at Heiloo still stand.
  • Records are tracked for prcp, snwd: an element needs 30 years of data to be eligible.
  • Heiloo set a daily record precipitation of 16.9 mm (0.7 in) on 13 November 2025.

About the Station

  • Location: Netherlands, 52.60 latitude, 4.73 longitude.
  • Elevation: -1 m (-3 ft).
  • Period of record: 1970 to 2026, 57 years.
  • Eligible elements: prcp, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Heiloo, with 2026 drawn through them The band shows the record high and record low for each calendar day at Heiloo. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Heiloo. 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 Heiloo, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Heiloo by the year they were set 0 records at Heiloo still stand. 00000000000
0 records at Heiloo still stand.
Standing records at Heiloo by the year they were set
Year setStanding records

All-Time Record Progression

3 new records
When Heiloo set new all-time records 3 all-time records were set at Heiloo between 1 March 2005 and 3 March 2005. Each dot is a new record. Record snow depth1 March 2005: Record snow depth 10.0 cm (3.9 in)2 March 2005: Record snow depth 20.0 cm (7.9 in)3 March 2005: Record snow depth 25.0 cm (9.8 in)2005
3 all-time records were set at Heiloo between 1 March 2005 and 3 March 2005. Each dot is a new record.
When Heiloo set new all-time records
DateKindDetail
2005-03-01Record snow depthRecord snow depth 10.0 cm (3.9 in)
2005-03-02Record snow depthRecord snow depth 20.0 cm (7.9 in)
2005-03-03Record snow depthRecord snow depth 25.0 cm (9.8 in)

Wettest Day of Each Month

Oct: 74.0 mm (2.9 in)
Record daily precipitation for each month at Heiloo The wettest day on record for each calendar month at Heiloo. The most was 74.0 mm (2.9 in) on 27 October 1998. 020406080 Jan: 32.5 mm (1.3 in), 18 January 1998 Jan Feb: 41.3 mm (1.6 in), 16 February 2020 Feb Mar: 28.3 mm (1.1 in), 20 March 2008 Mar Apr: 37.0 mm (1.5 in), 23 April 2023 Apr May: 42.8 mm (1.7 in), 21 May 2024 May Jun: 63.5 mm (2.5 in), 18 June 2021 Jun Jul: 56.5 mm (2.2 in), 30 July 1989 Jul Aug: 62.0 mm (2.4 in), 23 August 1979 Aug Sep: 59.5 mm (2.3 in), 10 September 1983 Sep Oct: 74.0 mm (2.9 in), 27 October 1998 Oct Nov: 45.0 mm (1.8 in), 26 November 1983 Nov Dec: 58.0 mm (2.3 in), 18 December 1988 Dec
The wettest day on record for each calendar month at Heiloo. The most was 74.0 mm (2.9 in) on 27 October 1998.
Record daily precipitation for each month at Heiloo
MonthRecord daily precipitation (mm)Date
Jan32.5 mm (1.3 in)18 January 1998
Feb41.3 mm (1.6 in)16 February 2020
Mar28.3 mm (1.1 in)20 March 2008
Apr37.0 mm (1.5 in)23 April 2023
May42.8 mm (1.7 in)21 May 2024
Jun63.5 mm (2.5 in)18 June 2021
Jul56.5 mm (2.2 in)30 July 1989
Aug62.0 mm (2.4 in)23 August 1979
Sep59.5 mm (2.3 in)10 September 1983
Oct74.0 mm (2.9 in)27 October 1998
Nov45.0 mm (1.8 in)26 November 1983
Dec58.0 mm (2.3 in)18 December 1988

Latest Records

20
Latest records at Heiloo
DateStationRecordValueBeat old record byOld record stoodSignificance
13 November 2025Heiloo, NLdaily rain16.9 mm (0.7 in)1.4 mm (0.06 in)6 years8 of 100 (Routine)
15 July 2025Heiloo, NLdaily rain18.0 mm (0.7 in)3.0 mm (0.12 in)32 years18 of 100 (Routine)
5 December 2024Heiloo, NLdaily rain27.1 mm (1.1 in)13.7 mm (0.5 in)16 years34 of 100 (Routine)
30 September 2024Heiloo, NLdaily rain34.8 mm (1.4 in)16.7 mm (0.7 in)2 years28 of 100 (Routine)
27 September 2024Heiloo, NLdaily rain46.8 mm (1.8 in)27.2 mm (1.1 in)49 years56 of 100 (Notable)
26 September 2024Heiloo, NLdaily rain29.5 mm (1.2 in)1.7 mm (0.07 in)29 years15 of 100 (Routine)
10 July 2024Heiloo, NLdaily rain20.5 mm (0.8 in)1.3 mm (0.05 in)14 years11 of 100 (Routine)
5 July 2024Heiloo, NLdaily rain8.1 mm (0.32 in)0.1 mm (0.00 in)38 years16 of 100 (Routine)
10 June 2024Heiloo, NLdaily rain29.8 mm (1.2 in)8.9 mm (0.35 in)15 years22 of 100 (Routine)
24 May 2024Heiloo, NLdaily rain27.2 mm (1.1 in)17.8 mm (0.7 in)21 years45 of 100 (Notable)
21 May 2024Heiloo, NLmonthly rain42.8 mm (1.7 in)5.0 mm (0.20 in)44 years37 of 100 (Notable)
4 May 2024Heiloo, NLdaily rain15.0 mm (0.6 in)3.2 mm (0.13 in)38 years20 of 100 (Routine)
25 April 2024Heiloo, NLdaily rain14.0 mm (0.6 in)3.1 mm (0.12 in)8 years14 of 100 (Routine)
15 April 2024Heiloo, NLdaily rain28.8 mm (1.1 in)17.3 mm (0.7 in)26 years52 of 100 (Notable)
18 February 2024Heiloo, NLdaily rain21.0 mm (0.8 in)14.2 mm (0.6 in)9 years20 of 100 (Routine)
8 February 2024Heiloo, NLdaily rain23.1 mm (0.9 in)13.4 mm (0.5 in)49 years20 of 100 (Routine)
4 January 2024Heiloo, NLdaily rain10.0 mm (0.4 in)1.1 mm (0.04 in)14 years11 of 100 (Routine)
31 December 2023Heiloo, NLdaily rain15.5 mm (0.6 in)4.5 mm (0.18 in)0 years13 of 100 (Routine)
25 December 2023Heiloo, NLdaily rain14.2 mm (0.6 in)2.1 mm (0.08 in)24 years15 of 100 (Routine)
12 December 2023Heiloo, NLdaily rain17.0 mm (0.7 in)2.2 mm (0.09 in)29 years17 of 100 (Routine)

Extremes by Year

1970 to 2026
Yearly extremes at Heiloo: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)74.0 mm (2.9 in)199832.6 mm (1.3 in)57
Wettest five days (Rx5day)126.4 mm (5.0 in)202172.9 mm (2.9 in)56
Longest dry spell (CDD)366 days197220 days57

Wettest day (Rx1day)

Wettest day (Rx1day) at Heiloo by year The wettest day of the year at Heiloo, 1970 to 2026. The record is 74.0 mm (2.9 in) in 1998, marked on the chart; the median year is 32.6 mm (1.3 in). 020406080197019801990200020102020Record: 74.0 mm (2.9 in) in 1998
The wettest day of the year at Heiloo, 1970 to 2026. The record is 74.0 mm (2.9 in) in 1998, marked on the chart; the median year is 32.6 mm (1.3 in).
Wettest day (Rx1day) at Heiloo by year
YearWettest day (Rx1day)
19700.0 mm (0.00 in)
19710.0 mm (0.00 in)
19720.0 mm (0.00 in)
19730.1 mm (0.00 in)
197430.7 mm (1.2 in)
197540.1 mm (1.6 in)
197635.1 mm (1.4 in)
197729.4 mm (1.2 in)
197826.1 mm (1.0 in)
197962.0 mm (2.4 in)
198032.0 mm (1.3 in)
198131.0 mm (1.2 in)
198232.6 mm (1.3 in)
198359.5 mm (2.3 in)
198429.0 mm (1.1 in)
198537.5 mm (1.5 in)
198632.3 mm (1.3 in)
198756.2 mm (2.2 in)
198858.0 mm (2.3 in)
198956.5 mm (2.2 in)
199038.0 mm (1.5 in)
199126.8 mm (1.1 in)
199231.8 mm (1.3 in)
199330.8 mm (1.2 in)
199450.8 mm (2.0 in)
199529.2 mm (1.1 in)
199635.0 mm (1.4 in)
199734.5 mm (1.4 in)
199874.0 mm (2.9 in)
199932.1 mm (1.3 in)
200033.2 mm (1.3 in)
200126.9 mm (1.1 in)
200234.6 mm (1.4 in)
200328.6 mm (1.1 in)
200427.0 mm (1.1 in)
200544.4 mm (1.7 in)
200632.6 mm (1.3 in)
200737.0 mm (1.5 in)
200842.6 mm (1.7 in)
200935.1 mm (1.4 in)
201030.4 mm (1.2 in)
201140.7 mm (1.6 in)
201228.8 mm (1.1 in)
201324.5 mm (1.0 in)
201432.0 mm (1.3 in)
201527.4 mm (1.1 in)
201637.1 mm (1.5 in)
201745.0 mm (1.8 in)
201831.6 mm (1.2 in)
201965.8 mm (2.6 in)
202041.7 mm (1.6 in)
202163.5 mm (2.5 in)
202228.6 mm (1.1 in)
202343.0 mm (1.7 in)
202446.8 mm (1.8 in)
202529.6 mm (1.2 in)
202635.0 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Heiloo by year The wettest five days of the year at Heiloo, 1970 to 2026. The record is 126.4 mm (5.0 in) in 2021, marked on the chart; the median year is 72.9 mm (2.9 in). 050100150197019801990200020102020Record: 126.4 mm (5.0 in) in 2021
The wettest five days of the year at Heiloo, 1970 to 2026. The record is 126.4 mm (5.0 in) in 2021, marked on the chart; the median year is 72.9 mm (2.9 in).
Wettest five days (Rx5day) at Heiloo by year
YearWettest five days (Rx5day)
1970n/a
19710.0 mm (0.00 in)
19720.0 mm (0.00 in)
19730.1 mm (0.00 in)
197469.3 mm (2.7 in)
197559.3 mm (2.3 in)
197678.8 mm (3.1 in)
197773.8 mm (2.9 in)
197854.5 mm (2.1 in)
197982.5 mm (3.2 in)
198058.1 mm (2.3 in)
198182.1 mm (3.2 in)
198275.5 mm (3.0 in)
1983105.6 mm (4.2 in)
198456.9 mm (2.2 in)
198563.9 mm (2.5 in)
198696.1 mm (3.8 in)
198784.9 mm (3.3 in)
198874.9 mm (2.9 in)
198969.3 mm (2.7 in)
199054.3 mm (2.1 in)
199160.1 mm (2.4 in)
199286.2 mm (3.4 in)
199372.0 mm (2.8 in)
1994120.6 mm (4.7 in)
199564.0 mm (2.5 in)
199661.3 mm (2.4 in)
199776.0 mm (3.0 in)
1998123.8 mm (4.9 in)
199983.4 mm (3.3 in)
200068.6 mm (2.7 in)
200151.7 mm (2.0 in)
200257.5 mm (2.3 in)
200367.7 mm (2.7 in)
200450.6 mm (2.0 in)
200571.8 mm (2.8 in)
200679.0 mm (3.1 in)
200763.1 mm (2.5 in)
200879.7 mm (3.1 in)
200976.5 mm (3.0 in)
201076.9 mm (3.0 in)
201193.5 mm (3.7 in)
201278.7 mm (3.1 in)
201374.2 mm (2.9 in)
201479.9 mm (3.1 in)
201567.5 mm (2.7 in)
201657.3 mm (2.3 in)
2017120.9 mm (4.8 in)
201869.4 mm (2.7 in)
2019107.2 mm (4.2 in)
202088.8 mm (3.5 in)
2021126.4 mm (5.0 in)
202258.8 mm (2.3 in)
202393.6 mm (3.7 in)
2024111.7 mm (4.4 in)
202557.5 mm (2.3 in)
202635.2 mm (1.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Heiloo by year The longest dry spell of the year at Heiloo, 1970 to 2026. The record is 366 days in 1972, marked on the chart; the median year is 20 days. 0100200300400197019801990200020102020Record: 366 days in 1972
The longest dry spell of the year at Heiloo, 1970 to 2026. The record is 366 days in 1972, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Heiloo by year
YearLongest dry spell (CDD)
19701 day
1971365 days
1972366 days
1973365 days
197435 days
197521 days
197626 days
197719 days
197815 days
197912 days
198033 days
198130 days
198224 days
198319 days
198427 days
198529 days
198635 days
198719 days
198820 days
198918 days
199026 days
199124 days
199218 days
199318 days
199416 days
199528 days
199629 days
199719 days
199817 days
199920 days
200015 days
200113 days
200223 days
200323 days
200417 days
200513 days
200617 days
200746 days
200816 days
200924 days
201017 days
201130 days
201219 days
201324 days
201420 days
201514 days
201616 days
201713 days
201839 days
201920 days
202028 days
202117 days
202232 days
202339 days
202413 days
202529 days
202639 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

54 years, 1971 to 2025

A day with at least 34.2 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 72.3 mm (2.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Heiloo: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years34.2 mm (1.3 in)
5 years46.1 mm (1.8 in)
10 years53.2 mm (2.1 in)
25 years61.5 mm (2.4 in)
50 years67.1 mm (2.6 in)
100 years72.3 mm (2.8 in)Longer than the 54 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, 54 years of values from 1971 to 2025.

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: 74.0 mm (2.9 in) in 1998; 65.8 mm (2.6 in) in 2019; 62.0 mm (2.4 in) in 1979.

Download the Data

  • Data for Heiloo standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Heiloo 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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