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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Dona Weather Records (CA006042063)

Record envelope, standing records and threshold days for Dona (CA006042063), Ontario, Canada, with 33 years of record.

Key Facts for Dona

  • Dona (CA006042063) is a weather station in Ontario, Canada at 48.50 latitude and -89.52 longitude, 317 m (1,040 ft) above sea level.
  • The station reports from 1926 to 1958, 33 years of record.
  • 0 records set at Dona still stand.
  • Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
  • Dona set a daily record precipitation of 5.1 mm (0.20 in) on 17 December 1958.

About the Station

  • Location: Ontario, Canada, 48.50 latitude, -89.52 longitude.
  • Elevation: 317 m (1,040 ft).
  • Period of record: 1926 to 1958, 33 years.
  • Eligible elements: prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Dona, with 2026 drawn through them The band shows the record high and record low for each calendar day at Dona. 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 Dona. 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 Dona, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

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

Wettest Day of Each Month

Aug: 68.8 mm (2.7 in)
Record daily precipitation for each month at Dona The wettest day on record for each calendar month at Dona. The most was 68.8 mm (2.7 in) on 9 August 1944. 020406080 Jan: 39.4 mm (1.6 in), 19 January 1956 Jan Feb: 45.7 mm (1.8 in), 9 February 1939 Feb Mar: 32.0 mm (1.3 in), 31 March 1952 Mar Apr: 62.7 mm (2.5 in), 30 April 1954 Apr May: 46.2 mm (1.8 in), 13 May 1942 May Jun: 48.5 mm (1.9 in), 22 June 1950 Jun Jul: 56.6 mm (2.2 in), 21 July 1955 Jul Aug: 68.8 mm (2.7 in), 9 August 1944 Aug Sep: 50.0 mm (2.0 in), 26 September 1951 Sep Oct: 53.3 mm (2.1 in), 1 October 1950 Oct Nov: 38.6 mm (1.5 in), 5 November 1948 Nov Dec: 20.6 mm (0.8 in), 1 December 1945 Dec
The wettest day on record for each calendar month at Dona. The most was 68.8 mm (2.7 in) on 9 August 1944.
Record daily precipitation for each month at Dona
MonthRecord daily precipitation (mm)Date
Jan39.4 mm (1.6 in)19 January 1956
Feb45.7 mm (1.8 in)9 February 1939
Mar32.0 mm (1.3 in)31 March 1952
Apr62.7 mm (2.5 in)30 April 1954
May46.2 mm (1.8 in)13 May 1942
Jun48.5 mm (1.9 in)22 June 1950
Jul56.6 mm (2.2 in)21 July 1955
Aug68.8 mm (2.7 in)9 August 1944
Sep50.0 mm (2.0 in)26 September 1951
Oct53.3 mm (2.1 in)1 October 1950
Nov38.6 mm (1.5 in)5 November 1948
Dec20.6 mm (0.8 in)1 December 1945

Latest Records

20
Latest records at Dona
DateStationRecordValueBeat old record byOld record stoodSignificance
17 December 1958Dona, CAdaily rain5.1 mm (0.20 in)1.3 mm (0.05 in)24 years13 of 100 (Routine)
17 December 1958Dona, CAdaily snowfall5.1 cm (2.0 in)1.3 cm (0.5 in)24 years13 of 100 (Routine)
2 December 1958Dona, CAdaily snowfall18.5 cm (7.3 in)10.9 cm (4.3 in)32 years43 of 100 (Notable)
2 December 1958Dona, CAdaily rain18.5 mm (0.7 in)10.9 mm (0.4 in)32 years20 of 100 (Routine)
24 November 1958Dona, CAdaily snowfall12.7 cm (5.0 in)7.6 cm (3.0 in)16 years23 of 100 (Routine)
24 November 1958Dona, CAdaily rain12.7 mm (0.5 in)2.0 mm (0.08 in)27 years14 of 100 (Routine)
17 November 1958Dona, CAdaily rain13.5 mm (0.5 in)1.1 mm (0.04 in)27 years12 of 100 (Routine)
9 October 1958Dona, CAdaily rain23.4 mm (0.9 in)10.2 mm (0.4 in)19 years20 of 100 (Routine)
30 August 1958Dona, CAdaily rain47.0 mm (1.9 in)9.9 mm (0.39 in)7 years15 of 100 (Routine)
21 April 1958Dona, CAdaily rain17.3 mm (0.7 in)9.7 mm (0.38 in)8 years18 of 100 (Routine)
18 December 1957Dona, CAdaily snowfall9.7 cm (3.8 in)8.9 cm (3.5 in)27 years36 of 100 (Notable)
18 December 1957Dona, CAdaily rain9.7 mm (0.38 in)8.9 mm (0.35 in)27 years20 of 100 (Routine)
18 November 1957Dona, CAdaily snowfall14.0 cm (5.5 in)3.1 cm (1.2 in)7 years11 of 100 (Routine)
18 November 1957Dona, CAdaily rain14.0 mm (0.6 in)3.1 mm (0.12 in)7 years10 of 100 (Routine)
14 November 1957Dona, CAdaily rain9.7 mm (0.38 in)3.3 mm (0.13 in)6 years9 of 100 (Routine)
14 November 1957Dona, CAdaily snowfall (Tie)6.4 cm (2.5 in)tie6 years1 of 100 (Routine)
7 November 1957Dona, CAdaily snowfall14.0 cm (5.5 in)1.3 cm (0.5 in)14 years9 of 100 (Routine)
2 November 1957Dona, CAdaily rain6.4 mm (0.25 in)0.6 mm (0.02 in)19 years8 of 100 (Routine)
7 August 1957Dona, CAdaily rain31.8 mm (1.3 in)13.5 mm (0.5 in)16 years21 of 100 (Routine)
4 July 1957Dona, CAdaily rain32.0 mm (1.3 in)8.4 mm (0.33 in)28 years20 of 100 (Routine)

Extremes by Year

1926 to 1958
Yearly extremes at Dona: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)68.8 mm (2.7 in)194439.4 mm (1.6 in)33
Wettest five days (Rx5day)100.0 mm (3.9 in)195460.2 mm (2.4 in)33
Longest dry spell (CDD)33 days195818 days33

Wettest day (Rx1day)

Wettest day (Rx1day) at Dona by year The wettest day of the year at Dona, 1926 to 1958. The record is 68.8 mm (2.7 in) in 1944, marked on the chart; the median year is 39.4 mm (1.6 in). 020406080193019401950Record: 68.8 mm (2.7 in) in 1944
The wettest day of the year at Dona, 1926 to 1958. The record is 68.8 mm (2.7 in) in 1944, marked on the chart; the median year is 39.4 mm (1.6 in).
Wettest day (Rx1day) at Dona by year
YearWettest day (Rx1day)
192616.5 mm (0.6 in)
192729.2 mm (1.1 in)
192827.2 mm (1.1 in)
192940.4 mm (1.6 in)
193033.0 mm (1.3 in)
193133.3 mm (1.3 in)
193227.7 mm (1.1 in)
193337.6 mm (1.5 in)
193432.3 mm (1.3 in)
193538.4 mm (1.5 in)
193641.9 mm (1.6 in)
193732.0 mm (1.3 in)
193854.4 mm (2.1 in)
193945.7 mm (1.8 in)
194037.3 mm (1.5 in)
194145.0 mm (1.8 in)
194246.2 mm (1.8 in)
194335.3 mm (1.4 in)
194468.8 mm (2.7 in)
194565.3 mm (2.6 in)
194649.0 mm (1.9 in)
194741.4 mm (1.6 in)
194838.6 mm (1.5 in)
194931.2 mm (1.2 in)
195057.9 mm (2.3 in)
195150.0 mm (2.0 in)
195232.5 mm (1.3 in)
195340.4 mm (1.6 in)
195462.7 mm (2.5 in)
195556.6 mm (2.2 in)
195639.4 mm (1.6 in)
195732.5 mm (1.3 in)
195847.0 mm (1.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Dona by year The wettest five days of the year at Dona, 1926 to 1958. The record is 100.0 mm (3.9 in) in 1954, marked on the chart; the median year is 60.2 mm (2.4 in). 20406080100193019401950Record: 100.0 mm (3.9 in) in 1954
The wettest five days of the year at Dona, 1926 to 1958. The record is 100.0 mm (3.9 in) in 1954, marked on the chart; the median year is 60.2 mm (2.4 in).
Wettest five days (Rx5day) at Dona by year
YearWettest five days (Rx5day)
192634.8 mm (1.4 in)
192759.4 mm (2.3 in)
192851.8 mm (2.0 in)
192982.3 mm (3.2 in)
193063.4 mm (2.5 in)
193169.1 mm (2.7 in)
193256.1 mm (2.2 in)
193357.9 mm (2.3 in)
193456.9 mm (2.2 in)
193554.6 mm (2.1 in)
193653.6 mm (2.1 in)
193753.4 mm (2.1 in)
193892.3 mm (3.6 in)
193969.9 mm (2.8 in)
194050.3 mm (2.0 in)
194177.8 mm (3.1 in)
194260.2 mm (2.4 in)
194354.8 mm (2.2 in)
194479.0 mm (3.1 in)
194578.5 mm (3.1 in)
194678.8 mm (3.1 in)
194768.6 mm (2.7 in)
194843.5 mm (1.7 in)
194956.4 mm (2.2 in)
195084.3 mm (3.3 in)
195154.8 mm (2.2 in)
195268.3 mm (2.7 in)
195382.6 mm (3.3 in)
1954100.0 mm (3.9 in)
195566.6 mm (2.6 in)
195676.2 mm (3.0 in)
195747.2 mm (1.9 in)
195854.1 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Dona by year The longest dry spell of the year at Dona, 1926 to 1958. The record is 33 days in 1958, marked on the chart; the median year is 18 days. 10203040193019401950Record: 33 days in 1958
The longest dry spell of the year at Dona, 1926 to 1958. The record is 33 days in 1958, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Dona by year
YearLongest dry spell (CDD)
192612 days
192714 days
192817 days
192920 days
193019 days
193132 days
193222 days
193314 days
193418 days
193513 days
193616 days
193723 days
193831 days
193930 days
194020 days
194119 days
194220 days
194317 days
194425 days
194516 days
194618 days
194722 days
194818 days
194921 days
195013 days
195114 days
195213 days
195316 days
195415 days
195513 days
195621 days
195719 days
195833 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

31 years, 1928 to 1958

A day with at least 40.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 81.7 mm (3.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Dona: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years40.4 mm (1.6 in)
5 years50.5 mm (2.0 in)
10 years57.6 mm (2.3 in)
25 years66.9 mm (2.6 in)
50 years74.2 mm (2.9 in)Longer than the 31 years of record
100 years81.7 mm (3.2 in)Longer than the 31 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, 31 years of values from 1928 to 1958.

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: 68.8 mm (2.7 in) in 1944; 65.3 mm (2.6 in) in 1945; 62.7 mm (2.5 in) in 1954.

Download the Data

  • Data for Dona standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Dona 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 (2025-12-31).