A Brief Period Of Extreme Heat Event Summary - New Daily Maximum Temperature Records Set In New Brunswick, Nova Scotia, Quebec & Ontario 06/24/2025

Weather summary

for New Brunswick

issued by Environment Canada

at 7:50 a.m. ADT Wednesday 25 June 2025.

Discussion.

The following areas set a daily maximum temperature record on June 

24, 2025 (temperature values given in degrees Celsius): 

FREDERICTON AREA (Fredericton CDA CS) 

New record of 34.4 

Old record of 33.9 set in 1975 

Records in this area have been kept since 1871 

GRAND MANAN AREA (Grand Manan Sar CS) 

New record of 32.1 

Old record of 26.9 set in 2013 

Records in this area have been kept since 1962 

MONCTON AREA (Moncton/greater Moncton Romeo Leblanc Intl A) 

New record of 33.7 

Old record of 32.2 set in 1975 

Records in this area have been kept since 1881 

ST. STEPHEN AREA (St. Stephen) 

New record of 36.0 

Old record of 33.3 set in 1976 

Records in this area have been kept since 1951 

Note: the temperature records reported here have been derived from a 

selection of historical stations in each geographic area that were 

active during the period of record.

Please note that this summary may contain preliminary or unofficial 

information and does not constitute a complete or final report.

End/ASPC

Weather summary

for Nova Scotia

issued by Environment Canada

at 7:52 a.m. ADT Wednesday 25 June 2025.

Discussion.

The following areas set a daily maximum temperature record on June 

24, 2025 (temperature values given in degrees Celsius): 

KEJIMKUJIK (NATIONAL PARK) AREA (Kejimkujik 1) 

New record of 34.4 

Old record of 32.2 set in 1975 

Records in this area have been kept since 1966 

KENTVILLE AREA (Kentville CDA CS) 

New record of 33.2 

Old record of 32.8 set in 1975 

Records in this area have been kept since 1898 

TRURO AREA (Debert) 

New record of 29.5 

Old record of 29.4 set in 1947 

Records in this area have been kept since 1873 

Note: the temperature records reported here have been derived from a 

selection of historical stations in each geographic area that were 

active during the period of record.

Please note that this summary may contain preliminary or unofficial 

information and does not constitute a complete or final report.

End/ASPC

Weather summary

for Quebec

issued by Environment Canada

at 9:35 a.m. EDT Wednesday 25 June 2025.

Discussion.

Maximum daily temperature records were broken on June 24 over 

Southern Quebec. 

The following is a summary of weather event information received by 

Environment Canada. 

Location (old record, record year) - new record (the records are in 

degrees Celsius): 

Montreal (32.4, 2003) - 35.6 

Mirabel (31.7, 2003) - 33.7 

Saint-Anicet (31.7, 2003) - 35.0 

L'Acadie (33.6, 2003) - 34.7 

Sainte-Clotilde (32.2, 2003) - 34.3 

L'Assomption (34.8, 2003) - 35.8 

Trois-Rivières (34.0, 2003) - 34.9 

Shawinigan (32.2, 1943) - 33.3 

Victoriaville (33.0, 2003) - 34.4 

Rivière-du-Loup (28.5, 1995) - 29.8 

Baie-Comeau (28.9, 1975) - 31.7 

Montreal broke the maximum temperature record for the month of June. 

The old record was 35.0 degrees Celsius, observed on June 30, 1964.

Please note that this summary may contain preliminary or unofficial 

information and does not constitute a complete or final report.

End/QSPC

Weather summary

for Ontario and the National Capital Region

issued by Environment Canada

at 10:55 a.m. EDT Wednesday 25 June 2025.

Discussion.

Southern Ontario saw multiple daily maximum temperature records with 

an ongoing heat event. 

The following areas set a daily maximum temperature record on June 

24, 2025 (temperature values given in degrees Celsius): 

BANCROFT AREA (Bancroft Auto) 

New record of 32.2 

Old record of 31.7 set in 2003 

Records in this area have been kept since 1882 

KEMPTVILLE AREA (Kemptville CS) 

New record of 33.7 

Old record of 32.8 set in 1907 

Records in this area have been kept since 1902 

KINGSTON AREA (Kingston Climate) 

New record of 31.7 

Old record of 30.6 set in 1919 

Records in this area have been kept since 1872 

NORFOLK AREA (Delhi CS) 

New record of 35.8 

Old record of 35.6 set in 1923 

Records in this area have been kept since 1866 

OSHAWA AREA (Oshawa) 

New record of 35.4 

Old record of 33.9 set in 1923 

Records in this area have been kept since 1882 

OTTAWA (RICHMOND - METCALFE) AREA (Ottawa Intl A) 

New record of 34.3 

Old record of 33.2 set in 2003 

Records in this area have been kept since 1938 

ST. CATHARINES AREA (Vineland Station RCS) 

New record of 35.6 

Old record of 35.0 set in 1923 

Records in this area have been kept since 1901 

TORONTO DOWNTOWN AREA (Toronto City) 

New record of 36.5 

Old record of 35.6 set in 1923 

Records in this area have been kept since 1840 

TRENTON AREA (Trenton A) 

New record of 34.4 

Old record of 31.7 set in 1966 

Records in this area have been kept since 1921 

Note: the temperature records reported here have been derived from a 

selection of historical stations in each geographic area that were 

active during the period of record.

Please note that this summary may contain preliminary or unofficial 

information and does not constitute a complete or final report.

End/OSPC