New heat records were set in several southern Alberta communities on Thursday, Nov. 13, 2025. (Photo: Marianvejcik | Dreamstime.com)

By David Opinko

Heat records set Thursday in southern Alberta

Nov 14, 2025 | 11:39 AM

Although the region took its first steps into winter on Friday, the day before was much warmer.

Environment Canada says heat records were set in six communities in southern Alberta on Thursday, Nov. 13.

Claresholm was the hottest, reaching a maximum of 20 degrees Celsius. This broke the community’s record that was set 35 years ago in 1990.

The rural area of Onefour, located in the southeast corner of the province, broke its heat record that had been standing for the last 92 years. It got up to 19.8 degrees on Thursday.

The full list of local heat records is as follows:

Nighttime construction on Hwy 3 in Lethbridge starts April 17

Apr 17, 2025

SASHA launches #BuyABed fundraiser to support vulnerable Lethbridge residents

Apr 04, 2025

$20K grants available: TELUS STORYHIVE Pan-Asian Edition opens applications April 1

Mar 18, 2025

• BOW ISLAND AREA
  • New record of 20.2
  • Old record of 19.7 set in 2001
  • Records in this area have been kept since 1961
• CARDSTON AREA
  • New record of 18.6
  • Old record of 18.5 set in 1990
  • Records in this area have been kept since 1918
• CLARESHOLM AREA
  • New record of 20.0
  • Old record of 17.0 set in 1990
  • Records in this area have been kept since 1951
• CROWSNEST AREA
  • New record of 14.8
  • Old record of 13.0 set in 1990
  • Records in this area have been kept since 1965
• DRUMHELLER AREA
  • New record of 19.1
  • Old record of 17.1 set in 2023
  • Records in this area have been kept since 1923
• ONEFOUR AREA
  • New record of 19.8
  • Old record of 17.2 set in 1933
  • Records in this area have been kept since 1928

Environment Canada says Lethbridge got up to 21 degrees on Thursday, but it was not enough to set a new heat record.