Thunder Bay Intl
Weather station · 48.4°N 89.3°W · 197 m above sea level
ICAO CYQTWMO 71749Station data since 1941
Record high
26.1°C
in 1958
Record low
−6.8°C
in 1995
Average high
14.8°C
all years on record
14.1°C short of the record for 23 September
Today’s high 12.0°C against 26.1°C in 1958. A reading that beats it is flagged here automatically, once a second cycle confirms it.
All-time record high
40.3°C
- Date
- Sunday, 7 August 1983
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Thunder Bay Intl, Canada
- Position
- 48.37°N 89.33°W · 197 m
Highest highest in available records since 1941. Source: NOAA GHCN-Daily.
All-time record low
−43.2°C
- Date
- Wednesday, 31 January 1996
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Thunder Bay Intl, Canada
- Position
- 48.37°N 89.33°W · 197 m
Highest and lowest lowest in available records since 1941. Source: NOAA GHCN-Daily.
Where Thunder Bay Intl is
48.37°N 89.33°W
Records by month
Jan
8.3°
−43.2°
Feb
15.5°
−40.6°
Mar
22.8°
−36.7°
Apr
28.3°
−22.2°
May
35.2°
−8.9°
Jun
39.0°
−2.8°
Jul
37.2°
0.0°
Aug
40.3°
−1.1°
Sep
33.1°
Recent days
| Day | High | At | Low | At |
|---|---|---|---|---|
| 2026-09-23 | 12.0°C | 00:00 UTC | 2.0°C | 06:43 UTC |
| 2026-09-22 | 16.0°C | 16:00 UTC | 10.0°C | 15:00 UTC |
Nearby stations
- THUNDER BAY CS, ONTCanada0.6 km
- Thunder Bay IntlCanada0.6 km
- Welcome IslandCanada15.8 km
- Grand Marais MuniUnited States98.8 km
- Grand Marais BayUnited States103.1 km
- Upsala Canada111.2 km
Data sources for this page
| Figure | Source | Type |
|---|---|---|
| Right now, today so far | NOAA Aviation Weather Center (METAR) and NOAA NWS WMO bulletins (SYNOP) | Measured, station |
| All-time, monthly and on-this-day records | NOAA NCEI Global Historical Climatology Network daily (GHCN-Daily), 1941 to 2004 | Measured, station |
| Nearby stations and distances | Computed from station positions in our own database | Calculated |
