Weather radar Thunder Bay
Real-time precipitation radar · Ontario · Canada
Thunder Bay climate table – average temperature, precipitation & sunshine hours
The climate table for Thunder Bay shows long-term monthly averages (2000–2023): average high and average low temperature in °C, monthly precipitation (mm), rainy days and sunshine hours per month. Data source: ERA5 reanalysis (ECMWF) via the WDTEC Climate Archive.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | -8.7° | -8.4° | -1.7° | 4.4° | 11.3° | 17.4° | 22.2° | 21.9° | 17.8° | 10.1° | 3° | -4.3° |
| Avg low (°C) | -15.4° | -15.1° | -8.3° | -2.3° | 3.8° | 10.3° | 15.4° | 15.7° | 12° | 5.2° | -2° | -10.8° |
| Precipitation (mm) | 29 | 25 | 35 | 65 | 71 | 70 | 71 | 66 | 81 | 70 | 47 | 44 |
| Rainy days | 7 | 5 | 7 | 9 | 11 | 11 | 11 | 9 | 10 | 10 | 8 | 8 |
| Sunshine hours | 158 | 197 | 257 | 281 | 325 | 346 | 376 | 339 | 263 | 190 | 134 | 128 |
| Humidity | – | – | – | – | – | – | – | – | – | – | – | – |
Best time to visit Thunder Bay
The best time to visit Thunder Bay is typically August. In this month the average high is 21.9°C, precipitation is 66 mm and sunshine duration is 339 hours. The annual average high is 7.1°C, total annual precipitation is 674 mm (106 rainy days/year) and annual sunshine is 2994 hours.
Frequently asked questions about the weather in Thunder Bay
How up to date is the weather radar for Thunder Bay?
The weather radar for Thunder Bay is updated every 5 minutes with new radar data from the US NEXRAD network. A 2-hour forecast animation is also available. Rainfall probability, wind gusts and UV index are available up to 14 days in advance.
What weather data is available for Thunder Bay?
Besides the rain radar, RadarWeather provides for Thunder Bay: rainfall probability, thunderstorm warning (CAPE index), wind gusts, UV index, air pressure, humidity, dew point, sunshine hours, snow line and a 14-day forecast based on ICON-D2, ECMWF IFS and GFS.
When are thunderstorms expected in Thunder Bay?
The thunderstorm potential for Thunder Bay is calculated from the CAPE index and lightning potential. Active storm cells and severe weather warnings are visible on the radar map in real time. Thunderstorm warnings are issued automatically as soon as storm cells are detected near Thunder Bay.
What is the climate like in Thunder Bay?
Thunder Bay has an annual average high of 7.1°C. The warmest month is July (avg high 22.2°C), the coldest January (avg low -15.4°C). The wettest month is September with 81 mm, the driest February with 25 mm. Total annual precipitation is 674 mm (106 rainy days). Annual sunshine is 2994 hours.
Weather radar near Thunder Bay
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