Climate averages 1991–2020
Thunder Bay weather
in June.
A mild, moderately wet month: the 3rd warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in Thunder Bay: daytime highs average 18.3°C and nights cool to about 10.7°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 65 mm of rain on roughly 11 days, which makes June a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 02 min on an average June day.
The nearest other city in this atlas is Duluth (278 km away). In June its highs average 19.6°C, 1.3°C warmer than Thunder Bay, with 105 mm of rain.
Among the 86 cities listed in Canada, Thunder Bay ranks 80th of 86 for the warmest June highs and 8th of 86 for the driest June (rainfall, lowest first). The mean June high of those 86 cities is 21.4°C; Thunder Bay is 3.1°C cooler than that mean.
From June to July, average highs rise by 4.0°C to 22.3°C, and monthly rainfall rises from 65 mm to 76 mm.
The annual picture
June in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Thunder Bay climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -9.6°C-16.6°C | -16.6°C | 29 | 6.5 | 8.89 h |
| February | -8.0°C-15.0°C | -15.0°C | 22 | 4.9 | 10.210 h |
| March | -1.7°C-8.7°C | -8.7°C | 31 | 6.8 | 11.912 h |
| April | 5.1°C-2.2°C | -2.2°C | 54 | 8.3 | 13.614 h |
| May | 12.5°C4.2°C | 4.2°C | 66 | 10.1 | 15.215 h |
| June, selected | 18.3°C10.7°C | 10.7°C | 65 | 10.5 | 16.016 h |
| July | 22.3°C15.3°C | 15.3°C | 76 | 10.6 | 15.716 h |
| August | 22.3°C15.6°C | 15.6°C | 67 | 9.1 | 14.314 h |
| September | 17.8°C11.7°C | 11.7°C | 84 | 10.5 | 12.613 h |
| October | 9.9°C4.8°C | 4.8°C | 72 | 10.4 | 10.911 h |
| November | 2.3°C-2.8°C | -2.8°C | 49 | 7.8 | 9.39 h |
| December | -4.8°C-11.3°C | -11.3°C | 38 | 7.4 | 8.48 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Duluth in JuneUnited States · 278 kmHigh 19.6°C · Low 13.2°C · 105 mm rain
- Sault Ste. Marie in JuneCanada · 424 kmHigh 21.0°C · Low 11.8°C · 81 mm rain
- Green Bay in JuneUnited States · 440 kmHigh 24.1°C · Low 14.9°C · 91 mm rain
- Appleton in JuneUnited States · 463 kmHigh 24.0°C · Low 14.9°C · 89 mm rain
- Brooklyn Park in JuneUnited States · 481 kmHigh 24.7°C · Low 15.7°C · 110 mm rain
- Saint Paul in JuneUnited States · 482 kmHigh 24.9°C · Low 15.9°C · 110 mm rain
- Minneapolis in JuneUnited States · 487 kmHigh 24.9°C · Low 15.8°C · 110 mm rain
- Plymouth, United States in JuneUnited States · 493 kmHigh 24.6°C · Low 15.7°C · 111 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Thunder Bay) is explained once on the Thunder Bay year overview and on the Sources, method and limits page.