Fog, Showers, and Chilly Breezes Will Make the Victoria Day Long Weekend One for the Layers in Thunder Bay
THUNDER BAY – WEATHER REPORT – Lake Superior is back to its old tricks—turning what could be a sunny spring weekend into a cool, damp, and fog-filled affair. The extended Victoria Day long weekend forecast in Thunder Bay calls for persistent showers, fog patches, and brisk onshore winds, with a flirtation of flurries possible Saturday night as temperatures dip toward freezing.
At 6:10 AM EDT, Thunder Bay Airport reported light rain and a misty 10.7°C with 100% humidity—it’s a sauna without the heat. Visibility is down to just 1 km thanks to fog and drizzle, and winds are currently from the east at 11 km/h. The barometric pressure is 100.6 kPa and falling.
Cloudy and Damp Into the Weekend
Today will remain cloudy with a 40 percent chance of showers, and those stubborn fog patches will linger near Lake Superior into the afternoon before (hopefully) dissipating inland. Winds will pick up from the east at 30 km/h by this afternoon. The high will make a modest attempt at 14°C, with the UV index at moderate 4—although anyone seeing the sun will have earned it.
Tonight will stay cloudy with a 40 percent chance of showers this evening, followed by more consistent rain beginning later in the night. There’s also the risk of a thunderstorm this evening and overnight. Fog patches will reform along the lakeshore and may spread inland. Winds will remain from the east at 30 km/h, becoming light late this evening. The overnight low will hold at 8°C.
Friday will bring more showers, although fog patches will finally clear by morning—perhaps giving the city a brief sigh of relief. Winds will be light from the east at 20 km/h, becoming southerly at 20 km/h in the afternoon. The high will reach 16°C under grey skies, with a moderate UV index of 3. Friday night stays cloudy with a 40 percent chance of showers and a low of 5°C.
Saturday will continue the pattern of cool and damp, with cloudy skies and a 40 percent chance of showers. Highs will barely touch 9°C, while the night will bring a twist of northern flavour—cloudy periods with a 30 percent chance of rain showers or flurries and a low around 0°C.
Sunday will finally offer a break from the clouds, with a mix of sun and cloud and a high of 10°C. The night will be clear but frosty, with a low of -1°C.
Victoria Day Monday will make the wait worthwhile, with bright sunshine and a milder high of 15°C—perfect for parades, patios, or finally getting those spring flowers in the ground.
Pack the Rain Gear—and Maybe the Mittens
Thunder Bay’s long weekend will be best enjoyed with layers and waterproof boots. The lakeshore will be especially foggy and damp, with inland areas also seeing on-and-off showers and unseasonably cool temperatures. Saturday night campers might want to bring a toque, as frost and the odd flurry are not out of the question.
Thunder Bay Weather Trivia
Did you know? Thanks to Lake Superior’s “icebox” effect, Thunder Bay holds the title for the most frequent May fog advisories in Ontario. Locals know—if it’s May, pack the raincoat and patience.
