August 17, 2026: thunderstorms and gusty winds are possible in Kenora, Fort Frances, Red Lake, Vermilion Bay, Dryden, Sioux Lookout and Pickle Lake

Northwestern Ontario is heading into a changing weather day as a system crosses the region Monday. Kenora, Fort Frances, Red Lake, Vermilion Bay, Dryden and Sioux Lookout all face a 60 percent chance of showers or thunderstorms at some point today, while showers and a thunderstorm risk move into Pickle Lake this afternoon. Gusty winds will accompany the change, followed by cooler temperatures Tuesday and considerably brighter weather for much of the region Wednesday and Thursday.

For people travelling Highway 17, Highway 105, Highway 72 or heading onto area lakes, today is a day to keep an eye on changing skies. Thunderstorms may produce rapidly changing conditions, while stronger northwest winds behind the system will make exposed lakes noticeably rougher.

Today’s Weather Overview

Kenora

Current Conditions

At 6:00 AM CDT, Kenora Airport was reporting partly cloudy skies and 14.9°C. Humidity was 83 percent, with barometric pressure at 101.4 kPa and falling. Winds were south-southwest at 12 km/h, with visibility of 32 kilometres.

The day becomes mainly cloudy with a 60 percent chance of showers or thunderstorms. Southwest winds increase to 20 km/h gusting to 40 before turning northwest at 30 km/h gusting to 50 late this morning. The high reaches 23°C, with a humidex of 26. Tonight remains partly cloudy with a 60 percent chance of showers or thunderstorms early in the evening before conditions improve. The overnight low is 10°C.

Fort Frances

Current Conditions

Fort Frances had a cool, very humid start. At 6:00 AM CDT, the temperature was 7.4°C, humidity was 97 percent, and pressure stood at 101.6 kPa and rising. Winds were calm.

Sunshine this morning gives way to a mix of sun and cloud with a 60 percent chance of showers or thunderstorms this afternoon. Southwest winds become 30 km/h gusting to 50. Fort Frances will be the warm spot in this roundup with a high of 25°C and humidex of 28. Showers or thunderstorms remain possible this evening before skies clear overnight and temperatures fall to 10°C.

Red Lake

Current Conditions

At 6:00 AM CDT, Red Lake Airport was reporting mostly cloudy skies and 16.8°C. Humidity was 71 percent, pressure was 101.1 kPa and falling, and southwest winds were blowing at 21 km/h.

The cloudy pattern continues with a 60 percent chance of showers or thunderstorms. Southwest winds at 20 km/h gusting to 50 shift northwest at 20 km/h gusting to 40 late this morning. The daytime high is 21°C. Tonight will be partly cloudy with a continued 60 percent chance of showers or thunderstorms early this evening and a low of 9°C.

Vermilion Bay

Current Conditions

Environment Canada observations for Vermilion Bay were coming from Rawson Lake. At 6:00 AM CDT, the temperature was 12.6°C, humidity was 94 percent, and pressure was 101.5 kPa and falling. Southwest winds were light at 4 km/h.

Clouds increase early this morning, followed by a 60 percent chance of showers or thunderstorms later this morning and this afternoon. Southwest winds reach 20 km/h gusting to 40 before turning northwest at 20 km/h gusting to 40 late in the afternoon. The high will be 23°C, with a humidex of 26. Tonight falls to 10°C.

Dryden

Current Conditions

Dryden Airport reported mainly clear skies and 13.1°C at 6:00 AM CDT. Humidity was high at 90 percent, pressure was 101.5 kPa, and southwest winds were blowing at 13 km/h.

Increasing cloudiness is expected this morning, with a 60 percent chance of showers or thunderstorms late this morning and through the afternoon. Winds turn from southwest to northwest and may gust to 40 km/h. The high reaches 23°C, feeling closer to 26 with the humidex. Tonight falls to 10°C after an evening thunderstorm risk.

Sioux Lookout

Current Conditions

At 6:00 AM CDT, Sioux Lookout Airport was reporting partly cloudy skies and 12.7°C. Humidity was 96 percent, pressure was 101.4 kPa and falling, and south-southwest winds were light at 7 km/h.

Clouds thicken early this morning. There is a 60 percent chance of showers or thunderstorms late this morning and this afternoon. Southwest winds increase to 20 km/h gusting to 40 before shifting northwest later today. The high reaches 21°C. Tonight brings another 60 percent chance of showers or thunderstorms early, followed by clearing and a low of 9°C.

Pickle Lake

Current Conditions

Pickle Lake had the sunniest start of the communities in this forecast. At 6:00 AM EST, Pickle Lake Airport was reporting sunny skies and 12.6°C. Humidity was 90 percent, pressure was 101.2 kPa, and southwest winds were 13 km/h.

Cloud cover increases today, with showers beginning early this afternoon and a risk of a thunderstorm. West winds increase to 20 km/h gusting to 40 near noon. The high will reach 21°C. Showers end early this evening, followed by a 30 percent chance of additional showers and a low of 12°C.

Tomorrow’s Forecast

Expected Conditions — Tuesday, August 18

Tuesday brings cooler, breezier conditions behind today’s weather system.

Kenora: A mix of sun and cloud becomes cloudy in the afternoon. Northwest winds increase to 30 km/h gusting to 50. High 22°C, with a clear Tuesday night and low of 10°C.

Fort Frances: Sunny during the morning, then a mix of sun and cloud with a 30 percent chance of afternoon showers. West winds reach 20 km/h gusting to 40. High 22°C and overnight low 11°C.

Red Lake: A mix of sun and cloud, with northwest winds at 30 km/h gusting to 50. It will feel notably cooler with a high of only 19°C. Tuesday night clears with a low of 8°C.

Vermilion Bay and Dryden: Increasing cloudiness with a 30 percent chance of afternoon showers. West winds reach 20 km/h gusting to 40. Both communities reach 20°C, followed by clear skies and lows near 9°C.

Sioux Lookout: A mix of sun and cloud with a 30 percent chance of afternoon showers. Northwest winds become the biggest factor, blowing at 30 km/h and gusting to 60 km/h. High 20°C, followed by a clear and chilly night at 8°C.

Pickle Lake: Mainly cloudy with the chance of showers increasing to 70 percent during the afternoon. West winds reach 20 km/h gusting to 40. It will be cool with a high of just 17°C, followed by a 40 percent chance of showers Tuesday night and a low of 9°C.

Wednesday, August 19

Wednesday looks considerably better across most of Northwestern Ontario.

Kenora will be sunny with a high of 22°C, while Fort Frances reaches 23°C under sunny skies. Red Lake and Dryden both reach 21°C with sunshine, and Sioux Lookout will also be sunny with a high of 21°C. Vermilion Bay reaches 21°C under sunny skies. Overnight lows generally fall into the 9°C to 13°C range.

Pickle Lake remains the exception. A mix of sun and cloud comes with a 40 percent chance of showers and a high of 18°C. Wednesday night clears and falls to 8°C.

Thursday, August 20

Thursday continues the improving trend.

Kenora reaches 23°C with a mix of sun and cloud, while Fort Frances climbs to 24°C. Red Lake will be sunny at 23°C. Vermilion Bay, Dryden and Sioux Lookout all reach a warmer 24°C, with sunshine expected through the day.

Pickle Lake also gets into the sunshine Thursday, although temperatures remain a little cooler with a high of 20°C.

Clouds begin returning Thursday night, with a chance of showers developing in several areas.

Wardrobe Recommendations

Monday calls for layers and rain protection. Temperatures will climb into the low to mid-20s across the southern part of the region, so lighter clothing will work during the warmer afternoon hours, but a waterproof jacket should be close at hand given the widespread shower and thunderstorm risk.

For people working outside, boating or travelling between communities, a wind-resistant outer layer will become increasingly useful as winds strengthen and turn northwesterly.

Tuesday will have a much cooler feel, particularly in Red Lake, Sioux Lookout and Pickle Lake. A hoodie, light fleece or windbreaker will be useful, especially in the morning and evening. Overnight temperatures falling to 8°C or 9°C in several communities are a reminder that late-summer nights in Northwestern Ontario can turn chilly quickly.

Fort Frances residents may want sunglasses and lighter clothing during today’s sunny morning, but the rain jacket should not be left behind with thunderstorms possible later this afternoon.

Weather Trivia

August temperatures vary considerably across Northwestern Ontario even over relatively short distances. Environment Canada’s climate normals for this time of year list typical daily maximums around 23°C in Kenora and Fort Frances, about 22°C in Red Lake, Dryden and Sioux Lookout, and approximately 21°C in Pickle Lake.

That helps put Tuesday’s 17°C forecast high in Pickle Lake into perspective: it is roughly four degrees below the community’s normal mid-August daytime maximum.

Source: Environment and Climate Change Canada observations and forecasts issued Monday morning, August 17, 2026. Forecast details can change during the day, particularly where thunderstorms are involved.