The northwestern Ontario community is abuzz with news that NORTHWESTERN ONTARIO – WEATHER –A pleasant late-summer Thursday is shaping up across Northwestern Ontario, with sunshine and daytime temperatures in the low to mid-20s from Kenora and Fort Frances eastward through Dryden, Sioux Lookout and Nipigon.
Friday remains warm and generally dry, but the weather pattern changes Friday night into Saturday. Increasing cloud will be followed by chances of showers across much of the region, with daytime temperatures dropping several degrees by Saturday. Environment Canada put out the Northwestern Ontario forecasts early Thursday morning, August 13.
It is a cool start across Northwestern Ontario. At6:00 AM CDT, Kenora Airport was mainly clear at12.8°C, with north winds at 9 km/h, humidity of 88 per cent and rising pressure of 101.6 kPa. Dryden Airport was sunny at11.3°C, with calm winds and 96 per cent humidity. Red Lake was mainly sunny but much cooler at8.3°C, with a light north wind.
The high will reach23°C, with a humidex of 25 and a UV index of 7, or high.
Fort Frances was reporting8.5°Cwith very light north-northwest winds and 97 per cent humidity, while Sioux Lookout was12.6°Cwith fog patches, calm winds and 100 per cent humidity. At Cameron Falls, the observation used for the Nipigon area showed11.7°C, 97 per cent humidity and a light south-southwest wind at 3 km/h at 7:00 AM EDT. Thursday will besunny before becoming a mix of sun and cloud during the afternoon. The temperature climbs to25°C, with a humidex of 26 and a UV index of 7, or high. Tonight will have only a few clouds with a low of13°C. Friday, August 14starts sunny before cloud increases late in the morning. The high will again reach25°C, with a humidex of 27 and a high UV index of 7. Friday night turns cloudy with a low of16°C. Saturday, August 15will be cooler and unsettled. Expect cloudy skies with a40 per cent chance of showersand a high of22°C. The 40 per cent shower chance continues Saturday night with a low near15°C. Fort Frances will be among the warmest communities in the region Thursday. Expectmainly sunny skies and a high of 26°C, feeling closer to 28 with the humidex. The UV index will be 7, or high. Tonight will be clear with a low of13°C. Friday remains warm and pleasant. Sunshine dominates through the morning before a mix of sun and cloud develops during the afternoon. The high will reach26°C, with a humidex of 28. Cloudy periods move in Friday night as temperatures fall to15°C. The change arrives Saturday withcloudy skies, a 40 per cent chance of showers and a cooler high of 21°C. Saturday night remains cloudy with a 40 per cent chance of showers and a low of16°C. Red Lake began Thursday morning on the chilly side, but temperatures will rebound quickly. Thursday will besunny before clouds surge around noon, with a high of23°Cand humidex of 25. The UV index will be moderate at 5. Skies clear again tonight, with a low of10°C. Fridaywill start sunny before cloud increases early in the afternoon. Expect a high of24°Cand a high UV index of 6. Friday night turns cloudy with a low near15°C. Saturday is considerably cooler. Environment Canada forecastscloudy skies with a 30 per cent chance of showers and a high of only 19°C. The shower chance rises to 40 per cent Saturday night, with a low of14°C. Dryden gets a bright start Thursday before clouds become more noticeable during the afternoon. The high will reach23°C, with a humidex of 25 and a UV index of 7, or high. Skies clear this evening as temperatures fall to13°Covernight. Friday brings amix of sun and cloudand a high of24°C, feeling closer to 26 with the humidex. Friday night becomes cloudy with a low of15°C. Saturday will be cloudy and cooler, with a40 per cent chance of showers and a high of 20°C. The 40 per cent chance of showers continues Saturday night, with a low near14°C. Morning fog patches around Sioux Lookout give way to a very pleasant Thursday. Environment Canada is forecastingsunshine followed by a mix of sun and cloud this afternoon, with a high of23°C, humidex 25 and a UV index of 6, or high. Tonight will be partly cloudy and cool, dropping to10°C. Friday will bemainly sunny with a high of 24°Cand a high UV index of 7. Clouds move in Friday night, with a low of15°C. By Saturday, expect cloudy skies and a30 per cent chance of showers, with a cooler high of21°C. The chance of showers increases to 40 per cent Saturday night as temperatures fall to14°C. Nipigon will enjoy another warm summer day Thursday. Morning fog patches will dissipate before sunshine gives way to a mix of sun and cloud during the afternoon. The high will reach25°C, with a humidex of 28 and a UV index of 7, or high. Tonight will be partly cloudy with a low of14°C. Friday starts sunny before becoming a mix of sun and cloud during the morning. The high will be24°C, with a humidex of 26. Cloudy periods develop Friday night and temperatures fall to10°C. Saturday will be noticeably cooler, but precipitation is not expected during the daytime forecast. Look for amix of sun and cloud and a high of 20°C. Clouds thicken Saturday night, bringing a40 per cent chance of showersand a low of14°C. The strongest outdoor-weather window isThursday through much of Friday. Highs reach 25°C in Kenora and Nipigon Thursday and 26°C in Fort Frances, while Dryden, Red Lake and Sioux Lookout reach between 23°C and 24°C. Saturday marks the transition to cooler and wetter conditions. Red Lake falls to19°C, Dryden and Nipigon reach20°C, Fort Frances and Sioux Lookout reach21°C, and Kenora tops out around22°C. Shower probabilities range from 30 to 40 per cent in most western and inland communities, while Nipigon’s daytime forecast remains dry before showers become possible Saturday night. Thursday and Friday are solid summer-clothing days. Shorts and short-sleeved shirts will be comfortable through the afternoon, but the cool morning temperatures mean a light sweater or jacket will still be useful when heading out early. Sunscreen, sunglasses and a hat are critical Thursday and Friday because UV values are expected to reach thehigh categoryin Kenora, Fort Frances, Dryden, Sioux Lookout and Nipigon. For Saturday, add a lightweight rain jacket to the plan, particularly in Kenora, Fort Frances, Red Lake, Dryden and Sioux Lookout. Campers should also have warmer layers available: overnight lows during this forecast range from about10°C to 16°C. Large bodies of water are an essential part of Northwestern Ontario’s weather story, particularly around Lake Superior. Environment and Climate Change Canada tracks Great Lakes surface-water temperatures as part of its climate monitoring. As one historical example, during the summer of2016, surface-water temperatures across all of the Great Lakes were above their long-term averages during June, July and August, with some locations as much as3.5°C above average. For communities such as Nipigon, conditions around Lake Superior can contribute to noticeable community differences in temperature, cloud and humidity compared with locations farther inland. Forecast information is based on Environment and Climate Change Canada observations and forecasts published early Thursday, August 13, 2026. Forecasts can change as new information becomes available, particularly as the wetter system approaches for Saturday..
Community members are encouraged to stay informed and share this information with friends and family. Following trusted local news sources helps ensure everyone stays up to date with events and announcements affecting Thunder Bay and Northwestern Ontario.
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📍 Source: NetNewsLedger · By: NetNewsLedger Staff · 🗓️ August 13, 2026 · 🏠 ThunderBay.Online
