Niort and the surrounding areas are forecast to see pronounced weather changes on Wednesday, July 15, 2026. The morning will start cloudy, with skies thickening into dense overcast through midday. Temperatures are expected to range from 25°C to 26°C early on, rising to 29°C by late morning. Winds, initially light at 5 km/h from the northeast, will strengthen and shift to the west-northwest, reaching up to 35 km/h. Gusts could reach 60 km/h. Humidity will remain moderate, briefly rise, then ease as the morning progresses.
During the afternoon, the overcast is expected to thin and give way to clearer skies. Temperatures will climb from around 30°C to a forecast peak of 35°C before stabilizing. Winds will shift from northwest to east and southeast, then turn through south-southeast toward the west. Speeds could reach 25 km/h, with gusts up to 45 km/h. Humidity is expected to fluctuate slightly.
The forecasted heat comes amid a wider period of high temperatures in France. A historical weather listing records a maximum of 34.5°C and a minimum of 18.3°C in Montluçon on July 15. In a separate regional heat episode, L’Est Éclair reported that Aube moved from yellow heatwave vigilance on July 7 to orange from July 9, with 61 French departments under orange vigilance at one point. France’s vigilance system is applied by department, so the alert level in one department is distinct from conditions in another.
By evening, temperatures are expected to remain high, at about 33°C at the end of the afternoon, before falling as night approaches. The initially clearer sky will become increasingly overcast. Winds will ease from 25 km/h to 10 km/h, while gusts drop from 45 km/h to 20 km/h, mainly from the west and west-southwest. Humidity will rise steadily through the evening.
Overnight into Thursday, July 16, temperatures are forecast to stay between 24°C and 25°C. Winds will remain gentle, mostly from the west-southwest at around 10 km/h. Early-night gusts of up to 20 km/h are expected to weaken to 5 km/h by dawn. Cloud cover will shift from cloudy skies to high-level clouds, then clear to leave mostly open skies. Humidity will remain high and increase toward the end of the night.
Friday is expected to continue the warm pattern, with a moderate start and a hotter afternoon before temperatures gradually decline. Morning fog is forecast to give way to heavy cloud, followed by a return to overcast conditions later in the day as humidity drops. Winds will shift from northeast to west, at 5 to 10 km/h, with gusts up to 25 km/h.
Atlantic influences can bring changing wind and cloud patterns to western France in July. Temperatures around 35°C can increase heat-related risks, particularly for vulnerable people. Staying hydrated and limiting prolonged exposure during the hottest part of the day can help reduce exposure. Strong gusts and changing humidity may also affect outdoor activities and agriculture. The forecast’s 35°C peak fits a broader hot-weather pattern reported across France, while departmental vigilance levels are determined separately.
