On Thursday, September 17, 2026, most regions of Ukraine are expected to enjoy sunny and dry weather with an “ideal” daytime temperature. However, meteorologists warn that as early as next week the country will be hit by a noticeable cooling spell accompanied by rain. This is reported by RBC-Ukraine, citing a Facebook post by meteorologist and forecaster Natalka Didenko.

Daytime +20…+24°C and the maximum in Zakarpattia

According to the expert, during the daytime hours on September 17, thermometer readings in most oblasts will rise to +20…+24°C. It will be warmest in Zakarpattia — around +23…+26°C. As Didenko clarified, in the vast majority of oblasts the weather will be mostly clear, and only in the west will the proximity of an atmospheric front bring light precipitation.

Kyiv: a clear day and around +13°C at night

In the capital, Thursday is promised to be “wonderful” — clear and sunny. According to the forecast chart from the Ukrainian Hydrometeorological Center, nighttime temperatures in Kyiv will drop to an average of +13°C, while during the day the air will warm to comfortable levels, perfect for strolls through the parks.

Bad weather is already on the way: from September 21

In conclusion, Didenko reminded that, according to preliminary forecasts, a significant spell of bad weather is approaching Ukraine: as early as next week, from September 21, rain and a sharp cooling are expected in most oblasts. “For now — parks, vegetable gardens and little plots, white sneakers, beautiful sunny selfies… Buy a new bright umbrella for next week,” the forecaster summed up. The street scene points to the same thing: on a sunny day, city dwellers walk in light clothing and white sneakers, making the most of the last warm day before the weather regime shifts.

Context: a cyclone from the Balkans

Additional data from meteorologists indicates that the sharp cooling is caused by a cyclone moving in from the Balkans, which will bring a burst of elemental force and stormy wind gusts. Thus, the warm and dry September 17 will be the last “window” of Indian summer before the weather regime changes.

How temperature is measured

Recall that the Ukrainian Hydrometeorological Center previously explained exactly how specialists measure air temperature and why a home thermometer can “lie.” This is important to keep in mind when comparing official forecasts with the readings of household devices on the windowsill.