---
title: "Perfect warmth before the storm: where in Ukraine it will heat up to +26°C on September 17 and when everything will change abruptly"
description: "On September 17, Ukraine is expected to have sunny and dry weather with daytime temperatures of +20…+24°C, warmest in Zakarpattia up to +26°C. However, from September 21, meteorologists promise rain and a sharp cooling."
date: 2026-09-16T10:38:01.000Z
lang: en
url: https://xab.info/en/posts/weather-in-ukraine-september-17
tags: [ukraine-weather, temperature-forecast, autumn-2026, kiev-weather, bad-weather]
publisher: "XAB.info"
---

# Perfect warmth before the storm: where in Ukraine it will heat up to +26°C on September 17 and when everything will change abruptly

![People walking in light summer clothes on a sunny street on a warm September day in Ukraine](https://xab.info/media/2026/09/16/pogoda-v-ukraine-17-sentyabrya/pogoda-v-ukraine-17-sentyabrya-1.webp)

## 🎯 Key Points

- On September 17, clear and dry weather with daytime temperatures of +20…+24°C is expected in most oblasts of Ukraine, and up to +23…+26°C in Zakarpattia.
- In Kyiv the day will be clear and sunny, with nighttime temperatures around +13°C.
- From September 21, rain and a sharp cooling are expected in most oblasts, linked to a cyclone moving in from the Balkans.

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.

## 🔍 Fact-Check Verification

- [Perfect warmth before the storm: where it will heat up to +26°C tomorrow and when everything will change abruptly](https://www.rbc.ua/ukr/news/idealne-teplo-pered-negodoyu-de-zavtra-progrie-1789553795.html) - Основной источник: прогноз Диденко на 17 сентября, +20…+24°С, Закарпатье +23…+26°С, Киев ночью +13°С, непогода с 21 сентября.
- [A cyclone from the Balkans brings a burst of elemental force and cooling to Ukraine: meteorologists warned ...](https://tsn.ua/ru/ukrayina/na-ukrainu-s-tsiklonom-s-balkan-nadvigayutsya-udar-stihii-i-poholodanie-sinoptiki-predupredili-gde-nakroet-bolshe-vsego-karta-3166127.html) - Указывает на циклон с Балкан как причину надвигающейся непогоды и похолодания.
- [Indian summer up to +26°C will end quickly: from September 21 — rain and a sharp cooling](https://my.ua/news/cluster/2026-09-15-babe-leto-do-26deg-bystro-zakonchitsia-s-21-sentiabria-dozhdi-i-rezkoe-pokholodanie) - Подтверждает завершение тёплого периода и начало дождей/похолодания с 21 сентября.
- [Cooling and stormy gusts are heading to Ukraine: what to expect in the first weekend of September — Didenko](https://focus.ua/ukraine/766738-pogoda-5-sentyabrya-ukrainu-zhdut-silnyy-veter-dozhdi-i-poholodanie-didenko) - Относится к более раннему прогнозу (5 сентября), использовано лишь как контекст о стиле прогнозов Диденко, не подтверждает цифры на 17 сентября.

## ❓ FAQ

### Q: What weather is expected in Ukraine on September 17, 2026?
**A:** In most oblasts — clear and dry weather with daytime temperatures of +20…+24°C; warmest in Zakarpattia, around +23…+26°C. Light precipitation is possible only in the western oblasts due to the proximity of an atmospheric front.

### Q: What is the weather forecast for Kyiv on September 17?
**A:** Kyiv is expected to have a clear and sunny day; nighttime temperatures will drop to an average of +13°C.

### Q: When will the cooling spell with rain begin in Ukraine?
**A:** According to preliminary forecasts, as early as next week — from September 21 — rain and a sharp cooling are expected in most oblasts, linked to a cyclone moving in from the Balkans.