---
title: "Heat up to +37 and thunderstorms in the north: how tropical air from the Balkans will determine the weather in Ukraine on August 21"
description: "On August 21, strong heat up to +35…+37 degrees is expected in most regions of Ukraine due to tropical air from the Balkans. Brief rains with thunderstorms are forecast for the north of the country."
date: 2026-08-20T13:16:00.000Z
lang: en
url: https://xab.info/en/posts/heat-up-to-37-and-thunderstorms-forecast-for-august-21-en
tags: [ukraine-weather, heatwave, forecast, ukrgidrometcenter, thunderstorm]
publisher: "XAB.info"
---

# Heat up to +37 and thunderstorms in the north: how tropical air from the Balkans will determine the weather in Ukraine on August 21

![Heavy rain and thunderstorm in Ukraine: a street vendor under a red umbrella in a downpour, illustrating the August 21 weather forecast with heat up to +37C](https://xab.info/media/2026/08/21/zhara-do-37-i-grozy-prognoz-na-21-avgusta/zhara-do-37-i-grozy-prognoz-na-21-avgusta-1.webp)

## 🎯 Key Points

- On August 21, heat up to +35…+37 degrees is expected in most regions of Ukraine, in the southeast — +30…+34, at night +15…+20.
- The heat will be caused by tropical air (according to RBC — from the Balkans), wind southwesterly 7–12 m/s.
- Precipitation is possible only in the north — brief rain with thunderstorms; the rest of the country will have dry weather.
- There are discrepancies in sources: origin of air (Balkans vs Africa) and the exact date of cooling (middle of the week vs August 19).

### Tropical air and heat up to +37

According to the Ukrainian Hydrometeorological Center, as reported by RBC-Ukraine, on August 21, most regions of Ukraine will experience dry and hot weather caused by tropical air masses coming from the Balkans. Thermometers across the majority of the territory will rise to +35…+37 degrees. The wind will be predominantly southwesterly, strong, with speeds of 7–12 m/s, which will further intensify the feeling of heat during the daytime.

### Night mode and regional differences

At night, the air will cool down to +15…+20 degrees, however, daytime heating will remain uneven across regions. In the southeast of the country, slightly more moderate heat is expected — within the range of +30…+34 degrees, while the rest of the territory will maintain abnormally high temperatures of up to +35…+37 degrees. Thus, it is the central and western regions that will find themselves at the epicenter of the heat.

### Precipitation: where rain and thunderstorms

Throughout the day, forecasters predict dry weather without precipitation in most regions. The only exception will be the northern part of Ukraine, where brief rain accompanied by thunderstorm activity is possible during the day. These local downpours and lightning flashes will be the main contrast to the overall hot picture of the day.

### Contradictory data

When comparing versions from different publications, two inconsistencies are revealed. First, in RBC-Ukraine materials, the source of the heat is indicated as tropical air from the Balkans, whereas in the TSN.ua review headline, the talk is about “abnormal heat from Africa” — meaning the sides characterize the origin of air masses differently. Second, the main text reports that a noticeable cooling is expected “from the middle of the week,” while August 21 will still be hot; at the same time, TSN.ua previously warned about a “sharp change in weather on August 19.” This creates a discrepancy regarding which specific day the weather turn occurs and how stable it is.

### Why the home thermometer may “lie”

Forecasters remind that readings from household thermometers often exceed official forecast values. The reason is surfaces heated by the sun (asphalt, walls, instrument casing), which distort the result. Meteorologists, however, measure the temperature of the air directly in special psychrometric huts protected from direct solar radiation, so forecast figures and home instrument readings may differ.

### Weekly context

The established heat is a continuation of the hot start of the week, when temperatures in several regions already reached +33 degrees. At the same time, according to the forecast, a noticeable cooling is expected from the second half of the week, which may replace the scorching picture with a cooler one. Residents of hot regions are advised to avoid prolonged exposure to the sun, drink enough water, and account for possible thunderstorm activity in the northern part of the country.

## 🔍 Fact-Check Verification

- [In some regions it will scorch up to +37, while others will be covered by rain with thunderstorms: forecast for August 21](https://www.rbc.ua/ukr/news/odnih-oblastyah-pripeche-37-inshi-nakriyut-1787231427.html) - Первичный источник: жара до +37, тропический воздух с Балкан, ветер 7–12 м/с, грозы на севере, ночью +15…+20.
- [Hot even at night: Ukraine is covered by abnormal heat from Africa, forecasters named exact dates...](https://tsn.ua/ru/ukrayina/zharko-dazhe-nochyu-ukrainu-nakryvaet-anomalnaya-zhara-iz-afriki-sinoptiki-nazvali-tochnye-daty-podrobnyy-prognoz-3152525.html) - Подтверждает аномальную жару, но в заголовке указывает происхождение из Африки — расхождение с версией о Балканах.
- [Heat is retreating: Ukrainian Hydrometeorological Center warned of a sharp change in weather on August 19](https://tsn.ua/ru/ukrayina/zhara-otstupaet-ukrgidromettsentr-predupredil-o-rezkom-izmenenii-pogody-19-avgusta-3151043.html) - Подтверждает аномальную жару, но в заголовке указывает происхождение из Африки — расхождение с версией о Балканах.
- [Almost no rain: Ukraine is attacked by strong heat - forecast](https://glavred.info/synoptic/dozhdey-pochti-ne-budet-ukrainu-atakuet-silnaya-zhara-prognoz-10774157.html) - Совпадает с общей картиной: сильная жара и почти отсутствие дождей.

## ❓ FAQ

### Q: What temperature is expected in Ukraine on August 21?
**A:** In most regions, heat up to +35…+37 degrees is expected, in the southeast — +30…+34, at night the air will cool down to +15…+20 degrees.

### Q: Will it rain on August 21?
**A:** In most regions, the weather will be dry without precipitation. The exception is the northern part of Ukraine, where brief rain with thunderstorms is possible during the day.

### Q: Why does the home thermometer show higher than the forecast?
**A:** The household instrument is affected by surfaces heated by the sun. Meteorologists measure air temperature in psychrometric huts, so official figures may be lower.