National seasonal maps from the Copernicus Climate Change Service show high pressure dominating Ukraine in September 2026. Proslav reports that lower cyclone activity will favor calm, dry conditions and mean temperatures about 1.5–2 °C above the climatological norm, with a notable deficit of rain in the first half of the month and elevated fire and soil-drought risk in vulnerable areas.
For Kyiv specifically, meteoprog’s breakdown foresees summer-like conditions at the start of September (daytime +20–25 °C, nights near +13 °C). The second decade should remain warm (+21–24 °C by day, +10–12 °C at night). A first real autumnal cool-down is expected after 18 September, with daytime highs falling toward +16–19 °C by the month’s end and nights around +8 °C. Forecasters do not expect substantial precipitation in Kyiv; coastal areas may see more variable weather due to a warm Black Sea acting as a heat reservoir.
Readers should re-check local forecasts before making plans, and local authorities and landowners should note heightened fire danger where drought persists.