May holidays are known for warmth and trips to nature. But only residents of the southern regions will be able to enjoy them. A warm cyclone from the regions of Iran will begin to shift to the southern half of the country, increasing the air temperature more and more every day. But the northern regions will be under the power of a cold anticyclone. Having rather high speeds, it will cause a short–term, but noticeable decrease in air temperature - at night the thermometer columns will drop below zero again.