The natural climatic conditions of Azerbaijan are unique! As it well known, that in Azerbaijan exist 9 out of 11 climatic zones. Dry, subtropical with hot summers and mild winters; forests, meadows and alpine tundra in the mountains...

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1 Half-deserts and dry steppes with soft winter and dry hot climate
2 Half-deserts and dry steppes with cold winter and dry hot climate
3 Moderately warm climate with dry winter
4 Moderately warm climate with dry summer
5 Moderately warm climate almost with uniform distribution of sedimentaries
6 Cold climate with dry summer
7 Cold climate with dry winter
8 Cold climate with plentiful quantity of sedimentaries in all seasons
9 Climate mountainous tunrdas

In general, the best time to visit is mid April through October when days are warm or hot (highs in the 70s and 80s F/21-30 C). July and August in Baku can bring daytime highs of up to 100 F/38 C. Evenings tend to be cool, even in the summer (low temperatures can reach 65 F/18 C). Don't go from December to late February, when inland temperatures can be bitterly cold -- even in Baku, it can reach below the freezing point. The climate varies considerably from east to west -- in the western mountains, the weather is drier and more extreme. The eastern part of Azerbaijan, near the Caspian Sea, has a more moderate climate. No matter when you go, be sure to take a sweater for the cool evenings.