Kimiri

When dates become green (reach what is known as the Kimiri stage) they are ready to eat, and are juicy and full of simple sugars like fructose and dextrose...

A text from ancient Mesopotamian city of Nuzi, lists green dates as one of fruits used as food in the city. Green dates are picked fresh and eaten locally, so they must have been grown in the area rather than imported... 

If this is so it means that the temperature at Nuzi must have been higher in the mid-second millennium BC than it is today. Dates cannot now grow in this region today as the climate is too cold...

Old Babylonian texts indicate that dates were harvested earlier than today. Although harvest times can vary from year to year and area to area, it would seem that the dates ripened earlier in Old Babylonian times than they do today, suggesting that the climate was warmer...

And we actually have (another) proof it was:

From "A STUDY OF DIET IN MESOPOTAMIA (c.3000 - 600 BC) AND ASSOCIATED AGRICULTURAL TECHNIQUES AND METHODS OF FOOD PREPARATION" by Elizabeth Rosemary Ellison, Institute of Archaeology, 1978 

Egtved Girl

This is the burial of the so called "Egtved Girl", a 16-18 year old girl, buried in 1370 BC in an oak coffin that was covered with the barrow Storehøj near Egtved, west of Vejle, Danemark. 

She was buried wearing s short cord skirt. 

Here is what she would have probably looked like wearing these clothes

This is the bronze figurine of a girl making a backward bridge or somersaults, found at Grevensvænge near Næstved. She is only wearing a neck ring and the same kind of cord skirt as the Egtved Girl, however, a little shorter

This is the female bronze figurine found at Fårdal near Viborg. It depicts a woman offering her breast. She is dressed in the same type of cord skirt as the Egtved girl. She could also be wearing a neck ring...

What was the climate like in Scandinavia at that time if girls could walk around dressed like this? Well much warmer. These girls lived during the so called"Minoan Warm Period" a period of time with much higher average temperatures in the Baltic than they are today. Sign of how warm South Baltic was during the time when Egtved girl lived and died is that during that time millet (type of grain) was grown in southern Scandinavia. Today millet is grown in tropical and subtropical regions...

Compare the average temperature then (red arrow on the first green bar) with average temperature now (the last green bar) on the chart...

The above chart is from my article about climate fluctuations in Europe over last 5000 years and how they affected salt extraction in my post "Fulacht Faidh - Salt extraction facility".