Turkey Weather in March 2025

I always check the tour page for a rough estimate of temp. and rain for a tour.
https://www.ricksteves.com/tours/greece-turkey/turkey

This information is based on past history (1980-2016), which is probably somewhat cooler than what you'd expect in the future.
Ankara: https://weatherspark.com/m/97345/3/Average-Weather-in-March-in-Ankara-Turkey
Istanbul: https://weatherspark.com/m/95434/3/Average-Weather-in-March-in-%C4%B0stanbul-Turkey
another source: https://www.weather-average.com/

Spring can be highly variable. Our tour guide in May, 2022, when it was warm to warmer, told us that 3 weeks prior it had been cold and windy.

I never look at averages, especially for months with very changeable weather. For a much better idea, use the timeanddate.com website. You can see daily weather conditions for any month for the last 10 years. Here's Istanbul for this past March.

I live not too far from Turkey, further south and east. Last year was warmer than previous years. So far this year, daily temps have often been 4-5 degrees higher than recent averages. This June was the hottest June on record.

Good advice here. Check the weather sites that others have mentioned, and be prepared for just about anything. I was in Istanbul in early March a few years ago, and it was sunny and cool. My neighbors were there in mid-March last year, and it was cold and rainy. They were wearing puffer jackets and knit caps in their photos, although I believe it warmed up on their last day there.

In March it is kinda windy , sunny and cold in the evening

It is neither so cold nor hot . You need to be prepared all the time , it may surprise you with rain