Weather in Diyarbakır

August is the warmest month (average 30.7°C, high 39.0°C) and January is the coolest (average 1.6°C, low -3.2°C). That 29.1°C swing in monthly averages is the first thing to plan around in Diyarbakır.

Rain is wet season runs from December to April, inside an annual total of 501 mm. The wettest month is December at 74 mm; the driest is August at 1 mm. Diyarbakır is in Turkey at 37.9°N. The 2001–2020 NASA POWER daily record describes a continental climate with a wide temperature swing. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are June, August, and September.

When the score favours a visit

The three months with the highest comfort score are June, August, and September: June (25.6°C average, 11 mm, 37% humidity); August (30.7°C average, 1 mm, 23% humidity); September (25.6°C average, 9 mm, 27% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at December–April instead of the score.

How warm Diyarbakır gets

Monthly average highs run from 6.3°C in January to 39.0°C in August. Nights follow the same curve: -3.2°C in January and 22.3°C in August.

Across the year the mean afternoon high is 22.6°C. If you want the smallest day–night shock, look at months where the high and low sit close together; August nights still hold 22.3°C.

When Diyarbakır gets wet

The wet season in Diyarbakır starts in December and ends in April (December, January, February, March, and April). December is the core of it at 74 mm. August is the other extreme, with 1 mm.

Humidity peaks near 79%. That usually lines up with the wetter months rather than the hottest ones.

What stands out month by month

The year bottoms out in January. Plan for -3.2°C at night and 6.3°C in the afternoon. In February, Diyarbakır averages 9.0°C by day and -1.7°C at night, with 70 mm of rain. March: 14.4°C high, 2.2°C low, 65 mm rain, 71% humidity. April closes the wet season: 65 mm over 11 rainy days, then the calendar dries. May brings 48 mm and 8 rainy days; temperatures run from 11.4°C to 25.8°C. In June, Diyarbakır averages 34.1°C by day and 17.0°C at night, with 11 mm of rain.

July: 39.3°C high, 22.0°C low, 2 mm rain, 24% humidity. Peak heat arrives in August: 39.0°C by day, 22.3°C at night, and 23% humidity. September brings 9 mm and 1 rainy days; temperatures run from 17.6°C to 33.5°C. October: 25.5°C high, 11.6°C low, 39 mm rain, 44% humidity. In November, Diyarbakır averages 15.9°C by day and 3.6°C at night, with 51 mm of rain. The wet season opens in December. Expect 74 mm and 10 rainy days, with nights around -1.3°C.

Diyarbakır and other cities in Turkey

Gaziantep is about 268 km away: Diyarbakır is 1.5°C warmer than Gaziantep in its hottest month and a similar annual rainfall (462 mm in Gaziantep). Gaziantep’s wettest month is December (80 mm) versus December here.

Kayseri is about 423 km away: Diyarbakır is 9.5°C warmer than Kayseri in its hottest month and 126 mm wetter over the year than Kayseri. Kayseri’s wettest month is May (47 mm) versus December here.

Adana is about 444 km away: Diyarbakır is 0.5°C cooler than Adana in its hottest month and 136 mm drier over the year than Adana. Adana’s wettest month is December (113 mm) versus December here.