Climate Insights for Nallıhan

The climate in Nallıhan is temperate. The average annual temperature is 13°C and approximately 527mm of precipitation falls per year. January is the wettest month, receiving around 76mm of rainfall. Nallıhan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, December, February, when temperatures can drop to -3°C. Snowfall occurs from January to December, with around 84cm accumulating over the season.

Temperatures in Nallıhan vary considerably across the year, with a 34°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 31°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -3°C and the daily average is 1°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Nallıhan is a relatively dry area, receiving approximately 527mm of precipitation annually, which averages out to around 44mm per month. The wettest month is January, averaging 76mm of rainfall. May and December also tend to see above-average precipitation. The driest month is September, with just 13mm. That's 63mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 84cm accumulating over the season. January typically sees the most snow at around 35cm.

Nallıhan is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently spring in Nallıhan, which began on March 20, 2026. Nallıhan is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 31°C, while the coldest stretch bottoms out in January near -3°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Nallıhan is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 35mm per month. By contrast, January can be quite cold with temperatures dropping to -3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Nallıhan based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.