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Monthly averages for Zonguldak from the Turkish State Meteorological Service, measured over 1938–2025.
The warmest month is August, with an average high of 25.5 °C. The coldest is January, when the average low is 3.6 °C. January has the most rainy days (17.8 on average), and July the fewest (6.6).
Month by month
| Month | Avg high °C | Avg low °C | Rainy days | Sun (h/day) |
|---|---|---|---|---|
| January | 9.3 | 3.6 | 17.8 | 2.3 |
| February | 9.6 | 3.6 | 15.6 | 2.8 |
| March | 11 | 4.7 | 15.1 | 3.8 |
| April | 14.9 | 8.1 | 12.2 | 5.2 |
| May | 18.9 | 12.2 | 10.8 | 6.9 |
| June | 23.1 | 16 | 8.6 | 9.1 |
| July | 25.3 | 18.1 | 6.6 | 9.9 |
| August | 25.5 | 18.3 | 6.8 | 9.2 |
| September | 22.5 | 15.5 | 8.5 | 7.2 |
| October | 18.8 | 12.3 | 12.3 | 4.9 |
| November | 15.3 | 9 | 13.6 | 3.4 |
| December | 11.7 | 5.8 | 17.5 | 2.4 |
January
In January, Zonguldak averages a high of 9.3 °C and a low of 3.6 °C, with about 17.8 rainy days.
February
In February, Zonguldak averages a high of 9.6 °C and a low of 3.6 °C, with about 15.6 rainy days.
March
In March, Zonguldak averages a high of 11 °C and a low of 4.7 °C, with about 15.1 rainy days.
April
In April, Zonguldak averages a high of 14.9 °C and a low of 8.1 °C, with about 12.2 rainy days.
May
In May, Zonguldak averages a high of 18.9 °C and a low of 12.2 °C, with about 10.8 rainy days.
June
In June, Zonguldak averages a high of 23.1 °C and a low of 16 °C, with about 8.6 rainy days.
July
In July, Zonguldak averages a high of 25.3 °C and a low of 18.1 °C, with about 6.6 rainy days.
August
In August, Zonguldak averages a high of 25.5 °C and a low of 18.3 °C, with about 6.8 rainy days.
September
In September, Zonguldak averages a high of 22.5 °C and a low of 15.5 °C, with about 8.5 rainy days.
October
In October, Zonguldak averages a high of 18.8 °C and a low of 12.3 °C, with about 12.3 rainy days.
November
In November, Zonguldak averages a high of 15.3 °C and a low of 9 °C, with about 13.6 rainy days.
December
In December, Zonguldak averages a high of 11.7 °C and a low of 5.8 °C, with about 17.5 rainy days.
Sources
Meteoroloji Genel Müdürlüğü — Zonguldak (1938–2025) (opens in a new tab)