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Monthly averages for Düzce from the Turkish State Meteorological Service, measured over 1959–2025.
The warmest month is August, with an average high of 29.3 °C. The coldest is January, when the average low is 0.6 °C. December has the most rainy days (15.4 on average), and August the fewest (5.9).
Month by month
| Month | Avg high °C | Avg low °C | Rainy days | Sun (h/day) |
|---|---|---|---|---|
| January | 8.5 | 0.6 | 15.2 | 2 |
| February | 10.5 | 1.5 | 13.4 | 3 |
| March | 13.8 | 3.5 | 13.7 | 3.9 |
| April | 19 | 7.3 | 12.2 | 5.3 |
| May | 23.4 | 11.3 | 11.5 | 6.7 |
| June | 27.2 | 14.8 | 9.6 | 7.9 |
| July | 29.2 | 17 | 6.1 | 8.6 |
| August | 29.3 | 17.1 | 5.9 | 8.3 |
| September | 26.1 | 13.5 | 7.7 | 6.6 |
| October | 20.9 | 9.9 | 10.9 | 4.3 |
| November | 15.8 | 5.4 | 11.8 | 2.9 |
| December | 10.5 | 2.6 | 15.4 | 1.9 |
January
In January, Düzce averages a high of 8.5 °C and a low of 0.6 °C, with about 15.2 rainy days.
February
In February, Düzce averages a high of 10.5 °C and a low of 1.5 °C, with about 13.4 rainy days.
March
In March, Düzce averages a high of 13.8 °C and a low of 3.5 °C, with about 13.7 rainy days.
April
In April, Düzce averages a high of 19 °C and a low of 7.3 °C, with about 12.2 rainy days.
May
In May, Düzce averages a high of 23.4 °C and a low of 11.3 °C, with about 11.5 rainy days.
June
In June, Düzce averages a high of 27.2 °C and a low of 14.8 °C, with about 9.6 rainy days.
July
In July, Düzce averages a high of 29.2 °C and a low of 17 °C, with about 6.1 rainy days.
August
In August, Düzce averages a high of 29.3 °C and a low of 17.1 °C, with about 5.9 rainy days.
September
In September, Düzce averages a high of 26.1 °C and a low of 13.5 °C, with about 7.7 rainy days.
October
In October, Düzce averages a high of 20.9 °C and a low of 9.9 °C, with about 10.9 rainy days.
November
In November, Düzce averages a high of 15.8 °C and a low of 5.4 °C, with about 11.8 rainy days.
December
In December, Düzce averages a high of 10.5 °C and a low of 2.6 °C, with about 15.4 rainy days.
Sources
Meteoroloji Genel Müdürlüğü — Düzce (1959–2025) (opens in a new tab)