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Monthly averages for Yalova from the Turkish State Meteorological Service, measured over 1931–2025.
The warmest month is August, with an average high of 28.6 °C. The coldest is January, when the average low is 3.4 °C. January has the most rainy days (15.3 on average), and July the fewest (3.8).
Month by month
| Month | Avg high °C | Avg low °C | Rainy days | Sun (h/day) |
|---|---|---|---|---|
| January | 10.1 | 3.4 | 15.3 | 2.2 |
| February | 10.7 | 3.6 | 12.9 | 3.2 |
| March | 12.7 | 4.7 | 12.4 | 4.3 |
| April | 16.9 | 8.1 | 10.6 | 5.8 |
| May | 21.4 | 12.2 | 8 | 7.7 |
| June | 26 | 16 | 5.8 | 9 |
| July | 28.5 | 18.2 | 3.8 | 9.6 |
| August | 28.6 | 18.4 | 3.8 | 8.9 |
| September | 25.1 | 15.3 | 6 | 7.3 |
| October | 20.7 | 12 | 9.8 | 4.9 |
| November | 16.4 | 8.4 | 11.4 | 2.9 |
| December | 12.3 | 5.6 | 14.5 | 1.8 |
January
In January, Yalova averages a high of 10.1 °C and a low of 3.4 °C, with about 15.3 rainy days.
February
In February, Yalova averages a high of 10.7 °C and a low of 3.6 °C, with about 12.9 rainy days.
March
In March, Yalova averages a high of 12.7 °C and a low of 4.7 °C, with about 12.4 rainy days.
April
In April, Yalova averages a high of 16.9 °C and a low of 8.1 °C, with about 10.6 rainy days.
May
In May, Yalova averages a high of 21.4 °C and a low of 12.2 °C, with about 8 rainy days.
June
In June, Yalova averages a high of 26 °C and a low of 16 °C, with about 5.8 rainy days.
July
In July, Yalova averages a high of 28.5 °C and a low of 18.2 °C, with about 3.8 rainy days.
August
In August, Yalova averages a high of 28.6 °C and a low of 18.4 °C, with about 3.8 rainy days.
September
In September, Yalova averages a high of 25.1 °C and a low of 15.3 °C, with about 6 rainy days.
October
In October, Yalova averages a high of 20.7 °C and a low of 12 °C, with about 9.8 rainy days.
November
In November, Yalova averages a high of 16.4 °C and a low of 8.4 °C, with about 11.4 rainy days.
December
In December, Yalova averages a high of 12.3 °C and a low of 5.6 °C, with about 14.5 rainy days.
Sources
Meteoroloji Genel Müdürlüğü — Yalova (1931–2025) (opens in a new tab)