The most comfortable time to visit Kocaeli is from mid April to mid June, and again from mid September to early November. For sun, aim for June to mid September; for walking, go from late February to mid May.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from June to mid September. It peaks in late August, at 73. Avoid mid November to early April for this: it falls to 0, mostly because it is too cool. The clearest skies come in July, when the sky is typically 41% covered at midday (partly cloudy).
The being outside season here runs from mid April to mid June, with a second spell from mid September to early November. It peaks in early October, at 81. The weakest stretch is in late January, when it drops to 3, mostly because it is too cold.
For walking, go from late February to mid May, with a second spell from October to mid December. It peaks in late April, at 81. Avoid late July to August for this: it falls to 2, mostly because it is too warm.
The year, measured
The average temperature in Kocaeli over the whole year is 15°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 4°C. The rainy (wet) season in Kocaeli runs from November to March, peaking in December with a 24% chance of rain on a given day. The dry season is April to October; August is the driest month, at 6%. Winds in Kocaeli are highest in July, averaging 2.1 m/s (8 km/h), and lightest in October, at 1.5 m/s (5 km/h). The prevailing wind is from the N. The clearest skies in Kocaeli come in July, when the sky is typically 36% covered; January is the cloudiest month, at 66%.
Month by month Kocaeli climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 9°C | 4°C | 6°C | 22% | 66% | 1.9 m/s | 8 | 0 | 43 |
| February | 11°C | 5°C | 8°C | 20% | 64% | 1.9 m/s | 16 | 1 | 55 |
| March | 13°C | 6°C | 10°C | 17% | 62% | 1.9 m/s | 26 | 0 | 65 |
| April | 18°C | 9°C | 15°C | 11% | 53% | 2.0 m/s | 58 | 6 | 78 |
| May | 21°C | 13°C | 20°C | 14% | 57% | 1.9 m/s | 75 | 23 | 63 |
| June | 27°C | 18°C | 27°C | 11% | 44% | 1.9 m/s | 51 | 62 | 18 |
| July | 29°C | 20°C | 30°C | 6% | 36% | 2.1 m/s | 27 | 70 | 6 |
| August | 29°C | 21°C | 31°C | 6% | 42% | 2.1 m/s | 21 | 68 | 3 |
| September | 26°C | 17°C | 26°C | 9% | 46% | 1.8 m/s | 59 | 56 | 27 |
| October | 20°C | 12°C | 20°C | 12% | 54% | 1.5 m/s | 78 | 16 | 70 |
| November | 15°C | 9°C | 14°C | 17% | 57% | 1.6 m/s | 44 | 3 | 77 |
| December | 11°C | 6°C | 8°C | 24% | 63% | 1.7 m/s | 15 | 0 | 59 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Kocaeli weather by season
Year round, Kocaeli has days of about 9°C at their warmest in January, its coolest month, and 29°C in August, its warmest; the coolest hours of the day run from 4°C to 21°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around December and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Kocaeli weather in winterDecember to February
Winter in Kocaeli has typical daily highs of about 10°C and lows of about 5°C, with a 22% chance of rain on a given day.
Kocaeli weather in springMarch to May
Spring in Kocaeli has typical daily highs of about 17°C and lows of about 9°C, with a 14% chance of rain on a given day.
Kocaeli weather in summerJune to August
Summer in Kocaeli has typical daily highs of about 28°C and lows of about 20°C, with a 8% chance of rain on a given day.
Kocaeli weather in autumnSeptember to November
Autumn in Kocaeli has typical daily highs of about 20°C and lows of about 13°C, with a 13% chance of rain on a given day.
When is the rainy season in Kocaeli?
The rainy (wet) season in Kocaeli runs from November to March, peaking in December with a 24% chance of rain on a given day. The dry season is April to October; August is the driest month, at 6%.
What time of year is Kocaeli windiest?
Winds in Kocaeli are highest in July, averaging 2.1 m/s (8 km/h), and lightest in October, at 1.5 m/s (5 km/h). The prevailing wind is from the N.
What is the average temperature in Kocaeli year round?
The average temperature in Kocaeli over the whole year is 15°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 4°C.
Where to go instead in late January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.