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İzmit, Turkey climate
Csa Hot-summer Mediterranean
İzmit has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 30°C, while the coldest is January averaging around 3°C at night. Around 652 mm of precipitation falls each year, peaking in October (87 mm) and easing off in July (27 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)İzmit climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 12 | 17 | 22 | 27 | 30 | 30 | 26 | 21 | 15 | 11 |
| Avg temp (°C) | 6 | 7 | 9 | 13 | 18 | 23 | 26 | 26 | 22 | 17 | 12 | 8 |
| Avg low (°C) | 3 | 3 | 5 | 8 | 14 | 18 | 21 | 22 | 18 | 14 | 9 | 5 |
| Precipitation (mm) | 67 | 70 | 60 | 41 | 40 | 29 | 27 | 29 | 45 | 87 | 71 | 86 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 12 | 17 | 22 | 27 |
| Avg temp (°C) | 6 | 7 | 9 | 13 | 18 | 23 |
| Avg low (°C) | 3 | 3 | 5 | 8 | 14 | 18 |
| Precipitation (mm) | 67 | 70 | 60 | 41 | 40 | 29 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 26 | 21 | 15 | 11 |
| Avg temp (°C) | 26 | 26 | 22 | 17 | 12 | 8 |
| Avg low (°C) | 21 | 22 | 18 | 14 | 9 | 5 |
| Precipitation (mm) | 27 | 29 | 45 | 87 | 71 | 86 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 75 | 70 | 65 | 58 | 44 | 31 | 32 | 46 | 62 | 68 | 77 |
| Relative humidity (%) | 84 | 82 | 79 | 77 | 74 | 70 | 66 | 67 | 68 | 76 | 80 | 83 |
| Wind speed (mph) | 9.5 | 9.7 | 9.3 | 8.0 | 7.5 | 7.7 | 9.3 | 10.4 | 9.3 | 9.1 | 8.9 | 9.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 75 | 70 | 65 | 58 | 44 |
| Relative humidity (%) | 84 | 82 | 79 | 77 | 74 | 70 |
| Wind speed (mph) | 9.5 | 9.7 | 9.3 | 8.0 | 7.5 | 7.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 31 | 32 | 46 | 62 | 68 | 77 |
| Relative humidity (%) | 66 | 67 | 68 | 76 | 80 | 83 |
| Wind speed (mph) | 9.3 | 10.4 | 9.3 | 9.1 | 8.9 | 9.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ataturk, a weather station, about 96 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.