Climate averages 1991–2020
İzmit weather
in May.
A warm, moderately wet month: the 5th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in İzmit: daytime highs average 22.3°C and nights cool to about 12.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 73 mm of rain on roughly 11 days, which makes May a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 26 min on an average May day.
The nearest other city in this atlas is Derince (10 km away). In May its highs average 22.3°C, about as warm as İzmit, with 59 mm of rain.
Among the 138 cities listed in Turkey, İzmit ranks joint 70th of 138 for the warmest May highs and joint 110th of 138 for the driest May (rainfall, lowest first). The mean May high of those 138 cities is 22.4°C; İzmit is 0.2°C cooler than that mean.
From May to June, average highs rise by 3.7°C to 25.9°C, and monthly rainfall rises from 73 mm to 75 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
İzmit climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.8°C1.4°C | 1.4°C | 101 | 13.9 | 9.610 h |
| February | 10.2°C1.8°C | 1.8°C | 90 | 13.4 | 10.611 h |
| March | 13.2°C3.9°C | 3.9°C | 97 | 13.9 | 11.912 h |
| April | 17.9°C7.7°C | 7.7°C | 76 | 11.7 | 13.313 h |
| May, selected | 22.3°C12.4°C | 12.4°C | 73 | 10.9 | 14.414 h |
| June | 25.9°C16.8°C | 16.8°C | 75 | 10.6 | 15.015 h |
| July | 28.0°C19.2°C | 19.2°C | 43 | 6.5 | 14.815 h |
| August | 28.2°C19.8°C | 19.8°C | 41 | 6.4 | 13.814 h |
| September | 25.0°C16.5°C | 16.5°C | 61 | 8.4 | 12.513 h |
| October | 20.4°C12.6°C | 12.6°C | 90 | 11.0 | 11.211 h |
| November | 15.5°C7.3°C | 7.3°C | 80 | 10.4 | 10.010 h |
| December | 10.5°C3.4°C | 3.4°C | 110 | 13.5 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Derince in MayTurkey · 10 kmHigh 22.3°C · Low 12.6°C · 59 mm rain
- Adapazarı in MayTurkey · 40 kmHigh 21.6°C · Low 10.9°C · 73 mm rain
- Gebze in MayTurkey · 42 kmHigh 20.5°C · Low 12.0°C · 44 mm rain
- Yalova in MayTurkey · 56 kmHigh 21.8°C · Low 13.0°C · 39 mm rain
- Sultanbeyli in MayTurkey · 60 kmHigh 20.2°C · Low 12.8°C · 35 mm rain
- Sancaktepe in MayTurkey · 64 kmHigh 20.1°C · Low 13.2°C · 35 mm rain
- Bilecik in MayTurkey · 69 kmHigh 21.5°C · Low 9.8°C · 49 mm rain
- Ümraniye in MayTurkey · 73 kmHigh 19.7°C · Low 13.0°C · 35 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for İzmit) is explained once on the İzmit year overview and on the Sources, method and limits page.