Climate averages 1991–2020
İzmit weather
in October.
A mild, wet month: the 6th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in İzmit: daytime highs average 20.4°C and nights cool to about 12.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 90 mm of rain on roughly 11 days, which makes October a wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 09 min on an average October day.
The nearest other city in this atlas is Derince (10 km away). In October its highs average 20.5°C, about as warm as İzmit, with 81 mm of rain.
Among the 138 cities listed in Turkey, İzmit ranks joint 67th of 138 for the warmest October highs and joint 125th of 138 for the driest October (rainfall, lowest first). The mean October high of those 138 cities is 21.4°C; İzmit is 0.9°C cooler than that mean.
From October to November, average highs fall by 4.9°C to 15.5°C, and monthly rainfall falls from 90 mm to 80 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Derince in OctoberTurkey · 10 kmHigh 20.5°C · Low 12.8°C · 81 mm rain
- Adapazarı in OctoberTurkey · 40 kmHigh 19.9°C · Low 11.0°C · 84 mm rain
- Gebze in OctoberTurkey · 42 kmHigh 19.0°C · Low 12.7°C · 62 mm rain
- Yalova in OctoberTurkey · 56 kmHigh 20.4°C · Low 13.9°C · 73 mm rain
- Sultanbeyli in OctoberTurkey · 60 kmHigh 18.9°C · Low 13.6°C · 75 mm rain
- Sancaktepe in OctoberTurkey · 64 kmHigh 19.0°C · Low 14.1°C · 75 mm rain
- Bilecik in OctoberTurkey · 69 kmHigh 19.8°C · Low 9.1°C · 44 mm rain
- Ümraniye in OctoberTurkey · 73 kmHigh 18.7°C · Low 13.9°C · 75 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.