İzmit in Fall
In fall (September, October and November), İzmit sees average daytime highs around 19°C and overnight lows near 11°C, with 232 mm of precipitation over about 30 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 26°C in early September to 12°C by late November. The sky is clear or mostly clear about 38% of the time across fall, and the air most often feels dry.
Fall is İzmit's 2nd-best season to visit on our travel score. For the whole year in context, see İzmit's year-round climate.
- Avg daytime high
- 19°C
- 2nd-warmest season
- Avg overnight low
- 11°C
- Precipitation
- 232 mm
- 30 wet days
- Avg wind
- 7 km/h
- Travel score
- 5.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in İzmit in Fall
Over the season highs ease from about 26°C in early September to 12°C by late November.
A typical fall day in İzmit reaches about 19°C and drops to 11°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in İzmit
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
İzmit weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 1° | 101 | 14 | 7.2 | 9.4 | 0.9 |
| Feb | 9° / 1° | 89 | 13.2 | 6.1 | 10.4 | 1.5 |
| Mar | 12° / 3° | 98 | 13.6 | 3.7 | 11.7 | 2.8 |
| Apr | 16° / 7° | 76 | 11.7 | 0.7 | 13.1 | 5.0 |
| May | 21° / 11° | 73 | 10.9 | 0 | 14.2 | 6.5 |
| Jun | 25° / 15° | 76 | 10.6 | 0 | 14.9 | 7.1 |
| Jul | 27° / 18° | 43 | 6.4 | 0 | 14.6 | 7.6 |
| Aug | 27° / 18° | 41 | 6.5 | 0 | 13.6 | 7.5 |
| Sep | 24° / 15° | 61 | 8.4 | 0 | 12.3 | 7.4 |
| Oct | 19° / 11° | 90 | 11.1 | 0 | 10.9 | 6.1 |
| Nov | 14° / 6° | 80 | 10.4 | 1.2 | 9.7 | 4.0 |
| Dec | 9° / 2° | 110 | 13.3 | 4.3 | 9.1 | 1.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 38% of the time across fall.
Chance of precipitation in Fall
İzmit gets around 232 mm of rain and snow over 30 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 7 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 h 18 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.2 kWh/m².
Is fall a good time to visit İzmit?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit İzmit for sightseeing.
What to pack for İzmit in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, İzmit sees daytime highs around 19°C and nights near 11°C. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 30 days see rain.
Sea temperature near İzmit in Fall
The nearest coast averages about 19°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 40 km away) is warmest in August at about 25°C and coldest in February near 7°C.
It's comfortable for a long swim from Jun 11 to Oct 10 — about 4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 7 | 8 | 10 | 16 | 21 | 24 | 25 | 23 | 19 | 15 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 7 | Bracing |
| Mar | 8 | Bracing |
| Apr | 10 | Bracing |
| May | 16 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Warm |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 11 | Bracing |
UV index in İzmit in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in İzmit peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 7 | 7 | 9 | 9 | 9 | 6 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in İzmit in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in İzmit is worst in March — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 11 | 16 | 16 | 15 | 13 | 10 | 10 | 10 | 10 | 10 | 8 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 11 | Good |
| Mar | 16 | Moderate |
| Apr | 16 | Moderate |
| May | 15 | Moderate |
| Jun | 13 | Moderate |
| Jul | 10 | Good |
| Aug | 10 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 8 | Good |
Where is İzmit?
İzmit sits at 40.8°N, 29.9°E, 19 m above sea level, in Turkey. The nearest listed city is Derince, 10 km away.
Topography around İzmit
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of İzmit.
Within 3 km, the terrain around İzmit has significant variations in elevation — a maximum elevation change of 272 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 991 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,739 m.
The land around İzmit is covered by artificial surfaces (48%) and water (26%) within 3 km, trees (54%) within 16 km, and trees (51%) and water (24%) within 80 km.
Turkey travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $18,599
- 2025
- Happiness
- 5.3 / 10
- World Happiness, 2025
- Homicide rate
- 3.2
- per 100k, 2023
- Road deaths
- 6.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 488
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for İzmit (40.765°, 29.9293°, elevation 19 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.