İznik in Fall
In fall (September, October and November), İznik sees average daytime highs around 20°C and overnight lows near 11°C, with 155 mm of precipitation over about 24 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 28°C in early September to 12°C by late November. The sky is clear or mostly clear about 43% of the time across fall, and the air most often feels dry.
Fall is İznik's 2nd-best season to visit on our travel score. For the whole year in context, see İznik's year-round climate.
- Avg daytime high
- 20°C
- 2nd-warmest season
- Avg overnight low
- 11°C
- Precipitation
- 155 mm
- 24 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.3
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in İznik in Fall
Over the season highs ease from about 28°C in early September to 12°C by late November.
A typical fall day in İznik reaches about 20°C and drops to 11°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in İznik
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.
İznik 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 | 8° / 1° | 74 | 11.7 | 5.9 | 9.4 | 1.1 |
| Feb | 9° / 1° | 63 | 11.1 | 5.1 | 10.4 | 1.8 |
| Mar | 12° / 3° | 75 | 12.4 | 3.2 | 11.7 | 3.2 |
| Apr | 17° / 7° | 60 | 10.5 | 0.5 | 13 | 5.5 |
| May | 22° / 11° | 56 | 9.2 | 0 | 14.2 | 7.0 |
| Jun | 26° / 15° | 57 | 9.4 | 0 | 14.8 | 7.1 |
| Jul | 29° / 18° | 28 | 4.9 | 0 | 14.6 | 6.6 |
| Aug | 29° / 18° | 25 | 4.2 | 0 | 13.6 | 6.5 |
| Sep | 26° / 15° | 40 | 6.8 | 0 | 12.3 | 7.7 |
| Oct | 21° / 11° | 57 | 8.6 | 0 | 10.9 | 6.7 |
| Nov | 15° / 6° | 57 | 8.6 | 1.1 | 9.8 | 4.5 |
| Dec | 9° / 3° | 78 | 11.9 | 4 | 9.2 | 1.8 |
Cloud cover in Fall
The sky is clear or mostly clear about 43% of the time across fall.
Chance of precipitation in Fall
İznik gets around 155 mm of rain and snow over 24 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 12 h 54 min 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 İznik?
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 İznik for sightseeing.
What to pack for İznik in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, İznik sees daytime highs around 20°C and nights near 11°C. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 24 days see rain.
Sea temperature near İznik 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 55 km away) is warmest in August at about 24°C and coldest in February near 8°C.
It's comfortable for a long swim from Jun 12 to Oct 6 — about 3.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 8 | 9 | 11 | 16 | 21 | 23 | 24 | 22 | 19 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 8 | Bracing |
| Mar | 9 | Bracing |
| Apr | 11 | Bracing |
| May | 16 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 24 | Warm |
| Sep | 22 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index in İznik in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in İznik peaks around August 10 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 | 7 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | Very high | Very 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 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in İznik 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 İznik 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 İznik?
İznik sits at 40.4°N, 29.7°E, 99 m above sea level, in Turkey. The nearest listed city is Yenişehir, 19 km away.
Topography around İznik
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of İznik.
Within 3 km, the terrain around İznik has significant variations in elevation — a maximum elevation change of 319 m around an average of 114 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,174 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,527 m.
The land around İznik is covered by trees (40%) and water (28%) within 3 km, trees (54%) within 16 km, and trees (57%) 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 İznik (40.4286°, 29.7211°, elevation 99 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.