İznik weather in August

In August, İznik sees average daytime highs of 29°C and overnight lows near 18°C, with 25 mm of rain across 4.2 wet days and about 13.6 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 77% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is İznik's 2nd-clearest and 1st-windiest month. For the whole year in context, see İznik's year-round climate.

Daytime high
29°
1st warmest
Overnight low
18°
12th coldest
Rainfall
25 mm
4.2 wet days
Daylight
13 h 36 min
5:17 AM – 6:54 PM
Cloud cover
24%
2nd clearest
Wind
8 km/h
1st windiest
Solar energy
5.99 kWh/m²
Travel score
6.5
out of 10

İznik is district and town in the Province of Bursa, Turkey.

Density
30/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 28°C by the end.

A typical August day in İznik reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173019
183018
193018
202918
212918
222918
232918
242918
252918
262918
272917
282917
292817
302817
312817

How August really feels in İznik

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August 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 August compares with the rest of the year at a glance. August is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7411.75.99.41.1
Feb / 6311.15.110.41.8
Mar12° / 7512.43.211.73.2
Apr17° / 6010.50.5135.5
May22° / 11°569.2014.27.0
Jun26° / 15°579.4014.87.1
Jul29° / 18°284.9014.66.6
Aug29° / 18°254.2013.66.5
Sep26° / 15°406.8012.37.7
Oct21° / 11°578.6010.96.7
Nov15° / 578.61.19.84.5
Dec / 7811.949.21.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 13% of August, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6919
79010
89010
99010
109010
119010
129010
139010
148911
158911
168911
178911
188911
198911
208911
218911
228911
238911
248911
258911
268812
278812
288812
298812
308812
318713

Chance of precipitation in August

Any precipitation

İznik gets around 25 mm of rain over 4.2 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 14% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
113
213
313
413
513
613
713
813
913
1013
1113
1213
1313
1413
1513
1613
1713
1814
1914
2014
2114
2214
2314
2415
2515
2616
2716
2817
2918
3018
3119

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121942352
221842352
321842352
421843352
531843352
631843352
731844341
831844331
941845331
1041845321
1141846311
1241946301
1342046291
1442047281
1552147271
1652247260
1752346250
1852446250
1952546240
2052646230
2152746220
2252846210
2362846190
2462946180
2573046170
2683146160
2793245150
28103244140
29123343120
30133442110
31153441100

Wind in August

Winds average 8 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:02 AM to 5:32 AM, and sunset from 7:12 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:027:12
214.15:037:11
314.15:047:10
414.15:057:09
514.05:067:08
614.05:077:07
714.05:087:06
813.95:097:04
913.95:107:03
1013.95:117:02
1113.85:127:01
1213.85:136:59
1313.75:146:58
1413.75:156:57
1513.75:166:55
1613.65:176:54
1713.65:186:52
1813.55:196:51
1913.55:206:49
2013.55:216:48
2113.45:226:46
2213.45:236:45
2313.35:246:43
2413.35:256:42
2513.25:266:40
2613.25:276:39
2713.25:286:37
2813.15:296:36
2913.15:306:34
3013.05:316:32
3113.05:326:31

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.99 kWh/m².

For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 6.77 kWh/m² in July across the year — August's 5.99 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.4Intense
46.4Intense
56.4Intense
66.3Intense
76.3Intense
86.3Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.1Intense
146.1Intense
156.0Intense
166.0Intense
176.0Bright
185.9Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.6Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
315.3Bright
Planning a trip in August

Is August a good time to visit İznik?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.5
Sightseeing
6th-best month of the year
8.4
Beach & pool
1st-best month of the year

August is a reasonable time to visit İznik for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for İznik in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, İznik sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near İznik in August

The nearest coast averages about 24°C in August — 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.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar9Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul23Refreshing
Aug24Warm
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in İznik in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highModerateLowAug 10UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr7Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in İznik in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2316 µg/m³Dec 198 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar16Moderate
Apr16Moderate
May15Moderate
Jun13Moderate
Jul10Good
Aug10Good
Sep10Good
Oct10Good
Nov10Good
Dec8Good
Location & terrain

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.

3 km
319 m
16 km
1,174 m
80 km
2,527 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Yenişehir 19 km · Osmaneli 26 km · Karamürsel 31 km · Gölcük 33 km · Orhangazi 36 km · Derince 37 km · Körfez 38 km · Bilecik 39 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
Muslim 100%other 0%

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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).