Giresun weather in September

In September, Giresun sees average daytime highs of 23°C and overnight lows near 18°C, with 176 mm of rain across 14.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Giresun's 4th-clearest and 10th-windiest month. For the whole year in context, see Giresun's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
176 mm
14.6 wet days
Daylight
12 h 18 min
5:13 AM – 5:29 PM
Cloud cover
55%
4th clearest
Wind
8 km/h
10th windiest
Solar energy
4.12 kWh/m²
Travel score
6.1
out of 10

Giresun is central district and city in Giresun Province, Turkey.

Air quality
Elevated
PM2.5 21.8 µg/m³ · 2019
Density
396/km²
people per km²

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 21°C by the end.

A typical September day in Giresun reaches about 23°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12420
22420
32420
42420
52419
62419
72419
82319
92319
102319
112319
122319
132319
142319
152318
162318
172318
182318
192218
202218
212218
222218
232218
242218
252217
262217
272217
282217
292117
302117

Giresun weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 13215.65.49.41.6
Feb / 9813.65.210.41.6
Mar11° / 11915.83.311.72.4
Apr14° / 10614.20.213.13.9
May18° / 14°11013.8014.35.5
Jun22° / 18°9912.4014.96.5
Jul25° / 21°8212.1014.66.8
Aug25° / 21°10213.8013.66.4
Sep23° / 18°17614.6012.36.1
Oct19° / 15°21316.2010.95.4
Nov15° / 11°14912.80.59.74.3
Dec11° / 13114.72.49.12.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35644
45545
55446
65446
75446
85446
95347
105347
115347
125248
135248
145149
155149
165149
175050
185149
195050
205050
215149
225050
235050
245050
255050
265050
275050
285050
295149
305149

Chance of precipitation in September

Any precipitation

Giresun gets around 176 mm of rain over 14.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 50% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
149
249
350
450
550
650
749
849
949
1048
1148
1248
1347
1447
1547
1647
1747
1847
1947
2047
2147
2248
2348
2448
2548
2649
2749
2848
2948
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1283144141
22103243130
32113242120
42123341110
53133440100
6314343990
7315353880
8316363770
9317363670
10318373560
11319373560
12420373460
13420383350
14421383250
15421383250
16522373150
17522373140
18622373140
19723363040
20723362940
21824362940
22924352840
231025352730
241025352630
251126352530
261226352420
271326352320
281426352220
291626362110
301626362010

Wind in September

Winds average 8 km/h in September.

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

051015151015202530
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
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 4:57 AM to 5:27 AM, and sunset from 5:55 PM to 5:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.04:575:55
212.94:585:53
312.95:005:51
412.85:015:50
512.85:025:48
612.75:035:46
712.75:045:45
812.65:055:43
912.65:065:41
1012.55:075:39
1112.55:085:38
1212.55:095:36
1312.45:105:34
1412.45:115:32
1512.35:125:31
1612.35:135:29
1712.25:145:27
1812.25:155:25
1912.15:165:24
2012.15:175:22
2112.05:185:20
2212.05:195:18
2311.95:205:16
2411.95:215:15
2511.85:225:13
2611.85:235:11
2711.85:245:09
2811.75:255:08
2911.75:265:06
3011.65:275:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 6.25 kWh/m² in June across the year — September's 4.12 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Giresun?

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

6.1
Sightseeing
4th-best month of the year
4.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Giresun for sightseeing.

What to pack for Giresun in September

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

In September, Giresun sees daytime highs around 23°C and nights near 18°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Giresun in September

The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in August at about 25°C and coldest in February near 8°C.

It's comfortable for a long swim from Jun 10 to Oct 15 — about 4.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar8Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul24Warm
Aug25Warm
Sep24Refreshing
Oct20Cool
Nov16Cool
Dec12Bracing

UV index in Giresun in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Giresun peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateLowJun 21UV 9Dec 18UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar3Moderate
Apr7High
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7Very high
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Giresun in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Giresun is worst in March — around 32 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Giresun's WHO annual average of 21.8 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2232 µg/m³Dec 1617 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb25Moderate
Mar32Moderate
Apr31Moderate
May24Moderate
Jun19Moderate
Jul20Moderate
Aug21Moderate
Sep18Moderate
Oct19Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Giresun?

Giresun sits at 40.9°N, 38.4°E, 39 m above sea level, in Turkey. The nearest listed city is Bulancak, 13 km away.

Topography around Giresun

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Giresun.

Within 3 km, the terrain around Giresun has significant variations in elevation — a maximum elevation change of 508 m around an average of 76 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,205 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,262 m.

The land around Giresun is covered by water (54%) and trees (32%) within 3 km, trees (51%) and water (47%) within 16 km, and trees (45%), water (31%) and grassland (22%) within 80 km.

3 km
508 m
16 km
1,205 m
80 km
3,262 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Bulancak 13 km · Espiye 27 km · Tirebolu 37 km · Ordu 42 km · Görele 53 km · Gürgentepe 68 km · Şebin Karahisar 70 km · Beşikdüzü 73 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 Giresun (40.917°, 38.3874°, elevation 39 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).