Tonekābon weather in September

In September, Tonekābon sees average daytime highs of 21°C and overnight lows near 15°C, with 213 mm of rain across 20.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Tonekābon's 10th-clearest and 7th-windiest month. For the whole year in context, see Tonekābon's year-round climate.

Daytime high
21°
4th warmest
Overnight low
15°
9th coldest
Rainfall
213 mm
20.1 wet days
Daylight
12 h 12 min
5:54 AM – 6:08 PM
Cloud cover
60%
10th clearest
Wind
5 km/h
7th windiest
Solar energy
4.15 kWh/m²
Travel score
4.9
out of 10

Tonekābon is city in Mazandaran Province, Iran.

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 22°C in the first days to 19°C by the end.

A typical September day in Tonekābon reaches about 21°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12217
22217
32217
42217
52217
62217
72217
82116
92116
102116
112116
122116
132116
142116
152115
162015
172015
182015
192015
202015
212015
222015
232014
242014
251914
261914
271914
281914
291913
301913

How September really feels in Tonekābon

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tonekābon weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°8011.29.39.80.0
Feb / 8011.19.210.60.1
Mar / 8512.8911.71.3
Apr13° / 8114.72.912.93.2
May17° / 12°8718.60.213.94.5
Jun21° / 16°11819.9014.55.0
Jul23° / 18°12620.2014.35.3
Aug23° / 18°14620.4013.45.3
Sep21° / 15°21320.1012.24.9
Oct17° / 11°17316.50.6114.5
Nov11° / 14114.15.6102.4
Dec / 8311.18.59.50.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% 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 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34654
44555
54555
64555
74555
84456
94357
104456
114456
124456
134456
144456
154456
164555
174654
184753
194753
204852
214852
224753
234852
244852
254852
264951
274852
284852
294852
304852

Chance of precipitation in September

Any precipitation

Tonekābon gets around 213 mm of rain over 20.1 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 67% and peaks near 69% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
167
267
367
467
568
668
768
868
969
1069
1169
1269
1369
1469
1568
1668
1768
1867
1967
2066
2166
2266
2365
2465
2565
2665
2764
2864
2964
3063

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
131951261
242051241
342152221
442352201
552452181
652652161
762753140
872952120
973152100
108335090
119354970
1210374760
1311384650
1412404440
1514424230
1615433920
1716453720
1818463410
1920473210
2022482910
2124482700
2227492400
2330482200
2433481900
2536471700
2639451500
2743441400
2846421200
2950401000
305338900

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:41 AM to 6:06 AM, and sunset from 6:31 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:416:31
212.85:426:29
312.75:436:28
412.75:446:26
512.75:456:25
612.65:466:23
712.65:466:22
812.65:476:20
912.55:486:19
1012.55:496:17
1112.45:506:16
1212.45:516:14
1312.45:516:12
1412.35:526:11
1512.35:536:09
1612.25:546:08
1712.25:556:06
1812.25:566:05
1912.15:566:03
2012.15:576:01
2112.05:586:00
2212.05:595:58
2311.96:005:57
2411.96:015:55
2511.96:015:54
2611.86:025:52
2711.86:035:50
2811.76:045:49
2911.76:055:47
3011.76:065:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.15 kWh/m².

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 6.17 kWh/m² in June across the year — September's 4.15 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
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
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Tonekābon?

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

4.9
Sightseeing
4th-best month of the year
2.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Tonekābon for sightseeing.

What to pack for Tonekābon in September

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

In September, Tonekābon sees daytime highs around 21°C and nights near 15°C. Pack rain gear. About 20 days see rain.

rain gear

Sea temperature near Tonekābon in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 28°C and coldest in February near 11°C.

It's comfortable for a long swim from May 22 to Nov 5 — about 5.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar11Bracing
Apr14Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Tonekābon 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 Tonekābon peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 17UV 9Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May9Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec3Moderate

Air quality in Tonekābon 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 Tonekābon is worst in February — around 50 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (July, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorFeb 1149 µg/m³Jul 1817 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb50Poor
Mar45Poor
Apr40Poor
May33Moderate
Jun21Moderate
Jul16Moderate
Aug20Moderate
Sep25Moderate
Oct30Moderate
Nov37Poor
Dec45Poor
Location & terrain

Where is Tonekābon?

Tonekābon sits at 36.8°N, 50.9°E, -15 m above sea level, in Iran. The nearest listed city is Katālem va Sādāt Shahr, 18 km away.

Topography around Tonekābon

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

Within 3 km, the terrain around Tonekābon has only modest variations in elevation — a maximum elevation change of 53 m around an average of -15 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,463 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,754 m.

The land around Tonekābon is covered by water (37%), trees (27%) and artificial surfaces (26%) within 3 km, water (48%) and trees (42%) within 16 km, and water (45%), grassland (29%) and trees (21%) within 80 km.

3 km
53 m
16 km
1,463 m
80 km
4,754 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Katālem va Sādāt Shahr 18 km · Rāmsar 23 km · Chālūs 52 km · Nowshahr 59 km · Rūdsar 63 km · Amlash 69 km · Langarūd 77 km · Lāhījān 88 km

Iran travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 352% of US
price level, 2025
GDP per capita
$3,924
2025
Happiness
5.2 / 10
World Happiness, 2025
Safe drinking water
94%
of population, 2024
Homicide rate
2.4
per 100k, 2014
Road deaths
21.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 492
Religion
Muslim 99%Christian 1%Baha'i 0%agnostic 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 Tonekābon (36.8163°, 50.8738°, elevation -15 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).