Lāhījān weather in September

In September, Lāhījān sees average daytime highs of 26°C and overnight lows near 19°C, with 158 mm of rain across 14.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 24°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels muggy.

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 Lāhījān's 5th-clearest and 6th-windiest month. For the whole year in context, see Lāhījān's year-round climate.

Daytime high
26°
4th warmest
Overnight low
19°
9th coldest
Rainfall
158 mm
14.1 wet days
Daylight
12 h 12 min
5:57 AM – 6:11 PM
Cloud cover
58%
5th clearest
Wind
7 km/h
6th windiest
Solar energy
4.27 kWh/m²
Travel score
6.0
out of 10

Lāhījān is city in Gilan 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 28°C in the first days to 24°C by the end.

A typical September day in Lāhījān reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°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°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32821
42820
52820
62720
72720
82720
92720
102720
112719
122719
132619
142619
152619
162619
172619
182619
192618
202618
212518
222518
232518
242518
252517
262517
272517
282417
292417
302417

How September really feels in Lāhījān

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.

Lāhījān weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan12° / 116121.69.72.9
Feb12° / 12112.32.210.62.9
Mar15° / 11513.30.411.74.1
Apr19° / 10°8110.5012.95.8
May23° / 15°508.50147.0
Jun27° / 19°648.4014.56.7
Jul29° / 22°729.9014.35.5
Aug30° / 22°8411.7013.45.2
Sep26° / 19°15814.1012.36.0
Oct22° / 15°17414.30116.1
Nov17° / 10°16813.60.2104.9
Dec13° / 12411.50.79.53.7

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 16% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25050
35050
44951
54951
64951
74852
84852
94852
104951
114951
124852
134852
144753
154654
164753
174753
184654
194654
204654
214654
224654
234654
244654
254654
264654
274654
284654
294654
304654

Chance of precipitation in September

Any precipitation

Lāhījān gets around 158 mm of rain over 14.1 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 47% and peaks near 50% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
144
244
344
444
545
645
745
845
945
1045
1145
1245
1346
1446
1546
1646
1747
1847
1947
2048
2148
2248
2348
2449
2549
2649
2750
2850
2950
3050

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 68% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011146357
2011346346
3011446346
4011546335
5011647325
6011747314
7011848293
8011949283
9022050272
10022150252
11022252231
12022352221
13022354201
14022456180
15022556170
16032656150
17032756140
18042756130
19042857110
20053055100
2106315490
2206325480
2307345270
2409354970
25110364760
26111384550
27112394250
28114414040
29215423740
30217433430

Wind in September

Winds average 7 km/h in September.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
18calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:45 AM to 6:09 AM, and sunset from 6:35 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:35
212.85:456:33
312.85:466:32
412.75:476:30
512.75:486:29
612.65:496:27
712.65:506:26
812.65:506:24
912.55:516:22
1012.55:526:21
1112.45:536:19
1212.45:546:18
1312.45:556:16
1412.35:566:15
1512.35:566:13
1612.25:576:11
1712.25:586:10
1812.25:596:08
1912.16:006:07
2012.16:016:05
2112.06:026:03
2212.06:026:02
2311.96:036:00
2411.96:045:59
2511.96:055:57
2611.86:065:55
2711.86:075:54
2811.76:085:52
2911.76:085:51
3011.76:095:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.27 kWh/m².

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 6.42 kWh/m² in June across the year — September's 4.27 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Lāhījān

In seasonPeak

None of Lāhījān's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Lāhījān sees seasonal dust haze (May), heaviest in May.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Lāhījān?

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

6.0
Sightseeing
4th-best month of the year
5.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Lāhījān for sightseeing.

What to pack for Lāhījān in September

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

In September, Lāhījān sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Lāhījān 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 at the nearest coast (about 22 km away) is warmest in August at about 28°C and coldest in February near 10°C.

It's comfortable for a long swim from May 24 to Nov 4 — about 5.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar11Bracing
Apr13Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Lāhījān in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lāhījān peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 17UV 9Jan 11UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov3Moderate
Dec2Moderate

Air quality in Lāhījān 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 Lāhījān is worst in September — around 30 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 2129 µg/m³Jul 1115 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar26Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul15Moderate
Aug21Moderate
Sep30Moderate
Oct28Moderate
Nov22Moderate
Dec18Moderate
Location & terrain

Where is Lāhījān?

Lāhījān sits at 37.2°N, 50.0°E, 4 m above sea level, in Iran. The nearest listed city is Āstāneh-ye Ashrafīyeh, 9.0 km away.

Topography around Lāhījān

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

Within 3 km, the terrain around Lāhījān has significant variations in elevation — a maximum elevation change of 344 m around an average of 18 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,110 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,710 m.

The land around Lāhījān is covered by artificial surfaces (36%) and trees (34%) within 3 km, cropland (45%) and trees (43%) within 16 km, and water (43%) and trees (23%) within 80 km.

3 km
344 m
16 km
1,110 m
80 km
3,710 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Āstāneh-ye Ashrafīyeh 9.0 km · Langarūd 13 km · Sīāhkal 13 km · Amlash 20 km · Rūdsar 26 km · Khomām 37 km · Rasht 38 km · Bandar-e Anzalī 57 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 Lāhījān (37.2042°, 50.0092°, elevation 4 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).