Reẕvānshahr weather in September

In September, Reẕvānshahr sees average daytime highs of 24°C and overnight lows near 21°C, with 187 mm of rain across 13.4 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 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 45% 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 Reẕvānshahr's 4th-clearest and 8th-windiest month. For the whole year in context, see Reẕvānshahr's year-round climate.

Daytime high
24°
4th warmest
Overnight low
21°
9th coldest
Rainfall
187 mm
13.4 wet days
Daylight
12 h 12 min
6:01 AM – 6:15 PM
Cloud cover
49%
4th clearest
Wind
8 km/h
8th windiest
Solar energy
3.97 kWh/m²
Travel score
6.5
out of 10

Reẕvānshahr 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 26°C in the first days to 23°C by the end.

A typical September day in Reẕvānshahr reaches about 24°C in the afternoon and slips back to 21°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12623
22623
32622
42622
52522
62522
72522
82522
92522
102522
112522
122521
132421
142421
152421
162421
172421
182421
192421
202420
212320
222320
232320
242320
252320
262320
272319
282319
292219
302219

Reẕvānshahr 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
Jan10° / 134145.59.72.1
Feb10° / 120135.210.61.9
Mar12° / 10914.6311.72.7
Apr15° / 12°8414.20.312.94.1
May20° / 17°5512.10146.1
Jun25° / 21°567.3014.57.7
Jul27° / 24°525.6014.37.7
Aug27° / 24°797.9013.47.2
Sep24° / 21°18713.4012.36.5
Oct21° / 17°25015.80115.6
Nov16° / 12°23515.91104.2
Dec12° / 15413.939.53.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27129
37129
47030
56931
66931
76733
86733
96634
106535
116535
126436
136436
146337
156238
166238
176139
186139
196040
206040
215941
225941
235941
245842
255842
265743
275644
285644
295545
305446

Chance of precipitation in September

Any precipitation

Reẕvānshahr gets around 187 mm of rain over 13.4 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 44% and peaks near 52% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
135
235
336
437
537
638
739
840
940
1041
1141
1242
1343
1443
1544
1645
1745
1846
1946
2047
2148
2248
2349
2450
2550
2651
2751
2852
2952
3052

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1022145266
2022345256
3022445245
4032545235
5032645224
6032745213
7042845203
8042945192
9053046182
10063045172
11063146161
12073246141
13073247131
14083247121
15093347110
16093347100
17010334790
18011334790
19012334780
20013334770
21014344660
22015344560
23116344450
24117354350
25119354140
26220353940
27221363830
28322373630
29423373430
30424373220

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.

0246810151015202530
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 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 5:48 AM to 6:13 AM, and sunset from 6:39 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:486:39
212.85:496:37
312.85:496:36
412.75:506:34
512.75:516:32
612.65:526:31
712.65:536:29
812.65:546:28
912.55:556:26
1012.55:556:25
1112.45:566:23
1212.45:576:21
1312.45:586:20
1412.35:596:18
1512.36:006:17
1612.26:016:15
1712.26:026:13
1812.26:026:12
1912.16:036:10
2012.16:046:08
2112.06:056:07
2212.06:066:05
2311.96:076:04
2411.96:086:02
2511.96:096:00
2611.86:095:59
2711.86:105:57
2811.76:115:56
2911.76:125:54
3011.76:135:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.97 kWh/m².

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 6.26 kWh/m² in June across the year — September's 3.97 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.4Bright
84.3Bright
94.3Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Reẕvānshahr

In seasonPeak

In September, Reẕvānshahr sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Reẕvānshahr's rainy season runs September–February, when most of the year's rain falls.

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

Is September a good time to visit Reẕvānshahr?

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

6.5
Sightseeing
4th-best month of the year
5.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Reẕvānshahr for sightseeing.

What to pack for Reẕvānshahr in September

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

In September, Reẕvānshahr sees daytime highs around 24°C and nights near 21°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Reẕvānshahr 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 10°C.

It's comfortable for a long swim from May 22 to Nov 4 — about 5.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr13Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov18Cool
Dec14Bracing

UV index in Reẕvānshahr 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 Reẕvānshahr peaks around July 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Reẕvānshahr 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 Reẕvānshahr is worst in March — around 27 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1826 µg/m³Jul 1315 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb21Moderate
Mar27Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul14Moderate
Aug20Moderate
Sep25Moderate
Oct23Moderate
Nov21Moderate
Dec20Moderate
Location & terrain

Where is Reẕvānshahr?

Reẕvānshahr sits at 37.5°N, 49.1°E, 15 m above sea level, in Iran. The nearest listed city is Māsāl, 21 km away.

Topography around Reẕvānshahr

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

Within 3 km, the terrain around Reẕvānshahr has only modest variations in elevation — a maximum elevation change of 107 m around an average of 14 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,430 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,325 m.

The land around Reẕvānshahr is covered by cropland (49%) and trees (22%) within 3 km, trees (42%), water (28%) and cropland (21%) within 16 km, and water (34%), grassland (29%) and trees (22%) within 80 km.

3 km
107 m
16 km
1,430 m
80 km
3,325 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Māsāl 21 km · Bandar-e Anzalī 30 km · Şowme‘eh Sarā 32 km · Hashtpar 34 km · Fūman 39 km · Khomām 49 km · Rasht 50 km · Khalkhāl 54 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 Reẕvānshahr (37.5495°, 49.1374°, 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).