Īstgāh-e Rāh Āhan-e Garmsār weather in September

In September, Īstgāh-e Rāh Āhan-e Garmsār sees average daytime highs of 33°C and overnight lows near 20°C, with 1 mm of rain across 0.3 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 30°C by the end. The sky is clear or mostly clear about 96% of the time in September, and the air most often feels dry.

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 Īstgāh-e Rāh Āhan-e Garmsār's 2nd-clearest and 7th-windiest month. For the whole year in context, see Īstgāh-e Rāh Āhan-e Garmsār's year-round climate.

Daytime high
33°
4th warmest
Overnight low
20°
9th coldest
Rainfall
1 mm
0.3 wet days
Daylight
12 h 12 min
5:49 AM – 6:02 PM
Cloud cover
5%
2nd clearest
Wind
9 km/h
7th windiest
Solar energy
6.15 kWh/m²
Travel score
5.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 30°C by the end.

A typical September day in Īstgāh-e Rāh Āhan-e Garmsār reaches about 33°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13523
23522
33522
43522
53522
63422
73422
83421
93421
103421
113421
123321
133320
143320
153320
163320
173220
183219
193219
203219
213219
223119
233118
243118
253118
263018
273017
283017
293017
302917

How September really feels in Īstgāh-e Rāh Āhan-e Garmsār

Once humidity and wind are folded in, September averages 19 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
19
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Īstgāh-e Rāh Āhan-e Garmsār weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 214.81.29.92.5
Feb12° / 224.9110.73.9
Mar18° / 295.80.411.76.5
Apr24° / 13°183.7012.98.0
May30° / 19°71.8013.86.2
Jun36° / 24°10.3014.32.8
Jul38° / 27°10.2014.11.2
Aug37° / 25°10.2013.32.2
Sep33° / 20°10.3012.25.2
Oct26° / 14°71.6011.18.6
Nov17° / 224.60.210.16.1
Dec11° / 225.30.39.73.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 96% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 3% of September, with mostly cloudy or overcast conditions the remaining 1%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
18991
19991
20991
21991
22991
23982
24982
25973
26973
27973
28973
29973
30964

Chance of precipitation in September

Any precipitation

Īstgāh-e Rāh Āhan-e Garmsār gets around 1 mm of rain over 0.3 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 1% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
262
272
282
292
302

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
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 5:37 AM to 5:59 AM, and sunset from 6:24 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:376:24
212.75:386:22
312.75:396:21
412.75:396:20
512.65:406:18
612.65:416:17
712.65:426:15
812.55:426:14
912.55:436:12
1012.45:446:11
1112.45:456:09
1212.45:456:08
1312.35:466:06
1412.35:476:05
1512.35:486:03
1612.25:496:02
1712.25:496:00
1812.15:505:59
1912.15:515:57
2012.15:525:56
2112.05:525:54
2212.05:535:53
2312.05:545:51
2411.95:555:50
2511.95:555:48
2611.85:565:47
2711.85:575:45
2811.85:585:44
2911.75:595:42
3011.75:595:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.15 kWh/m².

For context, solar energy here swings from a low near 2.81 kWh/m² to a high of 8.03 kWh/m² in June across the year — September's 6.15 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.7Intense
36.7Intense
46.6Intense
56.6Intense
66.6Intense
76.5Intense
86.5Intense
96.4Intense
106.4Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.1Intense
176.1Intense
186.0Intense
196.0Bright
205.9Bright
215.9Bright
225.8Bright
235.8Bright
245.8Bright
255.7Bright
265.7Bright
275.6Bright
285.6Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Īstgāh-e Rāh Āhan-e Garmsār?

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

5.2
Sightseeing
6th-best month of the year
8.4
Beach & pool
1st-best month of the year

September is a reasonable time to visit Īstgāh-e Rāh Āhan-e Garmsār for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Īstgāh-e Rāh Āhan-e Garmsār in September

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

In September, Īstgāh-e Rāh Āhan-e Garmsār sees daytime highs around 33°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Īstgāh-e Rāh Āhan-e Garmsār in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Īstgāh-e Rāh Āhan-e Garmsār peaks around July 18 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highVery highHighModerateJul 18UV 10Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar4Moderate
Apr7Very high
May9Very high
Jun9Very high
Jul10Extreme
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Īstgāh-e Rāh Āhan-e Garmsār 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 Īstgāh-e Rāh Āhan-e Garmsār is worst in December — around 73 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (July, 28 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyDec 2072 µg/m³Jul 2228 µg/m³
PM2.5 (µg/m³)Level
Jan69Unhealthy
Feb64Unhealthy
Mar56Unhealthy
Apr56Unhealthy
May47Poor
Jun32Moderate
Jul28Moderate
Aug29Moderate
Sep39Poor
Oct49Poor
Nov62Unhealthy
Dec73Unhealthy
Location & terrain

Where is Īstgāh-e Rāh Āhan-e Garmsār?

Īstgāh-e Rāh Āhan-e Garmsār sits at 35.2°N, 52.3°E, 848 m above sea level, in Iran. The nearest listed city is Garmsār, 3.0 km away.

Topography around Īstgāh-e Rāh Āhan-e Garmsār

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Īstgāh-e Rāh Āhan-e Garmsār.

Within 3 km, the terrain around Īstgāh-e Rāh Āhan-e Garmsār has only modest variations in elevation — a maximum elevation change of 110 m around an average of 851 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,431 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,171 m.

The land around Īstgāh-e Rāh Āhan-e Garmsār is covered by bare terrain (62%) and cropland (21%) within 3 km, bare terrain (74%) and cropland (23%) within 16 km, and bare terrain (68%) and grassland (21%) within 80 km.

3 km
110 m
16 km
1,431 m
80 km
4,171 m
treesgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Garmsār 3.0 km · Kahrīzak 44 km · Pīshvā 54 km · Damāvand 58 km · Mojtame‘-e Maskūnī-ye Nāmjū 59 km · Varāmīn 61 km · Pākdasht 63 km · Rūdehen 66 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 Īstgāh-e Rāh Āhan-e Garmsār (35.2345°, 52.3094°, elevation 848 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. 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).