Khomeyn weather in September

In September, Khomeyn sees average daytime highs of 28°C and overnight lows near 13°C, with 1 mm of rain across 0.5 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 25°C by the end. The sky is clear or mostly clear about 87% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Khomeyn's 1st-clearest and 9th-windiest month. For the whole year in context, see Khomeyn's year-round climate.

Daytime high
28°
4th warmest
Overnight low
13°
9th coldest
Rainfall
1 mm
0.5 wet days
Daylight
12 h 12 min
5:58 AM – 6:10 PM
Cloud cover
13%
1st clearest
Wind
8 km/h
9th windiest
Solar energy
6.31 kWh/m²
Travel score
8.0
out of 10

Khomeyn is city in Markazi 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 30°C in the first days to 25°C by the end.

A typical September day in Khomeyn reaches about 28°C in the afternoon and slips back to 13°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
13116
23115
33115
43015
53015
63015
73015
83014
93014
102914
112914
122914
132913
142913
152813
162813
172813
182812
192812
202712
212712
222712
232711
242611
252611
262611
272611
282511
292510
302510

How September really feels in Khomeyn

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.

Khomeyn weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°306.15.4100.1
Feb / -4°326.34.210.71.0
Mar12° / 437.5311.73.4
Apr17° / 378.30.312.85.8
May23° / 11°205.8013.77.7
Jun30° / 16°41.1014.26.6
Jul33° / 19°10.30144.4
Aug32° / 18°10.2013.25.0
Sep28° / 13°10.5012.28.0
Oct21° / 113.3011.28.1
Nov13° / 255.10.910.34.0
Dec / -3°285.83.79.81.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 87% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 2%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1982
2982
3982
4982
5982
6982
7991
8991
9991
10991
11991
12991
13982
14982
15982
16982
17982
18982
19982
20973
21973
22973
23973
24973
25964
26964
27964
28964
29955
30955

Chance of precipitation in September

Any precipitation

Khomeyn gets around 1 mm of rain over 0.5 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 2% and peaks near 4% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
132
142
152
162
172
182
192
202
212
223
233
243
253
263
273
283
293
304

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 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 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
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 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 60 minutes over September. Sunrise moves from 5:47 AM to 6:08 AM, and sunset from 6:31 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:476:31
212.75:486:30
312.75:496:29
412.65:496:27
512.65:506:26
612.65:516:24
712.55:526:23
812.55:526:22
912.55:536:20
1012.45:546:19
1112.45:546:17
1212.35:556:16
1312.35:566:14
1412.35:566:13
1512.25:576:12
1612.25:586:10
1712.25:596:09
1812.15:596:07
1912.16:006:06
2012.16:016:04
2112.06:016:03
2212.06:026:02
2312.06:036:00
2411.96:035:59
2511.96:045:57
2611.86:055:56
2711.86:065:54
2811.86:065:53
2911.76:075:52
3011.76:085:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.31 kWh/m².

For context, solar energy here swings from a low near 3.09 kWh/m² to a high of 7.9 kWh/m² in June across the year — September's 6.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.6Intense
86.6Intense
96.5Intense
106.5Intense
116.5Intense
126.4Intense
136.4Intense
146.4Intense
156.3Intense
166.3Intense
176.3Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.0Intense
236.0Intense
246.0Bright
255.9Bright
265.9Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Khomeyn?

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

8.0
Sightseeing
2nd-best month of the year
8.9
Beach & pool
1st-best month of the year

September is one of the better times to visit Khomeyn for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Khomeyn in September

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

In September, Khomeyn sees daytime highs around 28°C and nights near 13°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Khomeyn in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Khomeyn peaks around July 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 21UV 11Jan 10UV 3
UV index (midday)Level
Jan3Moderate
Feb5High
Mar7High
Apr7Very high
May11Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep9Very high
Oct7Very high
Nov4Moderate
Dec3Moderate

Air quality in Khomeyn 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 Khomeyn is worst in April — around 39 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (August, 25 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1939 µg/m³Aug 1825 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb30Moderate
Mar34Moderate
Apr39Poor
May37Poor
Jun29Moderate
Jul31Moderate
Aug25Moderate
Sep29Moderate
Oct28Moderate
Nov27Moderate
Dec26Moderate
Location & terrain

Where is Khomeyn?

Khomeyn sits at 33.6°N, 50.1°E, 1,809 m above sea level, in Iran. The nearest listed city is Golpāyegān, 28 km away.

Topography around Khomeyn

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

Within 3 km, the terrain around Khomeyn has only modest variations in elevation — a maximum elevation change of 232 m around an average of 1,819 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,403 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,746 m.

The land around Khomeyn is covered by cropland (41%) and artificial surfaces (35%) within 3 km, cropland (56%) and bare terrain (23%) within 16 km, and bare terrain (47%), cropland (27%) and grassland (24%) within 80 km.

3 km
232 m
16 km
1,403 m
80 km
2,746 m
grasslandcroplandartificial surfacesbare terrain
September weather nearby: Golpāyegān 28 km · Alīgūdarz 44 km · Maḩallāt 46 km · Khānsār 51 km · Aznā 61 km · Arāk 62 km · Karahrūd 62 km · Delījān 68 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 Khomeyn (33.6389°, 50.08°, elevation 1,809 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).