Bīdestān weather in September

In September, Bīdestān sees average daytime highs of 29°C and overnight lows near 15°C, with 4 mm of rain across 1.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 26°C by the end. The sky is clear or mostly clear about 94% 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 Bīdestān's 2nd-clearest and 4th-windiest month. For the whole year in context, see Bīdestān's year-round climate.

Daytime high
29°
4th warmest
Overnight low
15°
9th coldest
Rainfall
4 mm
1.2 wet days
Daylight
12 h 12 min
5:57 AM – 6:11 PM
Cloud cover
11%
2nd clearest
Wind
9 km/h
4th windiest
Solar energy
5.63 kWh/m²
Travel score
7.4
out of 10

Bīdestān is city in Qazvin Province, Iran.

Founded
2002

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 31°C in the first days to 26°C by the end.

A typical September day in Bīdestān reaches about 29°C in the afternoon and slips back to 15°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°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)
13217
23117
33117
43117
53116
63116
73116
83016
93016
103016
113015
123015
133015
142915
152915
162915
172915
182914
192814
202814
212814
222814
232814
242713
252713
262713
272713
282613
292612
302612

How September really feels in Bīdestān

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.

Bīdestān weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°478.16.29.80.0
Feb / -2°569.35.810.60.7
Mar12° / 7211.13.911.73.2
Apr18° / 7511.20.812.95.8
May24° / 12°338.20.113.97.4
Jun30° / 16°72014.46.4
Jul33° / 18°41.3014.24.6
Aug33° / 18°30.7013.44.7
Sep29° / 15°41.2012.27.4
Oct22° / 10°305.30.111.17.9
Nov13° / 5581.910.13.8
Dec / -1°488.44.99.60.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 94% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 4% of September, with mostly cloudy or overcast conditions the remaining 2%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11000
2991
3991
4991
5991
6991
7991
8991
9991
10982
11982
12982
13982
14982
15982
16982
17982
18982
19982
20982
21982
22973
23973
24973
25964
26964
27955
28946
29937
30937

Chance of precipitation in September

Any precipitation

Bīdestān gets around 4 mm of rain over 1.2 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 4% and peaks near 8% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
53
63
73
83
93
104
114
124
134
144
154
164
174
184
195
205
215
225
235
245
256
266
276
287
297
308

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
180191
281181
382171
484151
585141
686131
787121
887121
988111
1089101
1189101
129091
139280
149280
159370
169460
179460
189550
199550
209640
219730
229730
239820
249820
259820
269910
279910
289910
299910
309910

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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
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 5:45 AM to 6:09 AM, and sunset from 6:33 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:33
212.85:466:32
312.75:476:30
412.75:476:29
512.75:486:27
612.65:496:26
712.65:506:24
812.55:516:23
912.55:516:21
1012.55:526:20
1112.45:536:18
1212.45:546:17
1312.35:556:15
1412.35:556:14
1512.35:566:12
1612.25:576:11
1712.25:586:09
1812.15:596:08
1912.15:596:06
2012.16:006:04
2112.06:016:03
2212.06:026:01
2312.06:036:00
2411.96:045:58
2511.96:045:57
2611.86:055:55
2711.86:065:54
2811.86:075:52
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 5.63 kWh/m².

For context, solar energy here swings from a low near 2.63 kWh/m² to a high of 7.47 kWh/m² in June across the year — September's 5.63 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Bīdestān?

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

7.4
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 Bīdestān for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Bīdestān in September

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

In September, Bīdestān sees daytime highs around 29°C and nights near 15°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Bīdestān 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 Bīdestān peaks around July 18 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 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 highExtremeVery highHighModerateJul 18UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar4Moderate
Apr7Very high
May9Very high
Jun10Very high
Jul11Extreme
Aug10Very high
Sep7Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Bīdestān 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 Bīdestān is worst in December — around 80 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (July, 37 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 1979 µg/m³Jul 1837 µg/m³
PM2.5 (µg/m³)Level
Jan73Unhealthy
Feb69Unhealthy
Mar63Unhealthy
Apr63Unhealthy
May54Poor
Jun40Poor
Jul37Poor
Aug39Poor
Sep46Poor
Oct58Unhealthy
Nov68Unhealthy
Dec80Unhealthy
Location & terrain

Where is Bīdestān?

Bīdestān sits at 36.2°N, 50.1°E, 1,291 m above sea level, in Iran. The nearest listed city is Sharīfābād, 3.0 km away.

Topography around Bīdestān

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

Within 3 km, the terrain around Bīdestān has only modest variations in elevation — a maximum elevation change of 73 m around an average of 1,290 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,141 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,538 m.

The land around Bīdestān is covered by cropland (79%) within 3 km, cropland (52%) and grassland (23%) within 16 km, and grassland (52%) and cropland (28%) within 80 km.

3 km
73 m
16 km
1,141 m
80 km
4,538 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Sharīfābād 3.0 km · Moḩammadīyeh 5.0 km · Alvand 7.0 km · Qazvin 12 km · Eqbālīyeh 18 km · Maḩmūdābād Nemūneh 21 km · Ābyek 42 km · Tākestān 42 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 Bīdestān (36.231°, 50.1236°, elevation 1,291 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).