Būmahen in Fall
In fall (September, October and November), Būmahen sees average daytime highs around 16°C and overnight lows near 9°C, with 66 mm of precipitation over about 12 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 26°C in early September to 5°C by late November. The sky is clear or mostly clear about 73% of the time across fall, and the air most often feels dry.
Fall is Būmahen's 2nd-best season to visit on our travel score. For the whole year in context, see Būmahen's year-round climate.
- Avg daytime high
- 16°C
- 2nd-warmest season
- Avg overnight low
- 9°C
- Precipitation
- 66 mm
- 12 wet days
- Avg wind
- 6 km/h
- Travel score
- 5.9
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Būmahen in Fall
Over the season highs ease from about 26°C in early September to 5°C by late November.
A typical fall day in Būmahen reaches about 16°C and drops to 9°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Būmahen
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 18 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Būmahen weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -0° / -8° | 36 | 6.9 | 6.8 | 9.9 | 0.0 |
| Feb | 1° / -6° | 44 | 7.7 | 7.4 | 10.6 | 0.0 |
| Mar | 7° / -1° | 59 | 9.4 | 6.1 | 11.7 | 0.8 |
| Apr | 13° / 6° | 50 | 9.7 | 1.2 | 12.9 | 3.9 |
| May | 20° / 12° | 24 | 5.2 | 0.2 | 13.9 | 7.3 |
| Jun | 27° / 18° | 7 | 1.7 | 0 | 14.4 | 8.6 |
| Jul | 30° / 21° | 5 | 1.3 | 0 | 14.2 | 7.0 |
| Aug | 28° / 20° | 5 | 1.1 | 0 | 13.4 | 7.9 |
| Sep | 24° / 16° | 6 | 1.3 | 0 | 12.2 | 9.1 |
| Oct | 17° / 9° | 20 | 4 | 0.1 | 11.1 | 6.7 |
| Nov | 8° / 1° | 40 | 6.9 | 3.5 | 10.1 | 1.8 |
| Dec | 3° / -6° | 36 | 6.9 | 6.2 | 9.6 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 73% of the time across fall.
Chance of precipitation in Fall
Būmahen gets around 66 mm of rain and snow over 12 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early September to 9 h 48 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.5 kWh/m².
Is fall a good time to visit Būmahen?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Būmahen for sightseeing.
What to pack for Būmahen in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Būmahen sees daytime highs around 16°C and nights near 9°C. Pack a warm layer. Worth having: light clothes and sun protection. About 12 days see rain.
UV index in Būmahen in Fall
Clear-sky midday UV across fall averages 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 Būmahen peaks around July 18 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 — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 5 | 8 | 10 | 10 | 11 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | High |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 10 | Very high |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Būmahen in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Būmahen is worst in January — around 151 µg/m³ PM2.5 (very unhealthy), about 3.1× the cleanest month (July, 49 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 151 | 139 | 113 | 101 | 85 | 63 | 49 | 58 | 77 | 101 | 122 | 148 |
| Level | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 151 | Very unhealthy |
| Feb | 139 | Unhealthy |
| Mar | 113 | Unhealthy |
| Apr | 101 | Unhealthy |
| May | 85 | Unhealthy |
| Jun | 63 | Unhealthy |
| Jul | 49 | Poor |
| Aug | 58 | Unhealthy |
| Sep | 77 | Unhealthy |
| Oct | 101 | Unhealthy |
| Nov | 122 | Unhealthy |
| Dec | 148 | Unhealthy |
Where is Būmahen?
Būmahen sits at 35.7°N, 51.9°E, 1,700 m above sea level, in Iran. The nearest listed city is Rūdehen, 3.0 km away.
Topography around Būmahen
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Būmahen.
Within 3 km, the terrain around Būmahen has significant variations in elevation — a maximum elevation change of 506 m around an average of 1,761 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,393 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,353 m.
The land around Būmahen is covered by artificial surfaces (36%), grassland (30%) and bare terrain (28%) within 3 km, grassland (69%) and bare terrain (20%) within 16 km, and grassland (44%) and bare terrain (32%) within 80 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
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 Būmahen (35.7297°, 51.8688°, elevation 1,700 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.