Būmahen weather in January

In January, Būmahen sees average daytime highs of -0°C and overnight lows near -8°C, with 36 mm of precipitation across 6.9 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near -0°C through the month. The sky is clear or mostly clear about 57% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Būmahen's 7th-clearest and 6th-windiest month. For the whole year in context, see Būmahen's year-round climate.

Daytime high
-0°
12th warmest
Overnight low
-8°
1st coldest
Precipitation
36 mm
6.9 wet days
Daylight
9 h 48 min
7:17 AM – 5:07 PM
Cloud cover
40%
7th clearest
Wind
7 km/h
6th windiest
Solar energy
3.42 kWh/m²
Travel score
0.0
out of 10

Būmahen is city in Tehran Province, Iran.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near -0°C through the month.

A typical January day in Būmahen reaches about -0°C in the afternoon and slips back to -8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between -5°C and 5°C. Set against its neighbours, January runs about 3°C cooler than December and about 2°C cooler than February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
11-7
21-7
31-7
41-7
51-7
61-8
70-8
80-8
90-8
100-8
110-8
120-8
130-8
140-8
150-8
16-1-8
17-1-8
18-1-9
19-1-9
20-1-8
21-1-8
22-1-8
230-8
240-8
250-8
260-8
270-8
280-8
290-8
300-8
310-8

How January really feels in Būmahen

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 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
31
31 feel bitter (≤ -10°C)

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Būmahen weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -8°366.96.89.90.0
Feb / -6°447.77.410.60.0
Mar / -1°599.46.111.70.8
Apr13° / 509.71.212.93.9
May20° / 12°245.20.213.97.3
Jun27° / 18°71.7014.48.6
Jul30° / 21°51.3014.27.0
Aug28° / 20°51.1013.47.9
Sep24° / 16°61.3012.29.1
Oct17° / 2040.111.16.7
Nov / 406.93.510.11.8
Dec / -6°366.96.29.60.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 30%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47030
57030
67030
77030
87030
97030
107030
117030
127129
137129
147129
157129
167129
177129
187228
197129
207129
217030
227030
236931
247030
256931
266931
276832
286931
296832
306832
316832

Chance of precipitation in January

Any precipitationSnow

Būmahen gets around 36 mm of rain and snow over 6.9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 22% and peaks near 26% on the wettest days, and about 7 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12019
22019
32119
42120
52120
62121
72221
82221
92121
102121
112121
122121
132020
142020
152020
161920
171920
181920
192020
202021
212021
222122
232222
242223
252324
262425
272425
282526
292627
302627
312627

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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%151015202531
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
31100

Wind in January

Winds average 7 km/h in January.

Across January, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 36 min at the start of January to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:17 AM to 7:10 AM, and sunset from 4:54 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:174:54
29.67:174:55
39.67:174:56
49.67:184:56
59.77:184:57
69.77:184:58
79.77:184:59
89.77:185:00
99.77:185:00
109.77:185:01
119.77:185:02
129.87:185:03
139.87:185:04
149.87:175:05
159.87:175:06
169.87:175:07
179.87:175:08
189.97:165:09
199.97:165:09
209.97:165:10
219.97:155:11
2210.07:155:12
2310.07:155:13
2410.07:145:14
2510.07:145:15
2610.17:135:16
2710.17:135:17
2810.17:125:18
2910.17:125:19
3010.27:115:20
3110.27:105:21

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.42 kWh/m².

For context, solar energy here swings from a low near 2.94 kWh/m² to a high of 7.6 kWh/m² in June across the year — January's 3.42 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.2Moderate
73.2Moderate
83.2Moderate
93.2Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.9Moderate
313.9Moderate
Planning a trip in January

Is January a good time to visit Būmahen?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Būmahen.

What to pack for Būmahen in January

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

In January, Būmahen sees daytime highs around -0°C and nights near -8°C. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Būmahen in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 18UV 11Jan 10UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5High
Apr8Very high
May10Very high
Jun10Very high
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Būmahen in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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).

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJan 12150 µg/m³Jul 1850 µg/m³
PM2.5 (µg/m³)Level
Jan151Very unhealthy
Feb139Unhealthy
Mar113Unhealthy
Apr101Unhealthy
May85Unhealthy
Jun63Unhealthy
Jul49Poor
Aug58Unhealthy
Sep77Unhealthy
Oct101Unhealthy
Nov122Unhealthy
Dec148Unhealthy
Location & terrain

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.

3 km
506 m
16 km
2,393 m
80 km
5,353 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
January weather nearby: Rūdehen 3.0 km · Pardīs 5.0 km · Damāvand 18 km · Lavāsān 23 km · Qīāmdasht 30 km · Mojtame‘-e Maskūnī-ye Nāmjū 31 km · Ferūnābād 33 km · Pākdasht 33 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 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. 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).