Īstgāh-e Rāh Āhan-e Garmsār weather in December

In December, Īstgāh-e Rāh Āhan-e Garmsār sees average daytime highs of 11°C and overnight lows near 2°C, with 22 mm of precipitation across 5.3 wet days and about 9.7 hours of daylight. It is the 11th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 10°C by the end. The sky is clear or mostly clear about 59% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of December to 9 h 42 min by month's end. Set against the rest of the year, December is Īstgāh-e Rāh Āhan-e Garmsār's 9th-clearest and 12th-windiest month. For the whole year in context, see Īstgāh-e Rāh Āhan-e Garmsār's year-round climate.

Daytime high
11°
11th warmest
Overnight low
2nd coldest
Precipitation
22 mm
5.3 wet days
Daylight
9 h 36 min
7:08 AM – 4:46 PM
Cloud cover
37%
9th clearest
Wind
6 km/h
12th windiest
Solar energy
2.81 kWh/m²
Travel score
3.1
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 12°C in the first days to 10°C by the end.

A typical December day in Īstgāh-e Rāh Āhan-e Garmsār reaches about 11°C in the afternoon and slips back to 2°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 15°C. Set against its neighbours, December runs about 6°C cooler than November and about 1°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1124
2123
3123
4123
5123
6123
7113
8113
9113
10112
11112
12112
13112
14112
15112
16112
17112
18112
19112
20102
21101
22101
23101
24101
25101
26101
27101
28101
29101
30101
31101

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

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 16 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
16
wind chill below the day's low

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

Īstgāh-e Rāh Āhan-e Garmsār weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 4th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37030
47030
56931
66931
76931
86931
96931
107030
117129
127129
137129
147228
157327
167327
177426
187426
197426
207525
217525
227525
237624
247624
257624
267624
277624
287624
297525
307525
317525

Chance of precipitation in December

Any precipitationSnow

Īstgāh-e Rāh Āhan-e Garmsār gets around 22 mm of rain and snow over 5.3 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 17% and peaks near 20% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1191
2201
3201
4201
5201
6201
7201
8201
9201
10191
11191
12191
13181
14181
15172
16172
17172
18162
19162
20162
21152
22152
23141
24141
25142
26132
27132
28132
29132
30132
31142

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 December

Winds average 6 km/h in December, the calmest month.

Across December, 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
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:57 AM to 7:14 AM, and sunset from 4:44 PM to 4:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:574:44
29.86:574:44
39.86:584:44
49.86:594:44
59.77:004:44
69.77:014:44
79.77:024:44
89.77:024:44
99.77:034:44
109.77:044:45
119.77:054:45
129.77:054:45
139.77:064:45
149.67:074:45
159.67:074:46
169.67:084:46
179.67:084:46
189.67:094:47
199.67:104:47
209.67:104:48
219.67:114:48
229.67:114:48
239.67:124:49
249.67:124:49
259.67:124:50
269.67:134:50
279.67:134:51
289.67:134:52
299.67:144:52
309.67:144:53
319.77:144:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.81 kWh/m² — the year's lowest.

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 — December's 2.81 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.9Moderate
22.9Moderate
32.9Moderate
42.8Moderate
52.8Moderate
62.8Moderate
72.8Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

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

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

3.1
Sightseeing
8th-best month of the year
0.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Īstgāh-e Rāh Āhan-e Garmsār.

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

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

In December, Īstgāh-e Rāh Āhan-e Garmsār sees daytime highs around 11°C and nights near 2°C. Pack a warm layer. About 5 days see rain.

a warm layer

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

LowModerateHighVery highExtreme

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

GoodModeratePoorUnhealthyVery unhealthy

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