Gomīshān weather in December

In December, Gomīshān sees average daytime highs of 13°C and overnight lows near 10°C, with 55 mm of precipitation across 8 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 12°C by the end. The sky is clear or mostly clear about 45% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Gomīshān's 8th-clearest and 10th-windiest month. For the whole year in context, see Gomīshān's year-round climate.

Daytime high
13°
10th warmest
Overnight low
10°
3rd coldest
Precipitation
55 mm
8 wet days
Daylight
9 h 30 min
7:06 AM – 4:34 PM
Cloud cover
47%
8th clearest
Wind
11 km/h
10th windiest
Solar energy
2.22 kWh/m²
Travel score
4.0
out of 10

Gomīshān is city in Golestan Province, Iran.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 14°C in the first days to 12°C by the end.

A typical December day in Gomīshān reaches about 13°C in the afternoon and slips back to 10°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 17°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11411
21411
31411
41411
51411
61410
71410
81410
91410
101310
111310
121310
131310
141310
151310
161310
171310
18139
19139
20139
21139
22139
23139
24139
25139
26139
27139
28139
29129
30129
31129

How December really feels in Gomīshān

Once humidity and wind are folded in, December 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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Gomīshān weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan12° / 608.80.19.73.1
Feb12° / 628.80.510.63.3
Mar15° / 11°7210.5011.74.6
Apr20° / 15°538.1012.96.6
May24° / 20°305.20147.9
Jun27° / 24°203.7014.58.0
Jul29° / 26°245.1014.36.7
Aug30° / 27°204.5013.46.3
Sep28° / 24°486.9012.37.3
Oct23° / 19°686.40117.8
Nov17° / 14°828.70.2105.9
Dec13° / 10°5580.19.54.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45644
55644
65545
75545
85545
95545
105644
115644
125644
135743
145743
155743
165842
175842
186040
196040
206139
216238
226337
236436
246436
256535
266535
276535
286535
296436
306535
316436

Chance of precipitation in December

Any precipitation

Gomīshān gets around 55 mm of rain and snow over 8 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 27% and peaks near 32% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
431
531
631
730
830
930
1029
1129
1228
1328
1427
1527
1626
1726
1825
1925
2024
2124
2223
2323
2423
2522
2622
2722
2823
2923
3023
3124

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1946
2946
3955
4955
5964
6964
7973
8973
9982
10982
11991
12991
13991
14991
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 30 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 6:54 AM to 7:12 AM, and sunset from 4:33 PM to 4:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:544:33
29.66:554:32
39.66:564:32
49.66:574:32
59.66:584:32
69.66:594:32
79.56:594:32
89.57:004:32
99.57:014:32
109.57:024:33
119.57:024:33
129.57:034:33
139.57:044:33
149.57:054:33
159.57:054:34
169.57:064:34
179.57:064:34
189.57:074:35
199.57:084:35
209.57:084:35
219.57:094:36
229.57:094:36
239.57:104:37
249.57:104:37
259.57:104:38
269.57:114:38
279.57:114:39
289.57:114:39
299.57:124:40
309.57:124:41
319.57:124:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.22 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 6.42 kWh/m² in June across the year — December's 2.22 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.3Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.3Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Is December a good time to visit Gomīshān?

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

4.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a reasonable time to visit Gomīshān for sightseeing.

What to pack for Gomīshān in December

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

In December, Gomīshān sees daytime highs around 13°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 8 days see rain.

a warm layerrain gear

Sea temperature near Gomīshān in December

The nearest coast averages about 15°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in August at about 29°C and coldest in February near 11°C.

It's comfortable for a long swim from May 13 to Nov 6 — about 5.9 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar12Bracing
Apr16Cool
May21Refreshing
Jun25Warm
Jul28Warm
Aug29Tropical
Sep27Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Gomīshān in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gomīshān peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 18UV 10Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May7Very high
Jun7Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Gomīshān 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 Gomīshān is worst in September — around 29 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 2029 µg/m³Jul 1519 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb23Moderate
Mar25Moderate
Apr25Moderate
May22Moderate
Jun21Moderate
Jul19Moderate
Aug22Moderate
Sep29Moderate
Oct27Moderate
Nov25Moderate
Dec23Moderate
Location & terrain

Where is Gomīshān?

Gomīshān sits at 37.1°N, 54.1°E, -23 m above sea level, in Iran. The nearest listed city is Sīmīn Shahr, 15 km away.

Topography around Gomīshān

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

Within 3 km, the terrain around Gomīshān has only modest variations in elevation — a maximum elevation change of 5 m around an average of -25 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 13 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,837 m.

The land around Gomīshān is covered by cropland (49%) and bare terrain (31%) within 3 km, cropland (43%), bare terrain (20%) and water (20%) within 16 km, and water (29%), bare terrain (22%) and cropland (21%) within 80 km.

3 km
5 m
16 km
13 m
80 km
3,837 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Sīmīn Shahr 15 km · Bandar-e Torkaman 19 km · Kord Kūy 31 km · Āq Qalā 34 km · Bandar-e Gaz 35 km · Gorgān 41 km · Galūgāh 45 km · Fāẕelābād 63 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 Gomīshān (37.0718°, 54.0765°, elevation -23 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).