Golestān weather in December

In December, Golestān sees average daytime highs of 10°C and overnight lows near 1°C, with 45 mm of precipitation across 7.9 wet days and about 9.6 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 11°C in the first days to 9°C by the end. The sky is clear or mostly clear about 55% 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 36 min by month's end. Set against the rest of the year, December is Golestān's 10th-clearest and 12th-windiest month. For the whole year in context, see Golestān's year-round climate.

Daytime high: 10°; 11th warmest
Overnight low: 1°; 3rd coldest
Precipitation: 45 mm; 7.9 wet days
Daylight: 9 h 36 min; 7:13 AM – 4:50 PM
Cloud cover: 40%; 10th clearest
Wind: 6 km/h; 12th windiest
Solar energy: 2.71 kWh/m²
Travel score: 2.6; out of 10

Golestān is city in Tehran Province, Iran.

Founded: 1996

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

← November Golestān year-round climate January →Best places to visit in December

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 11°C in the first days to 9°C by the end.

A typical December day in Golestān reaches about 10°C in the afternoon and slips back to 1°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 2°C warmer than January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	12	12	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	9	9	9	9
Avg low (°C)	3	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	2
3	11	2
4	11	2
5	11	2
6	11	2
7	11	2
8	11	2
9	11	2
10	10	1
11	10	1
12	10	1
13	10	1
14	10	1
15	10	1
16	10	1
17	10	1
18	10	1
19	10	1
20	10	0
21	10	0
22	10	0
23	10	0
24	10	0
25	10	0
26	10	0
27	10	0
28	9	0
29	9	0
30	9	0
31	9	0

How December really feels in Golestān

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 24 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Golestān weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	9° / -1°	42	7.9	2.7	9.9	1.8
Feb	11° / 1°	42	7.9	1.4	10.7	3.0
Mar	16° / 5°	54	9.3	0.6	11.7	5.5
Apr	23° / 11°	42	7.2	0	12.9	7.3
May	29° / 17°	16	3.2	0	13.8	6.5
Jun	35° / 22°	3	0.7	0	14.4	3.1
Jul	38° / 25°	2	0.3	0	14.2	1.4
Aug	37° / 24°	1	0.2	0	13.3	2.2
Sep	32° / 19°	1	0.4	0	12.2	5.2
Oct	25° / 13°	16	3	0	11.1	8.3
Nov	16° / 6°	43	6.9	0.3	10.1	5.5
Dec	10° / 1°	45	7.9	1.1	9.6	2.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 33%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	65	65	64	63	62	62	62	62	62	62	62	63	64	64	64	65	67	67	68	68	70	70	70	72	72	72	72	71	71	71	71
Cloudier (%)	35	35	36	37	38	38	38	38	38	38	38	37	36	36	36	35	33	33	32	32	30	30	30	28	28	28	28	29	29	29	29

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	64	36
4	63	37
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	62	38
12	63	37
13	64	36
14	64	36
15	64	36
16	65	35
17	67	33
18	67	33
19	68	32
20	68	32
21	70	30
22	70	30
23	70	30
24	72	28
25	72	28
26	72	28
27	72	28
28	71	29
29	71	29
30	71	29
31	71	29

Chance of precipitation in December

Any precipitationSnow

Golestān gets around 45 mm of rain and snow over 7.9 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 26% and peaks near 29% on the wettest days, and about 1 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	26	27	27	27	27	28	28	28	28	28	29	28	28	28	28	28	27	27	26	25	25	24	23	23	23	22	22	22	22	23	23
Snow chance (%)	2	2	2	3	3	3	3	4	4	4	4	4	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	5	5	6

	Rain chance (%)	Snow chance (%)
1	26	2
2	27	2
3	27	2
4	27	3
5	27	3
6	28	3
7	28	3
8	28	4
9	28	4
10	28	4
11	29	4
12	28	4
13	28	5
14	28	5
15	28	5
16	28	5
17	27	5
18	27	4
19	26	4
20	25	4
21	25	4
22	24	4
23	23	4
24	23	4
25	23	4
26	22	4
27	22	4
28	22	4
29	22	5
30	23	5
31	23	6

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:02 AM to 7:20 AM, and sunset from 4:48 PM to 4:57 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.8	9.8	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6
Sunrise (AM)	7:02	7:03	7:04	7:04	7:05	7:06	7:07	7:08	7:08	7:09	7:10	7:10	7:11	7:12	7:12	7:13	7:14	7:14	7:15	7:15	7:16	7:16	7:17	7:17	7:18	7:18	7:18	7:19	7:19	7:19	7:20
Sunset (PM)	4:48	4:48	4:48	4:48	4:48	4:48	4:48	4:48	4:48	4:48	4:49	4:49	4:49	4:49	4:49	4:50	4:50	4:50	4:51	4:51	4:52	4:52	4:53	4:53	4:54	4:54	4:55	4:55	4:56	4:57	4:57

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.8	7:02	4:48
2	9.8	7:03	4:48
3	9.7	7:04	4:48
4	9.7	7:04	4:48
5	9.7	7:05	4:48
6	9.7	7:06	4:48
7	9.7	7:07	4:48
8	9.7	7:08	4:48
9	9.7	7:08	4:48
10	9.7	7:09	4:48
11	9.6	7:10	4:49
12	9.6	7:10	4:49
13	9.6	7:11	4:49
14	9.6	7:12	4:49
15	9.6	7:12	4:49
16	9.6	7:13	4:50
17	9.6	7:14	4:50
18	9.6	7:14	4:50
19	9.6	7:15	4:51
20	9.6	7:15	4:51
21	9.6	7:16	4:52
22	9.6	7:16	4:52
23	9.6	7:17	4:53
24	9.6	7:17	4:53
25	9.6	7:18	4:54
26	9.6	7:18	4:54
27	9.6	7:18	4:55
28	9.6	7:19	4:55
29	9.6	7:19	4:56
30	9.6	7:19	4:57
31	9.6	7:20	4:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.71 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.71 kWh/m² to a high of 7.83 kWh/m² in June across the year — December's 2.71 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	2.8	2.8	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.8	Moderate
2	2.8	Moderate
3	2.7	Moderate
4	2.7	Moderate
5	2.7	Moderate
6	2.7	Moderate
7	2.7	Moderate
8	2.7	Moderate
9	2.7	Moderate
10	2.7	Moderate
11	2.7	Moderate
12	2.7	Moderate
13	2.7	Moderate
14	2.7	Moderate
15	2.7	Moderate
16	2.7	Moderate
17	2.7	Moderate
18	2.7	Moderate
19	2.7	Moderate
20	2.7	Moderate
21	2.8	Moderate
22	2.8	Moderate
23	2.8	Moderate
24	2.8	Moderate
25	2.8	Moderate
26	2.8	Moderate
27	2.8	Moderate
28	2.8	Moderate
29	2.8	Moderate
30	2.8	Moderate
31	2.8	Moderate

Planning a trip in December

Is December a good time to visit Golestān?

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

2.6

Sightseeing

9th-best month of the year

0.0

Beach & pool

11th-best month of the year

December is a weaker month for outdoor sightseeing in Golestān.

What to pack for Golestān in December

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

In December, Golestān sees daytime highs around 10°C and nights near 1°C. Pack a warm layer. About 8 days see rain.

a warm layer

UV index in Golestān 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 Golestān peaks around July 16 at about 10 (very high) — 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	5	5	7	9	10	10	9	7	5	3	3
Level	Moderate	Moderate	Moderate	Very high	Very high	Very high	Very high	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	5	Moderate
Apr	7	Very high
May	9	Very high
Jun	10	Very high
Jul	10	Very high
Aug	9	Very high
Sep	7	Very high
Oct	5	High
Nov	3	Moderate
Dec	3	Moderate

Air quality in Golestān 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 Golestān is worst in December — around 211 µg/m³ PM2.5 (very unhealthy), about 4.0× the cleanest month (July, 53 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)	204	172	124	110	88	66	53	58	80	117	174	211
Level	Very unhealthy	Very unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Poor	Unhealthy	Unhealthy	Unhealthy	Very unhealthy	Very unhealthy

	PM2.5 (µg/m³)	Level
Jan	204	Very unhealthy
Feb	172	Very unhealthy
Mar	124	Unhealthy
Apr	110	Unhealthy
May	88	Unhealthy
Jun	66	Unhealthy
Jul	53	Poor
Aug	58	Unhealthy
Sep	80	Unhealthy
Oct	117	Unhealthy
Nov	174	Very unhealthy
Dec	211	Very unhealthy

Location & terrain

Where is Golestān?

Golestān sits at 35.5°N, 51.2°E, 1,042 m above sea level, in Iran. The nearest listed city is Ṣāleḥīeh, 2.0 km away.

Topography around Golestān

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

Within 3 km, the terrain around Golestān has only modest variations in elevation — a maximum elevation change of 41 m around an average of 1,044 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 287 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,558 m.

The land around Golestān is covered by artificial surfaces (55%) and bare terrain (23%) within 3 km, bare terrain (36%), cropland (29%) and artificial surfaces (23%) within 16 km, and bare terrain (51%) and grassland (25%) within 80 km.

3 km

41 m

artificial surfaces 55%

16 km

287 m

bare terrain 36%

80 km

3,558 m

bare terrain 51%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← November Golestān year-round climate January →Best places to visit in December

December weather nearby: Ṣāleḥīeh 2.0 km · Khabarābād 4.0 km · Nasirshahr 5.0 km · Nasīm Shahr 5.0 km · Nasimshahr 6.0 km · Ovrīn 6.0 km · Eslamshahr 6.0 km · Şabbāshahr 9.0 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 Golestān (35.5183°, 51.1819°, elevation 1,042 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).

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	2
3	11	2
4	11	2
5	11	2
6	11	2
7	11	2
8	11	2
9	11	2
10	10	1
11	10	1
12	10	1
13	10	1
14	10	1
15	10	1
16	10	1
17	10	1
18	10	1
19	10	1
20	10	0
21	10	0
22	10	0
23	10	0
24	10	0
25	10	0
26	10	0
27	10	0
28	9	0
29	9	0
30	9	0
31	9	0

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	64	36
4	63	37
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	62	38
12	63	37
13	64	36
14	64	36
15	64	36
16	65	35
17	67	33
18	67	33
19	68	32
20	68	32
21	70	30
22	70	30
23	70	30
24	72	28
25	72	28
26	72	28
27	72	28
28	71	29
29	71	29
30	71	29
31	71	29

	Rain chance (%)	Snow chance (%)
1	26	2
2	27	2
3	27	2
4	27	3
5	27	3
6	28	3
7	28	3
8	28	4
9	28	4
10	28	4
11	29	4
12	28	4
13	28	5
14	28	5
15	28	5
16	28	5
17	27	5
18	27	4
19	26	4
20	25	4
21	25	4
22	24	4
23	23	4
24	23	4
25	23	4
26	22	4
27	22	4
28	22	4
29	22	5
30	23	5
31	23	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	2
3	11	2
4	11	2
5	11	2
6	11	2
7	11	2
8	11	2
9	11	2
10	10	1
11	10	1
12	10	1
13	10	1
14	10	1
15	10	1
16	10	1
17	10	1
18	10	1
19	10	1
20	10	0
21	10	0
22	10	0
23	10	0
24	10	0
25	10	0
26	10	0
27	10	0
28	9	0
29	9	0
30	9	0
31	9	0

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	64	36
4	63	37
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	62	38
12	63	37
13	64	36
14	64	36
15	64	36
16	65	35
17	67	33
18	67	33
19	68	32
20	68	32
21	70	30
22	70	30
23	70	30
24	72	28
25	72	28
26	72	28
27	72	28
28	71	29
29	71	29
30	71	29
31	71	29

	Rain chance (%)	Snow chance (%)
1	26	2
2	27	2
3	27	2
4	27	3
5	27	3
6	28	3
7	28	3
8	28	4
9	28	4
10	28	4
11	29	4
12	28	4
13	28	5
14	28	5
15	28	5
16	28	5
17	27	5
18	27	4
19	26	4
20	25	4
21	25	4
22	24	4
23	23	4
24	23	4
25	23	4
26	22	4
27	22	4
28	22	4
29	22	5
30	23	5
31	23	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	2
3	11	2
4	11	2
5	11	2
6	11	2
7	11	2
8	11	2
9	11	2
10	10	1
11	10	1
12	10	1
13	10	1
14	10	1
15	10	1
16	10	1
17	10	1
18	10	1
19	10	1
20	10	0
21	10	0
22	10	0
23	10	0
24	10	0
25	10	0
26	10	0
27	10	0
28	9	0
29	9	0
30	9	0
31	9	0

	Clearer (%)	Cloudier (%)
1	65	35
2	65	35
3	64	36
4	63	37
5	62	38
6	62	38
7	62	38
8	62	38
9	62	38
10	62	38
11	62	38
12	63	37
13	64	36
14	64	36
15	64	36
16	65	35
17	67	33
18	67	33
19	68	32
20	68	32
21	70	30
22	70	30
23	70	30
24	72	28
25	72	28
26	72	28
27	72	28
28	71	29
29	71	29
30	71	29
31	71	29

	Rain chance (%)	Snow chance (%)
1	26	2
2	27	2
3	27	2
4	27	3
5	27	3
6	28	3
7	28	3
8	28	4
9	28	4
10	28	4
11	29	4
12	28	4
13	28	5
14	28	5
15	28	5
16	28	5
17	27	5
18	27	4
19	26	4
20	25	4
21	25	4
22	24	4
23	23	4
24	23	4
25	23	4
26	22	4
27	22	4
28	22	4
29	22	5
30	23	5
31	23	6

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100