Rāmsar weather in December

In December, Rāmsar sees average daytime highs of 13°C and overnight lows near 11°C, with 184 mm of precipitation across 16.6 wet days and about 9.5 hours of daylight. It is the 9th-warmest and 3rd-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 27% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Rāmsar's 12th-clearest and 2nd-windiest month. For the whole year in context, see Rāmsar's year-round climate.

Daytime high
13°
9th warmest
Overnight low
11°
4th coldest
Precipitation
184 mm
16.6 wet days
Daylight
9 h 30 min
7:19 AM – 4:48 PM
Cloud cover
64%
12th clearest
Wind
13 km/h
2nd windiest
Solar energy
1.82 kWh/m²
Travel score
3.1
out of 10

Rāmsar is City in Mazandaran province, Iran.

Founded
1943

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 Rāmsar reaches about 13°C in the afternoon and slips back to 11°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 9°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)
11412
21412
31412
41412
51412
61412
71412
81412
91311
101311
111311
121311
131311
141311
151311
161311
171311
181311
191311
201311
211311
221311
231311
241311
251311
261311
271211
281210
291210
301210
311210

Rāmsar weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 1631719.82.3
Feb10° / 13014.51.710.62.1
Mar12° / 10514.50.311.72.8
Apr15° / 13°7511.8012.94.5
May20° / 17°478.8013.96.6
Jun24° / 22°436.3014.58.0
Jul26° / 24°436.5014.37.8
Aug27° / 25°527.2013.47.5
Sep24° / 22°15012.5012.36.8
Oct21° / 19°24615.70115.8
Nov17° / 14°24317.20.2104.3
Dec13° / 11°18416.60.39.53.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23763
33763
43763
53565
63565
73565
83565
93565
103565
113565
123565
133664
143763
153763
163862
174060
184159
194159
204357
214258
224357
234357
244456
254456
264357
274456
284456
294357
304357
314357

Chance of precipitation in December

Any precipitation

Rāmsar gets around 184 mm of rain and snow over 16.6 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 55% and peaks near 62% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
162
262
362
462
562
661
761
860
960
1059
1158
1258
1357
1456
1555
1655
1754
1853
1952
2051
2150
2249
2348
2448
2548
2648
2748
2848
2948
3049
3149

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
188111
290100
39190
49280
59370
69370
79460
89550
99550
109640
119640
129730
139730
149820
159820
169910
179910
189910
199910
209910
219910
229910
239910
249910
259910
269910
279910
289910
299910
3010000
3110000

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 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 12 minutes over December. Sunrise moves from 7:08 AM to 7:26 AM, and sunset from 4:47 PM to 4:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:084:47
29.67:084:47
39.67:094:47
49.67:104:46
59.67:114:46
69.67:124:46
79.67:134:46
89.57:134:46
99.57:144:47
109.57:154:47
119.57:164:47
129.57:164:47
139.57:174:47
149.57:184:47
159.57:194:48
169.57:194:48
179.57:204:48
189.57:204:49
199.57:214:49
209.57:214:49
219.57:224:50
229.57:224:50
239.57:234:51
249.57:234:51
259.57:244:52
269.57:244:52
279.57:244:53
289.57:254:54
299.57:254:54
309.57:254:55
319.57:264:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.82 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 5.94 kWh/m² in June across the year — December's 1.82 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.8Dim
61.8Dim
71.8Dim
81.8Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.8Dim
151.8Dim
161.8Dim
171.8Dim
181.8Dim
191.8Dim
201.9Dim
211.9Dim
221.9Dim
231.9Dim
241.9Dim
251.9Dim
261.9Dim
271.9Dim
281.9Dim
291.9Dim
302.0Dim
312.0Dim
Planning a trip in December

Hazard calendar for Rāmsar

In seasonPeak

In December, Rāmsar sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rāmsar's rainy season runs September–February, when most of the year's rain falls.

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

Is December a good time to visit Rāmsar?

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

3.1
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Rāmsar.

What to pack for Rāmsar in December

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

In December, Rāmsar sees daytime highs around 13°C and nights near 11°C. Pack rain gear. Worth having: a warm layer. About 17 days see rain.

rain geara warm layer

Sea temperature near Rāmsar 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 21 km away) is warmest in August at about 28°C and coldest in February near 11°C.

It's comfortable for a long swim from May 22 to Nov 5 — about 5.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar11Bracing
Apr14Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Bracing

UV index in Rāmsar 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 Rāmsar peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 17UV 9Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May9Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec3Moderate

Air quality in Rāmsar 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 Rāmsar is worst in February — around 50 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (July, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorFeb 1149 µg/m³Jul 1817 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb50Poor
Mar45Poor
Apr40Poor
May33Moderate
Jun21Moderate
Jul16Moderate
Aug20Moderate
Sep25Moderate
Oct30Moderate
Nov37Poor
Dec45Poor
Location & terrain

Where is Rāmsar?

Rāmsar sits at 36.9°N, 50.6°E, -21 m above sea level, in Iran. The nearest listed city is Katālem va Sādāt Shahr, 5.0 km away.

Topography around Rāmsar

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

Within 3 km, the terrain around Rāmsar has significant variations in elevation — a maximum elevation change of 538 m around an average of 65 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,548 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,754 m.

The land around Rāmsar is covered by trees (58%) and artificial surfaces (20%) within 3 km, trees (49%) and water (43%) within 16 km, and water (44%), grassland (28%) and trees (21%) within 80 km.

3 km
538 m
16 km
2,548 m
80 km
4,754 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Katālem va Sādāt Shahr 5.0 km · Tonekābon 23 km · Rūdsar 40 km · Amlash 45 km · Langarūd 54 km · Lāhījān 65 km · Āstāneh-ye Ashrafīyeh 73 km · Sīāhkal 74 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 Rāmsar (36.918°, 50.648°, elevation -21 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).