Nowshahr weather in December

In December, Nowshahr sees average daytime highs of 14°C and overnight lows near 11°C, with 156 mm of rain across 14.8 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 13°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 Nowshahr's 10th-clearest and 4th-windiest month. For the whole year in context, see Nowshahr's year-round climate.

Daytime high
14°
9th warmest
Overnight low
11°
4th coldest
Rainfall
156 mm
14.8 wet days
Daylight
9 h 30 min
7:15 AM – 4:45 PM
Cloud cover
63%
10th clearest
Wind
10 km/h
4th windiest
Solar energy
2 kWh/m²
Travel score
3.4
out of 10

Nowshahr is city in Mazandaran 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 13°C by the end.

A typical December day in Nowshahr reaches about 14°C in the afternoon and slips back to 11°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 18°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)
11512
21512
31512
41412
51411
61411
71411
81411
91411
101411
111411
121411
131411
141411
151311
161311
171311
181310
191310
201310
211310
221310
231310
241310
251310
261310
271310
281310
291310
301310
311310

Nowshahr 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
Jan12° / 14215.20.79.82.6
Feb11° / 12314.1110.62.5
Mar13° / 10014.10.111.73.3
Apr17° / 13°6811.3012.95.1
May21° / 18°489.8013.96.6
Jun25° / 22°498.5014.57.4
Jul27° / 24°5910.8014.26.8
Aug27° / 25°6011.2013.46.6
Sep25° / 22°14814.6012.26.3
Oct22° / 19°20515.2011.15.9
Nov17° / 14°21915.80.1104.7
Dec14° / 11°15614.809.53.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53664
63565
73565
83664
93664
103664
113664
123862
133862
143862
153961
164060
174060
184159
194258
204258
214357
224456
234456
244555
254555
264456
274456
284555
294456
304456
314456

Chance of precipitation in December

Any precipitation

Nowshahr gets around 156 mm of rain over 14.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 55% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
155
254
354
454
554
654
754
854
953
1053
1152
1251
1351
1450
1549
1649
1748
1847
1946
2045
2144
2244
2343
2442
2542
2642
2742
2842
2942
3043
3143

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
184151
285141
386131
487121
589110
690100
79190
89280
99370
109460
119550
129640
139640
149730
159820
169820
179820
189910
199910
209910
219910
229910
239910
249910
2510000
2610000
2710000
2810000
2910000
3010000
3110000

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 7:03 AM to 7:21 AM, and sunset from 4:44 PM to 4:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:034:44
29.77:044:44
39.67:054:44
49.67:064:44
59.67:074:44
69.67:084:44
79.67:094:44
89.67:094:44
99.67:104:44
109.67:114:44
119.57:124:44
129.57:124:44
139.57:134:45
149.57:144:45
159.57:144:45
169.57:154:45
179.57:164:46
189.57:164:46
199.57:174:46
209.57:174:47
219.57:184:47
229.57:184:48
239.57:194:48
249.57:194:49
259.57:204:49
269.57:204:50
279.57:204:50
289.57:214:51
299.57:214:52
309.57:214:52
319.57:214:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2 kWh/m² to a high of 6.42 kWh/m² in June across the year — December's 2 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Moderate
22.0Moderate
32.0Moderate
42.0Moderate
52.0Dim
62.0Dim
72.0Dim
82.0Dim
92.0Dim
102.0Dim
112.0Dim
122.0Dim
132.0Dim
142.0Dim
152.0Dim
162.0Dim
172.0Dim
182.0Moderate
192.0Moderate
202.0Moderate
212.0Moderate
222.0Moderate
232.0Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in December

Hazard calendar for Nowshahr

In seasonPeak

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

Nowshahr's rainy season runs September–March, 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 Nowshahr?

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

3.4
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 Nowshahr.

What to pack for Nowshahr in December

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

In December, Nowshahr sees daytime highs around 14°C and nights near 11°C. Pack rain gear. Worth having: a warm layer. About 15 days see rain.

rain geara warm layer

Sea temperature near Nowshahr 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 offshore is warmest in August at about 28°C and coldest in February near 11°C.

It's comfortable for a long swim from May 21 to Nov 7 — about 5.6 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
Aug28Tropical
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec15Cool

UV index in Nowshahr 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 Nowshahr peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 17UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Nowshahr 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 Nowshahr is worst in February — around 46 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (July, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateFeb 1545 µg/m³Jul 1716 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb46Poor
Mar42Poor
Apr36Poor
May31Moderate
Jun21Moderate
Jul15Moderate
Aug20Moderate
Sep27Moderate
Oct30Moderate
Nov32Moderate
Dec36Poor
Location & terrain

Where is Nowshahr?

Nowshahr sits at 36.6°N, 51.5°E, -17 m above sea level, in Iran. The nearest listed city is Chālūs, 7.0 km away.

Topography around Nowshahr

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

Within 3 km, the terrain around Nowshahr has only modest variations in elevation — a maximum elevation change of 72 m around an average of -10 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,979 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,754 m.

The land around Nowshahr is covered by artificial surfaces (37%) and water (29%) within 3 km, water (48%) and trees (43%) within 16 km, and water (47%), grassland (25%) and trees (21%) within 80 km.

3 km
72 m
16 km
1,979 m
80 km
4,754 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Chālūs 7.0 km · Nūr 47 km · Tonekābon 59 km · Maḩmūdābād 68 km · Katālem va Sādāt Shahr 76 km · Āmol 79 km · Rāmsar 81 km · Fereydūn Kenār 91 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 Nowshahr (36.6485°, 51.4962°, elevation -17 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).