Reẕvānshahr weather in December

In December, Reẕvānshahr sees average daytime highs of 12°C and overnight lows near 9°C, with 154 mm of precipitation across 13.9 wet days and about 9.5 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 13°C in the first days to 12°C by the end. The sky is clear or mostly clear about 34% 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 24 min by month's end. Set against the rest of the year, December is Reẕvānshahr's 7th-clearest and 3rd-windiest month. For the whole year in context, see Reẕvānshahr's year-round climate.

Daytime high
12°
9th warmest
Overnight low
4th coldest
Precipitation
154 mm
13.9 wet days
Daylight
9 h 24 min
7:27 AM – 4:52 PM
Cloud cover
59%
7th clearest
Wind
9 km/h
3rd windiest
Solar energy
1.88 kWh/m²
Travel score
3.0
out of 10

Reẕvānshahr is city in Gilan 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 13°C in the first days to 12°C by the end.

A typical December day in Reẕvānshahr reaches about 12°C in the afternoon and slips back to 9°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°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)
11410
21310
31310
41310
51310
6139
7139
8139
9139
10139
11139
12129
13129
14129
15129
16128
17128
18128
19128
20128
21128
22128
23128
24128
25128
26128
27128
28128
29128
30128
31118

Reẕvānshahr weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 134145.59.72.1
Feb10° / 120135.210.61.9
Mar12° / 10914.6311.72.7
Apr15° / 12°8414.20.312.94.1
May20° / 17°5512.10146.1
Jun25° / 21°567.3014.57.7
Jul27° / 24°525.6014.37.7
Aug27° / 24°797.9013.47.2
Sep24° / 21°18713.4012.36.5
Oct21° / 17°25015.80115.6
Nov16° / 12°23515.91104.2
Dec12° / 15413.939.53.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44060
54060
63961
73961
84159
94159
104159
114159
124456
134456
144456
154654
164753
174852
184852
195050
205050
215149
225248
235248
245347
255248
265248
275248
285248
295149
305149
315050

Chance of precipitation in December

Any precipitationSnow

Reẕvānshahr gets around 154 mm of rain and snow over 13.9 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 46% and peaks near 53% on the wettest days, and about 3 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1537
2537
3537
4538
5538
6529
7529
85110
95110
105011
114911
124812
134812
144712
154612
164512
174412
184312
194212
204211
214111
224011
234010
243910
253910
26399
27399
28399
29409
30409
314110

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 (%)
1982
2982
3982
4982
5982
6991
7991
8991
9991
10991
11991
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 9 km/h in December.

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

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 24 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 7:15 AM to 7:33 AM, and sunset from 4:51 PM to 5:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:154:51
29.67:164:51
39.67:174:51
49.57:184:51
59.57:194:51
69.57:204:51
79.57:204:51
89.57:214:51
99.57:224:51
109.57:234:51
119.57:244:51
129.47:244:51
139.47:254:51
149.47:264:52
159.47:264:52
169.47:274:52
179.47:284:53
189.47:284:53
199.47:294:53
209.47:294:54
219.47:304:54
229.47:304:55
239.47:314:55
249.47:314:56
259.47:324:56
269.47:324:57
279.47:324:57
289.47:334:58
299.47:334:58
309.47:334:59
319.47:335:00

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.88 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 6.26 kWh/m² in June across the year — December's 1.88 kWh/m² sits near the bottom.

0123151015202531
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
151.9Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
221.9Dim
232.0Dim
242.0Dim
252.0Dim
262.0Dim
272.0Moderate
282.0Moderate
292.0Moderate
302.0Moderate
312.0Moderate
Planning a trip in December

Hazard calendar for Reẕvānshahr

In seasonPeak

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

Reẕvānshahr'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 Reẕvānshahr?

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

3.0
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 Reẕvānshahr.

What to pack for Reẕvānshahr in December

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

In December, Reẕvānshahr sees daytime highs around 12°C and nights near 9°C. Pack rain gear. Worth having: a warm layer. About 14 days see rain.

rain geara warm layer

Sea temperature near Reẕvānshahr in December

The nearest coast averages about 14°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 10°C.

It's comfortable for a long swim from May 22 to Nov 4 — about 5.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr13Bracing
May19Cool
Jun24Warm
Jul27Warm
Aug28Warm
Sep26Warm
Oct23Refreshing
Nov18Cool
Dec14Bracing

UV index in Reẕvānshahr 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 Reẕvānshahr peaks around July 19 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 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Moderate

Air quality in Reẕvānshahr 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 Reẕvānshahr is worst in March — around 27 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1826 µg/m³Jul 1315 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb21Moderate
Mar27Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul14Moderate
Aug20Moderate
Sep25Moderate
Oct23Moderate
Nov21Moderate
Dec20Moderate
Location & terrain

Where is Reẕvānshahr?

Reẕvānshahr sits at 37.5°N, 49.1°E, 15 m above sea level, in Iran. The nearest listed city is Māsāl, 21 km away.

Topography around Reẕvānshahr

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

Within 3 km, the terrain around Reẕvānshahr has only modest variations in elevation — a maximum elevation change of 107 m around an average of 14 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,430 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,325 m.

The land around Reẕvānshahr is covered by cropland (49%) and trees (22%) within 3 km, trees (42%), water (28%) and cropland (21%) within 16 km, and water (34%), grassland (29%) and trees (22%) within 80 km.

3 km
107 m
16 km
1,430 m
80 km
3,325 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Māsāl 21 km · Bandar-e Anzalī 30 km · Şowme‘eh Sarā 32 km · Hashtpar 34 km · Fūman 39 km · Khomām 49 km · Rasht 50 km · Khalkhāl 54 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 Reẕvānshahr (37.5495°, 49.1374°, elevation 15 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).