Jam weather in December

In December, Jam sees average daytime highs of 21°C and overnight lows near 16°C, with 53 mm of rain across 4.5 wet days and about 10.3 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 70% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of December to 10 h 18 min by month's end. Set against the rest of the year, December is Jam's 8th-clearest and 8th-windiest month. For the whole year in context, see Jam's year-round climate.

Daytime high
21°
10th warmest
Overnight low
16°
3rd coldest
Rainfall
53 mm
4.5 wet days
Daylight
10 h 12 min
6:49 AM – 5:04 PM
Cloud cover
28%
8th clearest
Wind
10 km/h
8th windiest
Solar energy
3.67 kWh/m²
Travel score
7.9
out of 10

Jam is city in Bushehr Province, Iran.

Founded
1996

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 22°C in the first days to 20°C by the end.

A typical December day in Jam reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12318
22318
32218
42218
52218
62217
72217
82217
92217
102217
112117
122117
132117
142117
152116
162116
172116
182116
192116
202116
212116
222016
232016
242016
252016
262015
272015
282015
292015
302015
312015

How December really feels in Jam

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.

Jam weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 14°665.610.47.2
Feb20° / 15°343.5117.7
Mar22° / 18°263.311.88.3
Apr27° / 22°50.812.68.3
May31° / 27°00.113.45.8
Jun34° / 30°0013.74.3
Jul35° / 31°0013.63.7
Aug35° / 31°10.1133.7
Sep33° / 29°0012.24.7
Oct31° / 26°10.111.36.5
Nov26° / 21°232.210.68.5
Dec21° / 16°534.510.37.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 21%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18119
28119
38119
48119
58020
68020
78020
87921
97822
107822
117822
127822
137822
147822
157822
167822
177822
187822
197921
207921
217921
227921
238020
248020
257921
268020
278020
287921
297921
307822
317723

Chance of precipitation in December

Any precipitation

Jam gets around 53 mm of rain over 4.5 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 15% and peaks near 17% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
115
215
316
416
516
616
717
817
917
1017
1117
1217
1316
1416
1516
1615
1715
1814
1914
2013
2113
2213
2312
2412
2512
2612
2712
2812
2913
3013
3114

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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1553312
2563212
3573211
4583111
5593011
6602911
7612811
8612811
9632710
10642610
1166259
1267249
1369238
1470237
1571227
1673216
1773216
1874215
1974215
2074215
2175214
2275214
2375214
2474224
2575223
2675223
2774233
2874233
2974233
3073243
3174242

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 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
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 24 min at the start of December to 10 h 18 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 6:40 AM to 6:56 AM, and sunset from 5:01 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.46:405:01
210.46:405:01
310.36:415:01
410.36:425:02
510.36:425:02
610.36:435:02
710.36:445:02
810.36:445:02
910.36:455:02
1010.36:465:02
1110.36:465:03
1210.36:475:03
1310.36:485:03
1410.36:485:04
1510.36:495:04
1610.26:495:04
1710.26:505:05
1810.26:515:05
1910.26:515:05
2010.26:525:06
2110.26:525:06
2210.26:535:07
2310.26:535:07
2410.26:545:08
2510.26:545:08
2610.26:545:09
2710.26:555:09
2810.26:555:10
2910.36:555:10
3010.36:565:11
3110.36:565:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.67 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.67 kWh/m² to a high of 7.68 kWh/m² in June across the year — December's 3.67 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
313.6Moderate
Planning a trip in December

Hazard calendar for Jam

In seasonPeak

None of Jam's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Jam sees seasonal dust haze (March–May), heaviest in April.

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

Is December a good time to visit Jam?

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

7.9
Sightseeing
4th-best month of the year
4.8
Beach & pool
10th-best month of the year

December is one of the better times to visit Jam for general sightseeing.

What to pack for Jam in December

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

In December, Jam sees daytime highs around 21°C and nights near 16°C. Little to plan around — just the basics. About 5 days see rain.

Sea temperature near Jam in December

The nearest coast averages about 25°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 23 km away) is warmest in August at about 34°C and coldest in February near 22°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb22Refreshing
Mar22Refreshing
Apr24Refreshing
May27Warm
Jun30Tropical
Jul32Tropical
Aug34Tropical
Sep33Tropical
Oct31Tropical
Nov28Tropical
Dec25Warm

UV index in Jam in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jam peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highHighVery highExtremeVery highHighModerateJun 18UV 11Dec 23UV 4
UV index (midday)Level
Jan4Moderate
Feb7Very high
Mar8Very high
Apr6High
May9Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep7High
Oct7Very high
Nov5High
Dec4Moderate

Air quality in Jam 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 Jam is worst in July — around 56 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (November, 26 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1854 µg/m³Nov 2326 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb32Moderate
Mar37Poor
Apr41Poor
May45Poor
Jun42Poor
Jul56Unhealthy
Aug46Poor
Sep39Poor
Oct34Moderate
Nov26Moderate
Dec27Moderate
Location & terrain

Where is Jam?

Jam sits at 27.8°N, 52.3°E, 622 m above sea level, in Iran. The nearest listed city is Makū, 10 km away.

Khonj

Topography around Jam

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

Within 3 km, the terrain around Jam has only modest variations in elevation — a maximum elevation change of 166 m around an average of 652 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,518 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,093 m.

The land around Jam is covered by bare terrain (44%) and artificial surfaces (32%) within 3 km, bare terrain (79%) within 16 km, and bare terrain (64%) and water (25%) within 80 km.

3 km
166 m
16 km
1,518 m
80 km
2,093 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Makū 10 km · Bandar-e Kangān 26 km · Bandar-e Deyr 38 km · Nakhl-e Taqī 45 km · Pārsiān 98 km · Qīr 101 km · Lamerd 101 km · Khonj 109 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 Jam (27.8298°, 52.3252°, elevation 622 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).