Grombalia weather in December

In December, Grombalia sees average daytime highs of 17°C and overnight lows near 10°C, with 39 mm of rain across 6.8 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 16°C by the end. The sky is clear or mostly clear about 42% 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 Grombalia's 10th-clearest and 4th-windiest month. For the whole year in context, see Grombalia's year-round climate.

Daytime high
17°
10th warmest
Overnight low
10°
4th coldest
Rainfall
39 mm
6.8 wet days
Daylight
9 h 30 min
7:29 AM – 4:59 PM
Cloud cover
49%
10th clearest
Wind
13 km/h
4th windiest
Solar energy
2.32 kWh/m²
Travel score
5.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 16°C by the end.

A typical December day in Grombalia reaches about 17°C in the afternoon and slips back to 10°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 19°C. Set against its neighbours, December runs about 4°C cooler than November and about 1°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11812
21812
31811
41811
51711
61711
71711
81711
91711
101711
111711
121711
131711
141711
151710
161710
171610
181610
191610
201610
211610
221610
231610
241610
251610
261610
271610
281610
291610
301610
31169

How December really feels in Grombalia

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.

Grombalia weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 396.79.85.2
Feb16° / 387.410.65.2
Mar18° / 10°427.111.76.3
Apr20° / 13°38712.97.0
May24° / 16°203.813.98.2
Jun28° / 19°101.814.57.7
Jul31° / 22°20.214.26.2
Aug31° / 23°81.713.45.7
Sep28° / 21°425.412.26.8
Oct25° / 18°506.911.17.5
Nov20° / 14°426.4107.0
Dec17° / 10°396.89.55.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46436
56535
66535
76634
86634
96634
106634
116634
126634
136634
146634
156634
166634
176634
186634
196634
206634
216634
226535
236535
246535
256634
266634
276634
286634
296733
306733
316733

Chance of precipitation in December

Any precipitation

Grombalia gets around 39 mm of rain over 6.8 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 21% and peaks near 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
422
522
622
722
822
922
1022
1122
1222
1322
1422
1522
1622
1722
1822
1922
2022
2122
2222
2322
2422
2521
2621
2720
2819
2919
3018
3118

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
186131
287121
388111
489101
59091
69091
79280
89370
99370
109460
119460
129460
139460
149460
159550
169550
179550
189550
199550
209640
219640
229640
239640
249730
259730
269730
279820
289820
299820
309910
319910

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

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light 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 7:17 AM to 7:35 AM, and sunset from 4:58 PM to 5:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:174:58
29.77:184:58
39.67:194:58
49.67:204:58
59.67:214:58
69.67:224:58
79.67:224:58
89.67:234:58
99.67:244:58
109.67:254:58
119.57:254:58
129.57:264:58
139.57:274:59
149.57:284:59
159.57:284:59
169.57:294:59
179.57:295:00
189.57:305:00
199.57:315:01
209.57:315:01
219.57:325:01
229.57:325:02
239.57:335:02
249.57:335:03
259.57:335:03
269.57:345:04
279.57:345:05
289.57:345:05
299.57:355:06
309.57:355:06
319.57:355:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.32 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 7.6 kWh/m² in July across the year — December's 2.32 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.4Moderate
282.4Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in December

Hazard calendar for Grombalia

In seasonPeak

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

Grombalia sees seasonal dust haze (June), heaviest in June.

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

Is December a good time to visit Grombalia?

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

5.9
Sightseeing
9th-best month of the year
1.2
Beach & pool
10th-best month of the year

December is a reasonable time to visit Grombalia for sightseeing.

What to pack for Grombalia in December

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

In December, Grombalia sees daytime highs around 17°C and nights near 10°C. Worth packing: a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Grombalia in December

The nearest coast averages about 18°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 27 km away) is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 30 to Nov 25 — about 5.9 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Grombalia 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 Grombalia peaks around July 16 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighHighVery highVery highHighModerateJul 16UV 10Dec 21UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr4Moderate
May7High
Jun9Very high
Jul10Extreme
Aug8Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Grombalia 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 Grombalia is worst in February — around 38 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (August, 24 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorFeb 1638 µg/m³Aug 1024 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb38Poor
Mar36Poor
Apr33Moderate
May29Moderate
Jun25Moderate
Jul24Moderate
Aug24Moderate
Sep27Moderate
Oct31Moderate
Nov34Moderate
Dec37Poor
Location & terrain

Where is Grombalia?

Grombalia sits at 36.6°N, 10.5°E, 50 m above sea level, in Tunisia. The nearest listed city is Beni Khalled, 10 km away.

Topography around Grombalia

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

Within 3 km, the terrain around Grombalia has only modest variations in elevation — a maximum elevation change of 72 m around an average of 48 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 754 m; within 80 km, large variations in elevation — a maximum elevation change of 1,190 m.

The land around Grombalia is covered by grassland (36%) and cropland (33%) within 3 km, grassland (41%) and trees (28%) within 16 km, and water (42%), cropland (26%) and grassland (20%) within 80 km.

3 km
72 m
16 km
754 m
80 km
1,190 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Beni Khalled 10 km · Soliman 11 km · Mennzel Bou Zelfa 12 km · Borj Cedria 15 km · Hammam-Lif 20 km · La Sebala du Mornag 21 km · Takelsa 24 km · Ez Zahra 24 km

Tunisia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$4,657
2025
Happiness
4.8 / 10
World Happiness, 2025
Safe drinking water
65%
of population, 2024
Homicide rate
4.7
per 100k, 2020
Road deaths
16.5
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 498
Religion
Muslim 99%

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 Grombalia (36.5989°, 10.5003°, elevation 50 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).