Rosetta weather in December

In December, Rosetta sees average daytime highs of 19°C and overnight lows near 15°C, with 36 mm of rain across 6.4 wet days and about 10 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 18°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 06 min at the start of December to 10 hours by month's end. Set against the rest of the year, December is Rosetta's 11th-clearest and 4th-windiest month. For the whole year in context, see Rosetta's year-round climate.

Daytime high
19°
9th warmest
Overnight low
15°
4th coldest
Rainfall
36 mm
6.4 wet days
Daylight
10 hours
6:56 AM – 4:53 PM
Cloud cover
44%
11th clearest
Wind
17 km/h
4th windiest
Solar energy
2.85 kWh/m²
Travel score
6.9
out of 10

Rosetta is city in Egypt.

Founded
~850 CE

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 20°C in the first days to 18°C by the end.

A typical December day in Rosetta reaches about 19°C in the afternoon and slips back to 15°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 21°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12117
22017
32017
42017
52016
62016
72016
82016
92016
101916
111916
121916
131916
141915
151915
161915
171915
181915
191915
201815
211815
221815
231815
241815
251814
261814
271814
281814
291814
301814
311814

Rosetta weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan17° / 13°447.510.26.1
Feb17° / 13°275.110.96.5
Mar19° / 14°152.611.87.6
Apr21° / 16°41.112.78.4
May23° / 19°10.213.69.3
Jun26° / 22°00149.3
Jul28° / 25°0013.88.7
Aug29° / 25°0013.18.0
Sep28° / 24°10.112.28.7
Oct26° / 22°71.411.28.8
Nov22° / 19°243.710.48.1
Dec19° / 15°366.4106.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% 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 29%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47129
57129
67030
77030
87030
97129
107129
117129
127129
137129
147129
157129
167129
177129
187129
197030
207129
217129
227129
237030
247129
257129
267129
277129
287228
297228
307228
317327

Chance of precipitation in December

Any precipitation

Rosetta gets around 36 mm of rain over 6.4 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 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
219
319
420
520
620
721
821
921
1021
1121
1221
1321
1421
1520
1620
1720
1820
1920
2020
2120
2220
2320
2420
2521
2621
2722
2822
2923
3023
3124

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1563581
2583471
3613261
4643051
5672850
6702640
7722440
8752230
9772030
10791920
11811720
12821620
13831520
14851410
15851410
16861310
17861310
18871210
19871210
20871210
21881110
22881110
23881110
24881110
25881110
26891010
27891010
2890910
2990910
3091810
3191810

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 06 min at the start of December to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:45 AM to 7:02 AM, and sunset from 4:51 PM to 5:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.16:454:51
210.16:464:51
310.16:474:51
410.16:474:51
510.16:484:51
610.06:494:51
710.06:504:51
810.06:504:52
910.06:514:52
1010.06:524:52
1110.06:524:52
1210.06:534:52
1310.06:544:53
1410.06:544:53
1510.06:554:53
1610.06:564:53
1710.06:564:54
1810.06:574:54
1910.06:574:55
2010.06:584:55
2110.06:584:55
2210.06:594:56
2310.06:594:56
2410.07:004:57
2510.07:004:57
2610.07:004:58
2710.07:014:59
2810.07:014:59
2910.07:015:00
3010.07:025:00
3110.07:025:01

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.85 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 7.85 kWh/m² in June across the year — December's 2.85 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
43.0Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.9Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

Hazard calendar for Rosetta

In seasonPeak

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

Rosetta sees seasonal dust haze (May), heaviest in May.

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

Is December a good time to visit Rosetta?

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

6.9
Sightseeing
10th-best month of the year
2.9
Beach & pool
10th-best month of the year

December is a reasonable time to visit Rosetta for sightseeing.

What to pack for Rosetta in December

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

In December, Rosetta sees daytime highs around 19°C and nights near 15°C. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Rosetta in December

The nearest coast averages about 20°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 17°C.

It's comfortable for a long swim from Apr 30 to Dec 18 — about 7.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar17Cool
Apr19Cool
May21Refreshing
Jun24Warm
Jul27Warm
Aug28Warm
Sep27Warm
Oct26Warm
Nov23Refreshing
Dec20Refreshing

UV index in Rosetta in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosetta peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 20UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Rosetta 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 Rosetta is worst in January — around 52 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (July, 20 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1651 µg/m³Jul 2020 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb47Poor
Mar39Poor
Apr33Moderate
May29Moderate
Jun23Moderate
Jul20Moderate
Aug21Moderate
Sep22Moderate
Oct29Moderate
Nov44Poor
Dec47Poor
Location & terrain

Where is Rosetta?

Rosetta sits at 31.4°N, 30.4°E, 15 m above sea level, in Egypt. The nearest listed city is Idkū, 15 km away.

Topography around Rosetta

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

Within 3 km, the terrain around Rosetta has only modest variations in elevation — a maximum elevation change of 21 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 30 m; within 80 km, only modest variations in elevation — a maximum elevation change of 54 m.

The land around Rosetta is covered by trees (34%), cropland (26%) and artificial surfaces (21%) within 3 km, water (42%) and cropland (21%) within 16 km, and cropland (45%) and water (41%) within 80 km.

3 km
21 m
16 km
30 m
80 km
54 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Idkū 15 km · Muţūbas 15 km · Fuwwah 25 km · Al Maḩmūdīyah 26 km · Abū Qīr 35 km · Abū Ḩummuş 35 km · Disūq 37 km · ‘Izbat ‘Alī as Sayyid 37 km

Egypt travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 15% of US
price level, 2025
GDP per capita
$3,086
2025
Happiness
3.9 / 10
World Happiness, 2025
Safe drinking water
79%
of population, 2024
Homicide rate
1.3
per 100k, 2017
Road deaths
10.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 459
Religion
Muslim 90%Christian 10%

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 Rosetta (31.3995°, 30.4172°, 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).