Devinuwara weather in December

In December, Devinuwara sees average daytime highs of 29°C and overnight lows near 24°C, with 199 mm of rain across 21.4 wet days and about 11.7 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 13% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of December to 11 h 42 min by month's end. Set against the rest of the year, December is Devinuwara's 5th-clearest and 11th-windiest month. For the whole year in context, see Devinuwara's year-round climate.

Daytime high
29°
6th warmest
Overnight low
24°
3rd coldest
Rainfall
199 mm
21.4 wet days
Daylight
11 h 42 min
6:14 AM – 5:54 PM
Cloud cover
73%
5th clearest
Wind
8 km/h
11th windiest
Solar energy
4.93 kWh/m²
Travel score
4.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Devinuwara reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
22924
32924
42924
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192924
202924
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924
312924

How December really feels in Devinuwara

Once humidity and wind are folded in, December averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Devinuwara weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°9714.311.74.7
Feb30° / 24°7812.511.84.5
Mar31° / 25°9918123.9
Apr30° / 25°18225.512.13.1
May29° / 26°22428.212.33.0
Jun29° / 25°18726.912.33.2
Jul28° / 25°15926.812.33.4
Aug28° / 25°1592712.23.4
Sep28° / 25°19626.2123.4
Oct29° / 24°25026.611.93.4
Nov29° / 24°29625.411.73.4
Dec29° / 24°19921.411.74.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32872
42872
52872
62872
72872
82872
92872
102971
112971
122971
132872
142971
152971
162971
172971
183169
193169
203268
213268
223466
233466
243565
253664
263664
273763
283763
293763
303961
313961

Chance of precipitation in December

Any precipitation

Devinuwara gets around 199 mm of rain over 21.4 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 70% and peaks near 80% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
180
279
379
478
578
678
777
877
977
1077
1176
1276
1375
1475
1574
1673
1772
1871
1969
2068
2166
2265
2363
2461
2560
2658
2757
2856
2955
3054
3153

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the oppressive band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118217
218217
318316
428216
528315
628315
728315
828414
928414
1028513
1128513
1228513
1328513
1428612
1528612
1638611
1738611
1838710
1938710
203889
214879
224888
235878
245878
256877
266877
277876
287876
297885
308875
318884

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 42 min at the start of December to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:07 AM to 6:21 AM, and sunset from 5:48 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:075:48
211.76:075:48
311.76:085:48
411.76:085:49
511.76:095:49
611.76:095:49
711.76:105:50
811.76:105:50
911.76:115:51
1011.76:115:51
1111.76:125:51
1211.76:125:52
1311.76:135:52
1411.76:135:53
1511.76:145:53
1611.76:145:54
1711.76:155:54
1811.76:155:54
1911.76:165:55
2011.76:165:55
2111.76:165:56
2211.76:175:56
2311.76:175:57
2411.76:185:57
2511.76:185:58
2611.76:195:58
2711.76:195:59
2811.76:205:59
2911.76:206:00
3011.76:216:00
3111.76:216:01

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.93 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 6.48 kWh/m² in March across the year — December's 4.93 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.1Bright
285.1Bright
295.1Bright
305.2Bright
315.2Bright
Planning a trip in December

Hazard calendar for Devinuwara

In seasonPeak

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

Devinuwara sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is December a good time to visit Devinuwara?

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

4.0
Sightseeing
3rd-best month of the year
5.1
Beach & pool
4th-best month of the year

December is a reasonable time to visit Devinuwara for sightseeing.

What to pack for Devinuwara in December

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

In December, Devinuwara sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Devinuwara in December

The nearest coast averages about 28°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 April at about 30°C and coldest in July near 28°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug28Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec28Tropical

UV index in Devinuwara in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Devinuwara peaks around April 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 17UV 14Jan 11UV 9
UV index (midday)Level
Jan9Very high
Feb14Extreme
Mar12Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec10Very high

Air quality in Devinuwara 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 Devinuwara is worst in January — around 35 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (September, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1834 µg/m³Sep 1316 µg/m³
PM2.5 (µg/m³)Level
Jan35Moderate
Feb31Moderate
Mar25Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul17Moderate
Aug17Moderate
Sep16Moderate
Oct18Moderate
Nov25Moderate
Dec30Moderate
Location & terrain

Where is Devinuwara?

Devinuwara sits at 5.9°N, 80.6°E, 16 m above sea level, in Sri Lanka. The nearest listed city is Matara, 6.0 km away.

UnawatunaGalleAmbalantotaHambantota

Topography around Devinuwara

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

Within 3 km, the terrain around Devinuwara has only modest variations in elevation — a maximum elevation change of 58 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 225 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,507 m.

The land around Devinuwara is covered by water (55%) and trees (36%) within 3 km, water (58%) and trees (35%) within 16 km, and trees (52%) and water (42%) within 80 km.

3 km
58 m
16 km
225 m
80 km
1,507 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Matara 6.0 km · Mirissa 15 km · Weligama 18 km · Beliatta 21 km · Unawatuna 39 km · Galle 44 km · Ambalantota 52 km · Hambantota 62 km

Sri Lanka travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 27% of US
price level, 2025
GDP per capita
$5,002
2025
Happiness
4.0 / 10
World Happiness, 2025
Safe drinking water
47%
of population, 2024
Homicide rate
3.3
per 100k, 2019
Road deaths
19.7
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 486
Religion
Buddhist 70%Hindu 13%Muslim 10%Roman Catholic 6%

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 Devinuwara (5.9283°, 80.5888°, elevation 16 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).