Perai weather in December

In December, Perai sees average daytime highs of 31°C and overnight lows near 24°C, with 191 mm of rain across 20.2 wet days and about 11.7 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 7% 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 Perai's 5th-clearest and 1st-windiest month. For the whole year in context, see Perai's year-round climate.

Daytime high
31°
10th warmest
Overnight low
24°
2nd coldest
Rainfall
191 mm
20.2 wet days
Daylight
11 h 42 min
7:24 AM – 7:05 PM
Cloud cover
82%
5th clearest
Wind
5 km/h
1st windiest
Solar energy
4.36 kWh/m²
Travel score
3.3
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical December day in Perai reaches about 31°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, December runs on par with November and about 1°C cooler than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13125
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How December really feels in Perai

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.

Perai weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°10915.111.73.6
Feb32° / 25°9814.611.83.2
Mar33° / 25°17322.1122.7
Apr32° / 25°2172712.12.3
May32° / 25°22026.612.22.4
Jun32° / 25°14720.112.32.9
Jul32° / 25°14820.512.33.0
Aug32° / 25°18623.312.22.8
Sep31° / 25°23125.5122.7
Oct31° / 25°3262911.92.5
Nov31° / 25°31427.211.82.6
Dec31° / 24°19120.211.73.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11288
21486
31486
41486
51486
61486
71486
81486
91486
101486
111486
121585
131585
141684
151783
161783
171783
181783
191783
201783
211783
221684
231783
241783
251783
261882
271882
282080
292080
302278
312278

Chance of precipitation in December

Any precipitation

Perai gets around 191 mm of rain over 20.2 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 66% and peaks near 81% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
181
280
379
478
577
676
775
874
973
1072
1171
1270
1369
1468
1566
1665
1764
1862
1961
2060
2159
2258
2357
2457
2556
2655
2755
2855
2954
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 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
114554
214653
314752
414851
514950
615049
715148
815148
915247
1015346
1115445
1215445
1315544
1415643
1515742
1615841
1725840
1825939
1926038
2026236
2126335
2236334
2336433
2436532
2536631
2636730
2736730
2846729
2946729
3046729
3146729

Wind in December

Winds average 5 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 7:17 AM to 7:31 AM, and sunset from 7:00 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:177:00
211.77:177:00
311.77:187:00
411.77:187:01
511.77:197:01
611.77:197:01
711.77:207:02
811.77:207:02
911.77:217:02
1011.77:217:03
1111.77:227:03
1211.77:227:04
1311.77:227:04
1411.77:237:04
1511.77:237:05
1611.77:247:05
1711.77:247:06
1811.77:257:06
1911.77:257:07
2011.77:267:07
2111.77:267:08
2211.77:277:08
2311.77:277:09
2411.77:287:09
2511.77:287:09
2611.77:297:10
2711.77:297:10
2811.77:307:11
2911.77:307:11
3011.77:307:12
3111.77:317:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.36 kWh/m².

For context, solar energy here swings from a low near 4.25 kWh/m² to a high of 5.72 kWh/m² in March across the year — December's 4.36 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in December

Hazard calendar for Perai

In seasonPeak

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

Perai sits in the Pacific typhoon belt; the season peaks July–October.

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

Is December a good time to visit Perai?

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

3.3
Sightseeing
2nd-best month of the year
4.9
Beach & pool
3rd-best month of the year

December is a weaker month for outdoor sightseeing in Perai.

What to pack for Perai in December

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

In December, Perai sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 20 days see rain.

light clothesrain gear

Sea temperature near Perai in December

The nearest coast averages about 29°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 May at about 31°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May31Tropical
Jun31Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov29Tropical
Dec29Tropical

UV index in Perai 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 Perai peaks around February 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 16 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeFeb 18UV 14Jul 16UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar13Extreme
Apr13Extreme
May10Extreme
Jun11Extreme
Jul10Very high
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Perai 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 Perai is worst in March — around 31 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1631 µg/m³Nov 2026 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb29Moderate
Mar31Moderate
Apr28Moderate
May27Moderate
Jun28Moderate
Jul31Moderate
Aug29Moderate
Sep30Moderate
Oct30Moderate
Nov26Moderate
Dec27Moderate
Location & terrain

Where is Perai?

Perai sits at 5.4°N, 100.4°E, 5 m above sea level, in Malaysia. The nearest listed city is Butterworth, 3.0 km away.

Topography around Perai

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

Within 3 km, the terrain around Perai has only modest variations in elevation — a maximum elevation change of 33 m around an average of 4 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 842 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,832 m.

The land around Perai is covered by artificial surfaces (53%) and water (28%) within 3 km, water (34%), trees (28%) and artificial surfaces (23%) within 16 km, and trees (45%) and water (43%) within 80 km.

3 km
33 m
16 km
842 m
80 km
1,832 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Butterworth 3.0 km · George Town 6.0 km · Jelutong 7.0 km · Bukit Tengah 7.0 km · Kampung Sungai Glugur 8.0 km · Sungai Dua 8.0 km · Kubang Semang 9.0 km · Glugor 9.0 km

Malaysia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / G / M
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$13,125
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
22.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 581
Religion
Muslim 64%Buddhist 19%Christian 9%Hindu 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 Perai (5.3833°, 100.3833°, elevation 5 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).