Glan weather in December

In December, Glan sees average daytime highs of 28°C and overnight lows near 25°C, with 143 mm of rain across 21.3 wet days and about 11.7 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°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 Glan's 7th-clearest and 12th-windiest month. For the whole year in context, see Glan's year-round climate.

Daytime high
28°
4th warmest
Overnight low
25°
9th coldest
Rainfall
143 mm
21.3 wet days
Daylight
11 h 42 min
5:45 AM – 5:25 PM
Cloud cover
77%
7th clearest
Wind
7 km/h
12th windiest
Solar energy
4.83 kWh/m²
Travel score
4.1
out of 10

Glan is municipality of the Philippines in the province of Sarangani.

Density
40/km²
people per km²
Founded
1914

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in Glan reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302825
312825

How December really feels in Glan

Once humidity and wind are folded in, December averages 21 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
21
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.

Glan weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°15417.711.74.7
Feb28° / 25°10013.811.84.9
Mar29° / 25°9615.8124.8
Apr29° / 26°1031612.14.6
May29° / 26°16623.112.33.9
Jun28° / 25°21925.712.33.7
Jul28° / 25°20326.312.33.9
Aug28° / 25°18124.912.24.1
Sep28° / 25°11820.4124.5
Oct28° / 25°1612211.94.1
Nov28° / 26°1622311.73.9
Dec28° / 25°14321.311.74.1

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 11% of December, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22575
32575
42575
52674
62575
72575
82575
92575
102575
112476
122476
132476
142476
152476
162377
172278
182278
192278
202377
212377
222377
232377
242377
252377
262377
272377
282377
292476
302476
312476

Chance of precipitation in December

Any precipitation

Glan gets around 143 mm of rain over 21.3 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 69% and peaks near 71% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
171
270
370
470
570
670
770
870
970
1071
1171
1271
1371
1471
1570
1670
1770
1870
1969
2069
2168
2268
2367
2467
2566
2666
2765
2865
2964
3064
3164

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
106337
206337
306436
406436
506535
606535
706634
806733
906832
1006931
1107030
1207129
1307228
1407228
1507327
1607426
1707525
1807525
1907624
2007624
2107723
2217623
2317722
2417722
2517821
2617821
2717920
2827919
2928018
3028117
3128216

Wind in December

Winds average 7 km/h in December, the calmest month.

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

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
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 5:38 AM to 5:52 AM, and sunset from 5:20 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:385:20
211.75:395:20
311.75:395:20
411.75:405:21
511.75:405:21
611.75:415:21
711.75:415:22
811.75:425:22
911.75:425:22
1011.75:435:23
1111.75:435:23
1211.75:435:24
1311.75:445:24
1411.75:445:24
1511.75:455:25
1611.75:455:25
1711.75:465:26
1811.75:465:26
1911.75:475:27
2011.75:475:27
2111.75:485:28
2211.75:485:28
2311.75:495:28
2411.75:495:29
2511.75:505:29
2611.75:505:30
2711.75:515:30
2811.75:515:31
2911.75:515:31
3011.75:525:32
3111.75:525:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.83 kWh/m².

For context, solar energy here swings from a low near 4.81 kWh/m² to a high of 6.01 kWh/m² in April across the year — December's 4.83 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Glan

In seasonPeak

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

Glan 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 Glan?

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

4.1
Sightseeing
6th-best month of the year
5.0
Beach & pool
5th-best month of the year

December is a reasonable time to visit Glan for sightseeing.

What to pack for Glan in December

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

In December, Glan sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Glan 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 offshore is warmest in May at about 29°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°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Glan 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 Glan peaks around March 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 18UV 15Dec 13UV 11
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec10Extreme
Location & terrain

Where is Glan?

Glan sits at 5.8°N, 125.2°E, 9 m above sea level, in Philippines. The nearest listed city is Malapatan, 19 km away.

Topography around Glan

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

Within 3 km, the terrain around Glan has significant variations in elevation — a maximum elevation change of 288 m around an average of 47 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 668 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,255 m.

The land around Glan is covered by trees (65%) and water (27%) within 3 km, water (60%) and trees (37%) within 16 km, and water (51%) and trees (42%) within 80 km.

3 km
288 m
16 km
668 m
80 km
2,255 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Malapatan 19 km · General Santos 32 km · Alabel 32 km · Polomolok 47 km · Maluñgun 51 km · Tupi 63 km · Lake Sebu 70 km · Lambayong 79 km

Philippines travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$4,171
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
4.3
per 100k, 2023
Road deaths
12
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 569
Religion
Roman Catholic 79%other 8%Muslim 6%other Christian 4%

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 Glan (5.8242°, 125.2033°, elevation 9 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).