Diadi weather in December

In December, Diadi sees average daytime highs of 25°C and overnight lows near 19°C, with 258 mm of rain across 20.7 wet days and about 11 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 15% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 06 min at the start of December to 11 hours by month's end. Set against the rest of the year, December is Diadi's 9th-clearest and 1st-windiest month. For the whole year in context, see Diadi's year-round climate.

Daytime high
25°
10th warmest
Overnight low
19°
4th coldest
Rainfall
258 mm
20.7 wet days
Daylight
11 hours
6:20 AM – 5:21 PM
Cloud cover
75%
9th clearest
Wind
5 km/h
1st windiest
Solar energy
2.89 kWh/m²
Travel score
5.1
out of 10

Diadi is municipality of the Philippines in the province of Nueva Vizcaya.

Density
86/km²
people per km²
Founded
1967

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 25°C through the month.

A typical December day in Diadi reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12620
22620
32520
42520
52520
62520
72520
82520
92520
102520
112520
122520
132520
142519
152519
162519
172519
182519
192519
202519
212519
222419
232419
242419
252419
262419
272419
282419
292419
302419
312419

How December really feels in Diadi

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.

Diadi weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 18°20921.211.15.1
Feb25° / 18°17618.211.45.2
Mar27° / 19°15415.811.95.8
Apr29° / 21°13914.312.45.2
May30° / 21°36219.312.83.8
Jun31° / 22°26519.6133.4
Jul30° / 22°39924.412.93.2
Aug30° / 22°48926.412.63.0
Sep29° / 22°45525.412.13.3
Oct28° / 21°27020.711.64.5
Nov26° / 20°19316.811.25.4
Dec25° / 19°25820.7115.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 73%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33268
43268
53268
63169
73169
83169
93268
103169
113070
123070
132971
142971
153070
162971
172971
182773
192674
202575
212575
222377
232377
242179
252080
262179
272179
282179
292278
302278
312278

Chance of precipitation in December

Any precipitation

Diadi gets around 258 mm of rain over 20.7 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 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
161
262
363
463
564
664
765
865
965
1065
1165
1265
1365
1465
1565
1665
1765
1865
1966
2066
2167
2268
2368
2469
2569
2669
2769
2869
2969
3069
3168

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1117748
2118738
3119728
4120718
5120727
6121717
7121717
8121717
9121717
10121717
11121726
12121726
13121726
14222706
15222706
16222706
17223696
18224695
19324685
20325675
21326665
22326665
23327664
24427654
25428644
26429634
27429634
28430633
29430633
30431623
31431623

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
15calm
25calm
35calm
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
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 06 min at the start of December to 11 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 6:12 AM to 6:27 AM, and sunset from 5:17 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:125:17
211.16:135:17
311.16:135:17
411.16:145:17
511.06:145:17
611.06:155:18
711.06:165:18
811.06:165:18
911.06:175:18
1011.06:175:19
1111.06:185:19
1211.06:185:19
1311.06:195:20
1411.06:195:20
1511.06:205:21
1611.06:205:21
1711.06:215:21
1811.06:225:22
1911.06:225:22
2011.06:235:23
2111.06:235:23
2211.06:235:24
2311.06:245:24
2411.06:245:25
2511.06:255:25
2611.06:255:26
2711.06:265:26
2811.06:265:27
2911.06:275:27
3011.06:275:28
3111.06:275:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.89 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.89 kWh/m² to a high of 5.81 kWh/m² in April across the year — December's 2.89 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.0Moderate
63.0Moderate
73.0Moderate
83.0Moderate
93.0Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.0Moderate
303.1Moderate
313.1Moderate
Planning a trip in December

Is December a good time to visit Diadi?

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

5.1
Sightseeing
5th-best month of the year
4.6
Beach & pool
8th-best month of the year

December is a reasonable time to visit Diadi for sightseeing.

What to pack for Diadi in December

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

In December, Diadi sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 21 days see rain.

rain gearlight clothes

UV index in Diadi in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diadi peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 17UV 14Dec 13UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Diadi 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 Diadi is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1616 µg/m³Dec 1611 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Good
Mar15Moderate
Apr17Moderate
May14Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Diadi?

Diadi sits at 16.7°N, 121.4°E, 276 m above sea level, in Philippines. The nearest listed city is Ramon, 20 km away.

Topography around Diadi

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

Within 3 km, the terrain around Diadi has significant variations in elevation — a maximum elevation change of 268 m around an average of 276 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 829 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,878 m.

The land around Diadi is covered by trees (62%) and cropland (24%) within 3 km, trees (47%) and grassland (31%) within 16 km, and trees (71%) within 80 km.

3 km
268 m
16 km
829 m
80 km
2,878 m
treesgrasslandcroplandwater
December weather nearby: Ramon 20 km · Santiago 21 km · Lagawe 27 km · Solano 30 km · San Mateo 30 km · Baggabag B 30 km · Bayombong 35 km · Alicia 37 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 Diadi (16.7262°, 121.3589°, elevation 276 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. 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).