Si Maha Phot weather in December

In December, Si Maha Phot sees average daytime highs of 31°C and overnight lows near 21°C, with 5 mm of rain across 1.2 wet days and about 11.2 hours of daylight. It is the 12th-warmest and 12th-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 47% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 12 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Si Maha Phot's 4th-clearest and 1st-windiest month. For the whole year in context, see Si Maha Phot's year-round climate.

Daytime high
31°
12th warmest
Overnight low
21°
2nd coldest
Rainfall
5 mm
1.2 wet days
Daylight
11 h 12 min
6:35 AM – 5:45 PM
Cloud cover
47%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
4.82 kWh/m²
Travel score
5.5
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 Si Maha Phot reaches about 31°C in the afternoon and slips back to 21°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13222
23222
33122
43122
53122
63122
73122
83122
93122
103122
113122
123121
133121
143121
153121
163121
173121
183121
193121
203121
213121
223121
233121
243121
253120
263120
273120
283120
293120
303120
313120

How December really feels in Si Maha Phot

Once humidity and wind are folded in, December averages 15 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
15
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.

Si Maha Phot weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 21°102.211.35.1
Feb33° / 22°13311.54.2
Mar34° / 24°418.511.93.1
Apr35° / 26°7013.312.32.3
May34° / 26°2092412.62.1
Jun32° / 25°26726.512.82.2
Jul32° / 25°28127.612.72.3
Aug32° / 25°30028.212.52.3
Sep31° / 25°30827.312.12.4
Oct32° / 24°14818.811.73.4
Nov32° / 23°244.311.44.7
Dec31° / 21°51.211.25.5

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 22% of December, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36337
46337
56337
66337
76337
86238
96337
106436
116436
126535
136535
146634
156733
166832
176931
187030
197129
207129
217228
227327
237327
247327
257426
267327
277327
287327
297327
307228
317228

Chance of precipitation in December

Any precipitation

Si Maha Phot gets around 5 mm of rain over 1.2 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 4% and peaks near 6% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
16
26
35
45
55
65
74
84
94
104
114
123
133
143
153
163
173
183
193
203
213
223
233
243
253
263
273
284
294
304
315

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1141838335
2151938325
3151939314
4162039314
5162139303
6162139293
7172239292
8172339282
9282438271
10282538261
11292538251
122102637241
132112636241
143122635231
153122735231
164132734220
174142733220
185142732220
196152731210
206152730210
217152830200
227162829200
237162829190
247162930180
258162829180
268162830170
277162931170
287162931170
297162932170
306152932170
316153032171

Wind in December

Winds average 9 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 12 min at the start of December to 11 h 12 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 6:27 AM to 6:42 AM, and sunset from 5:41 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:275:41
211.26:275:41
311.26:285:41
411.26:285:41
511.26:295:42
611.26:295:42
711.26:305:42
811.26:305:43
911.26:315:43
1011.26:325:43
1111.26:325:44
1211.26:335:44
1311.26:335:44
1411.26:345:45
1511.26:345:45
1611.26:355:45
1711.26:355:46
1811.26:365:46
1911.26:365:47
2011.26:375:47
2111.26:375:48
2211.26:385:48
2311.26:385:49
2411.26:395:49
2511.26:395:50
2611.26:395:50
2711.26:405:51
2811.26:405:51
2911.26:415:52
3011.26:415:52
3111.26:425:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.82 kWh/m².

For context, solar energy here swings from a low near 4.32 kWh/m² to a high of 5.95 kWh/m² in April across the year — December's 4.82 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Si Maha Phot

In seasonPeak

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

Si Maha Phot's monsoon runs May–October, when most of the year's rain falls.

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

Is December a good time to visit Si Maha Phot?

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

5.5
Sightseeing
1st-best month of the year
8.1
Beach & pool
1st-best month of the year

December is a reasonable time to visit Si Maha Phot for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Si Maha Phot in December

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

In December, Si Maha Phot sees daytime highs around 31°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Si Maha Phot in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Si Maha Phot peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 14UV 13Nov 23UV 9
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Si Maha Phot 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 Si Maha Phot is worst in February — around 60 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (December, 34 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorFeb 1759 µg/m³Dec 1035 µg/m³
PM2.5 (µg/m³)Level
Jan53Poor
Feb60Unhealthy
Mar56Unhealthy
Apr48Poor
May40Poor
Jun35Moderate
Jul35Poor
Aug36Poor
Sep40Poor
Oct41Poor
Nov36Poor
Dec34Moderate
Location & terrain

Where is Si Maha Phot?

Si Maha Phot sits at 14.0°N, 101.5°E, 11 m above sea level, in Thailand. The nearest listed city is Prachantakham, 11 km away.

Topography around Si Maha Phot

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

Within 3 km, the terrain around Si Maha Phot has only modest variations in elevation — a maximum elevation change of 21 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 44 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,362 m.

The land around Si Maha Phot is covered by cropland (42%) and trees (39%) within 3 km, cropland (44%) and trees (36%) within 16 km, and trees (59%) and cropland (30%) within 80 km.

3 km
21 m
16 km
44 m
80 km
1,362 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Prachantakham 11 km · Si Mahosot 15 km · Prachin Buri Town 18 km · Prachin Buri 18 km · Thambon Na Mueang 18 km · Ban Phra 20 km · Kabin Buri 22 km · Phanom Sarakham 30 km

Thailand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$8,057
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
4.8
per 100k, 2011
Road deaths
32.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 402
Religion
Buddhist 93%Muslim 5%Christian 1%other 1%

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 Si Maha Phot (13.9656°, 101.5135°, elevation 11 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).