Si Satchanalai weather in December

In December, Si Satchanalai sees average daytime highs of 31°C and overnight lows near 19°C, with 12 mm of rain across 1.7 wet days and about 11 hours of daylight. It is the 12th-warmest and 11th-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 64% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 hours at the start of December to 11 hours by month's end. Set against the rest of the year, December is Si Satchanalai's 4th-clearest and 8th-windiest month. For the whole year in context, see Si Satchanalai's year-round climate.

Daytime high
31°
12th warmest
Overnight low
19°
2nd coldest
Rainfall
12 mm
1.7 wet days
Daylight
11 hours
6:48 AM – 5:46 PM
Cloud cover
33%
4th clearest
Wind
5 km/h
8th windiest
Solar energy
4.47 kWh/m²
Travel score
5.8
out of 10

Si Satchanalai is town in Sukhothai province, Thailand.

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 31°C through the month.

A typical December day in Si Satchanalai reaches about 31°C in the afternoon and slips back to 19°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13121
23121
33120
43120
53120
63120
73120
83120
93120
103120
113120
123119
133119
143119
153119
163119
173119
183119
193119
203119
213118
223018
233018
243018
253018
263018
273018
283018
293118
303118
313118

How December really feels in Si Satchanalai

Once humidity and wind are folded in, December averages 13 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
13
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 Satchanalai weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 18°152.111.15.4
Feb34° / 20°101.111.43.8
Mar37° / 23°263.511.92.1
Apr38° / 26°568.312.41.2
May36° / 26°21119.612.81.7
Jun34° / 26°20122.1132.1
Jul33° / 26°21523.312.92.3
Aug32° / 26°28025.712.62.4
Sep32° / 25°25923.912.12.4
Oct32° / 24°12914.511.63.5
Nov32° / 22°27411.24.8
Dec31° / 19°121.7115.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17822
27822
37921
47921
57921
67921
77822
87921
97921
107921
118020
128119
138119
148119
158317
168317
178317
188416
198416
208515
218515
228614
238515
248515
258416
268416
278416
288317
298317
308218
318119

Chance of precipitation in December

Any precipitation

Si Satchanalai gets around 12 mm of rain over 1.7 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 6% and peaks near 9% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
19
29
39
49
58
68
78
87
97
106
116
125
135
144
154
164
174
184
194
204
214
224
235
245
255
265
276
286
297
307
317

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1151838327
2151938316
3152037306
4162137296
5162138295
6172237285
7172337275
8182437264
9182537254
10192537243
112102637233
122112637222
132122637212
142142636202
152152736191
163162736181
173172735171
183182735161
194192735150
204192835140
215202734130
225202834130
235212834120
246212833120
256212933110
266202933110
276203034110
286193034110
296183035100
305183135110
315173136110

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 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
305calm
315calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 6:40 AM to 6:55 AM, and sunset from 5:42 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:405:42
211.06:405:42
311.06:415:42
411.06:425:42
511.06:425:42
611.06:435:43
711.06:435:43
811.06:445:43
911.06:455:43
1011.06:455:44
1111.06:465:44
1211.06:465:44
1311.06:475:45
1411.06:475:45
1511.06:485:45
1611.06:485:46
1711.06:495:46
1811.06:495:47
1911.06:505:47
2011.06:505:48
2111.06:515:48
2211.06:515:48
2311.06:525:49
2411.06:525:49
2511.06:535:50
2611.06:535:50
2711.06:545:51
2811.06:545:51
2911.06:545:52
3011.06:555:53
3111.06:555:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.47 kWh/m².

For context, solar energy here swings from a low near 3.99 kWh/m² to a high of 6.3 kWh/m² in April across the year — December's 4.47 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in December

Hazard calendar for Si Satchanalai

In seasonPeak

None of Si Satchanalai'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 Satchanalai'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 Satchanalai?

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

5.8
Sightseeing
1st-best month of the year
8.4
Beach & pool
1st-best month of the year

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

What to pack for Si Satchanalai in December

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

In December, Si Satchanalai sees daytime highs around 31°C and nights near 19°C. Pack light clothes.

light clothes

UV index in Si Satchanalai in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Si Satchanalai peaks around June 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 19UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar9Very high
Apr11Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7Very high

Air quality in Si Satchanalai 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 Satchanalai is worst in March — around 58 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (June, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModeratePoorMar 1556 µg/m³Jun 2221 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb50Poor
Mar58Unhealthy
Apr47Poor
May29Moderate
Jun21Moderate
Jul22Moderate
Aug23Moderate
Sep26Moderate
Oct31Moderate
Nov33Moderate
Dec37Poor
Location & terrain

Where is Si Satchanalai?

Si Satchanalai sits at 17.5°N, 99.8°E, 77 m above sea level, in Thailand. The nearest listed city is Sawankhalok, 24 km away.

Topography around Si Satchanalai

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

Within 3 km, the terrain around Si Satchanalai has only modest variations in elevation — a maximum elevation change of 158 m around an average of 83 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 352 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,381 m.

The land around Si Satchanalai is covered by cropland (47%) and trees (39%) within 3 km, trees (48%) and cropland (48%) within 16 km, and trees (62%) and cropland (35%) within 80 km.

3 km
158 m
16 km
352 m
80 km
1,381 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Sawankhalok 24 km · Uttaradit 37 km · Ban Na 56 km · Sukhothai 57 km · Thoen 59 km · Den Chai 60 km · Phrae 81 km · Ban Tak 89 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 Satchanalai (17.5169°, 99.7598°, elevation 77 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).