Sai Mai weather in January

In January, Sai Mai sees average daytime highs of 32°C and overnight lows near 21°C, with 15 mm of rain across 3.5 wet days and about 11.3 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 53% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 12 min at the start of January to 11 h 24 min by month's end. Set against the rest of the year, January is Sai Mai's 2nd-clearest and 11th-windiest month. For the whole year in context, see Sai Mai's year-round climate.

Daytime high
32°
11th warmest
Overnight low
21°
1st coldest
Rainfall
15 mm
3.5 wet days
Daylight
11 h 18 min
6:49 AM – 6:05 PM
Cloud cover
42%
2nd clearest
Wind
6 km/h
11th windiest
Solar energy
4.99 kWh/m²
Travel score
4.9
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical January day in Sai Mai reaches about 32°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 29°C and 34°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13121
23221
33221
43221
53221
63221
73221
83221
93221
103221
113221
123221
133221
143221
153221
163221
173221
183222
193222
203222
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222
313222

How January really feels in Sai Mai

Once humidity and wind are folded in, January 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 January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sai Mai weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 21°153.511.34.9
Feb33° / 23°163.711.54.1
Mar34° / 25°568.511.93.0
Apr35° / 27°9114.712.32.1
May34° / 27°18524.212.61.8
Jun34° / 27°17924.812.82.0
Jul33° / 26°18525.912.72.1
Aug33° / 26°20426.212.52.1
Sep32° / 26°28426.912.12.2
Oct32° / 25°16719.611.73.0
Nov32° / 24°335.811.44.3
Dec32° / 22°9211.25.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47129
57030
67030
76931
86931
96931
106931
116931
126931
136931
147030
157030
167030
177129
187129
197228
207327
217327
227327
237426
247525
257624
267624
277723
287723
297921
308020
318020

Chance of precipitation in January

Any precipitation

Sai Mai gets around 15 mm of rain over 3.5 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 11% and peaks near 12% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
18
28
39
49
59
610
710
810
911
1011
1111
1211
1311
1411
1511
1611
1711
1812
1912
2012
2112
2212
2312
2412
2512
2612
2712
2812
2912
3011
3111

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
14112532244
24102533244
33102533254
4392433265
5392433275
6392332286
7292332296
8282231306
9282131317
10282130327
11282029337
12282029348
13282028348
14271928359
15271927359
162719273510
172719263511
182718263511
193718263512
203718263512
213718253413
223618253413
233618253414
243617253414
253717253415
263717243515
273716243516
283816233516
293816223516
302815223616
312915213617

Wind in January

Winds average 6 km/h in January.

Across January, daily wind ranges from about 6 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
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 12 min at the start of January to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over January. Sunrise moves from 6:45 AM to 6:49 AM, and sunset from 5:56 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:455:56
211.26:455:57
311.26:465:57
411.26:465:58
511.26:465:58
611.26:475:59
711.26:476:00
811.26:476:00
911.26:476:01
1011.26:486:01
1111.26:486:02
1211.26:486:02
1311.26:486:03
1411.26:496:03
1511.36:496:04
1611.36:496:05
1711.36:496:05
1811.36:496:06
1911.36:496:06
2011.36:496:07
2111.36:496:07
2211.36:506:08
2311.36:506:08
2411.36:506:09
2511.36:506:09
2611.36:506:10
2711.36:506:10
2811.46:506:11
2911.46:506:11
3011.46:496:12
3111.46:496:12

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.99 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.09 kWh/m² in April across the year — January's 4.99 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in January

Hazard calendar for Sai Mai

In seasonPeak

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

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

Sai Mai's rainy season runs May–October, when most of the year's rain falls.

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

Is January a good time to visit Sai Mai?

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

4.9
Sightseeing
2nd-best month of the year
7.7
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Sai Mai for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sai Mai in January

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

In January, Sai Mai sees daytime highs around 32°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Sai Mai in January

The nearest coast averages about 27°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 61 km away) is warmest in May at about 31°C and coldest in January near 27°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Sai Mai in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Sai Mai peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 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 highExtremeExtremeVery highAug 14UV 13Dec 12UV 9
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar12Extreme
Apr11Extreme
May10Very high
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Sai Mai in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Sai Mai is worst in January — around 83 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (July, 43 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJan 2382 µg/m³Jul 2443 µg/m³
PM2.5 (µg/m³)Level
Jan83Unhealthy
Feb81Unhealthy
Mar70Unhealthy
Apr64Unhealthy
May54Poor
Jun44Poor
Jul43Poor
Aug43Poor
Sep54Poor
Oct66Unhealthy
Nov67Unhealthy
Dec66Unhealthy
Location & terrain

Where is Sai Mai?

Sai Mai sits at 13.9°N, 100.6°E, 4 m above sea level, in Thailand. The nearest listed city is Anusawari, 4.0 km away.

Topography around Sai Mai

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

Within 3 km, the terrain around Sai Mai has only modest variations in elevation — a maximum elevation change of 18 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 56 m; within 80 km, large variations in elevation — a maximum elevation change of 1,011 m.

The land around Sai Mai is covered by artificial surfaces (65%) and trees (22%) within 3 km, artificial surfaces (52%) and trees (22%) within 16 km, and cropland (39%) and trees (20%) within 80 km.

3 km
18 m
16 km
56 m
80 km
1,011 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Anusawari 4.0 km · Tha Raeng 6.0 km · Lak Si 8.0 km · Chorakhe Bua 10 km · Khan Na Yao 11 km · Khlong Sam Wa 11 km · Sena Nikhom 12 km · Lat Yao 12 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 Sai Mai (13.9207°, 100.6455°, elevation 4 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).