Avg High
Bangkok in December
Avg Low
Rain
Daylight
11h
What to expect
Bangkok is in early winter during December, with the season well established by this point. Afternoons often feel hot in direct sun, and a gentle drop-off once the sun goes down. You get a comfortable daylight window for day trips and sightseeing. Conditions tend to feel steady, which makes planning simple. Day to day, heat tends to concentrate in the middle of the day, and humidity is noticeable and can make afternoons feel heavier.
December in context
How it compares to the rest of the year in Bangkok.
Hottest (avg)
#11 / 12
Wettest (avg)
#12 / 12
Daylight Hours
#12 / 12
Windiest (avg)
#8 / 12
Highest UV
#12 / 12
Most Humid
#12 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 11.3 h
- UV index (max)
- 7
- Typical sun hours
- 06:33 - 17:53
Rain & Snow
- Total rain
-
- Rainy days
- 4 days
- Cloud cover (avg)
- 49%
Humidity & Wind
- Humidity (avg)
- 62%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for December. Typical high 31.1°C and low 22.2°C.
Typical disruptions in December
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in December.
Heat High impact
Hot days Measures: Hot days (>=30C). Observed about 71% of days (22.1 days/month) in December. Historical risk signal only, not a day-by-day forecast.
22.1 days / month
~71% of days
Why this matters
- Expected days 22.1 days / month
- Probability ~71% of days
- Intensity Up to ~34°C (P95)
Hot days are possible on ~22 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Hot feels-like days Measures: Hot feels-like days (>=32C). Observed about 67% of days (20.9 days/month) in December. Historical risk signal only, not a day-by-day forecast.
20.9 days / month
~67% of days
Why this matters
- Expected days 20.9 days / month
- Probability ~67% of days
- Intensity Up to ~38°C (P95)
Feels-like heat >=32C is possible on ~21 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity High impact
Muggy days Measures: Muggy days (dew point >=20C). Observed about 31% of days (9.6 days/month) in December. Historical risk signal only, not a day-by-day forecast.
9.6 days / month
~31% of days
Why this matters
- Expected days 9.6 days / month
- Probability ~31% of days
- Intensity Up to ~24°C (P95)
Muggy conditions are possible on ~10 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat High impact
Very hot feels-like Measures: Very hot feels-like days (>=35C). Observed about 30% of days (9.3 days/month) in December. Historical risk signal only, not a day-by-day forecast.
9.3 days / month
~30% of days
Why this matters
- Expected days 9.3 days / month
- Probability ~30% of days
- Intensity Up to ~38°C (P95)
Very hot feels-like conditions are possible on ~9 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat High impact
Heat stress risk Measures: High heat stress days. Observed about 29% of days (8.9 days/month) in December. Historical risk signal only, not a day-by-day forecast.
8.9 days / month
~29% of days
Why this matters
- Expected days 8.9 days / month
- Probability ~29% of days
- Intensity Up to ~38°C (P95)
Heat stress is possible on ~9 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat Moderate
Heatwave run Measures: Heatwave runs (>=3 hot days). Observed about 2.1 days/month in December. Historical risk signal only, not a day-by-day forecast.
2.1 days / month
Probability unavailable
Why this matters
- Expected days 2.1 days / month
- Probability —
- Intensity Up to ~33°C (P95)
Heatwave runs are possible on ~2 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Show all disruptions (18 more)
Rain High impact
Washout risk Measures: Washout day risk. Observed about 1% of days (0.4 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~23mm (P95)
Washout conditions are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.1 days/month in December. Historical risk signal only, not a day-by-day forecast.
0.1 days / month
Probability unavailable
Why this matters
- Expected days 0.1 days / month
- Probability —
- Intensity Up to ~31mm (P95)
Multi-day washout runs are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Moderate
Feels-like heatwave Measures: Feels-like heatwave runs (>=3 days). Observed about 1.9 days/month in December. Historical risk signal only, not a day-by-day forecast.
1.9 days / month
Probability unavailable
Why this matters
- Expected days 1.9 days / month
- Probability —
- Intensity Up to ~38°C (P95)
Feels-like heatwave runs are possible on ~2 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 2% of days (0.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~19mm (P95)
Rain disruption risk appears on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 1% of days (0.2 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~29mm (P95)
Heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Minor
Warm nights Measures: Warm nights (min >=22C). Observed about 55% of days (17.0 days/month) in December. Historical risk signal only, not a day-by-day forecast.
17.0 days / month
~55% of days
Why this matters
- Expected days 17.0 days / month
- Probability ~55% of days
- Intensity Up to ~25°C (P95)
Warm nights are possible on ~17 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Humid days Measures: Humid days (dew point >=18C). Observed about 51% of days (15.8 days/month) in December. Historical risk signal only, not a day-by-day forecast.
15.8 days / month
~51% of days
Why this matters
- Expected days 15.8 days / month
- Probability ~51% of days
- Intensity Up to ~24°C (P95)
Humid conditions are possible on ~16 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 34% of days (10.6 days/month) in December. Historical risk signal only, not a day-by-day forecast.
10.6 days / month
~34% of days
Why this matters
- Expected days 10.6 days / month
- Probability ~34% of days
- Intensity Up to ~97% (P95)
Cloudy skies are possible on ~11 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 21% of days (6.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
6.5 days / month
~21% of days
Why this matters
- Expected days 6.5 days / month
- Probability ~21% of days
- Intensity Up to ~6.7mm (P95)
Measurable rain is possible on ~7 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 15% of days (4.8 days/month) in December. Historical risk signal only, not a day-by-day forecast.
4.8 days / month
~15% of days
Why this matters
- Expected days 4.8 days / month
- Probability ~15% of days
- Intensity Up to ~99% (P95)
Mostly cloudy skies are possible on ~5 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 11% of days (3.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
3.5 days / month
~11% of days
Why this matters
- Expected days 3.5 days / month
- Probability ~11% of days
- Intensity Up to ~13h (P95)
Several rainy hours are possible on ~3 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Minor
Hot nights Measures: Hot nights (min >=25C). Observed about 6% of days (1.9 days/month) in December. Historical risk signal only, not a day-by-day forecast.
1.9 days / month
~6% of days
Why this matters
- Expected days 1.9 days / month
- Probability ~6% of days
- Intensity Up to ~27°C (P95)
Hot nights are possible on ~2 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 5% of days (1.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
1.5 days / month
~5% of days
Why this matters
- Expected days 1.5 days / month
- Probability ~5% of days
- Intensity Up to ~88% (P95)
High humidity is possible on ~1 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 5% of days (1.4 days/month) in December. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
~5% of days
Why this matters
- Expected days 1.4 days / month
- Probability ~5% of days
- Intensity Up to ~18h (P95)
Wet-most-of-day conditions are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 4% of days (1.3 days/month) in December. Historical risk signal only, not a day-by-day forecast.
1.3 days / month
~4% of days
Why this matters
- Expected days 1.3 days / month
- Probability ~4% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 2% of days (0.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~46km/h (P95)
Gusty conditions are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Humidity Minor
Convective risk Measures: Convective storm risk proxy. Observed about 2% of days (0.5 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~24°C (P95)
Convective risk signal appears on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Oppressive humidity Measures: Oppressive humidity days (dew point >=24C). Observed about 1% of days (0.4 days/month) in December. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~25°C (P95)
Oppressive humidity is possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Frequently asked questions
Is December a good time to visit Bangkok?
Typical December days in Bangkok reach highs of 31°C (88°F) with nights around 22°C (72°F). It usually feels hot by day and mild after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in December?
In December, you can usually expect highs of 31°C (88°F) and lows near 22°C (72°F). That means hot days and mild nights, so pack layers you can add or remove.
How much does it rain in December?
Rainfall in December averages 11 mm (0.43 in) across roughly 4 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in December?
You can expect about 11 hours of daylight in December. Sunrise is typically around 06:33 and sunset near 17:53. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in December?
UV levels are often high (around 7). Regular sunscreen and a hat are recommended.
Is it windy in December?
In December, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 34 km/h (21 mph). On the ground, it is a gentle to moderate breeze is common, but stronger winds are not frequent.