Khao Yoi weather in December
In December, Khao Yoi sees average daytime highs of 30°C and overnight lows near 22°C, with 11 mm of rain across 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 30°C through the month. The sky is clear or mostly clear about 46% of the time in December, and the air most often feels muggy.
Daylight stretches from about 11 h 18 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Khao Yoi's 4th-clearest and 1st-windiest month. For the whole year in context, see Khao Yoi's year-round climate.
- Daytime high
- 30°
- 12th warmest
- Overnight low
- 22°
- 2nd coldest
- Rainfall
- 11 mm
- 2 wet days
- Daylight
- 11 h 12 min
- 6:40 AM – 5:54 PM
- Cloud cover
- 47%
- 4th clearest
- Wind
- 8 km/h
- 1st windiest
- Solar energy
- 4.78 kWh/m²
- Travel score
- 6.1
- out of 10
Temperature in December
Day-to-day highs hold fairly steady near 30°C through the month.
A typical December day in Khao Yoi reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, December runs on par with November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 23 |
| 2 | 30 | 23 |
| 3 | 30 | 23 |
| 4 | 30 | 23 |
| 5 | 30 | 22 |
| 6 | 30 | 22 |
| 7 | 30 | 22 |
| 8 | 30 | 22 |
| 9 | 30 | 22 |
| 10 | 30 | 22 |
| 11 | 30 | 22 |
| 12 | 30 | 22 |
| 13 | 30 | 22 |
| 14 | 30 | 22 |
| 15 | 30 | 22 |
| 16 | 30 | 22 |
| 17 | 30 | 22 |
| 18 | 30 | 21 |
| 19 | 30 | 21 |
| 20 | 30 | 21 |
| 21 | 30 | 21 |
| 22 | 30 | 21 |
| 23 | 30 | 21 |
| 24 | 30 | 21 |
| 25 | 30 | 21 |
| 26 | 30 | 21 |
| 27 | 30 | 21 |
| 28 | 30 | 21 |
| 29 | 30 | 21 |
| 30 | 30 | 21 |
| 31 | 30 | 21 |
How December really feels in Khao Yoi
Once humidity and wind are folded in, December averages 6 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Khao Yoi 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.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 21° | 13 | 2.4 | 11.3 | 5.9 |
| Feb | 32° / 23° | 12 | 2.4 | 11.6 | 4.8 |
| Mar | 34° / 24° | 47 | 7.6 | 11.9 | 3.4 |
| Apr | 35° / 26° | 79 | 12.8 | 12.3 | 2.3 |
| May | 34° / 26° | 145 | 23.1 | 12.6 | 2.0 |
| Jun | 33° / 26° | 124 | 21.1 | 12.8 | 2.4 |
| Jul | 32° / 26° | 149 | 22.5 | 12.7 | 2.6 |
| Aug | 32° / 25° | 159 | 23.9 | 12.4 | 2.6 |
| Sep | 32° / 25° | 212 | 24.9 | 12.1 | 2.5 |
| Oct | 31° / 24° | 191 | 21.5 | 11.7 | 3.4 |
| Nov | 31° / 23° | 47 | 6.5 | 11.4 | 5.1 |
| Dec | 30° / 22° | 11 | 2 | 11.2 | 6.1 |
Cloud cover in December
The sky is clear or mostly clear about 46% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 60 | 60 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 63 | 62 | 63 | 64 | 64 | 65 | 66 | 66 | 67 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 71 | 71 | 71 | 71 | 71 |
| Cloudier (%) | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 37 | 38 | 37 | 36 | 36 | 35 | 34 | 34 | 33 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 29 | 29 | 29 | 29 | 29 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 60 | 40 |
| 2 | 60 | 40 |
| 3 | 60 | 40 |
| 4 | 61 | 39 |
| 5 | 61 | 39 |
| 6 | 61 | 39 |
| 7 | 62 | 38 |
| 8 | 62 | 38 |
| 9 | 62 | 38 |
| 10 | 63 | 37 |
| 11 | 62 | 38 |
| 12 | 63 | 37 |
| 13 | 64 | 36 |
| 14 | 64 | 36 |
| 15 | 65 | 35 |
| 16 | 66 | 34 |
| 17 | 66 | 34 |
| 18 | 67 | 33 |
| 19 | 68 | 32 |
| 20 | 68 | 32 |
| 21 | 69 | 31 |
| 22 | 69 | 31 |
| 23 | 69 | 31 |
| 24 | 69 | 31 |
| 25 | 69 | 31 |
| 26 | 69 | 31 |
| 27 | 71 | 29 |
| 28 | 71 | 29 |
| 29 | 71 | 29 |
| 30 | 71 | 29 |
| 31 | 71 | 29 |
Chance of precipitation in December
Khao Yoi gets around 11 mm of rain over 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 7% and peaks near 11% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 |
| Rain chance (%) | |
|---|---|
| 1 | 11 |
| 2 | 11 |
| 3 | 10 |
| 4 | 10 |
| 5 | 10 |
| 6 | 9 |
| 7 | 9 |
| 8 | 9 |
| 9 | 8 |
| 10 | 8 |
| 11 | 8 |
| 12 | 7 |
| 13 | 6 |
| 14 | 6 |
| 15 | 5 |
| 16 | 5 |
| 17 | 5 |
| 18 | 5 |
| 19 | 5 |
| 20 | 5 |
| 21 | 5 |
| 22 | 5 |
| 23 | 5 |
| 24 | 4 |
| 25 | 4 |
| 26 | 4 |
| 27 | 4 |
| 28 | 5 |
| 29 | 5 |
| 30 | 5 |
| 31 | 5 |
Humidity in December
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 66% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 |
| Comfortable (%) | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 11 |
| Humid (%) | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
| Muggy (%) | 32 | 32 | 33 | 34 | 36 | 37 | 38 | 38 | 39 | 39 | 40 | 39 | 39 | 39 | 38 | 37 | 37 | 36 | 35 | 34 | 34 | 34 | 33 | 33 | 34 | 34 | 35 | 36 | 36 | 37 | 38 |
| Oppressive (%) | 46 | 45 | 43 | 42 | 40 | 39 | 38 | 36 | 35 | 33 | 32 | 31 | 30 | 29 | 28 | 28 | 27 | 26 | 26 | 25 | 24 | 23 | 22 | 21 | 21 | 20 | 20 | 19 | 20 | 20 | 20 |
| Miserable (%) | 4 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 1 | 4 | 13 | 32 | 46 | 4 |
| 2 | 1 | 5 | 14 | 32 | 45 | 3 |
| 3 | 1 | 5 | 14 | 33 | 43 | 3 |
| 4 | 1 | 5 | 15 | 34 | 42 | 3 |
| 5 | 1 | 6 | 15 | 36 | 40 | 2 |
| 6 | 1 | 6 | 15 | 37 | 39 | 2 |
| 7 | 1 | 6 | 16 | 38 | 38 | 1 |
| 8 | 1 | 7 | 17 | 38 | 36 | 1 |
| 9 | 1 | 7 | 17 | 39 | 35 | 1 |
| 10 | 1 | 8 | 18 | 39 | 33 | 1 |
| 11 | 1 | 8 | 18 | 40 | 32 | 1 |
| 12 | 2 | 9 | 19 | 39 | 31 | 0 |
| 13 | 2 | 10 | 19 | 39 | 30 | 0 |
| 14 | 2 | 10 | 20 | 39 | 29 | 0 |
| 15 | 2 | 11 | 20 | 38 | 28 | 0 |
| 16 | 3 | 12 | 20 | 37 | 28 | 0 |
| 17 | 3 | 12 | 21 | 37 | 27 | 0 |
| 18 | 4 | 13 | 21 | 36 | 26 | 0 |
| 19 | 4 | 13 | 22 | 35 | 26 | 0 |
| 20 | 4 | 14 | 22 | 34 | 25 | 0 |
| 21 | 5 | 14 | 23 | 34 | 24 | 0 |
| 22 | 5 | 15 | 24 | 34 | 23 | 0 |
| 23 | 5 | 15 | 24 | 33 | 22 | 0 |
| 24 | 6 | 15 | 25 | 33 | 21 | 0 |
| 25 | 6 | 15 | 25 | 34 | 21 | 0 |
| 26 | 6 | 14 | 26 | 34 | 20 | 0 |
| 27 | 6 | 14 | 26 | 35 | 20 | 0 |
| 28 | 6 | 13 | 26 | 36 | 19 | 0 |
| 29 | 6 | 13 | 26 | 36 | 20 | 0 |
| 30 | 5 | 12 | 26 | 37 | 20 | 0 |
| 31 | 5 | 11 | 26 | 38 | 20 | 0 |
Wind in December
Winds average 8 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 8 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in December
Daylight runs from about 11 h 18 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 shrink by about 6 minutes over December. Sunrise moves from 6:32 AM to 6:47 AM, and sunset from 5:49 PM to 6:01 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 |
| Sunrise (AM) | 6:32 | 6:33 | 6:33 | 6:34 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 | 6:37 | 6:38 | 6:38 | 6:39 | 6:39 | 6:40 | 6:40 | 6:41 | 6:41 | 6:42 | 6:42 | 6:43 | 6:43 | 6:44 | 6:44 | 6:44 | 6:45 | 6:45 | 6:46 | 6:46 | 6:47 | 6:47 |
| Sunset (PM) | 5:49 | 5:49 | 5:49 | 5:49 | 5:50 | 5:50 | 5:50 | 5:51 | 5:51 | 5:51 | 5:52 | 5:52 | 5:52 | 5:53 | 5:53 | 5:54 | 5:54 | 5:54 | 5:55 | 5:55 | 5:56 | 5:56 | 5:57 | 5:57 | 5:58 | 5:58 | 5:59 | 5:59 | 6:00 | 6:00 | 6:01 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.3 | 6:32 | 5:49 |
| 2 | 11.3 | 6:33 | 5:49 |
| 3 | 11.3 | 6:33 | 5:49 |
| 4 | 11.3 | 6:34 | 5:49 |
| 5 | 11.3 | 6:34 | 5:50 |
| 6 | 11.3 | 6:35 | 5:50 |
| 7 | 11.2 | 6:35 | 5:50 |
| 8 | 11.2 | 6:36 | 5:51 |
| 9 | 11.2 | 6:36 | 5:51 |
| 10 | 11.2 | 6:37 | 5:51 |
| 11 | 11.2 | 6:38 | 5:52 |
| 12 | 11.2 | 6:38 | 5:52 |
| 13 | 11.2 | 6:39 | 5:52 |
| 14 | 11.2 | 6:39 | 5:53 |
| 15 | 11.2 | 6:40 | 5:53 |
| 16 | 11.2 | 6:40 | 5:54 |
| 17 | 11.2 | 6:41 | 5:54 |
| 18 | 11.2 | 6:41 | 5:54 |
| 19 | 11.2 | 6:42 | 5:55 |
| 20 | 11.2 | 6:42 | 5:55 |
| 21 | 11.2 | 6:43 | 5:56 |
| 22 | 11.2 | 6:43 | 5:56 |
| 23 | 11.2 | 6:44 | 5:57 |
| 24 | 11.2 | 6:44 | 5:57 |
| 25 | 11.2 | 6:44 | 5:58 |
| 26 | 11.2 | 6:45 | 5:58 |
| 27 | 11.2 | 6:45 | 5:59 |
| 28 | 11.2 | 6:46 | 5:59 |
| 29 | 11.2 | 6:46 | 6:00 |
| 30 | 11.2 | 6:47 | 6:00 |
| 31 | 11.2 | 6:47 | 6:01 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 4.78 kWh/m².
For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 6.16 kWh/m² in April across the year — December's 4.78 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.7 | Bright |
| 13 | 4.7 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.9 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.9 | Bright |
| 24 | 4.9 | Bright |
| 25 | 4.9 | Bright |
| 26 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Hazard calendar for Khao Yoi
In December, Khao Yoi sits inside its cyclone season. The full year is below, with each hazard's peak months called out.
Khao Yoi sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Khao Yoi's rainy season runs May–October, when most of the year's rain falls.
Is December a good time to visit Khao Yoi?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Khao Yoi for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Khao Yoi in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Khao Yoi sees daytime highs around 30°C and nights near 22°C. Pack light clothes. Worth having: sun protection.
Sea temperature near Khao Yoi in December
The nearest coast averages about 28°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 35 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 29 | 30 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Khao Yoi in December
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 Khao Yoi peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 9 | 13 | 12 | 12 | 12 | 12 | 14 | 12 | 10 | 9 | 9 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 9 | Very high |
| Mar | 13 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Khao Yoi in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Khao Yoi is worst in February — around 61 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (August, 24 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 58 | 61 | 60 | 47 | 33 | 24 | 24 | 24 | 29 | 46 | 48 | 48 |
| Level | Unhealthy | Unhealthy | Unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 58 | Unhealthy |
| Feb | 61 | Unhealthy |
| Mar | 60 | Unhealthy |
| Apr | 47 | Poor |
| May | 33 | Moderate |
| Jun | 24 | Moderate |
| Jul | 24 | Moderate |
| Aug | 24 | Moderate |
| Sep | 29 | Moderate |
| Oct | 46 | Poor |
| Nov | 48 | Poor |
| Dec | 48 | Poor |
Where is Khao Yoi?
Khao Yoi sits at 13.2°N, 99.8°E, 13 m above sea level, in Thailand. The nearest listed city is Phetchaburi, 19 km away.
Topography around Khao Yoi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Khao Yoi.
Within 3 km, the terrain around Khao Yoi has only modest variations in elevation — a maximum elevation change of 82 m around an average of 11 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 564 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,498 m.
The land around Khao Yoi is covered by cropland (44%) and grassland (24%) within 3 km, trees (31%) and cropland (30%) within 16 km, and trees (50%) and water (25%) within 80 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
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 Khao Yoi (13.2402°, 99.8243°, elevation 13 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).