Si Racha weather in April
In April, Si Racha sees average daytime highs of 34°C and overnight lows near 27°C, with 90 mm of rain across 14.1 wet days and about 12.3 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 34% of the time in April, and the air most often feels miserable.
Daylight stretches from about 12 h 06 min at the start of April to 12 h 30 min by month's end. Set against the rest of the year, April is Si Racha's 5th-clearest and 6th-windiest month. For the whole year in context, see Si Racha's year-round climate.
- Daytime high
- 34°
- 1st warmest
- Overnight low
- 27°
- 10th coldest
- Rainfall
- 90 mm
- 14.1 wet days
- Daylight
- 12 h 18 min
- 6:08 AM – 6:25 PM
- Cloud cover
- 57%
- 5th clearest
- Wind
- 10 km/h
- 6th windiest
- Solar energy
- 5.98 kWh/m²
- Travel score
- 2.8
- out of 10
Si Racha is town in Chon Buri province, Thailand.
- Density
- 44,090/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 34°C through the month.
A typical April day in Si Racha reaches about 34°C in the afternoon and slips back to 27°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 36°C. Set against its neighbours, April runs on par with March and on par with May.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
| Avg low (°C) | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 34 | 26 |
| 2 | 34 | 26 |
| 3 | 34 | 26 |
| 4 | 34 | 27 |
| 5 | 34 | 27 |
| 6 | 34 | 27 |
| 7 | 34 | 27 |
| 8 | 34 | 27 |
| 9 | 34 | 27 |
| 10 | 34 | 27 |
| 11 | 34 | 27 |
| 12 | 34 | 27 |
| 13 | 34 | 27 |
| 14 | 34 | 27 |
| 15 | 34 | 27 |
| 16 | 34 | 27 |
| 17 | 34 | 27 |
| 18 | 34 | 27 |
| 19 | 34 | 27 |
| 20 | 34 | 27 |
| 21 | 34 | 27 |
| 22 | 34 | 27 |
| 23 | 34 | 27 |
| 24 | 34 | 27 |
| 25 | 34 | 27 |
| 26 | 34 | 27 |
| 27 | 34 | 27 |
| 28 | 34 | 27 |
| 29 | 34 | 27 |
| 30 | 34 | 27 |
How April really feels in Si Racha
Once humidity and wind are folded in, April averages 30 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 April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Si Racha weather by month
How April compares with the rest of the year at a glance. April is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 23° | 22 | 4.7 | 11.3 | 4.8 |
| Feb | 32° / 24° | 23 | 5.1 | 11.6 | 4.3 |
| Mar | 33° / 26° | 58 | 10.7 | 11.9 | 3.5 |
| Apr | 34° / 27° | 90 | 14.1 | 12.3 | 2.8 |
| May | 33° / 27° | 145 | 21.3 | 12.6 | 2.4 |
| Jun | 33° / 27° | 123 | 20.9 | 12.8 | 2.6 |
| Jul | 32° / 27° | 133 | 22.5 | 12.7 | 2.7 |
| Aug | 32° / 27° | 136 | 23.3 | 12.4 | 2.7 |
| Sep | 31° / 26° | 232 | 25.1 | 12.1 | 2.5 |
| Oct | 31° / 25° | 195 | 21.7 | 11.7 | 3.1 |
| Nov | 32° / 24° | 44 | 7.1 | 11.4 | 4.3 |
| Dec | 31° / 23° | 12 | 2.7 | 11.2 | 5.0 |
Cloud cover in April
The sky is clear or mostly clear about 34% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 59 | 59 | 58 | 58 | 57 | 56 | 56 | 55 | 54 | 54 | 54 | 53 | 53 | 54 | 54 | 53 | 53 | 52 | 52 | 51 | 52 | 51 | 50 | 49 | 49 | 47 | 46 | 44 | 43 | 40 |
| Cloudier (%) | 41 | 41 | 42 | 42 | 43 | 44 | 44 | 45 | 46 | 46 | 46 | 47 | 47 | 46 | 46 | 47 | 47 | 48 | 48 | 49 | 48 | 49 | 50 | 51 | 51 | 53 | 54 | 56 | 57 | 60 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 59 | 41 |
| 3 | 58 | 42 |
| 4 | 58 | 42 |
| 5 | 57 | 43 |
| 6 | 56 | 44 |
| 7 | 56 | 44 |
| 8 | 55 | 45 |
| 9 | 54 | 46 |
| 10 | 54 | 46 |
| 11 | 54 | 46 |
| 12 | 53 | 47 |
| 13 | 53 | 47 |
| 14 | 54 | 46 |
| 15 | 54 | 46 |
| 16 | 53 | 47 |
| 17 | 53 | 47 |
| 18 | 52 | 48 |
| 19 | 52 | 48 |
| 20 | 51 | 49 |
| 21 | 52 | 48 |
| 22 | 51 | 49 |
| 23 | 50 | 50 |
| 24 | 49 | 51 |
| 25 | 49 | 51 |
| 26 | 47 | 53 |
| 27 | 46 | 54 |
| 28 | 44 | 56 |
| 29 | 43 | 57 |
| 30 | 40 | 60 |
Chance of precipitation in April
Si Racha gets around 90 mm of rain over 14.1 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 47% and peaks near 59% on the wettest days. The odds climb toward the end of the month.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 44 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 42 | 43 | 43 | 44 | 44 | 45 | 46 | 47 | 49 | 50 | 51 | 52 | 54 | 55 | 56 | 57 | 59 |
| Rain chance (%) | |
|---|---|
| 1 | 44 |
| 2 | 43 |
| 3 | 43 |
| 4 | 43 |
| 5 | 43 |
| 6 | 44 |
| 7 | 44 |
| 8 | 44 |
| 9 | 43 |
| 10 | 43 |
| 11 | 43 |
| 12 | 43 |
| 13 | 43 |
| 14 | 42 |
| 15 | 43 |
| 16 | 43 |
| 17 | 44 |
| 18 | 44 |
| 19 | 45 |
| 20 | 46 |
| 21 | 47 |
| 22 | 49 |
| 23 | 50 |
| 24 | 51 |
| 25 | 52 |
| 26 | 54 |
| 27 | 55 |
| 28 | 56 |
| 29 | 57 |
| 30 | 59 |
Humidity in April
Most of April feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the miserable band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 1 | 1 | 1 | 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 | 0 | 0 |
| Muggy (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Oppressive (%) | 21 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 |
| Miserable (%) | 76 | 77 | 78 | 78 | 79 | 79 | 80 | 80 | 82 | 83 | 84 | 84 | 84 | 85 | 85 | 86 | 86 | 86 | 87 | 87 | 88 | 89 | 90 | 90 | 91 | 91 | 91 | 92 | 92 | 92 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 1 | 2 | 21 | 76 |
| 2 | 1 | 2 | 20 | 77 |
| 3 | 1 | 2 | 19 | 78 |
| 4 | 1 | 2 | 19 | 78 |
| 5 | 1 | 2 | 18 | 79 |
| 6 | 1 | 2 | 18 | 79 |
| 7 | 1 | 2 | 17 | 80 |
| 8 | 1 | 2 | 17 | 80 |
| 9 | 0 | 2 | 16 | 82 |
| 10 | 0 | 1 | 16 | 83 |
| 11 | 0 | 1 | 15 | 84 |
| 12 | 0 | 1 | 15 | 84 |
| 13 | 0 | 1 | 15 | 84 |
| 14 | 0 | 1 | 14 | 85 |
| 15 | 0 | 1 | 14 | 85 |
| 16 | 0 | 1 | 13 | 86 |
| 17 | 0 | 1 | 13 | 86 |
| 18 | 0 | 1 | 13 | 86 |
| 19 | 0 | 1 | 12 | 87 |
| 20 | 0 | 1 | 12 | 87 |
| 21 | 0 | 1 | 11 | 88 |
| 22 | 0 | 0 | 11 | 89 |
| 23 | 0 | 0 | 10 | 90 |
| 24 | 0 | 0 | 10 | 90 |
| 25 | 0 | 0 | 9 | 91 |
| 26 | 0 | 0 | 9 | 91 |
| 27 | 0 | 0 | 9 | 91 |
| 28 | 0 | 0 | 8 | 92 |
| 29 | 0 | 0 | 8 | 92 |
| 30 | 0 | 0 | 8 | 92 |
Wind in April
Winds average 10 km/h in April.
Across April, daily wind ranges from about 9 km/h on the calmest days to 10 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 10 | calm |
| 18 | 10 | calm |
| 19 | 10 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 10 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 06 min at the start of April to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over April. Sunrise moves from 6:18 AM to 6:00 AM, and sunset from 6:24 PM to 6:27 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 |
| Sunrise (AM) | 6:18 | 6:17 | 6:16 | 6:16 | 6:15 | 6:14 | 6:14 | 6:13 | 6:12 | 6:12 | 6:11 | 6:10 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:06 | 6:06 | 6:05 | 6:05 | 6:04 | 6:04 | 6:03 | 6:03 | 6:02 | 6:02 | 6:01 | 6:01 | 6:00 |
| Sunset (PM) | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.1 | 6:18 | 6:24 |
| 2 | 12.1 | 6:17 | 6:24 |
| 3 | 12.1 | 6:16 | 6:24 |
| 4 | 12.1 | 6:16 | 6:24 |
| 5 | 12.2 | 6:15 | 6:24 |
| 6 | 12.2 | 6:14 | 6:25 |
| 7 | 12.2 | 6:14 | 6:25 |
| 8 | 12.2 | 6:13 | 6:25 |
| 9 | 12.2 | 6:12 | 6:25 |
| 10 | 12.2 | 6:12 | 6:25 |
| 11 | 12.2 | 6:11 | 6:25 |
| 12 | 12.2 | 6:10 | 6:25 |
| 13 | 12.3 | 6:10 | 6:25 |
| 14 | 12.3 | 6:09 | 6:25 |
| 15 | 12.3 | 6:08 | 6:25 |
| 16 | 12.3 | 6:08 | 6:25 |
| 17 | 12.3 | 6:07 | 6:25 |
| 18 | 12.3 | 6:06 | 6:26 |
| 19 | 12.3 | 6:06 | 6:26 |
| 20 | 12.3 | 6:05 | 6:26 |
| 21 | 12.4 | 6:05 | 6:26 |
| 22 | 12.4 | 6:04 | 6:26 |
| 23 | 12.4 | 6:04 | 6:26 |
| 24 | 12.4 | 6:03 | 6:26 |
| 25 | 12.4 | 6:03 | 6:26 |
| 26 | 12.4 | 6:02 | 6:27 |
| 27 | 12.4 | 6:02 | 6:27 |
| 28 | 12.4 | 6:01 | 6:27 |
| 29 | 12.4 | 6:01 | 6:27 |
| 30 | 12.5 | 6:00 | 6:27 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.98 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 5.98 kWh/m² in April across the year — April's 5.98 kWh/m² sits near the top of that range.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.8 |
| Level | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.0 | Bright |
| 2 | 6.0 | Bright |
| 3 | 6.0 | Bright |
| 4 | 6.0 | Bright |
| 5 | 6.0 | Intense |
| 6 | 6.0 | Intense |
| 7 | 6.0 | Intense |
| 8 | 6.0 | Intense |
| 9 | 6.0 | Intense |
| 10 | 6.0 | Intense |
| 11 | 6.0 | Intense |
| 12 | 6.0 | Intense |
| 13 | 6.0 | Intense |
| 14 | 6.0 | Intense |
| 15 | 6.0 | Intense |
| 16 | 6.0 | Intense |
| 17 | 6.0 | Intense |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Bright |
| 20 | 6.0 | Bright |
| 21 | 6.0 | Bright |
| 22 | 6.0 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.9 | Bright |
| 26 | 5.9 | Bright |
| 27 | 5.8 | Bright |
| 28 | 5.8 | Bright |
| 29 | 5.8 | Bright |
| 30 | 5.8 | Bright |
Hazard calendar for Si Racha
In April, Si Racha sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Si Racha sits in the Pacific typhoon belt; the season peaks July–October.
Si Racha's rainy season runs May–October, when most of the year's rain falls.
Is April a good time to visit Si Racha?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Si Racha.
What to pack for Si Racha in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Si Racha sees daytime highs around 34°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.
Sea temperature near Si Racha in April
The nearest coast averages about 30°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in May at about 31°C and coldest in January near 28°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) | 28 | 28 | 29 | 30 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Si Racha in April
Clear-sky midday UV in April peaks around 12 (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 Racha peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 | 10 | 12 | 12 | 12 | 12 | 12 | 14 | 12 | 10 | 9 | 9 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Si Racha in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Si Racha is worst in January — around 67 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (June, 34 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) | 67 | 65 | 53 | 47 | 40 | 34 | 36 | 36 | 47 | 57 | 53 | 47 |
| Level | Unhealthy | Unhealthy | Poor | Poor | Poor | Moderate | Poor | Poor | Poor | Unhealthy | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 67 | Unhealthy |
| Feb | 65 | Unhealthy |
| Mar | 53 | Poor |
| Apr | 47 | Poor |
| May | 40 | Poor |
| Jun | 34 | Moderate |
| Jul | 36 | Poor |
| Aug | 36 | Poor |
| Sep | 47 | Poor |
| Oct | 57 | Unhealthy |
| Nov | 53 | Poor |
| Dec | 47 | Poor |
Where is Si Racha?
Si Racha sits at 13.2°N, 100.9°E, in Thailand. The nearest listed city is Ban Talat Bueng, 14 km away.
Topography around Si Racha
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Si Racha.
Within 3 km, the terrain around Si Racha has significant variations in elevation — a maximum elevation change of 302 m around an average of 31 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 773 m; within 80 km, large variations in elevation — a maximum elevation change of 874 m.
The land around Si Racha is covered by water (33%), trees (30%) and artificial surfaces (30%) within 3 km, water (42%), trees (24%) and artificial surfaces (20%) within 16 km, and water (42%) and trees (32%) 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 Si Racha (13.1728°, 100.9316°), 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).