Ratchaburi in Spring
In spring (March, April and May), Ratchaburi sees average daytime highs around 35°C and overnight lows near 26°C, with 232 mm of rain over about 40 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 35°C. The sky is clear or mostly clear about 33% of the time across spring, and the air most often feels oppressive.
Spring is Ratchaburi's weakest season of the year to visit on our travel score. For the whole year in context, see Ratchaburi's year-round climate.
- Avg daytime high
- 35°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 232 mm
- 40 wet days
- Avg wind
- 7 km/h
- Travel score
- 2.2
- weakest season of the year
- Months
- Mar · Apr · May
Temperature in Ratchaburi in Spring
Across spring, daytime highs hold fairly steady around 35°C.
A typical spring day in Ratchaburi reaches about 35°C and drops to 26°C overnight. The warmest of the three months is April, the coolest March.
How spring really feels in Ratchaburi
Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Ratchaburi weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 22° | 12 | 2.2 | 11.3 | 5.3 |
| Feb | 33° / 23° | 10 | 2.4 | 11.5 | 4.2 |
| Mar | 35° / 25° | 37 | 6.4 | 11.9 | 3.0 |
| Apr | 36° / 27° | 68 | 11.2 | 12.3 | 1.9 |
| May | 35° / 27° | 127 | 21.9 | 12.6 | 1.7 |
| Jun | 34° / 27° | 114 | 20.5 | 12.8 | 2.1 |
| Jul | 33° / 26° | 133 | 22.1 | 12.7 | 2.3 |
| Aug | 33° / 26° | 143 | 23.1 | 12.4 | 2.4 |
| Sep | 32° / 26° | 197 | 24.1 | 12.1 | 2.3 |
| Oct | 32° / 25° | 188 | 21.1 | 11.7 | 3.2 |
| Nov | 31° / 24° | 45 | 6.4 | 11.4 | 4.6 |
| Dec | 31° / 22° | 10 | 2.2 | 11.2 | 5.5 |
Cloud cover in Spring
The sky is clear or mostly clear about 33% of the time across spring.
Chance of precipitation in Spring
Ratchaburi gets around 232 mm of rain over 40 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 42 min in early March to 12 h 42 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².
Hazard calendar for Ratchaburi
In spring, Ratchaburi overlaps its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.
Ratchaburi sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Ratchaburi's monsoon runs May–October, when most of the year's rain falls.
Is spring a good time to visit Ratchaburi?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Ratchaburi.
What to pack for Ratchaburi in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Ratchaburi sees daytime highs around 35°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 40 days see rain.
Sea temperature near Ratchaburi in Spring
The nearest coast averages about 30°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 38 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 | 30 | 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 | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Ratchaburi in Spring
Clear-sky midday UV across spring averages 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 Ratchaburi peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 20 at about 8 (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) | 8 | 9 | 12 | 11 | 11 | 12 | 12 | 13 | 12 | 10 | 8 | 9 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 9 | Very high |
| Mar | 12 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 9 | Very high |
Air quality in Ratchaburi in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Ratchaburi is worst in February — around 44 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (August, 17 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Ratchaburi's WHO annual average of 30 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 42 | 44 | 43 | 33 | 23 | 17 | 17 | 17 | 21 | 33 | 35 | 34 |
| Level | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 42 | Poor |
| Feb | 44 | Poor |
| Mar | 43 | Poor |
| Apr | 33 | Moderate |
| May | 23 | Moderate |
| Jun | 17 | Moderate |
| Jul | 17 | Moderate |
| Aug | 17 | Moderate |
| Sep | 21 | Moderate |
| Oct | 33 | Moderate |
| Nov | 35 | Moderate |
| Dec | 34 | Moderate |
Where is Ratchaburi?
Ratchaburi sits at 13.5°N, 99.8°E, 8 m above sea level, in Thailand. The nearest listed city is Damnoen Saduak, 15 km away.
Topography around Ratchaburi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ratchaburi.
Within 3 km, the terrain around Ratchaburi has only modest variations in elevation — a maximum elevation change of 43 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 231 m; within 80 km, large variations in elevation — a maximum elevation change of 1,189 m.
The land around Ratchaburi is covered by artificial surfaces (47%) and trees (27%) within 3 km, trees (50%) and cropland (29%) within 16 km, and trees (44%) and cropland (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 Ratchaburi (13.5367°, 99.8171°, elevation 8 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.