Nam Som in Spring
In spring (March, April and May), Nam Som sees average daytime highs around 34°C and overnight lows near 24°C, with 353 mm of rain over about 43 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 34°C. The sky is clear or mostly clear about 37% of the time across spring, and the air most often feels oppressive.
Spring is Nam Som's 3rd-best season to visit on our travel score. For the whole year in context, see Nam Som's year-round climate.
- Avg daytime high
- 34°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 353 mm
- 43 wet days
- Avg wind
- 6 km/h
- Travel score
- 2.8
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Nam Som in Spring
Across spring, daytime highs hold fairly steady around 34°C.
A typical spring day in Nam Som reaches about 34°C and drops to 24°C overnight. The warmest of the three months is April, the coolest March.
How spring really feels in Nam Som
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.
Nam Som 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 | 29° / 17° | 10 | 1.6 | 11.1 | 7.1 |
| Feb | 31° / 18° | 14 | 2.4 | 11.4 | 5.5 |
| Mar | 34° / 22° | 39 | 6.9 | 11.9 | 3.6 |
| Apr | 35° / 24° | 78 | 12.8 | 12.4 | 2.5 |
| May | 33° / 25° | 236 | 23.1 | 12.8 | 2.3 |
| Jun | 32° / 25° | 231 | 22.8 | 13 | 2.4 |
| Jul | 32° / 25° | 268 | 24.9 | 13 | 2.5 |
| Aug | 31° / 25° | 326 | 26.3 | 12.6 | 2.6 |
| Sep | 31° / 24° | 266 | 24.4 | 12.1 | 2.8 |
| Oct | 31° / 23° | 105 | 12.3 | 11.6 | 4.4 |
| Nov | 30° / 20° | 23 | 2.9 | 11.2 | 6.1 |
| Dec | 28° / 17° | 9 | 1.3 | 11 | 7.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 37% of the time across spring.
Chance of precipitation in Spring
Nam Som gets around 353 mm of rain over 43 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 6 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 36 min in early March to 13 hours 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 5.7 kWh/m².
Hazard calendar for Nam Som
In spring, Nam Som overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Nam Som's monsoon runs May–September, when most of the year's rain falls.
Is spring a good time to visit Nam Som?
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 Nam Som.
What to pack for Nam Som in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Nam Som sees daytime highs around 34°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 43 days see rain.
UV index in Nam Som in Spring
Clear-sky midday UV across spring averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nam Som peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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) | 9 | 10 | 12 | 11 | 11 | 13 | 13 | 13 | 11 | 10 | 8 | 8 |
| 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 | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Nam Som 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 Nam Som is worst in April — around 122 µg/m³ PM2.5 (unhealthy), about 8.3× the cleanest month (November, 15 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) | 22 | 37 | 108 | 122 | 28 | 16 | 15 | 16 | 15 | 16 | 15 | 17 |
| Level | Moderate | Poor | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 37 | Poor |
| Mar | 108 | Unhealthy |
| Apr | 122 | Unhealthy |
| May | 28 | Moderate |
| Jun | 16 | Moderate |
| Jul | 15 | Moderate |
| Aug | 16 | Moderate |
| Sep | 15 | Moderate |
| Oct | 16 | Moderate |
| Nov | 15 | Moderate |
| Dec | 17 | Moderate |
Where is Nam Som?
Nam Som sits at 17.8°N, 102.2°E, 231 m above sea level, in Thailand. The nearest listed city is Tha Bo, 42 km away.
Topography around Nam Som
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nam Som.
Within 3 km, the terrain around Nam Som has only modest variations in elevation — a maximum elevation change of 156 m around an average of 227 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 559 m; within 80 km, large variations in elevation — a maximum elevation change of 951 m.
The land around Nam Som is covered by trees (51%) and cropland (36%) within 3 km, trees (66%) and cropland (28%) within 16 km, and trees (59%) and cropland (34%) 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 Nam Som (17.7704°, 102.1895°, elevation 231 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.