Dumai in Spring
In spring (March, April and May), Dumai sees average daytime highs around 32°C and overnight lows near 25°C, with 690 mm of rain over about 79 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across spring, daytime highs hold fairly steady around 32°C. The sky is clear or mostly clear about 4% of the time across spring, and the air most often feels miserable.
Spring is Dumai's weakest season of the year to visit on our travel score. Dumai has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Dumai's year-round climate.
- Avg daytime high
- 32°C
- warmest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 690 mm
- 79 wet days
- Avg wind
- 5 km/h
- Travel score
- 2.3
- weakest season of the year
- Months
- Mar · Apr · May
Temperature in Dumai in Spring
Across spring, daytime highs hold fairly steady around 32°C.
A typical spring day in Dumai reaches about 32°C and drops to 25°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Dumai
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.
Dumai 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° / 24° | 201 | 21.3 | 11.9 | 3.3 |
| Feb | 32° / 25° | 123 | 16.8 | 11.9 | 3.2 |
| Mar | 32° / 25° | 217 | 25.1 | 12 | 2.5 |
| Apr | 32° / 25° | 249 | 27.6 | 12 | 2.2 |
| May | 32° / 25° | 224 | 26.3 | 12.1 | 2.3 |
| Jun | 32° / 25° | 156 | 21.3 | 12.1 | 2.7 |
| Jul | 32° / 24° | 162 | 20.4 | 12.1 | 3.0 |
| Aug | 32° / 24° | 195 | 24 | 12.1 | 2.7 |
| Sep | 32° / 24° | 253 | 26.1 | 12 | 2.5 |
| Oct | 31° / 24° | 308 | 28.2 | 12 | 2.4 |
| Nov | 31° / 24° | 387 | 28.5 | 11.9 | 2.4 |
| Dec | 31° / 24° | 343 | 27.7 | 11.9 | 2.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 4% of the time across spring.
Chance of precipitation in Spring
Dumai gets around 690 mm of rain over 79 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 5 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 12 hours in early March to 12 h 06 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 5.1 kWh/m².
Is spring a good time to visit Dumai?
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 Dumai.
What to pack for Dumai in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Dumai sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 79 days see rain.
Sea temperature near Dumai 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 48 km away) is warmest in May at about 30°C and coldest in January near 29°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) | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 30 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Dumai in Spring
Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dumai peaks around February 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 10 (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) | 13 | 14 | 13 | 13 | 12 | 10 | 10 | 12 | 13 | 14 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 14 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Dumai 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 Dumai is worst in September — around 43 µg/m³ PM2.5 (poor), about 2.9× the cleanest month (December, 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) | 18 | 31 | 36 | 26 | 20 | 21 | 37 | 42 | 43 | 30 | 15 | 15 |
| Level | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 31 | Moderate |
| Mar | 36 | Poor |
| Apr | 26 | Moderate |
| May | 20 | Moderate |
| Jun | 21 | Moderate |
| Jul | 37 | Poor |
| Aug | 42 | Poor |
| Sep | 43 | Poor |
| Oct | 30 | Moderate |
| Nov | 15 | Moderate |
| Dec | 15 | Moderate |
Where is Dumai?
Dumai sits at 1.7°N, 101.4°E, 7 m above sea level, in Indonesia. The nearest listed city is Balai Pungut, 70 km away.
Topography around Dumai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dumai.
Within 3 km, the terrain around Dumai has only modest variations in elevation — a maximum elevation change of 27 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, only modest variations in elevation — a maximum elevation change of 77 m.
The land around Dumai is covered by artificial surfaces (51%) and trees (31%) within 3 km, trees (66%) and water (20%) within 16 km, and trees (64%) and water (29%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- 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 Dumai (1.6671°, 101.4432°, elevation 7 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.