Pematangsiantar in Spring
In spring (March, April and May), Pematangsiantar sees average daytime highs around 29°C and overnight lows near 22°C, with 730 mm of rain over about 84 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across spring, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 2% of the time across spring, and the air most often feels oppressive.
Spring is Pematangsiantar's weakest season of the year to visit on our travel score. Pematangsiantar 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 Pematangsiantar's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 730 mm
- 84 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.0
- weakest season of the year
- Months
- Mar · Apr · May
Temperature in Pematangsiantar in Spring
Across spring, daytime highs hold fairly steady around 29°C.
A typical spring day in Pematangsiantar reaches about 29°C and drops to 22°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Pematangsiantar
Once humidity and wind are folded in, spring brings about 79 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.
Pematangsiantar 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 | 28° / 21° | 240 | 27.9 | 11.8 | 3.5 |
| Feb | 28° / 21° | 189 | 24.1 | 11.9 | 3.4 |
| Mar | 29° / 21° | 217 | 26.5 | 12 | 3.3 |
| Apr | 29° / 22° | 249 | 28.6 | 12.1 | 2.8 |
| May | 30° / 22° | 265 | 29.2 | 12.1 | 2.8 |
| Jun | 30° / 22° | 231 | 27.1 | 12.2 | 3.0 |
| Jul | 29° / 21° | 237 | 26.7 | 12.2 | 3.2 |
| Aug | 29° / 21° | 274 | 28.8 | 12.1 | 3.0 |
| Sep | 29° / 21° | 361 | 29.4 | 12 | 2.9 |
| Oct | 28° / 21° | 375 | 30.2 | 11.9 | 2.9 |
| Nov | 28° / 21° | 351 | 29.4 | 11.9 | 3.2 |
| Dec | 28° / 21° | 315 | 29.6 | 11.8 | 3.3 |
Cloud cover in Spring
The sky is clear or mostly clear about 2% of the time across spring.
Chance of precipitation in Spring
Pematangsiantar gets around 730 mm of rain over 84 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 4 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 54 min in early March to 12 h 12 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 5.0 kWh/m².
Hazard calendar for Pematangsiantar
In spring, Pematangsiantar overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Pematangsiantar sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Is spring a good time to visit Pematangsiantar?
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 Pematangsiantar.
What to pack for Pematangsiantar in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Pematangsiantar sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 84 days see rain.
Sea temperature near Pematangsiantar 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 57 km away) is warmest in June 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 | 29 | 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 | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Pematangsiantar 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 Pematangsiantar peaks around February 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 10 (extreme).
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 | 15 | 14 | 13 | 12 | 10 | 11 | 12 | 14 | 14 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 14 | Extreme |
| Oct | 14 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Pematangsiantar 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 Pematangsiantar is worst in October — around 40 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 31 | 35 | 38 | 36 | 34 | 33 | 33 | 34 | 39 | 40 | 31 | 29 |
| Level | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 31 | Moderate |
| Feb | 35 | Moderate |
| Mar | 38 | Poor |
| Apr | 36 | Poor |
| May | 34 | Moderate |
| Jun | 33 | Moderate |
| Jul | 33 | Moderate |
| Aug | 34 | Moderate |
| Sep | 39 | Poor |
| Oct | 40 | Poor |
| Nov | 31 | Moderate |
| Dec | 29 | Moderate |
Where is Pematangsiantar?
Pematangsiantar sits at 3.0°N, 99.1°E, 388 m above sea level, in Indonesia. The nearest listed city is Pekan Bahapal, 21 km away.
Topography around Pematangsiantar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Pematangsiantar.
Within 3 km, the terrain around Pematangsiantar has only modest variations in elevation — a maximum elevation change of 130 m around an average of 382 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,193 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,429 m.
The land around Pematangsiantar is covered by artificial surfaces (56%) and trees (30%) within 3 km, trees (77%) within 16 km, and trees (70%) 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 Pematangsiantar (2.9595°, 99.0687°, elevation 388 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.