Pematangsiantar weather in May
In May, Pematangsiantar sees average daytime highs of 30°C and overnight lows near 22°C, with 265 mm of rain across 29.2 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 1% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 12 h 06 min at the start of May to 12 h 12 min by month's end. Set against the rest of the year, May is Pematangsiantar's 7th-clearest and 7th-windiest month. For the whole year in context, see Pematangsiantar's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 22°
- 12th coldest
- Rainfall
- 265 mm
- 29.2 wet days
- Daylight
- 12 h 06 min
- 6:16 AM – 6:24 PM
- Cloud cover
- 89%
- 7th clearest
- Wind
- 4 km/h
- 7th windiest
- Solar energy
- 4.89 kWh/m²
- Travel score
- 2.8
- out of 10
Pematangsiantar is city in North Sumatra Province, Indonesia.
- Density
- 3,491/km²
- people per km²
- Founded
- 1871
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Day-to-day highs hold fairly steady near 30°C through the month.
A typical May day in Pematangsiantar reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs on par with April and on par with June.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 22 |
| 2 | 29 | 22 |
| 3 | 29 | 22 |
| 4 | 29 | 22 |
| 5 | 29 | 22 |
| 6 | 29 | 22 |
| 7 | 30 | 22 |
| 8 | 30 | 22 |
| 9 | 30 | 22 |
| 10 | 30 | 22 |
| 11 | 30 | 22 |
| 12 | 30 | 22 |
| 13 | 30 | 22 |
| 14 | 30 | 22 |
| 15 | 30 | 22 |
| 16 | 30 | 22 |
| 17 | 30 | 22 |
| 18 | 30 | 22 |
| 19 | 30 | 22 |
| 20 | 30 | 22 |
| 21 | 30 | 22 |
| 22 | 30 | 22 |
| 23 | 30 | 22 |
| 24 | 30 | 22 |
| 25 | 30 | 22 |
| 26 | 30 | 22 |
| 27 | 30 | 22 |
| 28 | 30 | 22 |
| 29 | 30 | 22 |
| 30 | 30 | 22 |
| 31 | 30 | 22 |
How May really feels in Pematangsiantar
Once humidity and wind are folded in, May averages 31 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Pematangsiantar weather by month
How May compares with the rest of the year at a glance. May is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.
| 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 May
The sky is clear or mostly clear about 1% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 5% of May, with mostly cloudy or overcast conditions the remaining 94%.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Cloudier (%) | 96 | 96 | 96 | 96 | 95 | 95 | 95 | 95 | 95 | 95 | 93 | 93 | 93 | 93 | 93 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 93 | 93 | 93 | 93 | 93 | 93 | 93 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 4 | 96 |
| 2 | 4 | 96 |
| 3 | 4 | 96 |
| 4 | 4 | 96 |
| 5 | 5 | 95 |
| 6 | 5 | 95 |
| 7 | 5 | 95 |
| 8 | 5 | 95 |
| 9 | 5 | 95 |
| 10 | 5 | 95 |
| 11 | 7 | 93 |
| 12 | 7 | 93 |
| 13 | 7 | 93 |
| 14 | 7 | 93 |
| 15 | 7 | 93 |
| 16 | 8 | 92 |
| 17 | 8 | 92 |
| 18 | 8 | 92 |
| 19 | 8 | 92 |
| 20 | 8 | 92 |
| 21 | 8 | 92 |
| 22 | 8 | 92 |
| 23 | 8 | 92 |
| 24 | 8 | 92 |
| 25 | 7 | 93 |
| 26 | 7 | 93 |
| 27 | 7 | 93 |
| 28 | 7 | 93 |
| 29 | 7 | 93 |
| 30 | 7 | 93 |
| 31 | 7 | 93 |
Chance of precipitation in May
Pematangsiantar gets around 265 mm of rain over 29.2 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 94% and peaks near 97% on the wettest days.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 97 | 97 | 96 | 96 | 96 | 96 | 95 | 95 | 94 | 94 | 94 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 93 |
| Rain chance (%) | |
|---|---|
| 1 | 97 |
| 2 | 97 |
| 3 | 96 |
| 4 | 96 |
| 5 | 96 |
| 6 | 96 |
| 7 | 95 |
| 8 | 95 |
| 9 | 94 |
| 10 | 94 |
| 11 | 94 |
| 12 | 93 |
| 13 | 93 |
| 14 | 93 |
| 15 | 93 |
| 16 | 93 |
| 17 | 93 |
| 18 | 93 |
| 19 | 93 |
| 20 | 94 |
| 21 | 94 |
| 22 | 94 |
| 23 | 94 |
| 24 | 94 |
| 25 | 94 |
| 26 | 94 |
| 27 | 94 |
| 28 | 94 |
| 29 | 94 |
| 30 | 94 |
| 31 | 93 |
Humidity in May
Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the oppressive band about 99% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
| Oppressive (%) | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 99 | 99 | 100 | 100 | 99 | 99 | 99 | 99 | 99 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 0 | 100 | 0 |
| 2 | 0 | 100 | 0 |
| 3 | 0 | 100 | 0 |
| 4 | 0 | 100 | 0 |
| 5 | 0 | 100 | 0 |
| 6 | 0 | 99 | 1 |
| 7 | 0 | 99 | 1 |
| 8 | 0 | 99 | 1 |
| 9 | 1 | 98 | 1 |
| 10 | 1 | 98 | 1 |
| 11 | 1 | 98 | 1 |
| 12 | 1 | 98 | 1 |
| 13 | 1 | 98 | 1 |
| 14 | 1 | 98 | 1 |
| 15 | 1 | 98 | 1 |
| 16 | 1 | 98 | 1 |
| 17 | 1 | 98 | 1 |
| 18 | 1 | 98 | 1 |
| 19 | 1 | 98 | 1 |
| 20 | 1 | 98 | 1 |
| 21 | 1 | 98 | 1 |
| 22 | 1 | 98 | 1 |
| 23 | 0 | 99 | 1 |
| 24 | 0 | 99 | 1 |
| 25 | 0 | 100 | 0 |
| 26 | 0 | 100 | 0 |
| 27 | 1 | 99 | 0 |
| 28 | 1 | 99 | 0 |
| 29 | 1 | 99 | 0 |
| 30 | 1 | 99 | 0 |
| 31 | 1 | 99 | 0 |
Wind in May
Winds average 4 km/h in May.
Across May, daily wind ranges from about 4 km/h on the calmest days to 4 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| 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 | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
| 31 | 4 | calm |
Sunrise & sunset in May
Daylight runs from about 12 h 06 min at the start of May to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over May. Sunrise moves from 6:18 AM to 6:16 AM, and sunset from 6:24 PM to 6:26 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 |
| Sunrise (AM) | 6:18 | 6:18 | 6:17 | 6:17 | 6:17 | 6:17 | 6:17 | 6:17 | 6:17 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 |
| Sunset (PM) | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 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 | 6:26 | 6:26 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.1 | 6:18 | 6:24 |
| 2 | 12.1 | 6:18 | 6:24 |
| 3 | 12.1 | 6:17 | 6:24 |
| 4 | 12.1 | 6:17 | 6:24 |
| 5 | 12.1 | 6:17 | 6:24 |
| 6 | 12.1 | 6:17 | 6:24 |
| 7 | 12.1 | 6:17 | 6:24 |
| 8 | 12.1 | 6:17 | 6:24 |
| 9 | 12.1 | 6:17 | 6:24 |
| 10 | 12.1 | 6:16 | 6:24 |
| 11 | 12.1 | 6:16 | 6:24 |
| 12 | 12.1 | 6:16 | 6:24 |
| 13 | 12.1 | 6:16 | 6:24 |
| 14 | 12.1 | 6:16 | 6:24 |
| 15 | 12.1 | 6:16 | 6:24 |
| 16 | 12.1 | 6:16 | 6:24 |
| 17 | 12.1 | 6:16 | 6:24 |
| 18 | 12.1 | 6:16 | 6:24 |
| 19 | 12.1 | 6:16 | 6:24 |
| 20 | 12.1 | 6:16 | 6:24 |
| 21 | 12.1 | 6:16 | 6:24 |
| 22 | 12.1 | 6:16 | 6:25 |
| 23 | 12.1 | 6:16 | 6:25 |
| 24 | 12.1 | 6:16 | 6:25 |
| 25 | 12.1 | 6:16 | 6:25 |
| 26 | 12.2 | 6:16 | 6:25 |
| 27 | 12.2 | 6:16 | 6:25 |
| 28 | 12.2 | 6:16 | 6:25 |
| 29 | 12.2 | 6:16 | 6:25 |
| 30 | 12.2 | 6:16 | 6:26 |
| 31 | 12.2 | 6:16 | 6:26 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 4.89 kWh/m².
For context, solar energy here swings from a low near 3.99 kWh/m² to a high of 5.21 kWh/m² in March across the year — May's 4.89 kWh/m² falls in the middle.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.8 | Bright |
| 2 | 4.8 | Bright |
| 3 | 4.8 | Bright |
| 4 | 4.8 | Bright |
| 5 | 4.8 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.8 | Bright |
| 8 | 4.8 | Bright |
| 9 | 4.8 | Bright |
| 10 | 4.8 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.9 | Bright |
| 13 | 4.9 | Bright |
| 14 | 4.9 | Bright |
| 15 | 4.9 | Bright |
| 16 | 4.9 | Bright |
| 17 | 4.9 | Bright |
| 18 | 4.9 | Bright |
| 19 | 4.9 | Bright |
| 20 | 4.9 | Bright |
| 21 | 5.0 | Bright |
| 22 | 5.0 | Bright |
| 23 | 5.0 | Bright |
| 24 | 5.0 | Bright |
| 25 | 4.9 | Bright |
| 26 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Hazard calendar for Pematangsiantar
In May, Pematangsiantar sits inside 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 May a good time to visit Pematangsiantar?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a weaker month for outdoor sightseeing in Pematangsiantar.
What to pack for Pematangsiantar in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Pematangsiantar sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.
Sea temperature near Pematangsiantar in May
The nearest coast averages about 30°C in May — 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 May
Clear-sky midday UV in May 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 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 May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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. 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).