Subulussalam climate
Subulussalam (Indonesia) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 27 °C80 °F, and about 3,173 mm125 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Subulussalam climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2985 | 2475 | 2780 | 2289.0 |
| Feb | 3085 | 2475 | 2780 | 1817.1 |
| Mar | 3085 | 2476 | 2781 | 2489.8 |
| Apr | 2985 | 2576 | 2781 | 2389.4 |
| May | 3085 | 2577 | 2781 | 2409.5 |
| Jun | 2984 | 2476 | 2780 | 1807.1 |
| Jul | 2984 | 2475 | 2680 | 2278.9 |
| Aug | 2984 | 2475 | 2679 | 26010 |
| Sep | 2984 | 2475 | 2679 | 31112 |
| Oct | 2984 | 2475 | 2679 | 38015 |
| Nov | 2983 | 2475 | 2679 | 36414 |
| Dec | 2984 | 2475 | 2679 | 31512 |
| Year | 3085 | 2475 | 2780 | 3,173125 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 88% | 84% | 5.2 | 11:59 |
| Feb | 87% | 80% | 5.7 | 12:02 |
| Mar | 88% | 82% | 5.7 | 12:06 |
| Apr | 89% | 87% | 5.4 | 12:10 |
| May | 88% | 85% | 5.3 | 12:14 |
| Jun | 88% | 83% | 5.1 | 12:16 |
| Jul | 88% | 86% | 5.0 | 12:16 |
| Aug | 88% | 89% | 5.0 | 12:12 |
| Sep | 89% | 92% | 5.0 | 12:08 |
| Oct | 89% | 93% | 4.9 | 12:03 |
| Nov | 90% | 93% | 4.7 | 11:00 |
| Dec | 89% | 89% | 4.9 | 11:58 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Subulussalam is like
The warmest month is May, with an average high of 30 °C85 °F and a low of 25 °C77 °F. The coldest is September, when highs average 29 °C84 °F and lows 24 °C75 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 0.9 °C1.6 °F.
It is very wet, receiving about 3,173 mm125 in of precipitation per year. The wettest three-month stretch is October–December, which brings 33% of the annual total. The wettest month is October (380 mm15 in), the driest is June (180 mm7.1 in).
Relative humidity ranges from 87% in February to 90% in November. The clearest skies (lowest average cloud amount, 80%) are typical of February. Average wind speed near the ground ranges from 3 km/h (2 mph) in June to 3 km/h (2 mph) in October.
Best time to visit Subulussalam
No month comes close to our comfort ideal here. The least demanding months are February, June and July (average highs 30 °C85 °F, 29 °C84 °F and 29 °C84 °F).
The most challenging month is October, which is very wet (380 mm15 in) and humid (89% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Subulussalam
- Wetter months (September–December) — highs around 29 °C83 °F, lows around 24 °C75 °F, about 343 mm13 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (January–August) — highs 2984 to 30 °C85 °F, lows 2475 to 25 °C77 °F, about 225 mm8.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
How Subulussalam compares
Compared with Medan, about 134 km to the northeast, Subulussalam has practically the same average temperature and receives 39% more precipitation (3,173 mm125 in vs 2,276 mm90 in). The difference is largest in January (0.5 °C1 °F warmer).
Of the 110 places in Indonesia covered by World Climates, Subulussalam is the 74th warmest by annual mean temperature and the 9th wettest by annual precipitation. See all of them on the Indonesia climate page.
Places in other countries with the most similar temperature and rainfall pattern: Kuala Lumpur (Malaysia, Af), Kajang (Malaysia, Af) and Selayang Baru Utara (Malaysia, Af).
Nearby places
- Medan 134 km · 27 °C80 °F · 2,276 mm90 in
- Pematangsiantar 136 km · 24 °C76 °F · 2,724 mm107 in
- Belawan 152 km · 28 °C82 °F · 2,477 mm98 in
- Gunungsitoli 156 km · 28 °C82 °F · 2,936 mm116 in
- Tebingtinggi 160 km · 28 °C82 °F · 2,334 mm92 in
- Langsa 201 km · 28 °C82 °F · 2,347 mm92 in
- Padangsidempuan 210 km · 25 °C77 °F · 4,346 mm171 in
- Tanjungbalai 216 km · 27 °C81 °F · 2,627 mm103 in
Frequently asked questions
What is the warmest month in Subulussalam?
May is the warmest month in Subulussalam, with an average high of 30 °C (85 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Subulussalam?
September is the coldest month, with an average high of 29 °C (84 °F) and an average low of 24 °C (75 °F).
When does it rain the most in Subulussalam?
October is the wettest month with about 380 mm (15.0 in) of precipitation; June is the driest with about 180 mm (7.1 in).
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 468 m, while Subulussalam lies at about 29 m. Temperatures on this page were therefore adjusted by +2.9 °C5.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.