Belawan climate
Belawan (Indonesia) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 28 °C82 °F, and about 2,477 mm98 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Belawan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2882 | 2680 | 2781 | 1606.3 |
| Feb | 2983 | 2780 | 2882 | 943.7 |
| Mar | 2984 | 2781 | 2883 | 1656.5 |
| Apr | 2985 | 2882 | 2883 | 1495.9 |
| May | 2985 | 2882 | 2984 | 2007.9 |
| Jun | 2985 | 2882 | 2983 | 1445.7 |
| Jul | 2985 | 2781 | 2883 | 1807.1 |
| Aug | 2984 | 2781 | 2883 | 2208.7 |
| Sep | 2984 | 2781 | 2882 | 28611 |
| Oct | 2883 | 2780 | 2882 | 32713 |
| Nov | 2883 | 2780 | 2781 | 26610 |
| Dec | 2882 | 2680 | 2781 | 28711 |
| Year | 2985 | 2680 | 2882 | 2,47798 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 81% | 87% | 4.5 | 11:55 |
| Feb | 79% | 81% | 4.9 | 11:00 |
| Mar | 79% | 83% | 5.2 | 12:05 |
| Apr | 79% | 88% | 5.0 | 12:12 |
| May | 79% | 90% | 4.8 | 12:17 |
| Jun | 77% | 86% | 4.9 | 12:20 |
| Jul | 77% | 88% | 4.8 | 12:19 |
| Aug | 77% | 91% | 4.8 | 12:14 |
| Sep | 79% | 93% | 4.6 | 12:08 |
| Oct | 81% | 94% | 4.4 | 12:02 |
| Nov | 82% | 95% | 4.2 | 11:57 |
| Dec | 83% | 92% | 4.1 | 11:54 |
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 Belawan is like
The warmest month is May, with an average high of 29 °C85 °F and a low of 28 °C82 °F. The coldest is December, when highs average 28 °C82 °F and lows 26 °C80 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 1.5 °C2.6 °F.
It is very wet, receiving about 2,477 mm98 in of precipitation per year. The wettest three-month stretch is October–December, which brings 36% of the annual total. The wettest month is October (327 mm13 in), the driest is February (94 mm3.7 in).
Relative humidity ranges from 77% in June to 83% in December. The clearest skies (lowest average cloud amount, 81%) are typical of February. Average wind speed near the ground ranges from 7 km/h (4 mph) in June to 9 km/h (6 mph) in December.
Best time to visit Belawan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are February: average highs of 29 °C83 °F to 29 °C83 °F with 94 mm3.7 in to 94 mm3.7 in of precipitation per month.
The most challenging month is October, which is very wet (327 mm13 in) and humid (81% 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 Belawan
- Wetter months (August–December) — highs 2882 to 29 °C84 °F, lows 2680 to 27 °C81 °F, about 277 mm11 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–July) — highs 2882 to 29 °C85 °F, lows 2680 to 28 °C82 °F, about 156 mm6.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Belawan compares
Compared with Medan, about 21 km to the south, Belawan is on average 1.2 °C2.1 °F warmer and receives 9% more precipitation (2,477 mm98 in vs 2,276 mm90 in). The difference is largest in June (1.4 °C2.4 °F warmer).
Of the 110 places in Indonesia covered by World Climates, Belawan is the 12th warmest by annual mean temperature and the 35th 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: Taiping (Malaysia, Af), Sitiawan (Malaysia, Af) and Kota Kuala Muda (Malaysia, Af).
Nearby places
- Medan 21 km · 27 °C80 °F · 2,276 mm90 in
- Tebingtinggi 73 km · 28 °C82 °F · 2,334 mm92 in
- Pematangsiantar 100 km · 24 °C76 °F · 2,724 mm107 in
- Langsa 111 km · 28 °C82 °F · 2,347 mm92 in
- Subulussalam 152 km · 27 °C80 °F · 3,173 mm125 in
- Tanjungbalai 153 km · 27 °C81 °F · 2,627 mm103 in
- Rantauprapat 226 km · 26 °C79 °F · 3,879 mm153 in
- Sitiawan 229 km · 28 °C82 °F · 2,519 mm99 in
Frequently asked questions
What is the warmest month in Belawan?
May is the warmest month in Belawan, with an average high of 29 °C (85 °F) and an average low of 28 °C (82 °F).
What is the coldest month in Belawan?
December is the coldest month, with an average high of 28 °C (82 °F) and an average low of 26 °C (80 °F).
When does it rain the most in Belawan?
October is the wettest month with about 327 mm (12.9 in) of precipitation; February is the driest with about 94 mm (3.7 in).
What is the best time to visit Belawan?
Judging by long-term averages, the most comfortable months are February.
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.