Surabaya Climate by Month
Surabaya, East Java, Indonesia
Hot all year, with a rainy season from December to April.
The climate in Surabaya is hot all year, with a rainy season from December to April. October is the warmest month, with highs around 94°F (34°C); July is the coolest at 91°F (33°C), and nights dip to 72°F (22°C). It gets 65 in (1661 mm) of rain a year, 77% of it from December to April.
- Warmest month
- 94°F(34°C)
- Average high, October
- Coldest nights
- 72°F(22°C)
- Average low, August
- Rain per year
- 65 in(1661 mm)
- Wettest: February
- Humidity
- 72%
- Sunniest: September
Best and worst months in Surabaya
Best for weatherThe most comfortable weather comes from July to September, with highs around 92°F (33°C) and about 0.6 in (16 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the wettest, with 12 in (296 mm) of rain.
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in August.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Surabaya weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 92°F(33°C) | 75°F(24°C) | 12 in(296 mm) | 78% | 4.6 |
| FebFebruary | 91°F(33°C) | 74°F(24°C) | 12 in(300 mm) | 78% | 4.7 |
| MarMarch | 92°F(33°C) | 75°F(24°C) | 10 in(258 mm) | 77% | 4.8 |
| AprApril | 92°F(33°C) | 76°F(24°C) | 7.3 in(186 mm) | 75% | 5.0 |
| MayMay | 92°F(34°C) | 76°F(24°C) | 4.2 in(107 mm) | 73% | 4.7 |
| JunJune | 92°F(33°C) | 74°F(23°C) | 2.5 in(64 mm) | 73% | 4.7 |
| JulJulyBest | 91°F(33°C) | 73°F(23°C) | 0.8 in(21 mm) | 70% | 4.9 |
| AugAugustBest | 92°F(33°C) | 72°F(22°C) | 0.4 in(9 mm) | 67% | 5.5 |
| SepSeptemberBest | 93°F(34°C) | 74°F(23°C) | 0.7 in(18 mm) | 64% | 6.0 |
| OctOctober | 94°F(34°C) | 76°F(24°C) | 1.7 in(44 mm) | 66% | 6.0 |
| NovNovember | 94°F(34°C) | 76°F(25°C) | 4.6 in(118 mm) | 71% | 5.3 |
| DecDecember | 92°F(33°C) | 76°F(24°C) | 9.4 in(240 mm) | 76% | 4.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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