East Java weather in January
January is one of the least pleasant months in East Java: highs of 29°C (84°F) and about 337 mm (13.3 in) of rain on average. Nights average 26°C (78°F) and cloud cover 90% (NASA POWER, 2001–2025 averages). The sea averages 31°C (88°F). It is the wettest month of the year and the 2nd coolest. Compared with December, it is cooler and about as wet; February brings highs of 29°C (83°F) and 316 mm (12.4 in) of rain.
Figures are long-term averages for Surabaya, the largest city in East Java. See below for other places.
Is January a good time to visit East Java?
least pleasant month Weather score 32/100.
January is one of the least pleasant months for weather in East Java. For better conditions, consider Jun–Sep.
Does it rain a lot in East Java in January?
Yes, it is one of the rainy months: about 337 mm (13.3 in) falls in an average January. It is the wettest month of the year.
How warm is East Java in January?
Days average 29°C (84°F) and nights 26°C (78°F).
East Java weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 29°C (84°F) | 26°C (78°F) | 337 mm | 90% | 31°C (88°F) | least pleasant |
| February | 29°C (83°F) | 25°C (78°F) | 316 mm | 88% | 32°C (89°F) | least pleasant |
| March | 29°C (84°F) | 26°C (78°F) | 272 mm | 84% | 32°C (89°F) | least pleasant |
| April | 30°C (85°F) | 26°C (79°F) | 193 mm | 76% | 32°C (90°F) | fair |
| May | 30°C (86°F) | 26°C (79°F) | 123 mm | 61% | 31°C (88°F) | fair |
| June | 30°C (87°F) | 25°C (77°F) | 74 mm | 52% | 31°C (87°F) | best |
| July | 31°C (88°F) | 24°C (76°F) | 35 mm | 45% | 30°C (85°F) | best |
| August | 32°C (90°F) | 24°C (76°F) | 11 mm | 39% | 30°C (86°F) | best |
| September | 33°C (92°F) | 25°C (78°F) | 18 mm | 40% | 31°C (87°F) | best |
| October | 33°C (92°F) | 26°C (80°F) | 63 mm | 58% | 32°C (89°F) | fair |
| November | 32°C (89°F) | 27°C (80°F) | 140 mm | 78% | 32°C (90°F) | fair |
| December | 30°C (85°F) | 26°C (78°F) | 300 mm | 91% | 32°C (89°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across East Java in January
Weather can differ a lot within East Java: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Surabaya | 29°C (84°F) | 26°C (78°F) | 337 mm | least pleasant |
| Malang | 27°C (80°F) | 22°C (71°F) | 321 mm | least pleasant |
| Situbondo | 29°C (84°F) | 26°C (80°F) | 295 mm | least pleasant |
| Kediri | 28°C (82°F) | 23°C (73°F) | 332 mm | least pleasant |
| Jember | 27°C (80°F) | 21°C (70°F) | 295 mm | least pleasant |
| Probolinggo | 28°C (82°F) | 23°C (73°F) | 308 mm | least pleasant |
| Batu | 27°C (80°F) | 22°C (71°F) | 321 mm | least pleasant |
| Pasuruan | 29°C (84°F) | 26°C (78°F) | 315 mm | least pleasant |
| Madiun | 29°C (83°F) | 22°C (72°F) | 338 mm | least pleasant |
| Singosari | 27°C (80°F) | 22°C (71°F) | 321 mm | least pleasant |
| Blitar | 28°C (82°F) | 23°C (73°F) | 332 mm | least pleasant |
| Mojokerto | 28°C (83°F) | 23°C (73°F) | 326 mm | least pleasant |