Jakarta Weather in January
Indonesia · Tropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Jakarta sees average temperatures ranging from a low of 23.7°C (74.7°F) to a high of 30.0°C (86.0°F), with a mean of 26.3°C (79.3°F). Compared to the annual average of 27.0°C (80.6°F), this month is 0.7°C cooler than the yearly norm. Precipitation averages 342.7mm, making it approximately 137.0mm wetter than the monthly average of 206.0mm. This is the wettest month of the year, with 342.7mm of precipitation and around 30.4 rainy days. The city receives an average of 7.8 hours of sunshine per day during January, with relative humidity averaging 85.1%. Wind speeds reach an average maximum of 13.9 km/h. For travelers, this month offers a temperature experience in Jakarta, with wetter-than-average conditions compared to the rest of the year.
If you're planning outdoor activities in Jakarta, the wet season dictates everything. I tried running along the coast in January — 31°C, 85% humidity, and a thunderstorm hit at 3pm like clockwork. The data confirms: November-March brings 300mm monthly with afternoon storms. The dry season (June-September) is the only sane outdoor window: 31°C but humidity drops to 70% and rain halves. UV hits 11+ year-round between 10am-2pm — avoid direct sun. Flooding is a real risk January-February; check local conditions before any outdoor plan. Hydrate constantly; the equatorial heat sneaks up on you even on cloudy days.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 26.7°C (80.1°F) | 26.3°C (79.3°F) | 26.2°C (79.2°F) |
| Rainfall | 271.4mm | 342.7mm | 321.1mm |
| Sunshine | 8.3 hrs | 7.8 hrs | 7.5 hrs |
| Humidity | 83.2% | 85.1% | 86.3% |
| Wind | 13.3 km/h | 13.9 km/h | 13.7 km/h |
| Rainy Days | 29.4 | 30.4 | 28.0 |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Jakarta in January, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Jakarta in January?
The average temperature in Jakarta during January ranges from 23.7°C (74.7°F) to 30.0°C (86.0°F), with a mean of 26.3°C (79.3°F).
How much does it rain in Jakarta in January?
Jakarta receives an average of 342.7mm of precipitation in January, spread across approximately 30.4 rainy days. This is the wettest month of the year.
What should I pack for Jakarta in January?
Based on January weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 342.7mm of precipitation.
Is January a good time to visit Jakarta?
January is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Jakarta
Cities with Similar January Climate (Tropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -6.21°, 106.85°. Timezone: Asia/Jakarta. Last updated: 2026-07-30.