Weather in Medan in April
Indonesia · 20-year averages, April
A hard month. April is a hard month in Medan, and worth planning around. You should expect rain on 22 days of the month, which is more days wet than dry.
Medan barely has seasons. April scores 45 out of 100 against a best of 54 in February — a gap small enough that the month you choose matters far less here than the week you choose.
Rain on 22 of the month's 30 days, 4 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 85% nothing dries, including you.
What the averages hide
Averages flatten a month, and this one hides a few things: 21 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 5.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest April day reached 33.4 °C and the coldest night fell to 22.6 °C, and the wettest single day dropped 45 mm — roughly 33% of the month's rain in one day.
April is moderately variable: 44 mm in the driest year against 270 mm in the wettest, around an average of 138 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.
Wind is light at 4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 85% is the real story though — it is the number that decides how the day feels, not the 30.5 °C.
How April sits in the year
Temperatures hold steady either side: 30.2 °C in March, 30.5 here, 30.7 in May. Nothing about the timing within the month matters much.
Daylight in April
Medan sits close enough to the equator that daylight barely moves all year — 12.2 hours in April, against a range of just 0.4 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.
Sea temperature
The sea sits at about 30 °C in April — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.
How busy it gets
Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
April in Medan versus nearby
If Medan is one option among several, the nearby comparison is worth making. Ipoh is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Kota Kuala Muda is close enough to be a coin toss — within a degree on temperature, 2 days more rain.
So: April works, with February the better month by 9 points if the dates can move. If they cannot, nothing here should stop you booking.
Every month in Medan
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|
| January | 29 | 23.6 | 22 | 150 | 88 | 11.9 | 28.8 | 49 |
| February | 29.7 | 23.7 | 16 | 90 | 86 | 12 | 29.2 | 54 |
| March | 30.2 | 24.2 | 21 | 142 | 85 | 12.1 | 29.7 | 46 |
| April | 30.5 | 24.7 | 22 | 138 | 85 | 12.2 | 30 | 45 |
| May | 30.7 | 25 | 25 | 200 | 84 | 12.3 | 30.4 | 45 |
| June | 30.4 | 24.4 | 20 | 137 | 83 | 12.3 | 30.4 | 47 |
| July | 30.2 | 24.1 | 22 | 168 | 83 | 12.3 | 30.2 | 48 |
| August | 30.2 | 24.1 | 25 | 199 | 84 | 12.2 | 30 | 47 |
| September | 29.9 | 24.2 | 27 | 261 | 85 | 12.1 | 29.7 | 47 |
| October | 29.5 | 24.2 | 28 | 310 | 87 | 12 | 29.6 | 47 |
| November | 29 | 24.1 | 28 | 233 | 88 | 12 | 29.4 | 49 |
| December | 28.8 | 23.9 | 27 | 250 | 89 | 11.9 | 29 | 49 |
See all twelve months in Medan, or where else to go in April.
Planning the rest of the trip
- Flight time to Medan how long you are actually in the air
- Medan time zone and the difference from home
- Days until your trip count down to the departure date