Monthly Climate
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Best time to visit Pematangsiantar

January is the best time to visit Pematangsiantar for general sightseeing, with average highs of 27 °C and about 27 wet days.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking January comfort 61/100
The least cloud February 81 % average cloud cover
The least rain February 189 mm
Warmth June 28 °C
Cooler weather December 26 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 January 61 27 °C 27
2 December 61 26 °C 29
3 February 60 27 °C 24
4 November 59 27 °C 29
5 October 58 27 °C 30
6 March 57 28 °C 27
7 September 57 28 °C 29
8 August 56 28 °C 28
9 July 56 28 °C 26
10 April 56 28 °C 29
11 June 55 28 °C 26
12 May 54 28 °C 29

When to think twice

May scores lowest with about 29 wet days and highs near 28 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 26.6 °C 241 mm 85 %
February 27.2 °C 189 mm 81 %
March 27.8 °C 226 mm 83 %
April 27.9 °C 256 mm 89 %
May 28.2 °C 260 mm 90 %
June 28.3 °C 223 mm 84 %
July 28.1 °C 234 mm 84 %
August 28.0 °C 271 mm 88 %
September 27.6 °C 356 mm 91 %
October 27.1 °C 367 mm 93 %
November 26.6 °C 355 mm 94 %
December 26.3 °C 314 mm 92 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.