Pematangsiantar in september: average Weather, Temperature and Climate
Weather in Pematangsiantar in september 2025
The weather in Pematangsiantar in september comes from statistical datas on the last years. You can view the weather statistics the entire month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
72°F
Partly Cloudy
38% of time
28%
19%
8%
Weather at 12pm
86°F
Partly Cloudy
42% of time
27%
17%
10%
Weather at 6pm
76°F
Heavy rain
46% of time
30%
12%
7%
Weather at 3am
70°F
27%
26%
20%
17%
Evolution of daily average temperature and precipitation in Pematangsiantar in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Pematangsiantar in september.
The climate of Pematangsiantar in september is tolerable
The weather in september in Pematangsiantar is wet (with 14.3in of precipitation over 20 days). It should be noted a worsening from the previous month since in august there is an average of 13in of rainfall over 21 days.
The climate good here september. Temperatures are up to 86°F. On average, the recorded minimum temperature is 72°F. Thus, the mean temperature average in september in Pematangsiantar is 79°F. These temperatures are far removed from those records observed in Pematangsiantar in september with a maximum record of 95°F in 2017 and a minimum record of 65°F in 2009. You can plan to have about 15 days with temperatures up to 86°F, or 50 of time.
On average, in Pematangsiantar, the days of september last 12:08. Sunrise is at 06:15 and sets at 18:23.
September: another location on the island of Sumatra?
If you want to go to Sumatra in september, there are destinations with better weather than Pematangsiantar:
In september, Palembang, Banda Aceh, Bandar Lampung, Jambi City, Batam and Pulau Bangka have good weather.
Seasonal average climate and temperature of Pematangsiantar in september
Check below seasonal norms These statistics are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 79°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 72°F | ||||
| Highest record temperature | 95°F (2017) | ||||
| Lowest record temperature | 65°F (2009) | ||||
| Number of days at +86°F | 15 day(s) (50%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 7km/h | ||||
| Wind temperature | 72°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 14.3in | ||||
| Number of days with rainfall | 20 day(s) (65%) | ||||
| Record daily rainfall | 3.9in (2009) | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 8.2km | ||||
| Cloud cover | 41% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:15 | ||||
| Time of sunset | 18:23 | ||||
| Length of day | 12:08 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Pematangsiantar in september 2024:
68°F to 88°F
68°F to 83°F
67°F to 86°F
67°F to 88°F
68°F to 88°F
70°F to 85°F
70°F to 85°F
70°F to 79°F
68°F to 77°F
67°F to 85°F
68°F to 83°F
68°F to 85°F
68°F to 81°F
67°F to 85°F
68°F to 85°F
68°F to 86°F
70°F to 86°F
70°F to 83°F
70°F to 86°F
68°F to 86°F
68°F to 76°F
72°F to 88°F
68°F to 83°F
70°F to 77°F
68°F to 85°F
68°F to 83°F
68°F to 81°F
68°F to 81°F
68°F to 81°F
68°F to 79°F
Map: other cities on the island of Sumatra in september
Cities near Pematangsiantar:
| Parapat in september | tolerable weather |
| Tebingtinggi in september | tolerable weather |
| Samosir in september | tolerable weather |
| Lake Toba (Danau Toba) in september | very bad weather |
| Kisaran in september | tolerable weather |
| Berastagi in september | very bad weather |
| Medan in september | tolerable weather |
| Bukit Lawang in september | tolerable weather |
| Sibolga in september | tolerable weather |
| Padangsidempuan in september | tolerable weather |
| Langsa in september | tolerable weather |
| Tapaktuan in september | very bad weather |
Click over cities on the map for information about the weather in september.
Pematangsiantar
perfect weather
good
tolerable
bad
very bad
Weather data for Pematangsiantar in september:
Weather data for Pematangsiantar for september are derived from an average of the weather forecast since 2009 in Pematangsiantar. There is a margin of error and these forecasts are to be considered as general information only. The weather in Pematangsiantar can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Pematangsiantar.