Pekalongan weather in September
In September, Pekalongan sees average daytime highs of 28°C and overnight lows near 22°C, with 123 mm of rain across 14.8 wet days and about 12 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 22% of the time in September, and the air most often feels muggy.
Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Pekalongan's 3rd-clearest and 6th-windiest month. For the whole year in context, see Pekalongan's year-round climate.
- Daytime high
- 28°
- 4th warmest
- Overnight low
- 22°
- 3rd coldest
- Rainfall
- 123 mm
- 14.8 wet days
- Daylight
- 12 hours
- 5:37 AM – 5:35 PM
- Cloud cover
- 61%
- 3rd clearest
- Wind
- 4 km/h
- 6th windiest
- Solar energy
- 5.99 kWh/m²
- Travel score
- 5.4
- out of 10
Pekalongan is city in Central Java Province, Indonesia.
- Density
- 7,173/km²
- people per km²
- Founded
- 1906
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 28°C through the month.
A typical September day in Pekalongan reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 22 |
| 2 | 28 | 22 |
| 3 | 28 | 22 |
| 4 | 28 | 22 |
| 5 | 28 | 22 |
| 6 | 28 | 22 |
| 7 | 28 | 22 |
| 8 | 28 | 22 |
| 9 | 28 | 22 |
| 10 | 28 | 22 |
| 11 | 28 | 22 |
| 12 | 28 | 22 |
| 13 | 28 | 22 |
| 14 | 28 | 22 |
| 15 | 28 | 22 |
| 16 | 28 | 22 |
| 17 | 28 | 22 |
| 18 | 28 | 22 |
| 19 | 28 | 22 |
| 20 | 28 | 22 |
| 21 | 28 | 22 |
| 22 | 28 | 23 |
| 23 | 28 | 23 |
| 24 | 28 | 23 |
| 25 | 28 | 23 |
| 26 | 28 | 23 |
| 27 | 28 | 23 |
| 28 | 28 | 23 |
| 29 | 28 | 23 |
| 30 | 28 | 23 |
Pekalongan weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 23° | 411 | 30.4 | 12.4 | 3.3 |
| Feb | 27° / 23° | 380 | 27.6 | 12.2 | 3.2 |
| Mar | 28° / 23° | 414 | 30.2 | 12 | 3.2 |
| Apr | 28° / 23° | 377 | 28.4 | 11.9 | 3.2 |
| May | 28° / 23° | 202 | 23.3 | 11.7 | 4.0 |
| Jun | 28° / 23° | 148 | 17.2 | 11.6 | 5.1 |
| Jul | 27° / 22° | 103 | 14.4 | 11.6 | 5.8 |
| Aug | 28° / 22° | 76 | 11.8 | 11.8 | 6.1 |
| Sep | 28° / 22° | 123 | 14.8 | 12 | 5.4 |
| Oct | 28° / 23° | 293 | 22.7 | 12.2 | 4.1 |
| Nov | 28° / 23° | 465 | 28.3 | 12.3 | 3.3 |
| Dec | 28° / 23° | 517 | 29.6 | 12.4 | 3.3 |
Cloud cover in September
The sky is clear or mostly clear about 22% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 51 | 51 | 51 | 51 | 51 | 51 | 51 | 50 | 50 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 42 | 41 | 40 | 40 |
| Cloudier (%) | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 58 | 59 | 60 | 60 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 51 | 49 |
| 5 | 51 | 49 |
| 6 | 51 | 49 |
| 7 | 51 | 49 |
| 8 | 50 | 50 |
| 9 | 50 | 50 |
| 10 | 49 | 51 |
| 11 | 49 | 51 |
| 12 | 48 | 52 |
| 13 | 48 | 52 |
| 14 | 48 | 52 |
| 15 | 47 | 53 |
| 16 | 47 | 53 |
| 17 | 47 | 53 |
| 18 | 47 | 53 |
| 19 | 46 | 54 |
| 20 | 46 | 54 |
| 21 | 46 | 54 |
| 22 | 45 | 55 |
| 23 | 45 | 55 |
| 24 | 45 | 55 |
| 25 | 44 | 56 |
| 26 | 44 | 56 |
| 27 | 42 | 58 |
| 28 | 41 | 59 |
| 29 | 40 | 60 |
| 30 | 40 | 60 |
Chance of precipitation in September
Pekalongan gets around 123 mm of rain over 14.8 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 49% and peaks near 58% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 49 | 49 | 50 | 51 | 52 | 53 | 53 | 54 | 55 | 56 | 56 | 57 | 58 |
| Rain chance (%) | |
|---|---|
| 1 | 45 |
| 2 | 45 |
| 3 | 45 |
| 4 | 46 |
| 5 | 46 |
| 6 | 46 |
| 7 | 46 |
| 8 | 46 |
| 9 | 46 |
| 10 | 46 |
| 11 | 46 |
| 12 | 46 |
| 13 | 47 |
| 14 | 47 |
| 15 | 47 |
| 16 | 48 |
| 17 | 48 |
| 18 | 49 |
| 19 | 49 |
| 20 | 50 |
| 21 | 51 |
| 22 | 52 |
| 23 | 53 |
| 24 | 53 |
| 25 | 54 |
| 26 | 55 |
| 27 | 56 |
| 28 | 56 |
| 29 | 57 |
| 30 | 58 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 53 | 53 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 52 | 51 | 51 | 51 | 51 | 51 | 50 | 50 | 51 | 50 | 49 | 49 | 48 | 48 | 47 | 47 | 46 | 45 | 45 | 44 |
| Oppressive (%) | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 46 | 46 | 47 | 48 | 49 | 49 | 50 | 51 | 52 | 52 | 53 | 54 | 54 | 55 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 0 | 5 | 53 | 42 |
| 2 | 0 | 5 | 53 | 42 |
| 3 | 0 | 5 | 52 | 43 |
| 4 | 0 | 5 | 52 | 43 |
| 5 | 0 | 5 | 52 | 43 |
| 6 | 0 | 5 | 52 | 43 |
| 7 | 1 | 5 | 51 | 43 |
| 8 | 1 | 5 | 51 | 43 |
| 9 | 1 | 5 | 51 | 43 |
| 10 | 1 | 5 | 51 | 43 |
| 11 | 1 | 4 | 52 | 43 |
| 12 | 1 | 4 | 51 | 44 |
| 13 | 1 | 4 | 51 | 44 |
| 14 | 1 | 4 | 51 | 44 |
| 15 | 1 | 3 | 51 | 45 |
| 16 | 1 | 3 | 51 | 45 |
| 17 | 1 | 3 | 50 | 46 |
| 18 | 1 | 3 | 50 | 46 |
| 19 | 0 | 2 | 51 | 47 |
| 20 | 0 | 2 | 50 | 48 |
| 21 | 0 | 2 | 49 | 49 |
| 22 | 0 | 2 | 49 | 49 |
| 23 | 0 | 2 | 48 | 50 |
| 24 | 0 | 1 | 48 | 51 |
| 25 | 0 | 1 | 47 | 52 |
| 26 | 0 | 1 | 47 | 52 |
| 27 | 0 | 1 | 46 | 53 |
| 28 | 0 | 1 | 45 | 54 |
| 29 | 0 | 1 | 45 | 54 |
| 30 | 0 | 1 | 44 | 55 |
Wind in September
Winds average 4 km/h in September.
Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
Sunrise & sunset in September
Daylight runs from about 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over September. Sunrise moves from 5:45 AM to 5:29 AM, and sunset from 5:37 PM to 5:32 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 |
| Sunrise (AM) | 5:45 | 5:44 | 5:44 | 5:43 | 5:43 | 5:42 | 5:42 | 5:41 | 5:41 | 5:40 | 5:40 | 5:39 | 5:38 | 5:38 | 5:37 | 5:37 | 5:36 | 5:36 | 5:35 | 5:34 | 5:34 | 5:33 | 5:33 | 5:32 | 5:32 | 5:31 | 5:31 | 5:30 | 5:30 | 5:29 |
| Sunset (PM) | 5:37 | 5:37 | 5:37 | 5:37 | 5:36 | 5:36 | 5:36 | 5:36 | 5:36 | 5:36 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:34 | 5:34 | 5:34 | 5:34 | 5:34 | 5:33 | 5:33 | 5:33 | 5:33 | 5:33 | 5:33 | 5:32 | 5:32 | 5:32 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.9 | 5:45 | 5:37 |
| 2 | 11.9 | 5:44 | 5:37 |
| 3 | 11.9 | 5:44 | 5:37 |
| 4 | 11.9 | 5:43 | 5:37 |
| 5 | 11.9 | 5:43 | 5:36 |
| 6 | 11.9 | 5:42 | 5:36 |
| 7 | 11.9 | 5:42 | 5:36 |
| 8 | 11.9 | 5:41 | 5:36 |
| 9 | 11.9 | 5:41 | 5:36 |
| 10 | 11.9 | 5:40 | 5:36 |
| 11 | 11.9 | 5:40 | 5:35 |
| 12 | 11.9 | 5:39 | 5:35 |
| 13 | 11.9 | 5:38 | 5:35 |
| 14 | 11.9 | 5:38 | 5:35 |
| 15 | 12.0 | 5:37 | 5:35 |
| 16 | 12.0 | 5:37 | 5:35 |
| 17 | 12.0 | 5:36 | 5:34 |
| 18 | 12.0 | 5:36 | 5:34 |
| 19 | 12.0 | 5:35 | 5:34 |
| 20 | 12.0 | 5:34 | 5:34 |
| 21 | 12.0 | 5:34 | 5:34 |
| 22 | 12.0 | 5:33 | 5:33 |
| 23 | 12.0 | 5:33 | 5:33 |
| 24 | 12.0 | 5:32 | 5:33 |
| 25 | 12.0 | 5:32 | 5:33 |
| 26 | 12.0 | 5:31 | 5:33 |
| 27 | 12.0 | 5:31 | 5:33 |
| 28 | 12.0 | 5:30 | 5:32 |
| 29 | 12.0 | 5:30 | 5:32 |
| 30 | 12.1 | 5:29 | 5:32 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.99 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 5.99 kWh/m² in September across the year — September's 5.99 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.9 | Bright |
| 2 | 5.9 | Bright |
| 3 | 5.9 | Bright |
| 4 | 5.9 | Bright |
| 5 | 5.9 | Bright |
| 6 | 5.9 | Bright |
| 7 | 5.9 | Bright |
| 8 | 6.0 | Bright |
| 9 | 6.0 | Bright |
| 10 | 6.0 | Bright |
| 11 | 6.0 | Bright |
| 12 | 6.0 | Bright |
| 13 | 6.0 | Intense |
| 14 | 6.0 | Intense |
| 15 | 6.0 | Intense |
| 16 | 6.0 | Intense |
| 17 | 6.0 | Intense |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Intense |
| 20 | 6.0 | Intense |
| 21 | 6.0 | Bright |
| 22 | 6.0 | Bright |
| 23 | 6.0 | Bright |
| 24 | 6.0 | Bright |
| 25 | 6.0 | Bright |
| 26 | 6.0 | Bright |
| 27 | 6.0 | Bright |
| 28 | 6.0 | Bright |
| 29 | 6.0 | Bright |
| 30 | 6.0 | Bright |
Hazard calendar for Pekalongan
None of Pekalongan's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Pekalongan sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Pekalongan's rainy season runs October–April, when most of the year's rain falls.
Is September a good time to visit Pekalongan?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Pekalongan for sightseeing.
What to pack for Pekalongan in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Pekalongan sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.
Sea temperature near Pekalongan in September
The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in May at about 30°C and coldest in February near 29°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 30 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 30 | Tropical |
UV index in Pekalongan in September
Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Pekalongan peaks around March 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 13 | 14 | 11 | 8 | 7 | 9 | 11 | 12 | 11 | 6 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 11 | Extreme |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 6 | High |
| Dec | 12 | Extreme |
Air quality in Pekalongan in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Pekalongan is worst in May — around 42 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 33 | 31 | 37 | 38 | 42 | 38 | 35 | 35 | 36 | 37 | 34 | 33 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Moderate | Moderate | Poor | Poor | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 33 | Moderate |
| Feb | 31 | Moderate |
| Mar | 37 | Poor |
| Apr | 38 | Poor |
| May | 42 | Poor |
| Jun | 38 | Poor |
| Jul | 35 | Moderate |
| Aug | 35 | Moderate |
| Sep | 36 | Poor |
| Oct | 37 | Poor |
| Nov | 34 | Moderate |
| Dec | 33 | Moderate |
Where is Pekalongan?
Pekalongan sits at 6.9°S, 109.7°E, 10 m above sea level, in Indonesia. The nearest listed city is Wiradesa, 6.0 km away.
Topography around Pekalongan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Pekalongan.
Within 3 km, the terrain around Pekalongan has only modest variations in elevation — a maximum elevation change of 15 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.
The land around Pekalongan is covered by artificial surfaces (60%) within 3 km, water (42%) and trees (24%) within 16 km, and trees (47%) and water (35%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Pekalongan (-6.8886°, 109.6753°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).