Demak weather in September
In September, Demak sees average daytime highs of 34°C and overnight lows near 24°C, with 35 mm of rain across 5.1 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 31% 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 Demak's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Demak's year-round climate.
- Daytime high
- 34°
- 1st warmest
- Overnight low
- 24°
- 4th coldest
- Rainfall
- 35 mm
- 5.1 wet days
- Daylight
- 12 hours
- 5:33 AM – 5:31 PM
- Cloud cover
- 56%
- 3rd clearest
- Wind
- 7 km/h
- 2nd windiest
- Solar energy
- 6.45 kWh/m²
- Travel score
- 3.2
- out of 10
Demak is capital of Demak Regency, Central Java Province, Indonesia.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 34°C through the month.
A typical September day in Demak reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, September runs about 1°C warmer than 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) | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 34 | 24 |
| 2 | 34 | 24 |
| 3 | 34 | 24 |
| 4 | 34 | 24 |
| 5 | 34 | 24 |
| 6 | 34 | 24 |
| 7 | 34 | 24 |
| 8 | 34 | 24 |
| 9 | 34 | 24 |
| 10 | 34 | 24 |
| 11 | 34 | 24 |
| 12 | 34 | 24 |
| 13 | 34 | 24 |
| 14 | 34 | 24 |
| 15 | 34 | 24 |
| 16 | 34 | 24 |
| 17 | 34 | 24 |
| 18 | 34 | 24 |
| 19 | 34 | 24 |
| 20 | 34 | 24 |
| 21 | 34 | 24 |
| 22 | 34 | 24 |
| 23 | 34 | 24 |
| 24 | 34 | 24 |
| 25 | 34 | 24 |
| 26 | 34 | 24 |
| 27 | 34 | 24 |
| 28 | 34 | 24 |
| 29 | 34 | 24 |
| 30 | 34 | 24 |
How September really feels in Demak
Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Demak weather by month
How September compares with the rest of the year at a glance. September is the 1st-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 | 31° / 24° | 339 | 29.1 | 12.4 | 2.5 |
| Feb | 31° / 24° | 312 | 26.4 | 12.2 | 2.4 |
| Mar | 32° / 24° | 307 | 28.5 | 12 | 2.3 |
| Apr | 32° / 24° | 213 | 25.2 | 11.9 | 2.4 |
| May | 32° / 24° | 94 | 15.8 | 11.7 | 3.3 |
| Jun | 33° / 24° | 55 | 9.8 | 11.6 | 3.7 |
| Jul | 33° / 23° | 31 | 5.4 | 11.6 | 3.9 |
| Aug | 33° / 23° | 17 | 3.5 | 11.8 | 3.8 |
| Sep | 34° / 24° | 35 | 5.1 | 12 | 3.2 |
| Oct | 34° / 24° | 116 | 13.6 | 12.2 | 2.6 |
| Nov | 33° / 24° | 243 | 24.1 | 12.3 | 2.1 |
| Dec | 32° / 24° | 351 | 28.3 | 12.4 | 2.3 |
Cloud cover in September
The sky is clear or mostly clear about 31% 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 44%. 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 (%) | 63 | 63 | 64 | 63 | 63 | 63 | 62 | 62 | 61 | 61 | 59 | 59 | 59 | 58 | 57 | 56 | 56 | 56 | 54 | 54 | 53 | 52 | 51 | 51 | 50 | 48 | 48 | 47 | 46 | 45 |
| Cloudier (%) | 37 | 37 | 36 | 37 | 37 | 37 | 38 | 38 | 39 | 39 | 41 | 41 | 41 | 42 | 43 | 44 | 44 | 44 | 46 | 46 | 47 | 48 | 49 | 49 | 50 | 52 | 52 | 53 | 54 | 55 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 63 | 37 |
| 2 | 63 | 37 |
| 3 | 64 | 36 |
| 4 | 63 | 37 |
| 5 | 63 | 37 |
| 6 | 63 | 37 |
| 7 | 62 | 38 |
| 8 | 62 | 38 |
| 9 | 61 | 39 |
| 10 | 61 | 39 |
| 11 | 59 | 41 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 58 | 42 |
| 15 | 57 | 43 |
| 16 | 56 | 44 |
| 17 | 56 | 44 |
| 18 | 56 | 44 |
| 19 | 54 | 46 |
| 20 | 54 | 46 |
| 21 | 53 | 47 |
| 22 | 52 | 48 |
| 23 | 51 | 49 |
| 24 | 51 | 49 |
| 25 | 50 | 50 |
| 26 | 48 | 52 |
| 27 | 48 | 52 |
| 28 | 47 | 53 |
| 29 | 46 | 54 |
| 30 | 45 | 55 |
Chance of precipitation in September
Demak gets around 35 mm of rain over 5.1 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 18% and peaks near 28% 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 (%) | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 26 | 27 | 27 | 28 |
| Rain chance (%) | |
|---|---|
| 1 | 13 |
| 2 | 13 |
| 3 | 13 |
| 4 | 13 |
| 5 | 12 |
| 6 | 12 |
| 7 | 12 |
| 8 | 12 |
| 9 | 12 |
| 10 | 13 |
| 11 | 13 |
| 12 | 13 |
| 13 | 14 |
| 14 | 14 |
| 15 | 15 |
| 16 | 16 |
| 17 | 17 |
| 18 | 18 |
| 19 | 19 |
| 20 | 20 |
| 21 | 21 |
| 22 | 22 |
| 23 | 22 |
| 24 | 23 |
| 25 | 24 |
| 26 | 25 |
| 27 | 26 |
| 28 | 27 |
| 29 | 27 |
| 30 | 28 |
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 56% of days. Sticky, muggy-or-worse air turns up on roughly 94% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 |
| Muggy (%) | 57 | 57 | 57 | 57 | 56 | 56 | 57 | 58 | 58 | 59 | 58 | 58 | 60 | 60 | 59 | 59 | 58 | 58 | 58 | 58 | 57 | 57 | 56 | 55 | 55 | 54 | 53 | 51 | 51 | 50 |
| Oppressive (%) | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 32 | 32 | 33 | 34 | 34 | 35 | 36 | 37 | 38 | 39 |
| Miserable (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 8 | 57 | 33 | 2 |
| 2 | 8 | 57 | 33 | 2 |
| 3 | 8 | 57 | 33 | 2 |
| 4 | 8 | 57 | 33 | 2 |
| 5 | 9 | 56 | 33 | 2 |
| 6 | 9 | 56 | 33 | 2 |
| 7 | 9 | 57 | 32 | 2 |
| 8 | 8 | 58 | 32 | 2 |
| 9 | 8 | 58 | 32 | 2 |
| 10 | 8 | 59 | 31 | 2 |
| 11 | 8 | 58 | 31 | 3 |
| 12 | 8 | 58 | 31 | 3 |
| 13 | 7 | 60 | 30 | 3 |
| 14 | 7 | 60 | 30 | 3 |
| 15 | 7 | 59 | 30 | 4 |
| 16 | 7 | 59 | 30 | 4 |
| 17 | 6 | 58 | 31 | 5 |
| 18 | 6 | 58 | 31 | 5 |
| 19 | 5 | 58 | 31 | 6 |
| 20 | 5 | 58 | 31 | 6 |
| 21 | 4 | 57 | 32 | 7 |
| 22 | 4 | 57 | 32 | 7 |
| 23 | 4 | 56 | 33 | 7 |
| 24 | 3 | 55 | 34 | 8 |
| 25 | 3 | 55 | 34 | 8 |
| 26 | 3 | 54 | 35 | 8 |
| 27 | 3 | 53 | 36 | 8 |
| 28 | 3 | 51 | 37 | 9 |
| 29 | 2 | 51 | 38 | 9 |
| 30 | 2 | 50 | 39 | 9 |
Wind in September
Winds average 7 km/h in September.
Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| 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 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | 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 5:41 AM to 5:25 AM, and sunset from 5:33 PM to 5:28 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) | 5:41 | 5:41 | 5:40 | 5:40 | 5:39 | 5:38 | 5:38 | 5:37 | 5:37 | 5:36 | 5:36 | 5:35 | 5:35 | 5:34 | 5:33 | 5:33 | 5:32 | 5:32 | 5:31 | 5:31 | 5:30 | 5:29 | 5:29 | 5:28 | 5:28 | 5:27 | 5:27 | 5:26 | 5:26 | 5:25 |
| Sunset (PM) | 5:33 | 5:33 | 5:33 | 5:33 | 5:33 | 5:32 | 5:32 | 5:32 | 5:32 | 5:32 | 5:32 | 5:31 | 5:31 | 5:31 | 5:31 | 5:31 | 5:30 | 5:30 | 5:30 | 5:30 | 5:30 | 5:30 | 5:29 | 5:29 | 5:29 | 5:29 | 5:29 | 5:29 | 5:28 | 5:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.9 | 5:41 | 5:33 |
| 2 | 11.9 | 5:41 | 5:33 |
| 3 | 11.9 | 5:40 | 5:33 |
| 4 | 11.9 | 5:40 | 5:33 |
| 5 | 11.9 | 5:39 | 5:33 |
| 6 | 11.9 | 5:38 | 5:32 |
| 7 | 11.9 | 5:38 | 5:32 |
| 8 | 11.9 | 5:37 | 5:32 |
| 9 | 11.9 | 5:37 | 5:32 |
| 10 | 11.9 | 5:36 | 5:32 |
| 11 | 11.9 | 5:36 | 5:32 |
| 12 | 11.9 | 5:35 | 5:31 |
| 13 | 11.9 | 5:35 | 5:31 |
| 14 | 11.9 | 5:34 | 5:31 |
| 15 | 12.0 | 5:33 | 5:31 |
| 16 | 12.0 | 5:33 | 5:31 |
| 17 | 12.0 | 5:32 | 5:30 |
| 18 | 12.0 | 5:32 | 5:30 |
| 19 | 12.0 | 5:31 | 5:30 |
| 20 | 12.0 | 5:31 | 5:30 |
| 21 | 12.0 | 5:30 | 5:30 |
| 22 | 12.0 | 5:29 | 5:30 |
| 23 | 12.0 | 5:29 | 5:29 |
| 24 | 12.0 | 5:28 | 5:29 |
| 25 | 12.0 | 5:28 | 5:29 |
| 26 | 12.0 | 5:27 | 5:29 |
| 27 | 12.0 | 5:27 | 5:29 |
| 28 | 12.0 | 5:26 | 5:29 |
| 29 | 12.0 | 5:26 | 5:28 |
| 30 | 12.1 | 5:25 | 5:28 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.45 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.79 kWh/m² to a high of 6.45 kWh/m² in September across the year — September's 6.45 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) | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.4 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.5 | Intense |
Hazard calendar for Demak
None of Demak's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Demak sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Demak's monsoon runs November–April, when most of the year's rain falls.
Is September a good time to visit Demak?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a weaker month for outdoor sightseeing in Demak. The water and warmth also suit a beach or pool day.
What to pack for Demak in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Demak sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. About 5 days see rain.
Sea temperature near Demak 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 at the nearest coast (about 29 km away) 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 | 29 | 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 | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 30 | Tropical |
UV index in Demak 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 Demak peaks around March 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 16 at about 7 (very 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) | 10 | 12 | 14 | 11 | 8 | 8 | 9 | 11 | 12 | 11 | 7 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 11 | Extreme |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 7 | High |
| Dec | 12 | Extreme |
Air quality in Demak 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 Demak is worst in May — around 45 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) | 31 | 29 | 35 | 39 | 45 | 42 | 38 | 35 | 37 | 39 | 37 | 34 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 31 | Moderate |
| Feb | 29 | Moderate |
| Mar | 35 | Poor |
| Apr | 39 | Poor |
| May | 45 | Poor |
| Jun | 42 | Poor |
| Jul | 38 | Poor |
| Aug | 35 | Poor |
| Sep | 37 | Poor |
| Oct | 39 | Poor |
| Nov | 37 | Poor |
| Dec | 34 | Moderate |
Where is Demak?
Demak sits at 6.9°S, 110.6°E, 9 m above sea level, in Indonesia. The nearest listed city is Welahan, 13 km away.
Topography around Demak
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Demak.
Within 3 km, the terrain around Demak has only modest variations in elevation — a maximum elevation change of 10 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 20 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,105 m.
The land around Demak is covered by cropland (58%) and artificial surfaces (22%) within 3 km, cropland (63%) within 16 km, and trees (39%), water (31%) and cropland (21%) 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 Demak (-6.8909°, 110.6396°, elevation 9 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).