Sylhet Division · Bangladesh · 25.07° N · 91.40° E
Solar position in Sunāmganj
Sun position, daylight and the best solar panel angle for Sunāmganj — computed for 25.07° N, 91.40° E, 14 m above sea level.
The sun right now
Sun in Sunāmganj today
Sunday, 25 October 2026 · local time UTC+6
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:40 | sun 18° below horizon |
| Nautical dawn | 05:07 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 05:57 | 103° ESE |
| Golden hour ends | 06:28 | sun 6° up |
| Solar noon | 11:38 | 52.8° high |
| Golden hour starts | 16:47 | sun 6° up |
| Sunset | 17:19 | 257° WSW |
| Civil dusk | 17:42 | 6° below |
| Nautical dusk | 18:09 | 12° below |
| Astronomical dusk | 18:35 | 18° below |
| Day length | 11 h 21 min | |
Sun path diagram for Sunāmganj
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 88.4° at solar noon in Sunāmganj; on the December solstice only 41.5°. Sunrise swings from 64° ENE in June to 116° ESE in December — a 52° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:40 | 12:05 | 17:30 | 10 h 50 min | 45.1° |
| February | 06:24 | 12:08 | 17:51 | 11 h 27 min | 54.4° |
| March | 05:57 | 12:01 | 18:05 | 12 h 08 min | 65.2° |
| April | 05:27 | 11:53 | 18:19 | 12 h 53 min | 76.8° |
| May | 05:07 | 11:50 | 18:34 | 13 h 27 min | 85.1° |
| June | 05:05 | 11:56 | 18:47 | 13 h 42 min | 88.4° |
| July | 05:16 | 12:00 | 18:44 | 13 h 28 min | 85.4° |
| August | 05:30 | 11:57 | 18:24 | 12 h 53 min | 77.0° |
| September | 05:42 | 11:47 | 17:52 | 12 h 10 min | 65.6° |
| October | 05:55 | 11:38 | 17:22 | 11 h 27 min | 54.2° |
| November | 06:15 | 11:40 | 17:05 | 10 h 50 min | 45.0° |
| December | 06:34 | 11:52 | 17:09 | 10 h 35 min | 41.5° |
A year of daylight in Sunāmganj
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Sunāmganj
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
28°collects the most energy over a year: 1428 kWh per kWp.
4°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1291 | 90% | 3.27 | 1.4× |
| 4° off-grid best | 1327 | 93% | 3.26 | 1.3× |
| 15° | 1398 | 98% | 3.18 | 1.4× |
| 25° = latitude | 1426 | 100% | 3.03 | 1.5× |
| 28° year-round best | 1428 | 100% | 2.97 | 1.6× |
| 30° | 1427 | 100% | 2.93 | 1.6× |
| 45° | 1379 | 97% | 2.56 | 1.9× |
| 60° | 1256 | 88% | 2.07 | 2.3× |
| 70° | 1137 | 80% | 1.72 | 2.7× |
| 90° | 836 | 59% | 1.11 | 3.5× |
A fixed array in Sunāmganj produces the most over a year at 28°. The design month for an off-grid system is June: at 4° it makes 3.26 kWh per kWp a day, 10% more than at 28°, and costs 7% of the yearly total. Why steep panels win winter.
Off-grid solar in Sunāmganj at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 28° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 28° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.85 | 5.03 | 4.31 | 4.30 | 14.2 °C |
| February | 4.61 | 4.89 | 4.14 | 4.62 | 17.1 °C |
| March | 5.22 | 4.27 | 3.56 | 4.61 | 21.1 °C |
| April | 5.25 | 3.31 | 2.71 | 4.14 | 23.9 °C |
| May | 4.93 | 2.62 | 2.11 | 3.64 | 24.9 °C |
| June | 4.13 | 2.15 | 1.72 | 2.97 | 25.4 °C |
| July | 4.12 | 2.23 | 1.78 | 3.00 | 25.4 °C |
| August | 4.36 | 2.63 | 2.13 | 3.31 | 25.4 °C |
| September | 4.13 | 3.00 | 2.44 | 3.37 | 24.7 °C |
| October | 4.32 | 4.09 | 3.39 | 4.02 | 22.7 °C |
| November | 4.27 | 5.46 | 4.59 | 4.65 | 18.9 °C |
| December | 3.75 | 5.36 | 4.57 | 4.37 | 15.5 °C |
| Year | 4.41 avg | 3.75 avg | 1137 kWh | 1428 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 690 Wp of panels at 70°, versus 400 Wp at 28°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Sunāmganj
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
3.1 mrow pitch at 70°
3.0 mrow pitch at 28°
How Sunāmganj compares in Bangladesh
Against the other 132 places in Bangladesh with climate data, for a fixed array at its best angle.
127thof 133 places in Bangladesh for sunshine: 4.41 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Bangladesh: 1,428 against 1,428 kWh per kWp.
+6 mindaylight on the longest day, compared with Dhaka: 13 h 42 min against 13 h 36 min.
28°best year-round tilt here; across Bangladesh it runs from 23° in Taluker Char Doani to 28° in Sylhet.
Of the 133 places in Bangladesh, Hāthazāri and one other place get the most sun (4.91 peak sun hours a day) and Panchagarh the least (4.36); Sunāmganj ranks 127th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.72 kWh a day here, against 1.76 kWh on average in Bangladesh. The shortest day lasts 10 h 35 min, −6 min compared with Dhaka.
Solar forecast for Sunāmganj, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Sunāmganj
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Places near Sunāmganj
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A free, live card for Sunāmganj: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.