White Nile · Sudan · 13.16° N · 32.66° E
Solar position in Kosti
Sun position, daylight and the best solar panel angle for Kosti — computed for 13.16° N, 32.66° E, 387 m above sea level.
The sun right now
Sun in Kosti today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:29 | sun 18° below horizon |
| Nautical dawn | 04:54 | 12° below |
| Civil dawn | 05:19 | 6° below |
| Sunrise | 05:41 | 102° ESE |
| Golden hour ends | 06:10 | sun 6° up |
| Solar noon | 11:33 | 65.0° high |
| Golden hour starts | 16:56 | sun 6° up |
| Sunset | 17:25 | 258° WSW |
| Civil dusk | 17:47 | 6° below |
| Nautical dusk | 18:12 | 12° below |
| Astronomical dusk | 18:37 | 18° below |
| Day length | 11 h 44 min | |
Sun path diagram for Kosti
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 79.7° at solar noon in Kosti; on the December solstice only 53.4°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 48° 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 | 06:16 | 12:00 | 17:44 | 11 h 29 min | 57.0° |
| February | 06:09 | 12:03 | 17:56 | 11 h 47 min | 66.4° |
| March | 05:52 | 11:56 | 18:00 | 12 h 07 min | 77.2° |
| April | 05:33 | 11:48 | 18:02 | 12 h 30 min | 88.8° |
| May | 05:22 | 11:45 | 18:09 | 12 h 47 min | 82.9° |
| June | 05:24 | 11:51 | 18:18 | 12 h 54 min | 79.7° |
| July | 05:32 | 11:55 | 18:19 | 12 h 47 min | 82.7° |
| August | 05:37 | 11:52 | 18:07 | 12 h 30 min | 88.9° |
| September | 05:38 | 11:42 | 17:46 | 12 h 08 min | 77.5° |
| October | 05:40 | 11:33 | 17:27 | 11 h 46 min | 66.1° |
| November | 05:50 | 11:35 | 17:19 | 11 h 28 min | 56.9° |
| December | 06:06 | 11:47 | 17:27 | 11 h 21 min | 53.4° |
A year of daylight in Kosti
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 Kosti
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
16°collects the most energy over a year: 1839 kWh per kWp.
0°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 | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° off-grid best | 1779 | 97% | 4.47 | 1.3× |
| 13° = latitude | 1837 | 100% | 4.20 | 1.3× |
| 15° | 1839 | 100% | 4.14 | 1.4× |
| 16° year-round best | 1839 | 100% | 4.11 | 1.4× |
| 30° | 1792 | 97% | 3.60 | 1.7× |
| 45° | 1642 | 89% | 2.87 | 2.1× |
| 60° | 1402 | 76% | 2.03 | 2.9× |
| 70° | 1203 | 65% | 1.48 | 3.9× |
| 90° | 816 | 44% | 1.09 | 4.0× |
A fixed array in Kosti produces the most over a year at 16°. The design month for an off-grid system is July: at 0° it makes 4.47 kWh per kWp a day, 9% more than at 16°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Kosti at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 16° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 16° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.96 | 6.53 | 5.35 | 5.55 | 24.9 °C |
| February | 6.54 | 5.69 | 4.62 | 5.68 | 27.5 °C |
| March | 7.01 | 4.54 | 3.64 | 5.65 | 30.1 °C |
| April | 7.18 | 3.15 | 2.49 | 5.38 | 32.8 °C |
| May | 6.79 | 2.17 | 1.68 | 4.84 | 33.5 °C |
| June | 6.28 | 1.83 | 1.41 | 4.43 | 32.1 °C |
| July | 5.69 | 1.89 | 1.48 | 4.11 | 29.3 °C |
| August | 5.48 | 2.35 | 1.87 | 4.14 | 27.7 °C |
| September | 5.96 | 3.41 | 2.74 | 4.71 | 28.8 °C |
| October | 6.16 | 4.78 | 3.84 | 5.15 | 30.6 °C |
| November | 6.03 | 6.21 | 5.02 | 5.45 | 28.5 °C |
| December | 5.74 | 6.71 | 5.48 | 5.43 | 25.7 °C |
| Year | 6.23 avg | 4.10 avg | 1203 kWh | 1839 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 830 Wp of panels at 70°, versus 290 Wp at 16°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Kosti
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.
2.2 mrow pitch at 70°
2.4 mrow pitch at 16°
How Kosti compares in Sudan
Against the other 74 places in Sudan with climate data, for a fixed array at its best angle.
55thof 75 places in Sudan for sunshine, shared: 6.23 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Sudan: 1,839 against 1,880 kWh per kWp.
−9 mindaylight on the longest day, compared with Khartoum: 12 h 54 min against 13 h 03 min.
16°best year-round tilt here; across Sudan it runs from 12° in Abyei to 19° in Atbara.
Of the 75 places in Sudan, Mellit gets the most sun (6.72 peak sun hours a day) and Port Sudan the least (5.78); Kosti ranks joint 55th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.42 kWh a day here, against 1.52 kWh on average in Sudan. The shortest day lasts 11 h 21 min, +9 min compared with Khartoum.
Solar forecast for Kosti, 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 Kosti
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Places near Kosti
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A free, live card for Kosti: 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.