Kafr el-Sheikh · Egypt · 31.24° N · 30.95° E
Solar position in Ar Riyāḑ
Sun position, daylight and the best solar panel angle for Ar Riyāḑ — computed for 31.24° N, 30.95° E, 7 m above sea level.
The sun right now
Sun in Ar Riyāḑ today
Saturday, 24 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:44 | sun 18° below horizon |
| Nautical dawn | 06:12 | 12° below |
| Civil dawn | 06:40 | 6° below |
| Sunrise | 07:05 | 103° ESE |
| Golden hour ends | 07:38 | sun 6° up |
| Solar noon | 12:40 | 47.0° high |
| Golden hour starts | 17:41 | sun 6° up |
| Sunset | 18:15 | 257° WSW |
| Civil dusk | 18:39 | 6° below |
| Nautical dusk | 19:08 | 12° below |
| Astronomical dusk | 19:36 | 18° below |
| Day length | 11 h 10 min | |
Sun path diagram for Ar Riyāḑ
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 82.2° at solar noon in Ar Riyāḑ; on the December solstice only 35.3°. Sunrise swings from 62° ENE in June to 117° ESE in December — a 55° 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 | 06:53 | 12:07 | 17:21 | 10 h 27 min | 38.9° |
| February | 06:31 | 12:09 | 17:48 | 11 h 16 min | 48.3° |
| March | 05:59 | 12:03 | 18:08 | 12 h 09 min | 59.1° |
| April | 05:21 | 11:55 | 18:28 | 13 h 07 min | 70.7° |
| May | 05:57 | 12:52 | 19:48 | 13 h 52 min | 79.0° |
| June | 05:52 | 12:58 | 20:03 | 14 h 11 min | 82.2° |
| July | 06:06 | 13:02 | 19:59 | 13 h 53 min | 79.2° |
| August | 06:25 | 12:59 | 19:32 | 13 h 07 min | 70.8° |
| September | 06:43 | 12:49 | 18:54 | 12 h 11 min | 59.4° |
| October | 07:03 | 12:40 | 18:18 | 11 h 15 min | 48.0° |
| November | 06:28 | 11:41 | 16:55 | 10 h 27 min | 38.8° |
| December | 06:50 | 11:54 | 16:57 | 10 h 07 min | 35.3° |
A year of daylight in Ar Riyāḑ
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 Ar Riyāḑ
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
25°collects the most energy over a year: 1750 kWh per kWp.
56°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1605 | 92% | 2.29 | 2.7× |
| 15° | 1725 | 99% | 2.95 | 2.1× |
| 25° year-round best | 1750 | 100% | 3.29 | 1.7× |
| 30° | 1745 | 100% | 3.43 | 1.6× |
| 31° = latitude | 1743 | 100% | 3.45 | 1.6× |
| 45° | 1665 | 95% | 3.70 | 1.4× |
| 56° off-grid best | 1546 | 88% | 3.75 | 1.3× |
| 60° | 1490 | 85% | 3.75 | 1.3× |
| 70° | 1328 | 76% | 3.65 | 1.5× |
| 90° | 930 | 53% | 3.17 | 2.6× |
A fixed array in Ar Riyāḑ produces the most over a year at 25°. The design month for an off-grid system is December: at 56° it makes 3.75 kWh per kWp a day, 14% more than at 25°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Ar Riyāḑ at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 25° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 25° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.14 | 4.46 | 3.81 | 3.54 | 14.6 °C |
| February | 3.95 | 4.56 | 3.89 | 4.06 | 15.0 °C |
| March | 5.31 | 4.91 | 4.16 | 4.99 | 16.7 °C |
| April | 6.43 | 4.43 | 3.72 | 5.43 | 19.1 °C |
| May | 7.28 | 3.83 | 3.16 | 5.63 | 22.5 °C |
| June | 7.83 | 3.42 | 2.78 | 5.71 | 25.5 °C |
| July | 7.70 | 3.56 | 2.87 | 5.66 | 27.4 °C |
| August | 7.04 | 4.22 | 3.41 | 5.54 | 27.9 °C |
| September | 6.06 | 5.01 | 4.08 | 5.29 | 26.5 °C |
| October | 4.68 | 5.11 | 4.21 | 4.57 | 23.9 °C |
| November | 3.49 | 4.75 | 3.97 | 3.78 | 20.4 °C |
| December | 2.87 | 4.30 | 3.65 | 3.29 | 16.7 °C |
| Year | 5.49 avg | 4.38 avg | 1328 kWh | 1750 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 430 Wp of panels at 70°, versus 360 Wp at 25°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Ar Riyāḑ
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.
3.7 mrow pitch at 70°
3.2 mrow pitch at 25°
How Ar Riyāḑ compares in Egypt
Against the other 235 places in Egypt with climate data, for a fixed array at its best angle.
205thof 236 places in Egypt for sunshine, shared: 5.49 peak sun hours a day on flat ground.
−7%solar energy a year compared with the average place in Egypt: 1,750 against 1,878 kWh per kWp.
+6 mindaylight on the longest day, compared with Cairo: 14 h 11 min against 14 h 05 min.
25°best year-round tilt here; across Egypt it runs from 20° in Hala'ib to 26° in Cairo.
Of the 236 places in Egypt, Aswān gets the most sun (6.52 peak sun hours a day) and ‘Izbat al Burj the least (5.35); Ar Riyāḑ ranks joint 205th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.78 kWh a day here, against 2.63 kWh on average in Egypt. The shortest day lasts 10 h 07 min, −6 min compared with Cairo.
Solar forecast for Ar Riyāḑ, 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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A free, live card for Ar Riyāḑ: 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.