South Khorasan Province · Iran · 32.87° N · 59.22° E
Solar position in Bīrjand
Sun position, daylight and the best solar panel angle for Bīrjand — computed for 32.87° N, 59.22° E, 1459 m above sea level.
The sun right now
Sun in Bīrjand today
Saturday, 24 October 2026 · local time UTC+3:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:21 | sun 18° below horizon |
| Nautical dawn | 04:50 | 12° below |
| Civil dawn | 05:18 | 6° below |
| Sunrise | 05:44 | 103° ESE |
| Golden hour ends | 06:17 | sun 6° up |
| Solar noon | 11:17 | 45.4° high |
| Golden hour starts | 16:16 | sun 6° up |
| Sunset | 16:50 | 256° WSW |
| Civil dusk | 17:15 | 6° below |
| Nautical dusk | 17:44 | 12° below |
| Astronomical dusk | 18:12 | 18° below |
| Day length | 11 h 06 min | |
Sun path diagram for Bīrjand
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 80.6° at solar noon in Bīrjand; on the December solstice only 33.7°. Sunrise swings from 61° ENE in June to 118° ESE in December — a 57° 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 | 06:34 | 11:44 | 16:54 | 10 h 21 min | 37.3° |
| February | 06:10 | 11:46 | 17:23 | 11 h 13 min | 46.6° |
| March | 05:35 | 11:40 | 17:45 | 12 h 09 min | 57.4° |
| April | 04:56 | 11:31 | 18:07 | 13 h 11 min | 69.0° |
| May | 04:30 | 11:29 | 18:29 | 13 h 59 min | 77.3° |
| June | 04:25 | 11:34 | 18:44 | 14 h 19 min | 80.6° |
| July | 04:39 | 11:39 | 18:39 | 14 h 00 min | 77.6° |
| August | 05:00 | 11:36 | 18:11 | 13 h 12 min | 69.2° |
| September | 05:20 | 11:26 | 17:31 | 12 h 11 min | 57.8° |
| October | 05:41 | 11:17 | 16:53 | 11 h 12 min | 46.4° |
| November | 06:08 | 11:18 | 16:28 | 10 h 20 min | 37.2° |
| December | 06:31 | 11:31 | 16:30 | 9 h 59 min | 33.7° |
A year of daylight in Bīrjand
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 Bīrjand
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
30°collects the most energy over a year: 1934 kWh per kWp.
46°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 | January kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1708 | 88% | 2.75 | 2.5× |
| 15° | 1878 | 97% | 3.68 | 1.7× |
| 30° year-round best | 1934 | 100% | 4.37 | 1.4× |
| 33° = latitude | 1932 | 100% | 4.48 | 1.3× |
| 45° | 1876 | 97% | 4.78 | 1.2× |
| 46° off-grid best | 1868 | 97% | 4.80 | 1.2× |
| 60° | 1709 | 88% | 4.89 | 1.4× |
| 70° | 1542 | 80% | 4.79 | 1.7× |
| 90° | 1111 | 57% | 4.19 | 3.2× |
A fixed array in Bīrjand produces the most over a year at 30°. The design month for an off-grid system is January: at 46° it makes 4.80 kWh per kWp a day, 10% more than at 30°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Bīrjand at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 30° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.28 | 5.36 | 4.79 | 4.37 | 3.5 °C |
| February | 4.11 | 5.22 | 4.62 | 4.73 | 5.6 °C |
| March | 5.33 | 5.16 | 4.48 | 5.29 | 10.9 °C |
| April | 6.35 | 4.47 | 3.78 | 5.40 | 16.7 °C |
| May | 7.33 | 3.93 | 3.24 | 5.53 | 22.4 °C |
| June | 8.29 | 3.66 | 2.97 | 5.79 | 26.0 °C |
| July | 8.14 | 3.85 | 3.12 | 5.81 | 26.7 °C |
| August | 7.64 | 4.63 | 3.80 | 6.00 | 24.7 °C |
| September | 6.59 | 5.68 | 4.72 | 6.01 | 21.3 °C |
| October | 5.10 | 6.06 | 5.13 | 5.46 | 16.8 °C |
| November | 3.75 | 5.81 | 5.06 | 4.74 | 9.8 °C |
| December | 3.17 | 5.64 | 5.00 | 4.42 | 5.1 °C |
| Year | 5.77 avg | 4.96 avg | 1542 kWh | 1934 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 400 Wp of panels at 70°, versus 270 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Bīrjand
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.
3.9 mrow pitch at 70°
3.4 mrow pitch at 30°
How Bīrjand compares in Iran
Against the other 422 places in Iran with climate data, for a fixed array at its best angle.
90thof 423 places in Iran for sunshine, shared: 5.77 peak sun hours a day on flat ground.
+10%solar energy a year compared with the average place in Iran: 1,934 against 1,760 kWh per kWp.
−15 mindaylight on the longest day, compared with Tehran: 14 h 19 min against 14 h 35 min.
30°best year-round tilt here; across Iran it runs from 24° in Kīsh to 33° in Khūy.
Of the 423 places in Iran, Jālq gets the most sun (6.10 peak sun hours a day) and Bandar-e Anzalī the least (3.92); Bīrjand ranks joint 90th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.97 kWh a day here, against 2.96 kWh on average in Iran. The shortest day lasts 9 h 59 min, +15 min compared with Tehran.
Solar forecast for Bīrjand, 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 Bīrjand
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Places near Bīrjand
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A free, live card for Bīrjand: 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.