Ulaanbaatar · Mongolia · 47.91° N · 106.88° E
Solar position in Ulan Bator
Sun position, daylight and the best solar panel angle for Ulan Bator — computed for 47.91° N, 106.88° E, 1284 m above sea level.
The sun right now
Sun in Ulan Bator today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:42 | sun 18° below horizon |
| Nautical dawn | 06:17 | 12° below |
| Civil dawn | 06:54 | 6° below |
| Sunrise | 07:25 | 107° ESE |
| Golden hour ends | 08:09 | sun 6° up |
| Solar noon | 12:36 | 30.0° high |
| Golden hour starts | 17:02 | sun 6° up |
| Sunset | 17:46 | 253° WSW |
| Civil dusk | 18:18 | 6° below |
| Nautical dusk | 18:54 | 12° below |
| Astronomical dusk | 19:30 | 18° below |
| Day length | 10 h 21 min | |
Sun path diagram for Ulan Bator
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 65.5° at solar noon in Ulan Bator; on the December solstice only 18.7°. Sunrise swings from 52° NE in June to 125° SE in December — a 73° 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 | 08:32 | 13:03 | 17:35 | 9 h 03 min | 22.2° |
| February | 07:48 | 13:06 | 18:23 | 10 h 35 min | 31.6° |
| March | 06:54 | 12:59 | 19:06 | 12 h 12 min | 42.3° |
| April | 05:52 | 12:51 | 19:50 | 13 h 58 min | 54.0° |
| May | 05:07 | 12:49 | 20:31 | 15 h 24 min | 62.3° |
| June | 04:53 | 12:54 | 20:55 | 16 h 02 min | 65.5° |
| July | 05:15 | 12:58 | 20:42 | 15 h 27 min | 62.6° |
| August | 05:55 | 12:55 | 19:55 | 14 h 00 min | 54.2° |
| September | 06:37 | 12:45 | 18:53 | 12 h 16 min | 42.8° |
| October | 07:19 | 12:36 | 17:53 | 10 h 34 min | 31.4° |
| November | 08:06 | 12:38 | 17:09 | 9 h 02 min | 22.2° |
| December | 08:38 | 12:50 | 17:01 | 8 h 23 min | 18.7° |
A year of daylight in Ulan Bator
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 Ulan Bator
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
47°collects the most energy over a year: 1780 kWh per kWp.
62°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° | 1306 | 73% | 1.23 | 4.5× |
| 15° | 1555 | 87% | 2.12 | 2.8× |
| 30° | 1716 | 96% | 2.89 | 2.0× |
| 45° | 1779 | 100% | 3.48 | 1.7× |
| 47° year-round best | 1780 | 100% | 3.55 | 1.7× |
| 48° = latitude | 1779 | 100% | 3.58 | 1.7× |
| 60° | 1742 | 98% | 3.87 | 1.6× |
| 62° off-grid best | 1729 | 97% | 3.90 | 1.6× |
| 70° | 1663 | 93% | 4.00 | 1.7× |
| 90° | 1389 | 78% | 3.93 | 2.4× |
A fixed array in Ulan Bator produces the most over a year at 47°. The design month for an off-grid system is December: at 62° it makes 3.90 kWh per kWp a day, 10% more than at 47°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Ulan Bator at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 47° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 47° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.92 | 5.01 | 4.87 | 4.36 | -20.3 °C |
| February snow | 3.08 | 6.20 | 5.95 | 5.59 | -17.2 °C |
| March snow | 4.47 | 6.57 | 6.10 | 6.11 | -8.1 °C |
| April | 5.64 | 5.31 | 4.78 | 5.60 | 1.0 °C |
| May | 6.54 | 4.78 | 4.17 | 5.35 | 7.9 °C |
| June | 6.54 | 4.29 | 3.63 | 4.82 | 15.4 °C |
| July | 6.13 | 4.20 | 3.52 | 4.61 | 17.9 °C |
| August | 5.44 | 4.54 | 3.86 | 4.72 | 15.3 °C |
| September | 4.53 | 5.25 | 4.59 | 5.06 | 8.3 °C |
| October snow | 3.13 | 5.31 | 4.82 | 4.74 | -0.8 °C |
| November snow | 1.96 | 4.76 | 4.48 | 4.07 | -10.7 °C |
| December snow | 1.47 | 4.14 | 4.00 | 3.55 | -18.4 °C |
| Year | 4.24 avg | 5.02 avg | 1663 kWh | 1780 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 330 Wp of panels at 70°, versus 330 Wp at 47°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Ulan Bator
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.
7.5 mrow pitch at 70°
6.6 mrow pitch at 47°
How Ulan Bator compares in Mongolia
Against the other 23 places in Mongolia with climate data, for a fixed array at its best angle.
13thof 24 places in Mongolia for sunshine, shared: 4.24 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Mongolia: 1,780 against 1,757 kWh per kWp.
+2 mindaylight on the longest day, compared with the average place in Mongolia: 16 h 02 min against 16 h 00 min.
47°best year-round tilt here; across Mongolia it runs from 43° in Ulaangom to 48° in Mörön.
Of the 24 places in Mongolia, Bogd gets the most sun (4.71 peak sun hours a day) and Sühbaatar the least (3.82); Ulan Bator ranks joint 13th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 3.53 kWh a day here, against 3.47 kWh on average in Mongolia. The shortest day lasts 8 h 23 min, −2 min compared with the average.
Solar forecast for Ulan Bator, 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 Ulan Bator: 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.