Iași County · Romania · 47.17° N · 27.60° E
Solar position in Iaşi
Sun position, daylight and the best solar panel angle for Iaşi — computed for 47.17° N, 27.60° E, 66 m above sea level.
The sun right now
Sun in Iaşi today
Saturday, 24 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:58 | sun 18° below horizon |
| Nautical dawn | 06:33 | 12° below |
| Civil dawn | 07:09 | 6° below |
| Sunrise | 07:40 | 106° ESE |
| Golden hour ends | 08:23 | sun 6° up |
| Solar noon | 12:53 | 31.0° high |
| Golden hour starts | 17:23 | sun 6° up |
| Sunset | 18:06 | 253° WSW |
| Civil dusk | 18:37 | 6° below |
| Nautical dusk | 19:13 | 12° below |
| Astronomical dusk | 19:48 | 18° below |
| Day length | 10 h 26 min | |
Sun path diagram for Iaşi
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 66.3° at solar noon in Iaşi; on the December solstice only 19.4°. Sunrise swings from 53° NE in June to 125° SE in December — a 72° 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 | 07:47 | 12:21 | 16:55 | 9 h 08 min | 23.0° |
| February | 07:04 | 12:23 | 17:42 | 10 h 38 min | 32.4° |
| March | 06:10 | 12:17 | 18:23 | 12 h 12 min | 43.2° |
| April | 06:10 | 13:08 | 20:06 | 13 h 56 min | 54.8° |
| May | 05:27 | 13:06 | 20:45 | 15 h 19 min | 63.1° |
| June | 05:13 | 13:11 | 21:09 | 15 h 55 min | 66.3° |
| July | 05:35 | 13:15 | 20:56 | 15 h 21 min | 63.3° |
| August | 06:14 | 13:12 | 20:10 | 13 h 56 min | 54.9° |
| September | 06:54 | 13:02 | 19:09 | 12 h 15 min | 43.5° |
| October | 07:36 | 12:53 | 18:11 | 10 h 35 min | 32.1° |
| November | 07:21 | 11:55 | 16:28 | 9 h 07 min | 22.9° |
| December | 07:53 | 12:07 | 16:22 | 8 h 29 min | 19.4° |
A year of daylight in Iaşi
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 Iaşi
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
37°collects the most energy over a year: 1275 kWh per kWp.
71°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° | 1057 | 83% | 0.75 | 6.5× |
| 15° | 1195 | 94% | 1.13 | 4.4× |
| 30° | 1266 | 99% | 1.45 | 3.4× |
| 37° year-round best | 1275 | 100% | 1.57 | 3.0× |
| 45° | 1265 | 99% | 1.68 | 2.7× |
| 47° = latitude | 1260 | 99% | 1.71 | 2.7× |
| 60° | 1194 | 94% | 1.82 | 2.3× |
| 70° | 1109 | 87% | 1.85 | 2.0× |
| 71° off-grid best | 1099 | 86% | 1.85 | 2.0× |
| 90° | 866 | 68% | 1.77 | 1.6× |
A fixed array in Iaşi produces the most over a year at 37°. The design month for an off-grid system is December: at 71° it makes 1.85 kWh per kWp a day, 18% more than at 37°, and costs 14% of the yearly total. Why steep panels win winter.
Off-grid solar in Iaşi at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 37° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 37° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.21 | 2.45 | 2.23 | 1.89 | -3.5 °C |
| February snow | 1.97 | 2.99 | 2.70 | 2.56 | -1.5 °C |
| March | 3.21 | 3.88 | 3.44 | 3.66 | 4.1 °C |
| April | 4.54 | 4.15 | 3.59 | 4.34 | 10.4 °C |
| May | 5.64 | 4.14 | 3.49 | 4.71 | 16.7 °C |
| June | 6.02 | 3.96 | 3.27 | 4.69 | 20.9 °C |
| July | 6.04 | 4.13 | 3.39 | 4.76 | 23.3 °C |
| August | 5.42 | 4.51 | 3.72 | 4.73 | 22.9 °C |
| September | 3.89 | 4.27 | 3.60 | 4.01 | 17.2 °C |
| October | 2.44 | 3.59 | 3.11 | 3.07 | 10.2 °C |
| November | 1.28 | 2.31 | 2.04 | 1.86 | 4.1 °C |
| December snow | 0.95 | 2.06 | 1.85 | 1.57 | -1.6 °C |
| Year | 3.56 avg | 3.54 avg | 1109 kWh | 1275 kWh |
Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 640 Wp of panels at 70°, versus 750 Wp at 37°. The steep array is 15% smaller for the same winter. Size your own system.
Row spacing in Iaşi
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.
7.1 mrow pitch at 70°
5.7 mrow pitch at 37°
How Iaşi compares in Romania
Against the other 125 places in Romania with climate data, for a fixed array at its best angle.
78thof 126 places in Romania for sunshine, shared: 3.56 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Romania: 1,275 against 1,300 kWh per kWp.
+23 mindaylight on the longest day, compared with Bucharest: 15 h 55 min against 15 h 33 min.
37°best year-round tilt here; across Romania it runs from 33° in Mangalia to 39° in Bistriţa.
Of the 126 places in Romania, Mangalia gets the most sun (3.93 peak sun hours a day) and Vişeu de Sus and one other place the least (3.33); Iaşi ranks joint 78th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.85 kWh a day here, against 2.01 kWh on average in Romania. The shortest day lasts 8 h 29 min, −21 min compared with Bucharest.
Solar forecast for Iaşi, 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 Iaşi
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A free, live card for Iaşi: 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.