Uusimaa · Finland · 60.39° N · 25.67° E
Solar position in Porvoo
Sun position, daylight and the best solar panel angle for Porvoo — computed for 60.39° N, 25.67° E, 29 m above sea level.
The sun right now
Sun in Porvoo today
Sunday, 25 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:00 | sun 18° below horizon |
| Nautical dawn | 05:49 | 12° below |
| Civil dawn | 06:38 | 6° below |
| Sunrise | 07:22 | 114° ESE |
| Golden hour ends | 08:27 | sun 6° up |
| Solar noon | 12:00 | 17.5° high |
| Golden hour starts | 15:34 | sun 6° up |
| Sunset | 16:39 | 246° WSW |
| Civil dusk | 17:23 | 6° below |
| Nautical dusk | 18:12 | 12° below |
| Astronomical dusk | 19:01 | 18° below |
| Day length | 9 h 16 min | |
Sun path diagram for Porvoo
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 53.1° at solar noon in Porvoo; on the December solstice only 6.3°. Sunrise swings from 34° NE in June to 141° SE in December — a 107° 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 | 08:57 | 12:28 | 16:00 | 7 h 03 min | 9.8° |
| February | 07:40 | 12:31 | 17:22 | 9 h 42 min | 19.2° |
| March | 06:16 | 12:24 | 18:34 | 12 h 18 min | 30.0° |
| April | 05:42 | 13:16 | 20:51 | 15 h 09 min | 41.6° |
| May | 04:23 | 13:14 | 22:06 | 17 h 43 min | 49.9° |
| June | 03:48 | 13:19 | 22:49 | 19 h 01 min | 53.1° |
| July | 04:29 | 13:23 | 22:16 | 17 h 47 min | 50.0° |
| August | 05:44 | 13:20 | 20:55 | 15 h 11 min | 41.7° |
| September | 06:58 | 13:10 | 19:20 | 12 h 22 min | 30.2° |
| October | 08:12 | 13:01 | 17:50 | 9 h 38 min | 18.9° |
| November | 08:32 | 12:02 | 15:33 | 7 h 01 min | 9.7° |
| December | 09:23 | 12:15 | 15:07 | 5 h 44 min | 6.3° |
A year of daylight in Porvoo
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 Porvoo
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
44°collects the most energy over a year: 1002 kWh per kWp.
80°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° | 772 | 77% | 0.10 | 45.9× |
| 15° | 899 | 90% | 0.18 | 27.1× |
| 30° | 977 | 98% | 0.25 | 19.9× |
| 44° year-round best | 1002 | 100% | 0.30 | 15.9× |
| 45° | 1002 | 100% | 0.31 | 15.7× |
| 60° = latitude | 971 | 97% | 0.35 | 12.8× |
| 70° | 922 | 92% | 0.36 | 11.2× |
| 80° off-grid best | 851 | 85% | 0.37 | 9.8× |
| 90° | 760 | 76% | 0.36 | 9.1× |
A fixed array in Porvoo produces the most over a year at 44°. The design month for an off-grid system is December: at 80° it makes 0.37 kWh per kWp a day, 21% more than at 44°, and costs 15% of the yearly total. Why steep panels win winter.
Off-grid solar in Porvoo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 44° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 44° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 0.26 | 0.79 | 0.70 | 0.58 | -5.0 °C |
| February snow | 0.83 | 1.86 | 1.69 | 1.49 | -5.6 °C |
| March snow | 2.23 | 3.89 | 3.54 | 3.32 | -2.4 °C |
| April | 3.78 | 4.31 | 3.83 | 4.19 | 3.3 °C |
| May | 5.21 | 4.70 | 4.08 | 4.85 | 9.4 °C |
| June | 5.44 | 4.37 | 3.71 | 4.59 | 14.0 °C |
| July | 5.25 | 4.41 | 3.69 | 4.50 | 17.8 °C |
| August | 4.06 | 4.12 | 3.46 | 3.94 | 17.0 °C |
| September | 2.43 | 3.23 | 2.77 | 2.86 | 12.5 °C |
| October | 1.08 | 1.96 | 1.70 | 1.61 | 6.3 °C |
| November | 0.33 | 0.82 | 0.71 | 0.62 | 1.8 °C |
| December snow | 0.15 | 0.43 | 0.36 | 0.30 | -1.9 °C |
| Year | 2.60 avg | 2.91 avg | 922 kWh | 1002 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 3,240 Wp of panels at 70°, versus 3,880 Wp at 44°. The steep array is 16% smaller for the same winter. Size your own system.
Row spacing in Porvoo
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.
—The winter sun stays too low for rows to be shade-free; use a single row.
How Porvoo compares in Finland
Against the other 78 places in Finland with climate data, for a fixed array at its best angle.
18thof 79 places in Finland for sunshine, shared: 2.60 peak sun hours a day on flat ground.
+2%solar energy a year compared with the average place in Finland: 1,002 against 983 kWh per kWp.
+5 mindaylight on the longest day, compared with Helsinki: 19 h 01 min against 18 h 56 min.
44°best year-round tilt here; across Finland it runs from 43° in Turku to 49° in Rovaniemi.
Of the 79 places in Finland, Rauma gets the most sun (2.75 peak sun hours a day) and Rovaniemi the least (2.25); Porvoo ranks joint 18th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 0.36 kWh a day here, against 0.26 kWh on average in Finland. The shortest day lasts 5 h 44 min, −4 min compared with Helsinki.
Solar forecast for Porvoo, 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 Porvoo
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Places near Porvoo
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A free, live card for Porvoo: 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.