Mazovia · Poland · 53.09° N · 21.58° E
Solar position in Ostrołęka
Sun position, daylight and the best solar panel angle for Ostrołęka — computed for 53.09° N, 21.58° E, 97 m above sea level.
The sun right now
Sun in Ostrołęka today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:20 | sun 18° below horizon |
| Nautical dawn | 06:00 | 12° below |
| Civil dawn | 06:40 | 6° below |
| Sunrise | 07:16 | 109° ESE |
| Golden hour ends | 08:06 | sun 6° up |
| Solar noon | 12:17 | 25.1° high |
| Golden hour starts | 16:28 | sun 6° up |
| Sunset | 17:18 | 251° WSW |
| Civil dusk | 17:54 | 6° below |
| Nautical dusk | 18:34 | 12° below |
| Astronomical dusk | 19:14 | 18° below |
| Day length | 10 h 02 min | |
Sun path diagram for Ostrołęka
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 60.4° at solar noon in Ostrołęka; on the December solstice only 13.5°. Sunrise swings from 47° NE in June to 130° SE in December — a 83° 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 | 07:33 | 11:45 | 15:57 | 8 h 24 min | 17.1° |
| February | 06:38 | 11:47 | 16:56 | 10 h 18 min | 26.5° |
| March | 05:34 | 11:41 | 17:48 | 12 h 14 min | 37.3° |
| April | 05:21 | 12:32 | 19:44 | 14 h 23 min | 48.9° |
| May | 04:26 | 12:30 | 20:35 | 16 h 09 min | 57.2° |
| June | 04:06 | 12:35 | 21:04 | 16 h 57 min | 60.4° |
| July | 04:33 | 12:40 | 20:45 | 16 h 11 min | 57.3° |
| August | 05:24 | 12:36 | 19:48 | 14 h 24 min | 49.0° |
| September | 06:17 | 12:26 | 18:34 | 12 h 17 min | 37.5° |
| October | 07:10 | 12:17 | 17:24 | 10 h 14 min | 26.2° |
| November | 07:08 | 11:19 | 15:30 | 8 h 22 min | 17.0° |
| December | 07:45 | 11:31 | 15:18 | 7 h 33 min | 13.5° |
A year of daylight in Ostrołęka
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 Ostrołęka
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
40°collects the most energy over a year: 1088 kWh per kWp.
75°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° | 880 | 81% | 0.33 | 13.8× |
| 15° | 1005 | 92% | 0.54 | 9.0× |
| 30° | 1075 | 99% | 0.71 | 6.7× |
| 40° year-round best | 1088 | 100% | 0.81 | 5.7× |
| 45° | 1085 | 100% | 0.85 | 5.3× |
| 53° = latitude | 1065 | 98% | 0.90 | 4.7× |
| 60° | 1034 | 95% | 0.94 | 4.3× |
| 70° | 969 | 89% | 0.96 | 3.8× |
| 75° off-grid best | 928 | 85% | 0.97 | 3.6× |
| 90° | 774 | 71% | 0.94 | 3.1× |
A fixed array in Ostrołęka produces the most over a year at 40°. The design month for an off-grid system is December: at 75° it makes 0.97 kWh per kWp a day, 19% more than at 40°, and costs 15% of the yearly total. Why steep panels win winter.
Off-grid solar in Ostrołęka at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 40° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 40° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 0.63 | 1.47 | 1.33 | 1.11 | -4.6 °C |
| February snow | 1.35 | 2.43 | 2.21 | 1.98 | -3.1 °C |
| March | 2.63 | 3.50 | 3.13 | 3.22 | 1.6 °C |
| April | 4.16 | 4.24 | 3.70 | 4.25 | 7.9 °C |
| May | 5.25 | 4.23 | 3.61 | 4.58 | 13.7 °C |
| June | 5.63 | 4.08 | 3.42 | 4.56 | 17.2 °C |
| July | 5.25 | 3.99 | 3.31 | 4.31 | 19.7 °C |
| August | 4.51 | 4.10 | 3.43 | 4.12 | 19.0 °C |
| September | 3.16 | 3.80 | 3.25 | 3.48 | 14.0 °C |
| October | 1.70 | 2.69 | 2.35 | 2.27 | 7.7 °C |
| November | 0.69 | 1.34 | 1.17 | 1.05 | 2.9 °C |
| December snow | 0.45 | 1.09 | 0.96 | 0.81 | -1.9 °C |
| Year | 2.96 avg | 3.08 avg | 969 kWh | 1088 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 1,230 Wp of panels at 70°, versus 1,460 Wp at 40°. The steep array is 16% smaller for the same winter. Size your own system.
Row spacing in Ostrołęka
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.
11.0 mrow pitch at 70°
8.6 mrow pitch at 40°
How Ostrołęka compares in Poland
Against the other 343 places in Poland with climate data, for a fixed array at its best angle.
243rdof 344 places in Poland for sunshine, shared: 2.96 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in Poland: 1,088 against 1,094 kWh per kWp.
+10 mindaylight on the longest day, compared with Warsaw: 16 h 57 min against 16 h 47 min.
40°best year-round tilt here; across Poland it runs from 39° in Warsaw to 41° in Bartoszyce.
Of the 344 places in Poland, Hrubieszów and 4 other places get the most sun (3.11 peak sun hours a day) and Kostrzyn nad Odrą and 3 other places the least (2.89); Ostrołęka ranks joint 243rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 0.96 kWh a day here, against 1.14 kWh on average in Poland. The shortest day lasts 7 h 33 min, −9 min compared with Warsaw.
Solar forecast for Ostrołęka, 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 Ostrołęka: 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.