Ústí nad Labem Region · Czechia · 50.78° N · 14.21° E
Solar position in Děčín
Sun position, daylight and the best solar panel angle for Děčín — computed for 50.78° N, 14.21° E, 135 m above sea level.
The sun right now
Sun in Děčín today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:50 | sun 18° below horizon |
| Nautical dawn | 06:28 | 12° below |
| Civil dawn | 07:07 | 6° below |
| Sunrise | 07:40 | 108° ESE |
| Golden hour ends | 08:27 | sun 6° up |
| Solar noon | 12:47 | 27.4° high |
| Golden hour starts | 17:06 | sun 6° up |
| Sunset | 17:52 | 252° WSW |
| Civil dusk | 18:26 | 6° below |
| Nautical dusk | 19:05 | 12° below |
| Astronomical dusk | 19:42 | 18° below |
| Day length | 10 h 12 min | |
Sun path diagram for Děčín
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 62.7° at solar noon in Děčín; on the December solstice only 15.8°. Sunrise swings from 50° NE in June to 128° SE in December — a 78° 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 | 07:53 | 12:14 | 16:35 | 8 h 43 min | 19.4° |
| February | 07:03 | 12:17 | 17:30 | 10 h 26 min | 28.8° |
| March | 06:03 | 12:10 | 18:17 | 12 h 14 min | 39.6° |
| April | 05:56 | 13:02 | 20:07 | 14 h 11 min | 51.2° |
| May | 05:06 | 12:59 | 20:53 | 15 h 48 min | 59.5° |
| June | 04:49 | 13:04 | 21:20 | 16 h 31 min | 62.7° |
| July | 05:14 | 13:09 | 21:04 | 15 h 50 min | 59.6° |
| August | 05:59 | 13:06 | 20:11 | 14 h 12 min | 51.2° |
| September | 06:47 | 12:55 | 19:03 | 12 h 16 min | 39.8° |
| October | 07:35 | 12:47 | 17:58 | 10 h 23 min | 28.5° |
| November | 07:28 | 11:48 | 16:09 | 8 h 41 min | 19.3° |
| December | 08:02 | 12:01 | 15:59 | 7 h 57 min | 15.8° |
A year of daylight in Děčín
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 Děčín
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
39°collects the most energy over a year: 1068 kWh per kWp.
73°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° | 879 | 82% | 0.46 | 9.4× |
| 15° | 996 | 93% | 0.71 | 6.3× |
| 30° | 1058 | 99% | 0.93 | 4.8× |
| 39° year-round best | 1068 | 100% | 1.03 | 4.1× |
| 45° | 1062 | 99% | 1.09 | 3.8× |
| 51° = latitude | 1048 | 98% | 1.14 | 3.5× |
| 60° | 1009 | 94% | 1.19 | 3.2× |
| 70° | 943 | 88% | 1.22 | 2.9× |
| 73° off-grid best | 918 | 86% | 1.22 | 2.8× |
| 90° | 749 | 70% | 1.17 | 2.3× |
A fixed array in Děčín produces the most over a year at 39°. The design month for an off-grid system is December: at 73° it makes 1.22 kWh per kWp a day, 18% more than at 39°, and costs 14% of the yearly total. Why steep panels win winter.
Off-grid solar in Děčín at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 39° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 39° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 0.79 | 1.69 | 1.52 | 1.29 | -2.0 °C |
| February snow | 1.53 | 2.51 | 2.25 | 2.10 | -0.7 °C |
| March | 2.61 | 3.25 | 2.88 | 3.02 | 3.2 °C |
| April | 4.13 | 3.99 | 3.47 | 4.06 | 8.7 °C |
| May | 4.94 | 3.84 | 3.27 | 4.23 | 13.5 °C |
| June | 5.33 | 3.77 | 3.15 | 4.26 | 17.7 °C |
| July | 5.13 | 3.77 | 3.13 | 4.15 | 19.9 °C |
| August | 4.40 | 3.83 | 3.20 | 3.91 | 19.4 °C |
| September | 3.18 | 3.62 | 3.08 | 3.36 | 14.4 °C |
| October | 1.86 | 2.76 | 2.39 | 2.35 | 8.9 °C |
| November | 0.88 | 1.62 | 1.42 | 1.29 | 3.7 °C |
| December snow | 0.61 | 1.37 | 1.22 | 1.03 | -0.5 °C |
| Year | 2.96 avg | 3.00 avg | 943 kWh | 1068 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 970 Wp of panels at 70°, versus 1,140 Wp at 39°. The steep array is 15% smaller for the same winter. Size your own system.
Row spacing in Děčín
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.
9.1 mrow pitch at 70°
7.2 mrow pitch at 39°
How Děčín compares in Czechia
Against the other 95 places in Czechia with climate data, for a fixed array at its best angle.
86thof 96 places in Czechia for sunshine, shared: 2.96 peak sun hours a day on flat ground.
−4%solar energy a year compared with the average place in Czechia: 1,068 against 1,107 kWh per kWp.
+7 mindaylight on the longest day, compared with Prague: 16 h 30 min against 16 h 23 min.
39°best year-round tilt here; across Czechia it runs from 38° in Prague to 39° in Ostrava.
Of the 96 places in Czechia, Břeclav gets the most sun (3.25 peak sun hours a day) and Děčín and 10 other places the least (2.96); Děčín ranks joint 86th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.22 kWh a day here, against 1.35 kWh on average in Czechia. The shortest day lasts 7 h 57 min, −7 min compared with Prague.
Solar forecast for Děčín, 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 Děčín
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A free, live card for Děčín: 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.