Ústí nad Labem Region · Czechia · 50.38° N · 13.27° E
Solar position in Kadaň
Sun position, daylight and the best solar panel angle for Kadaň — computed for 50.38° N, 13.27° E, 302 m above sea level.
The sun right now
Sun in Kadaň today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:54 | sun 18° below horizon |
| Nautical dawn | 06:32 | 12° below |
| Civil dawn | 07:10 | 6° below |
| Sunrise | 07:43 | 108° ESE |
| Golden hour ends | 08:30 | sun 6° up |
| Solar noon | 12:50 | 27.8° high |
| Golden hour starts | 17:11 | sun 6° up |
| Sunset | 17:57 | 252° WSW |
| Civil dusk | 18:31 | 6° below |
| Nautical dusk | 19:08 | 12° below |
| Astronomical dusk | 19:46 | 18° below |
| Day length | 10 h 14 min | |
Sun path diagram for Kadaň
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 63.1° at solar noon in Kadaň; on the December solstice only 16.2°. Sunrise swings from 50° NE in June to 127° SE in December — a 77° 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 | 07:55 | 12:18 | 16:41 | 8 h 46 min | 19.8° |
| February | 07:07 | 12:20 | 17:34 | 10 h 28 min | 29.2° |
| March | 06:07 | 12:14 | 18:21 | 12 h 14 min | 40.0° |
| April | 06:01 | 13:05 | 20:10 | 14 h 09 min | 51.6° |
| May | 05:11 | 13:03 | 20:55 | 15 h 44 min | 59.9° |
| June | 04:55 | 13:08 | 21:21 | 16 h 26 min | 63.1° |
| July | 05:19 | 13:13 | 21:06 | 15 h 46 min | 60.0° |
| August | 06:04 | 13:09 | 20:14 | 14 h 10 min | 51.6° |
| September | 06:51 | 12:59 | 19:07 | 12 h 16 min | 40.2° |
| October | 07:38 | 12:51 | 18:03 | 10 h 24 min | 28.9° |
| November | 07:30 | 11:52 | 16:14 | 8 h 44 min | 19.7° |
| December | 08:04 | 12:04 | 16:05 | 8 h 01 min | 16.2° |
A year of daylight in Kadaň
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 Kadaň
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: 1077 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° | 889 | 82% | 0.50 | 8.8× |
| 15° | 1005 | 93% | 0.77 | 5.9× |
| 30° | 1068 | 99% | 1.00 | 4.4× |
| 39° year-round best | 1077 | 100% | 1.11 | 3.8× |
| 45° | 1072 | 99% | 1.17 | 3.5× |
| 50° = latitude | 1060 | 98% | 1.22 | 3.2× |
| 60° | 1018 | 94% | 1.28 | 2.9× |
| 70° | 951 | 88% | 1.31 | 2.6× |
| 73° off-grid best | 927 | 86% | 1.31 | 2.5× |
| 90° | 756 | 70% | 1.26 | 2.1× |
A fixed array in Kadaň produces the most over a year at 39°. The design month for an off-grid system is December: at 73° it makes 1.31 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 Kadaň 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 | 0.83 | 1.75 | 1.58 | 1.34 | -2.4 °C |
| February snow | 1.60 | 2.61 | 2.36 | 2.20 | -1.3 °C |
| March | 2.67 | 3.30 | 2.94 | 3.09 | 2.7 °C |
| April | 4.12 | 3.94 | 3.44 | 4.04 | 8.0 °C |
| May | 4.86 | 3.76 | 3.21 | 4.15 | 12.6 °C |
| June | 5.31 | 3.73 | 3.13 | 4.24 | 16.7 °C |
| July | 5.17 | 3.77 | 3.14 | 4.18 | 18.9 °C |
| August | 4.39 | 3.79 | 3.17 | 3.89 | 18.5 °C |
| September | 3.20 | 3.59 | 3.07 | 3.36 | 13.6 °C |
| October | 1.91 | 2.80 | 2.44 | 2.41 | 8.3 °C |
| November | 0.93 | 1.69 | 1.49 | 1.36 | 3.1 °C |
| December snow | 0.65 | 1.47 | 1.31 | 1.11 | -0.9 °C |
| Year | 2.98 avg | 3.02 avg | 951 kWh | 1077 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 900 Wp of panels at 70°, versus 1,060 Wp at 39°. The steep array is 15% smaller for the same winter. Size your own system.
Row spacing in Kadaň
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.
8.8 mrow pitch at 70°
7.0 mrow pitch at 39°
How Kadaň compares in Czechia
Against the other 95 places in Czechia with climate data, for a fixed array at its best angle.
81stof 96 places in Czechia for sunshine, shared: 2.98 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Czechia: 1,077 against 1,107 kWh per kWp.
+3 mindaylight on the longest day, compared with Prague: 16 h 26 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); Kadaň ranks joint 81st. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.31 kWh a day here, against 1.35 kWh on average in Czechia. The shortest day lasts 8 h 01 min, −3 min compared with Prague.
Solar forecast for Kadaň, 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 Kadaň
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A free, live card for Kadaň: 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.