Viljandimaa · Estonia · 58.36° N · 25.59° E
Solar position in Viljandi
Sun position, daylight and the best solar panel angle for Viljandi — computed for 58.36° N, 25.59° E, 84 m above sea level.
The sun right now
Sun in Viljandi today
Saturday, 24 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:00 | sun 18° below horizon |
| Nautical dawn | 06:46 | 12° below |
| Civil dawn | 07:32 | 6° below |
| Sunrise | 08:13 | 111° ESE |
| Golden hour ends | 09:13 | sun 6° up |
| Solar noon | 13:01 | 19.9° high |
| Golden hour starts | 16:49 | sun 6° up |
| Sunset | 17:48 | 248° WSW |
| Civil dusk | 18:29 | 6° below |
| Nautical dusk | 19:16 | 12° below |
| Astronomical dusk | 20:01 | 18° below |
| Day length | 9 h 35 min | |
Sun path diagram for Viljandi
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 55.1° at solar noon in Viljandi; on the December solstice only 8.3°. Sunrise swings from 39° NE in June to 137° SE in December — a 99° 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 | 08:44 | 12:29 | 16:13 | 7 h 30 min | 11.9° |
| February | 07:34 | 12:31 | 17:28 | 9 h 54 min | 21.2° |
| March | 06:17 | 12:25 | 18:33 | 12 h 17 min | 32.0° |
| April | 05:49 | 13:16 | 20:44 | 14 h 54 min | 43.6° |
| May | 04:39 | 13:14 | 21:50 | 17 h 11 min | 51.9° |
| June | 04:10 | 13:19 | 22:28 | 18 h 18 min | 55.1° |
| July | 04:46 | 13:23 | 22:00 | 17 h 15 min | 52.1° |
| August | 05:52 | 13:20 | 20:47 | 14 h 56 min | 43.7° |
| September | 06:59 | 13:10 | 19:20 | 12 h 20 min | 32.3° |
| October | 08:07 | 13:01 | 17:56 | 9 h 50 min | 20.9° |
| November | 08:19 | 12:03 | 15:47 | 7 h 28 min | 11.8° |
| December | 09:04 | 12:15 | 15:26 | 6 h 21 min | 8.3° |
A year of daylight in Viljandi
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 Viljandi
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: 1056 kWh per kWp.
82°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° | 809 | 77% | 0.15 | 30.2× |
| 15° | 946 | 90% | 0.29 | 17.0× |
| 30° | 1030 | 98% | 0.41 | 12.2× |
| 44° year-round best | 1056 | 100% | 0.51 | 9.7× |
| 45° | 1056 | 100% | 0.51 | 9.5× |
| 58° = latitude | 1031 | 98% | 0.58 | 7.8× |
| 60° | 1023 | 97% | 0.59 | 7.6× |
| 70° | 970 | 92% | 0.62 | 6.6× |
| 82° off-grid best | 876 | 83% | 0.63 | 5.7× |
| 90° | 797 | 75% | 0.62 | 5.5× |
A fixed array in Viljandi produces the most over a year at 44°. The design month for an off-grid system is December: at 82° it makes 0.63 kWh per kWp a day, 24% more than at 44°, and costs 17% of the yearly total. Why steep panels win winter.
Off-grid solar in Viljandi 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 | 0.35 | 1.08 | 0.97 | 0.81 | -6.5 °C |
| February snow | 0.99 | 2.16 | 1.98 | 1.76 | -6.6 °C |
| March snow | 2.39 | 4.04 | 3.67 | 3.48 | -2.4 °C |
| April | 3.94 | 4.45 | 3.94 | 4.35 | 4.4 °C |
| May | 5.36 | 4.70 | 4.06 | 4.90 | 10.9 °C |
| June | 5.58 | 4.34 | 3.67 | 4.63 | 15.1 °C |
| July | 5.27 | 4.31 | 3.60 | 4.45 | 18.4 °C |
| August | 4.17 | 4.14 | 3.49 | 4.01 | 17.1 °C |
| September | 2.62 | 3.47 | 2.98 | 3.10 | 12.2 °C |
| October | 1.23 | 2.25 | 1.97 | 1.87 | 5.4 °C |
| November | 0.41 | 1.04 | 0.91 | 0.80 | 0.6 °C |
| December snow | 0.22 | 0.70 | 0.62 | 0.51 | -3.6 °C |
| Year | 2.72 avg | 3.06 avg | 970 kWh | 1056 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 1,910 Wp of panels at 70°, versus 2,320 Wp at 44°. The steep array is 18% smaller for the same winter. Size your own system.
Row spacing in Viljandi
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.
22.0 mrow pitch at 70°
17.2 mrow pitch at 44°
How Viljandi compares in Estonia
Against the other 6 places in Estonia with climate data, for a fixed array at its best angle.
1stof 7 places in Estonia for sunshine, shared: 2.72 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Estonia: 1,056 against 1,042 kWh per kWp.
−22 mindaylight on the longest day, compared with Tallinn: 18 h 18 min against 18 h 40 min.
44°best year-round tilt here, the same everywhere in Estonia.
Viljandi shares the top spot for sunshine among the 7 places in Estonia (2.72 peak sun hours a day); the least sunny is Narva with 2.62. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 0.62 kWh a day here, against 0.51 kWh on average in Estonia. The shortest day lasts 6 h 21 min, +19 min compared with Tallinn.
Solar forecast for Viljandi, 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 Viljandi
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Places near Viljandi
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A free, live card for Viljandi: 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.