Solarposition.org

Irkutsk Oblast · Russia · 58.00° N · 102.66° E

Solar position in Ust’-Ilimsk

Sun position, daylight and the best solar panel angle for Ust’-Ilimsk — computed for 58.00° N, 102.66° E, 278 m above sea level.

Sunrise today08:06112° ESE
Sunset today17:39248° WSW
Best panel angle50°year-round, facing south
Off-grid angle83°best for the darkest month

The sun right now

Azimuth180.0°
Elevation19.9°
At solar noon, 12:53Open on the sun map

Sun in Ust’-Ilimsk today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn05:54sun 18° below horizon
Nautical dawn06:3912° below
Civil dawn07:256° below
Sunrise08:06112° ESE
Golden hour ends09:05sun 6° up
Solar noon12:5319.9° high
Golden hour starts16:40sun 6° up
Sunset17:39248° WSW
Civil dusk18:206° below
Nautical dusk19:0612° below
Astronomical dusk19:5118° below
Day length9 h 33 min

Sun path diagram for Ust’-Ilimsk

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice56789101112131415161718192021EquinoxDecember solstice111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 55.4° at solar noon in Ust’-Ilimsk; on the December solstice only 8.7°. Sunrise swings from 39° NE in June to 137° SE in December — a 97° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January09:3413:2017:077 h 33 min12.2°
February08:2613:2318:209 h 54 min21.5°
March07:0913:1619:2412 h 15 min32.3°
April05:4313:0820:3414 h 51 min43.9°
May04:3413:0621:3917 h 05 min52.2°
June04:0513:1122:1618 h 11 min55.4°
July04:4013:1521:5017 h 10 min52.5°
August05:4413:1220:3814 h 54 min44.1°
September06:5113:0219:1212 h 21 min32.7°
October07:5712:5317:499 h 53 min21.3°
November09:0812:5416:417 h 33 min12.2°
December09:5313:0716:206 h 27 min8.7°

A year of daylight in Ust’-Ilimsk

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Ust’-Ilimsk

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

50°collects the most energy over a year: 1230 kWh per kWp.

83°gives the most in the darkest month — the one an off-grid system is sized for.

10%20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 50°Best worst-month 83°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°87871%0.2618.3×
15°105286%0.638.1×
30°117095%0.975.2×
45°1226100%1.254.0×
50° year-round best1230100%1.323.8×
58° = latitude122199%1.433.5×
60°121699%1.453.4×
70°117395%1.533.2×
83° off-grid best107687%1.572.9×
90°100682%1.562.7×

A fixed array in Ust’-Ilimsk produces the most over a year at 50°. The design month for an off-grid system is December: at 83° it makes 1.57 kWh per kWp a day, 19% more than at 50°, and costs 13% of the yearly total. Why steep panels win winter.

Off-grid solar in Ust’-Ilimsk at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 50° (year-round best).

0123456January: 2.30 (70°)2.3JanFebruary: 3.68 (70°)3.7FebMarch: 4.52 (70°)4.5MarApril: 4.84 (70°)4.8AprMay: 3.88 (70°)3.9MayJune: 3.82 (70°)3.8JunJuly: 3.62 (70°)3.6JulAugust: 3.59 (70°)3.6AugSeptember: 3.07 (70°)3.1SepOctober: 2.11 (70°)2.1OctNovember: 1.65 (70°)1.6NovDecember: 1.53 (70°)1.5Dec50°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 50°Mean temp.
January snow0.622.342.302.01-23.6 °C
February snow1.523.783.683.38-20.2 °C
March snow2.864.814.524.40-10.7 °C
April snow4.305.324.845.01-2.2 °C
May5.124.443.884.576.7 °C
June5.854.533.824.6516.0 °C
July5.324.323.624.3418.0 °C
August4.264.233.594.0814.9 °C
September2.673.503.073.226.8 °C
October snow1.282.342.112.01-2.4 °C
November snow0.621.751.651.48-14.5 °C
December snow0.371.581.531.32-23.4 °C
Year2.90 avg3.58 avg1173 kWh1230 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 770 Wp of panels at 70°, versus 890 Wp at 50°. The steep array is 14% smaller for the same winter. Size your own system.

Row spacing in Ust’-Ilimsk

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.

20.5 mrow pitch at 70°

17.5 mrow pitch at 50°

Row spacing calculator

How Ust’-Ilimsk compares in Russia

Against the other 979 places in Russia with climate data, for a fixed array at its best angle.

622ndof 980 places in Russia for sunshine, shared: 2.90 peak sun hours a day on flat ground.

+3%solar energy a year compared with the average place in Russia: 1,230 against 1,196 kWh per kWp.

+37 mindaylight on the longest day, compared with Moscow: 18 h 11 min against 17 h 34 min.

50°best year-round tilt here; across Russia it runs from 32° in Derbent to 54° in Yakutsk.

Of the 980 places in Russia, Novorossiysk gets the most sun (3.96 peak sun hours a day) and Polyarnyy the least (1.93); Ust’-Ilimsk ranks joint 622nd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.53 kWh a day here, against 1.31 kWh on average in Russia. The shortest day lasts 6 h 27 min, −33 min compared with Moscow.

The sunniest places in Russia

Solar forecast for Ust’-Ilimsk, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Ust’-Ilimsk

What is the best solar panel angle in Ust’-Ilimsk?
For a fixed array facing south, the best year-round tilt in Ust’-Ilimsk is 50°, worth about 1230 kWh per kWp a year. An off-grid system that has to get through December does better at about 83°.
What time is sunrise and sunset in Ust’-Ilimsk today?
On 25 October 2026 the sun rises at 08:06 and sets at 17:39 local time (UTC+8), giving 9 h 33 min of daylight. Solar noon is at 12:53.
How many peak sun hours does Ust’-Ilimsk get?
On a flat surface 2.9 hours a day averaged over the year, from 0.4 in December to 5.8 in June. Panels tilted at 70° receive 1.6 sun hours a day in December.
How high does the sun get in Ust’-Ilimsk?
At solar noon the sun stands 55.4° above the horizon on the June solstice and 8.7° on the December solstice.
Is Ust’-Ilimsk a good place for solar panels?
With 2.9 peak sun hours a day on flat ground, Ust’-Ilimsk ranks joint 622nd of 980 places in Russia for sunshine. A 1 kWp array at the best angle (50°) makes about 1,230 kWh a year here, 3% more than the average place in Russia.

Places near Ust’-Ilimsk

All places in Russia

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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.