Koshi · Nepal · 26.91° N · 87.93° E
Solar position in Ilām
Sun position, daylight and the best solar panel angle for Ilām — computed for 26.91° N, 87.93° E, 1218 m above sea level.
The sun right now
Sun in Ilām today
Saturday, 24 October 2026 · local time UTC+5:45
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:39 | sun 18° below horizon |
| Nautical dawn | 05:06 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 05:57 | 103° ESE |
| Golden hour ends | 06:29 | sun 6° up |
| Solar noon | 11:37 | 51.3° high |
| Golden hour starts | 16:45 | sun 6° up |
| Sunset | 17:16 | 257° WSW |
| Civil dusk | 17:40 | 6° below |
| Nautical dusk | 18:07 | 12° below |
| Astronomical dusk | 18:34 | 18° below |
| Day length | 11 h 19 min | |
Sun path diagram for Ilām
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 86.5° at solar noon in Ilām; on the December solstice only 39.7°. Sunrise swings from 63° ENE in June to 116° ESE in December — a 53° 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 | 06:42 | 12:04 | 17:26 | 10 h 44 min | 43.2° |
| February | 06:24 | 12:07 | 17:49 | 11 h 24 min | 52.6° |
| March | 05:56 | 12:00 | 18:04 | 12 h 08 min | 63.4° |
| April | 05:23 | 11:52 | 18:20 | 12 h 57 min | 75.0° |
| May | 05:02 | 11:49 | 18:37 | 13 h 34 min | 83.3° |
| June | 04:59 | 11:55 | 18:50 | 13 h 50 min | 86.5° |
| July | 05:11 | 11:59 | 18:47 | 13 h 35 min | 83.5° |
| August | 05:27 | 11:56 | 18:25 | 12 h 57 min | 75.2° |
| September | 05:41 | 11:46 | 17:51 | 12 h 10 min | 63.8° |
| October | 05:56 | 11:37 | 17:19 | 11 h 23 min | 52.4° |
| November | 06:17 | 11:38 | 17:00 | 10 h 43 min | 43.2° |
| December | 06:37 | 11:51 | 17:04 | 10 h 27 min | 39.7° |
A year of daylight in Ilām
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 Ilām
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
28°collects the most energy over a year: 1421 kWh per kWp.
12°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 | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1288 | 91% | 3.36 | 1.5× |
| 12° off-grid best | 1377 | 97% | 3.32 | 1.3× |
| 15° | 1392 | 98% | 3.29 | 1.3× |
| 27° = latitude | 1421 | 100% | 3.12 | 1.4× |
| 28° year-round best | 1421 | 100% | 3.11 | 1.5× |
| 30° | 1420 | 100% | 3.07 | 1.5× |
| 45° | 1371 | 96% | 2.71 | 1.7× |
| 60° | 1248 | 88% | 2.23 | 2.1× |
| 70° | 1130 | 80% | 1.88 | 2.4× |
| 90° | 832 | 59% | 1.20 | 3.1× |
A fixed array in Ilām produces the most over a year at 28°. The design month for an off-grid system is July: at 12° it makes 3.32 kWh per kWp a day, 7% more than at 28°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Ilām at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 28° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 28° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.38 | 4.39 | 3.83 | 3.81 | 9.0 °C |
| February | 4.10 | 4.35 | 3.76 | 4.17 | 11.8 °C |
| March | 4.96 | 4.18 | 3.55 | 4.51 | 16.0 °C |
| April | 5.34 | 3.41 | 2.84 | 4.32 | 19.7 °C |
| May | 5.18 | 2.75 | 2.25 | 3.88 | 21.6 °C |
| June | 4.60 | 2.38 | 1.93 | 3.36 | 22.7 °C |
| July | 4.19 | 2.31 | 1.88 | 3.11 | 21.9 °C |
| August | 4.41 | 2.71 | 2.22 | 3.41 | 21.7 °C |
| September | 4.11 | 3.06 | 2.53 | 3.44 | 20.4 °C |
| October | 4.35 | 4.31 | 3.64 | 4.22 | 17.5 °C |
| November | 3.97 | 5.19 | 4.46 | 4.45 | 13.8 °C |
| December | 3.41 | 4.93 | 4.29 | 4.06 | 10.4 °C |
| Year | 4.33 avg | 3.66 avg | 1130 kWh | 1421 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 630 Wp of panels at 70°, versus 380 Wp at 28°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Ilām
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.
3.2 mrow pitch at 70°
3.0 mrow pitch at 28°
How Ilām compares in Nepal
Against the other 45 places in Nepal with climate data, for a fixed array at its best angle.
46thof 46 places in Nepal for sunshine: 4.33 peak sun hours a day on flat ground.
−8%solar energy a year compared with the average place in Nepal: 1,421 against 1,548 kWh per kWp.
−4 mindaylight on the longest day, compared with Kathmandu: 13 h 50 min against 13 h 54 min.
28°best year-round tilt here; across Nepal it runs from 25° in Rājbirāj to 31° in Dipayal.
Ilām gets the least sun of the 46 places in Nepal (4.33 peak sun hours a day); the sunniest is Dārchulā with 5.04. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.88 kWh a day here, against 1.97 kWh on average in Nepal. The shortest day lasts 10 h 27 min, +3 min compared with Kathmandu.
Solar forecast for Ilām, 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 Ilām
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Places near Ilām
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A free, live card for Ilām: 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.