Coahuila · Mexico · 25.43° N · 100.98° W
Solar position in Saltillo
Sun position, daylight and the best solar panel angle for Saltillo — computed for 25.43° N, 100.98° W, 1578 m above sea level.
The sun right now
Sun in Saltillo today
Saturday, 24 October 2026 · local time UTC−6
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:30 | sun 18° below horizon |
| Nautical dawn | 05:56 | 12° below |
| Civil dawn | 06:23 | 6° below |
| Sunrise | 06:47 | 103° ESE |
| Golden hour ends | 07:18 | sun 6° up |
| Solar noon | 12:27 | 52.6° high |
| Golden hour starts | 17:37 | sun 6° up |
| Sunset | 18:08 | 257° WSW |
| Civil dusk | 18:31 | 6° below |
| Nautical dusk | 18:58 | 12° below |
| Astronomical dusk | 19:25 | 18° below |
| Day length | 11 h 21 min | |
Sun path diagram for Saltillo
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 88.0° at solar noon in Saltillo; on the December solstice only 41.2°. Sunrise swings from 63° ENE in June to 116° ESE in December — a 52° 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 | 07:30 | 12:55 | 18:20 | 10 h 49 min | 44.8° |
| February | 07:13 | 12:57 | 18:41 | 11 h 28 min | 54.2° |
| March | 06:46 | 12:51 | 18:55 | 12 h 09 min | 65.0° |
| April | 06:15 | 12:42 | 19:09 | 12 h 54 min | 76.6° |
| May | 05:56 | 12:40 | 19:25 | 13 h 29 min | 84.9° |
| June | 05:54 | 12:45 | 19:37 | 13 h 43 min | 88.0° |
| July | 06:05 | 12:50 | 19:34 | 13 h 29 min | 84.9° |
| August | 06:20 | 12:46 | 19:13 | 12 h 53 min | 76.5° |
| September | 06:32 | 12:36 | 18:41 | 12 h 09 min | 65.1° |
| October | 06:45 | 12:28 | 18:11 | 11 h 25 min | 53.7° |
| November | 07:05 | 12:29 | 17:53 | 10 h 48 min | 44.6° |
| December | 07:25 | 12:42 | 17:58 | 10 h 33 min | 41.2° |
A year of daylight in Saltillo
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 Saltillo
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
25°collects the most energy over a year: 1816 kWh per kWp.
26°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° | 1669 | 92% | 3.20 | 1.7× |
| 15° | 1793 | 99% | 4.13 | 1.3× |
| 25° year-round best = latitude | 1816 | 100% | 4.61 | 1.2× |
| 26° off-grid best | 1815 | 100% | 4.65 | 1.2× |
| 30° | 1809 | 100% | 4.80 | 1.2× |
| 45° | 1718 | 95% | 5.15 | 1.4× |
| 60° | 1528 | 84% | 5.19 | 1.9× |
| 70° | 1353 | 75% | 5.03 | 2.4× |
| 90° | 939 | 52% | 4.28 | 4.3× |
A fixed array in Saltillo produces the most over a year at 25°. The design month for an off-grid system is December: at 26° it makes 4.65 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Saltillo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 25° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 25° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.09 | 5.67 | 4.92 | 4.68 | 11.1 °C |
| February | 5.03 | 5.65 | 4.86 | 5.22 | 13.6 °C |
| March | 5.97 | 5.03 | 4.27 | 5.50 | 16.4 °C |
| April | 6.69 | 3.92 | 3.27 | 5.42 | 20.3 °C |
| May | 6.85 | 2.95 | 2.42 | 5.05 | 22.6 °C |
| June | 6.94 | 2.55 | 2.07 | 4.90 | 23.4 °C |
| July | 6.51 | 2.69 | 2.20 | 4.72 | 22.6 °C |
| August | 6.47 | 3.36 | 2.77 | 5.01 | 22.5 °C |
| September | 5.38 | 3.95 | 3.29 | 4.63 | 20.2 °C |
| October | 5.18 | 5.31 | 4.48 | 5.10 | 18.2 °C |
| November | 4.37 | 5.85 | 5.01 | 4.88 | 14.4 °C |
| December | 3.90 | 5.81 | 5.03 | 4.61 | 11.7 °C |
| Year | 5.62 avg | 4.39 avg | 1353 kWh | 1816 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 570 Wp of panels at 70°, versus 260 Wp at 25°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Saltillo
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.
3.1 mrow pitch at 70°
2.9 mrow pitch at 25°
How Saltillo compares in Mexico
Against the other 624 places in Mexico with climate data, for a fixed array at its best angle.
310thof 625 places in Mexico for sunshine, shared: 5.62 peak sun hours a day on flat ground.
+4%solar energy a year compared with the average place in Mexico: 1,816 against 1,754 kWh per kWp.
+25 mindaylight on the longest day, compared with Mexico City: 13 h 43 min against 13 h 18 min.
25°best year-round tilt here; across Mexico it runs from 15° in Coatzacoalcos to 30° in Tijuana.
Of the 625 places in Mexico, Ciudad Constitución gets the most sun (6.12 peak sun hours a day) and Poza Rica de Hidalgo and one other place the least (4.59); Saltillo ranks joint 310th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.07 kWh a day here, against 1.82 kWh on average in Mexico. The shortest day lasts 10 h 33 min, −24 min compared with Mexico City.
Solar forecast for Saltillo, 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 Saltillo
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Places near Saltillo
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A free, live card for Saltillo: 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.