Texas · United States · 26.16° N · 97.99° W
Solar position in Weslaco
Sun position, daylight and the best solar panel angle for Weslaco — computed for 26.16° N, 97.99° W, 24 m above sea level.
The sun right now
Sun in Weslaco today
Saturday, 24 October 2026 · local time UTC−5
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:18 | sun 18° below horizon |
| Nautical dawn | 06:45 | 12° below |
| Civil dawn | 07:12 | 6° below |
| Sunrise | 07:36 | 103° ESE |
| Golden hour ends | 08:07 | sun 6° up |
| Solar noon | 13:15 | 51.9° high |
| Golden hour starts | 18:24 | sun 6° up |
| Sunset | 18:55 | 257° WSW |
| Civil dusk | 19:19 | 6° below |
| Nautical dusk | 19:46 | 12° below |
| Astronomical dusk | 20:13 | 18° below |
| Day length | 11 h 20 min | |
Sun path diagram for Weslaco
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 87.3° at solar noon in Weslaco; on the December solstice only 40.4°. 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 | 07:20 | 12:43 | 18:06 | 10 h 47 min | 44.1° |
| February | 07:02 | 12:45 | 18:28 | 11 h 26 min | 53.5° |
| March | 07:34 | 13:39 | 19:43 | 12 h 09 min | 64.3° |
| April | 07:02 | 13:30 | 19:58 | 12 h 56 min | 75.9° |
| May | 06:42 | 13:28 | 20:14 | 13 h 32 min | 84.1° |
| June | 06:40 | 13:33 | 20:27 | 13 h 47 min | 87.3° |
| July | 06:52 | 13:38 | 20:24 | 13 h 32 min | 84.2° |
| August | 07:07 | 13:35 | 20:02 | 12 h 55 min | 75.8° |
| September | 07:20 | 13:24 | 19:29 | 12 h 09 min | 64.3° |
| October | 07:34 | 13:16 | 18:58 | 11 h 24 min | 53.0° |
| November | 06:54 | 12:17 | 17:40 | 10 h 46 min | 43.8° |
| December | 07:15 | 12:30 | 17:45 | 10 h 30 min | 40.4° |
A year of daylight in Weslaco
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 Weslaco
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
22°collects the most energy over a year: 1547 kWh per kWp.
47°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° | 1449 | 94% | 2.38 | 2.2× |
| 15° | 1537 | 99% | 2.97 | 1.7× |
| 22° year-round best | 1547 | 100% | 3.18 | 1.6× |
| 26° = latitude | 1545 | 100% | 3.29 | 1.5× |
| 30° | 1535 | 99% | 3.38 | 1.4× |
| 45° | 1446 | 93% | 3.58 | 1.3× |
| 47° off-grid best | 1427 | 92% | 3.59 | 1.2× |
| 60° | 1274 | 82% | 3.57 | 1.5× |
| 70° | 1122 | 73% | 3.44 | 1.9× |
| 90° | 768 | 50% | 2.91 | 3.2× |
A fixed array in Weslaco produces the most over a year at 22°. The design month for an off-grid system is December: at 47° it makes 3.59 kWh per kWp a day, 13% more than at 22°, and costs 8% of the yearly total. Why steep panels win winter.
Off-grid solar in Weslaco at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 22° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 22° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.20 | 4.17 | 3.55 | 3.39 | 16.1 °C |
| February | 3.88 | 4.14 | 3.49 | 3.78 | 18.2 °C |
| March | 4.75 | 3.98 | 3.30 | 4.23 | 21.3 °C |
| April | 5.54 | 3.43 | 2.80 | 4.48 | 24.8 °C |
| May | 6.11 | 2.89 | 2.31 | 4.59 | 27.4 °C |
| June | 6.74 | 2.63 | 2.08 | 4.83 | 29.4 °C |
| July | 6.64 | 2.82 | 2.24 | 4.84 | 29.3 °C |
| August | 6.43 | 3.45 | 2.76 | 4.94 | 29.8 °C |
| September | 5.31 | 3.97 | 3.21 | 4.46 | 28.0 °C |
| October | 4.70 | 4.75 | 3.89 | 4.40 | 25.3 °C |
| November | 3.63 | 4.61 | 3.84 | 3.74 | 20.9 °C |
| December | 2.97 | 4.06 | 3.44 | 3.18 | 17.2 °C |
| Year | 5.00 avg | 3.74 avg | 1122 kWh | 1547 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 370 Wp at 22°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Weslaco
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°
2.8 mrow pitch at 22°
How Weslaco compares in the United States
Against the other 3,120 places in the United States with climate data, for a fixed array at its best angle.
606thof 3,121 places in the United States for sunshine, shared: 5.00 peak sun hours a day on flat ground.
+2%solar energy a year compared with the average place in the United States: 1,547 against 1,515 kWh per kWp.
−1 h 19 mindaylight on the longest day, compared with New York City: 13 h 47 min against 15 h 06 min.
22°best year-round tilt here; across the United States it runs from 18° in Honolulu to 53° in Fairbanks.
Of the 3,121 places in the United States, Fortuna Foothills and 2 other places get the most sun (5.96 peak sun hours a day) and Juneau the least (2.38); Weslaco ranks joint 606th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.08 kWh a day here, against 2.55 kWh on average in the United States. The shortest day lasts 10 h 30 min, +1 h 15 min compared with New York City.
Solar forecast for Weslaco, 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 Weslaco
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Places near Weslaco
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A free, live card for Weslaco: 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.