San José Department · Uruguay · 34.34° S · 56.71° W
Solar position in San José de Mayo
Sun position, daylight and the best solar panel angle for San José de Mayo — computed for 34.34° S, 56.71° W, 53 m above sea level.
The sun right now
Sun in San José de Mayo today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:24 | sun 18° below horizon |
| Nautical dawn | 04:56 | 12° below |
| Civil dawn | 05:27 | 6° below |
| Sunrise | 05:54 | 105° ESE |
| Golden hour ends | 06:27 | sun 6° up |
| Solar noon | 12:31 | 67.6° high |
| Golden hour starts | 18:34 | sun 6° up |
| Sunset | 19:08 | 255° WSW |
| Civil dusk | 19:34 | 6° below |
| Nautical dusk | 20:05 | 12° below |
| Astronomical dusk | 20:38 | 18° below |
| Day length | 13 h 14 min | |
Sun path diagram for San José de Mayo
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 32.2° at solar noon in San José de Mayo; on the December solstice only 79.1°. Sunrise swings from 62° ENE in June to 119° ESE in December — a 58° 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 | 05:56 | 12:58 | 19:59 | 14 h 03 min | 75.5° |
| February | 06:27 | 13:00 | 19:32 | 13 h 06 min | 66.1° |
| March | 06:50 | 12:53 | 18:56 | 12 h 06 min | 55.3° |
| April | 07:14 | 12:45 | 18:15 | 11 h 01 min | 43.7° |
| May | 07:37 | 12:43 | 17:49 | 10 h 12 min | 35.4° |
| June | 07:52 | 12:48 | 17:44 | 9 h 51 min | 32.2° |
| July | 07:47 | 12:53 | 17:59 | 10 h 11 min | 35.3° |
| August | 07:19 | 12:50 | 18:21 | 11 h 02 min | 43.7° |
| September | 06:37 | 12:40 | 18:42 | 12 h 05 min | 55.1° |
| October | 05:57 | 12:31 | 19:05 | 13 h 08 min | 66.5° |
| November | 05:30 | 12:32 | 19:35 | 14 h 04 min | 75.7° |
| December | 05:31 | 12:44 | 19:58 | 14 h 27 min | 79.1° |
A year of daylight in San José de Mayo
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 San José de Mayo
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
29°collects the most energy over a year: 1603 kWh per kWp.
59°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 | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1428 | 89% | 1.82 | 3.3× |
| 15° | 1562 | 97% | 2.46 | 2.4× |
| 29° year-round best | 1603 | 100% | 2.91 | 1.9× |
| 30° | 1603 | 100% | 2.94 | 1.9× |
| 34° = latitude | 1598 | 100% | 3.03 | 1.7× |
| 45° | 1550 | 97% | 3.23 | 1.5× |
| 59° off-grid best | 1420 | 89% | 3.32 | 1.3× |
| 60° | 1408 | 88% | 3.32 | 1.3× |
| 70° | 1268 | 79% | 3.27 | 1.4× |
| 90° | 911 | 57% | 2.90 | 2.2× |
A fixed array in San José de Mayo produces the most over a year at 29°. The design month for an off-grid system is June: at 59° it makes 3.32 kWh per kWp a day, 14% more than at 29°, and costs 11% of the yearly total. Why steep panels win winter.
Off-grid solar in San José de Mayo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 29° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 29° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.35 | 3.78 | 3.09 | 5.48 | 24.2 °C |
| February | 6.33 | 4.26 | 3.51 | 5.20 | 23.3 °C |
| March | 5.27 | 4.76 | 3.96 | 4.88 | 21.1 °C |
| April | 3.89 | 4.73 | 4.00 | 4.17 | 17.5 °C |
| May | 2.71 | 3.99 | 3.42 | 3.22 | 13.8 °C |
| June | 2.27 | 3.77 | 3.27 | 2.91 | 10.9 °C |
| July | 2.40 | 3.74 | 3.25 | 2.98 | 9.9 °C |
| August | 3.21 | 4.20 | 3.63 | 3.63 | 11.5 °C |
| September | 4.41 | 4.44 | 3.81 | 4.40 | 13.2 °C |
| October | 5.64 | 4.24 | 3.59 | 4.95 | 16.2 °C |
| November | 6.91 | 3.87 | 3.22 | 5.41 | 19.4 °C |
| December | 7.53 | 3.59 | 2.95 | 5.52 | 22.3 °C |
| Year | 4.82 avg | 4.11 avg | 1268 kWh | 1603 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 400 Wp of panels at 70°, versus 410 Wp at 29°. The steep array is 1% smaller for the same winter. Size your own system.
Row spacing in San José de Mayo
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.
4.1 mrow pitch at 70°
3.5 mrow pitch at 29°
How San José de Mayo compares in Uruguay
Against the other 30 places in Uruguay with climate data, for a fixed array at its best angle.
5thof 31 places in Uruguay for sunshine, shared: 4.82 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Uruguay: 1,603 against 1,584 kWh per kWp.
−3 mindaylight on the longest day, compared with Montevideo: 14 h 27 min against 14 h 30 min.
29°best year-round tilt here; across Uruguay it runs from 26° in Artigas to 29° in Montevideo.
Of the 31 places in Uruguay, Artigas gets the most sun (4.86 peak sun hours a day) and Rocha the least (4.64); San José de Mayo ranks joint 5th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.95 kWh a day here, against 2.85 kWh on average in Uruguay. The shortest day lasts 9 h 51 min, +3 min compared with Montevideo.
Solar forecast for San José de Mayo, 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 San José de Mayo
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A free, live card for San José de Mayo: 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.