Pennsylvania · United States · 40.52° N · 78.39° W
Solar position in Altoona
Sun position, daylight and the best solar panel angle for Altoona — computed for 40.52° N, 78.39° W, 355 m above sea level.
The sun right now
Sun in Altoona today
Saturday, 24 October 2026 · local time UTC−4
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:03 | sun 18° below horizon |
| Nautical dawn | 06:34 | 12° below |
| Civil dawn | 07:06 | 6° below |
| Sunrise | 07:34 | 105° ESE |
| Golden hour ends | 08:12 | sun 6° up |
| Solar noon | 12:57 | 37.6° high |
| Golden hour starts | 17:42 | sun 6° up |
| Sunset | 18:20 | 255° WSW |
| Civil dusk | 18:48 | 6° below |
| Nautical dusk | 19:20 | 12° below |
| Astronomical dusk | 19:51 | 18° below |
| Day length | 10 h 46 min | |
Sun path diagram for Altoona
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 72.9° at solar noon in Altoona; on the December solstice only 26.1°. Sunrise swings from 58° ENE in June to 121° ESE in December — a 63° 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 | 07:31 | 12:25 | 17:18 | 9 h 47 min | 29.7° |
| February | 06:58 | 12:27 | 17:55 | 10 h 57 min | 39.1° |
| March | 07:15 | 13:20 | 19:26 | 12 h 12 min | 49.9° |
| April | 06:26 | 13:12 | 19:59 | 13 h 33 min | 61.5° |
| May | 05:51 | 13:10 | 20:29 | 14 h 37 min | 69.8° |
| June | 05:43 | 13:15 | 20:47 | 15 h 04 min | 72.9° |
| July | 06:00 | 13:19 | 20:38 | 14 h 38 min | 69.9° |
| August | 06:30 | 13:16 | 20:02 | 13 h 32 min | 61.4° |
| September | 07:00 | 13:06 | 19:12 | 12 h 12 min | 50.0° |
| October | 07:31 | 12:57 | 18:24 | 10 h 53 min | 38.6° |
| November | 07:06 | 11:59 | 16:51 | 9 h 45 min | 29.5° |
| December | 07:33 | 12:11 | 16:49 | 9 h 16 min | 26.1° |
A year of daylight in Altoona
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 Altoona
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
33°collects the most energy over a year: 1293 kWh per kWp.
65°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° | 1120 | 87% | 1.11 | 4.3× |
| 15° | 1239 | 96% | 1.50 | 3.2× |
| 30° | 1291 | 100% | 1.80 | 2.5× |
| 33° year-round best | 1293 | 100% | 1.85 | 2.4× |
| 41° = latitude | 1283 | 99% | 1.97 | 2.2× |
| 45° | 1271 | 98% | 2.01 | 2.0× |
| 60° | 1183 | 91% | 2.11 | 1.8× |
| 65° off-grid best | 1139 | 88% | 2.12 | 1.7× |
| 70° | 1088 | 84% | 2.11 | 1.6× |
| 90° | 833 | 64% | 1.95 | 1.7× |
A fixed array in Altoona produces the most over a year at 33°. The design month for an off-grid system is December: at 65° it makes 2.12 kWh per kWp a day, 14% more than at 33°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Altoona at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 33° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 33° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.65 | 2.85 | 2.60 | 2.25 | -3.6 °C |
| February snow | 2.47 | 3.59 | 3.27 | 3.04 | -2.7 °C |
| March | 3.45 | 3.64 | 3.25 | 3.64 | 2.3 °C |
| April | 4.61 | 3.74 | 3.25 | 4.21 | 8.9 °C |
| May | 5.22 | 3.43 | 2.90 | 4.24 | 15.0 °C |
| June | 5.83 | 3.44 | 2.85 | 4.46 | 19.7 °C |
| July | 5.85 | 3.58 | 2.94 | 4.50 | 22.4 °C |
| August | 5.17 | 3.82 | 3.16 | 4.32 | 21.8 °C |
| September | 4.18 | 4.09 | 3.44 | 4.04 | 18.0 °C |
| October | 2.86 | 3.63 | 3.14 | 3.23 | 10.8 °C |
| November | 2.01 | 3.28 | 2.91 | 2.68 | 4.4 °C |
| December snow | 1.36 | 2.34 | 2.11 | 1.85 | -1.0 °C |
| Year | 3.73 avg | 3.45 avg | 1088 kWh | 1293 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 560 Wp of panels at 70°, versus 640 Wp at 33°. The steep array is 12% smaller for the same winter. Size your own system.
Row spacing in Altoona
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.
5.1 mrow pitch at 70°
4.3 mrow pitch at 33°
How Altoona 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.
2866thof 3,121 places in the United States for sunshine, shared: 3.73 peak sun hours a day on flat ground.
−15%solar energy a year compared with the average place in the United States: 1,293 against 1,515 kWh per kWp.
−1 mindaylight on the longest day, compared with New York City: 15 h 04 min against 15 h 06 min.
33°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); Altoona ranks joint 2866th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.11 kWh a day here, against 2.55 kWh on average in the United States. The shortest day lasts 9 h 16 min, +1 min compared with New York City.
Solar forecast for Altoona, 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 Altoona
What is the best solar panel angle in Altoona?
What time is sunrise and sunset in Altoona today?
How many peak sun hours does Altoona get?
How high does the sun get in Altoona?
Is Altoona a good place for solar panels?
Places near Altoona
Put this on your site
A free, live card for Altoona: 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.