Solarposition.org

Ohio · United States · 40.39° N · 82.49° W

Solar position in Mount Vernon

Sun position, daylight and the best solar panel angle for Mount Vernon — computed for 40.39° N, 82.49° W, 305 m above sea level.

Sunrise today07:50105° ESE
Sunset today18:36255° WSW
Best panel angle33°year-round, facing south
Off-grid angle65°best for the darkest month

The sun right now

Azimuth180.0°
Elevation37.7°
At solar noon, 13:13Open on the sun map

Sun in Mount Vernon today

Saturday, 24 October 2026 · local time UTC−4

EventTimeDirection / height
Astronomical dawn06:19sun 18° below horizon
Nautical dawn06:5112° below
Civil dawn07:226° below
Sunrise07:50105° ESE
Golden hour ends08:28sun 6° up
Solar noon13:1337.7° high
Golden hour starts17:59sun 6° up
Sunset18:36255° WSW
Civil dusk19:046° below
Nautical dusk19:3612° below
Astronomical dusk20:0818° below
Day length10 h 46 min

Sun path diagram for Mount Vernon

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice7891011121314151617181920EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 73.0° at solar noon in Mount Vernon; on the December solstice only 26.2°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January07:4712:4117:359 h 47 min29.9°
February07:1512:4318:1210 h 57 min39.3°
March07:3113:3719:4312 h 12 min50.1°
April06:4213:2820:1513 h 33 min61.7°
May06:0813:2620:4514 h 37 min69.9°
June06:0013:3121:0315 h 04 min73.0°
July06:1713:3620:5414 h 37 min70.0°
August06:4613:3220:1813 h 32 min61.5°
September07:1613:2219:2812 h 12 min50.1°
October07:4713:1418:4110 h 54 min38.7°
November07:2312:1517:089 h 45 min29.6°
December07:4912:2817:069 h 17 min26.2°

A year of daylight in Mount Vernon

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Mount Vernon

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: 1331 kWh per kWp.

65°gives the most in the darkest month — the one an off-grid system is sized for.

50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 33°Best worst-month 65°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°115887%1.124.4×
15°128096%1.513.3×
30°1330100%1.832.6×
33° year-round best1331100%1.882.5×
40° = latitude132299%1.982.2×
45°130698%2.042.1×
60°121091%2.141.9×
65° off-grid best116387%2.151.8×
70°111083%2.141.7×
90°84063%1.981.6×

A fixed array in Mount Vernon produces the most over a year at 33°. The design month for an off-grid system is December: at 65° it makes 2.15 kWh per kWp a day, 14% more than at 33°, and costs 13% of the yearly total. Why steep panels win winter.

Off-grid solar in Mount Vernon at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 33° (year-round best).

012345January: 2.48 (70°)2.5JanFebruary: 3.03 (70°)3.0FebMarch: 3.22 (70°)3.2MarApril: 3.32 (70°)3.3AprMay: 3.06 (70°)3.1MayJune: 2.94 (70°)2.9JunJuly: 3.03 (70°)3.0JulAugust: 3.33 (70°)3.3AugSeptember: 3.66 (70°)3.7SepOctober: 3.33 (70°)3.3OctNovember: 2.97 (70°)3.0NovDecember: 2.14 (70°)2.1Dec33°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 33°Mean temp.
January snow1.612.732.482.16-2.8 °C
February snow2.453.343.032.95-1.7 °C
March3.453.633.223.623.5 °C
April4.733.843.324.3110.2 °C
May5.543.623.064.4916.1 °C
June6.123.562.944.6420.9 °C
July6.083.693.034.6623.3 °C
August5.494.043.334.5822.9 °C
September4.454.373.664.3019.1 °C
October3.003.853.333.4111.9 °C
November2.053.362.972.745.1 °C
December snow1.372.382.141.88-0.2 °C
Year3.87 avg3.53 avg1110 kWh1331 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 550 Wp of panels at 70°, versus 630 Wp at 33°. The steep array is 12% smaller for the same winter. Size your own system.

Row spacing in Mount Vernon

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°

4.2 mrow pitch at 33°

Row spacing calculator

How Mount Vernon 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.

2340thof 3,121 places in the United States for sunshine, shared: 3.87 peak sun hours a day on flat ground.

−12%solar energy a year compared with the average place in the United States: 1,331 against 1,515 kWh per kWp.

−2 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); Mount Vernon ranks joint 2340th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.14 kWh a day here, against 2.55 kWh on average in the United States. The shortest day lasts 9 h 17 min, +2 min compared with New York City.

The sunniest places in the United States

Solar forecast for Mount Vernon, 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 Mount Vernon

What is the best solar panel angle in Mount Vernon?
For a fixed array facing south, the best year-round tilt in Mount Vernon is 33°, worth about 1331 kWh per kWp a year. An off-grid system that has to get through December does better at about 65°.
What time is sunrise and sunset in Mount Vernon today?
On 24 October 2026 the sun rises at 07:50 and sets at 18:36 local time (UTC−4), giving 10 h 46 min of daylight. Solar noon is at 13:13.
How many peak sun hours does Mount Vernon get?
On a flat surface 3.9 hours a day averaged over the year, from 1.4 in December to 6.1 in June. Panels tilted at 70° receive 2.4 sun hours a day in December.
How high does the sun get in Mount Vernon?
At solar noon the sun stands 73.0° above the horizon on the June solstice and 26.2° on the December solstice.
Is Mount Vernon a good place for solar panels?
With 3.9 peak sun hours a day on flat ground, Mount Vernon ranks joint 2340th of 3,121 places in the United States for sunshine. A 1 kWp array at the best angle (33°) makes about 1,331 kWh a year here, 12% less than the average place in the United States.

Places near Mount Vernon

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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.