Ontario · Canada · 45.89° N · 77.28° W
Solar position in Petawawa
Sun position, daylight and the best solar panel angle for Petawawa — computed for 45.89° N, 77.28° W, 143 m above sea level.
The sun right now
Sun in Petawawa today
Saturday, 24 October 2026 · local time UTC−4
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:58 | sun 18° below horizon |
| Nautical dawn | 06:32 | 12° below |
| Civil dawn | 07:07 | 6° below |
| Sunrise | 07:38 | 106° ESE |
| Golden hour ends | 08:20 | sun 6° up |
| Solar noon | 12:53 | 32.2° high |
| Golden hour starts | 17:25 | sun 6° up |
| Sunset | 18:07 | 254° WSW |
| Civil dusk | 18:38 | 6° below |
| Nautical dusk | 19:12 | 12° below |
| Astronomical dusk | 19:47 | 18° below |
| Day length | 10 h 29 min | |
Sun path diagram for Petawawa
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 67.5° at solar noon in Petawawa; on the December solstice only 20.7°. Sunrise swings from 54° NE in June to 124° SE in December — a 70° 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 | 07:42 | 12:20 | 16:59 | 9 h 17 min | 24.4° |
| February | 07:01 | 12:22 | 17:44 | 10 h 43 min | 33.8° |
| March | 07:10 | 13:16 | 19:23 | 12 h 13 min | 44.6° |
| April | 06:12 | 13:07 | 20:03 | 13 h 52 min | 56.1° |
| May | 05:30 | 13:05 | 20:41 | 15 h 10 min | 64.4° |
| June | 05:18 | 13:10 | 21:03 | 15 h 44 min | 67.5° |
| July | 05:39 | 13:15 | 20:50 | 15 h 11 min | 64.5° |
| August | 06:16 | 13:12 | 20:07 | 13 h 51 min | 56.1° |
| September | 06:54 | 13:01 | 19:08 | 12 h 14 min | 44.6° |
| October | 07:34 | 12:53 | 18:12 | 10 h 38 min | 33.3° |
| November | 07:17 | 11:54 | 16:32 | 9 h 14 min | 24.1° |
| December | 07:47 | 12:07 | 16:26 | 8 h 39 min | 20.7° |
A year of daylight in Petawawa
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 Petawawa
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
39°collects the most energy over a year: 1306 kWh per kWp.
74°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° | 1075 | 82% | 0.81 | 5.9× |
| 15° | 1217 | 93% | 1.19 | 4.1× |
| 30° | 1294 | 99% | 1.51 | 3.2× |
| 39° year-round best | 1306 | 100% | 1.67 | 2.7× |
| 45° | 1300 | 100% | 1.76 | 2.6× |
| 46° = latitude | 1298 | 99% | 1.77 | 2.6× |
| 60° | 1235 | 95% | 1.91 | 2.4× |
| 70° | 1156 | 88% | 1.95 | 2.3× |
| 74° off-grid best | 1116 | 85% | 1.95 | 2.3× |
| 90° | 921 | 71% | 1.89 | 2.1× |
A fixed array in Petawawa produces the most over a year at 39°. The design month for an off-grid system is December: at 74° it makes 1.95 kWh per kWp a day, 17% more than at 39°, and costs 15% of the yearly total. Why steep panels win winter.
Off-grid solar in Petawawa at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 39° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 39° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.37 | 2.82 | 2.65 | 2.30 | -12.1 °C |
| February snow | 2.30 | 3.86 | 3.63 | 3.34 | -11.1 °C |
| March snow | 3.63 | 4.89 | 4.49 | 4.47 | -4.8 °C |
| April | 4.59 | 4.11 | 3.65 | 4.44 | 3.8 °C |
| May | 5.31 | 3.80 | 3.26 | 4.43 | 11.5 °C |
| June | 5.85 | 3.75 | 3.15 | 4.52 | 16.8 °C |
| July | 5.86 | 3.93 | 3.27 | 4.58 | 19.8 °C |
| August | 5.01 | 4.07 | 3.41 | 4.35 | 18.8 °C |
| September | 3.85 | 4.17 | 3.55 | 3.99 | 14.8 °C |
| October | 2.28 | 3.15 | 2.76 | 2.79 | 7.2 °C |
| November snow | 1.37 | 2.53 | 2.28 | 2.06 | 0.1 °C |
| December snow | 1.00 | 2.11 | 1.95 | 1.67 | -7.8 °C |
| Year | 3.54 avg | 3.60 avg | 1156 kWh | 1306 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 610 Wp of panels at 70°, versus 710 Wp at 39°. The steep array is 14% smaller for the same winter. Size your own system.
Row spacing in Petawawa
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.
6.6 mrow pitch at 70°
5.5 mrow pitch at 39°
How Petawawa compares in Canada
Against the other 295 places in Canada with climate data, for a fixed array at its best angle.
146thof 296 places in Canada for sunshine, shared: 3.54 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Canada: 1,306 against 1,292 kWh per kWp.
+17 mindaylight on the longest day, compared with Toronto: 15 h 44 min against 15 h 27 min.
39°best year-round tilt here; across Canada it runs from 34° in Hamilton to 52° in Yellowknife.
Of the 296 places in Canada, Medicine Hat and one other place get the most sun (3.84 peak sun hours a day) and Terrace the least (2.57); Petawawa ranks joint 146th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.95 kWh a day here, against 1.88 kWh on average in Canada. The shortest day lasts 8 h 39 min, −16 min compared with Toronto.
Solar forecast for Petawawa, 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 Petawawa
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Places near Petawawa
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A free, live card for Petawawa: 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.