Solarposition.org

Quebec · Canada · 45.70° N · 73.79° W

Solar position in Saint-Louis-de-Terrebonne

Sun position, daylight and the best solar panel angle for Saint-Louis-de-Terrebonne — computed for 45.70° N, 73.79° W, 64 m above sea level.

Sunrise today07:24106° ESE
Sunset today17:53254° WSW
Best panel angle39°year-round, facing south
Off-grid angle74°best for the darkest month

The sun right now

Azimuth180.0°
Elevation32.4°
At solar noon, 12:39Open on the sun map

Sun in Saint-Louis-de-Terrebonne today

Saturday, 24 October 2026 · local time UTC−4

EventTimeDirection / height
Astronomical dawn05:44sun 18° below horizon
Nautical dawn06:1812° below
Civil dawn06:536° below
Sunrise07:24106° ESE
Golden hour ends08:05sun 6° up
Solar noon12:3932.4° high
Golden hour starts17:12sun 6° up
Sunset17:53254° WSW
Civil dusk18:246° below
Nautical dusk18:5912° below
Astronomical dusk19:3318° below
Day length10 h 30 min

Sun path diagram for Saint-Louis-de-Terrebonne

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 solstice67891011121314151617181920EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 67.7° at solar noon in Saint-Louis-de-Terrebonne; on the December solstice only 20.9°. Sunrise swings from 54° NE in June to 124° ESE in December — a 69° 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
January07:2712:0616:459 h 18 min24.5°
February06:4712:0817:3010 h 43 min33.9°
March06:5613:0219:0912 h 13 min44.7°
April05:5812:5319:4913 h 51 min56.3°
May05:1712:5120:2615 h 09 min64.6°
June05:0512:5720:4815 h 43 min67.7°
July05:2613:0120:3615 h 10 min64.7°
August06:0212:5819:5213 h 50 min56.2°
September06:4112:4718:5412 h 13 min44.8°
October07:1912:3917:5810 h 39 min33.5°
November07:0311:4016:189 h 16 min24.3°
December07:3211:5316:138 h 41 min20.9°

A year of daylight in Saint-Louis-de-Terrebonne

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 Saint-Louis-de-Terrebonne

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.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 39°Best worst-month 74°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°107282%0.835.7×
15°121693%1.233.9×
30°129499%1.563.0×
39° year-round best1306100%1.732.6×
45°1301100%1.822.5×
46° = latitude129999%1.832.4×
60°123795%1.972.3×
70°115789%2.022.2×
74° off-grid best111886%2.022.1×
90°92371%1.962.0×

A fixed array in Saint-Louis-de-Terrebonne produces the most over a year at 39°. The design month for an off-grid system is December: at 74° it makes 2.02 kWh per kWp a day, 17% more than at 39°, and costs 14% of the yearly total. Why steep panels win winter.

Off-grid solar in Saint-Louis-de-Terrebonne at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 39° (year-round best).

012345January: 2.80 (70°)2.8JanFebruary: 3.69 (70°)3.7FebMarch: 4.41 (70°)4.4MarApril: 3.53 (70°)3.5AprMay: 3.22 (70°)3.2MayJune: 3.08 (70°)3.1JunJuly: 3.20 (70°)3.2JulAugust: 3.41 (70°)3.4AugSeptember: 3.62 (70°)3.6SepOctober: 2.81 (70°)2.8OctNovember: 2.30 (70°)2.3NovDecember: 2.02 (70°)2.0Dec39°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 39°Mean temp.
January snow1.442.982.802.43-11.7 °C
February snow2.373.943.693.41-10.1 °C
March snow3.584.814.414.39-4.1 °C
April4.483.993.534.314.5 °C
May5.283.773.224.3812.4 °C
June5.763.683.084.4317.7 °C
July5.773.873.204.4920.7 °C
August5.054.093.414.3619.9 °C
September3.934.263.624.0715.8 °C
October2.323.212.812.848.0 °C
November1.432.572.302.130.8 °C
December snow1.032.192.021.73-7.1 °C
Year3.54 avg3.61 avg1157 kWh1306 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 580 Wp of panels at 70°, versus 680 Wp at 39°. The steep array is 14% smaller for the same winter. Size your own system.

Row spacing in Saint-Louis-de-Terrebonne

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°

Row spacing calculator

How Saint-Louis-de-Terrebonne 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.

+16 mindaylight on the longest day, compared with Toronto: 15 h 43 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); Saint-Louis-de-Terrebonne ranks joint 146th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.02 kWh a day here, against 1.88 kWh on average in Canada. The shortest day lasts 8 h 41 min, −15 min compared with Toronto.

The sunniest places in Canada

Solar forecast for Saint-Louis-de-Terrebonne, 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 Saint-Louis-de-Terrebonne

What is the best solar panel angle in Saint-Louis-de-Terrebonne?
For a fixed array facing south, the best year-round tilt in Saint-Louis-de-Terrebonne is 39°, worth about 1306 kWh per kWp a year. An off-grid system that has to get through December does better at about 74°.
What time is sunrise and sunset in Saint-Louis-de-Terrebonne today?
On 24 October 2026 the sun rises at 07:24 and sets at 17:53 local time (UTC−4), giving 10 h 30 min of daylight. Solar noon is at 12:39.
How many peak sun hours does Saint-Louis-de-Terrebonne get?
On a flat surface 3.5 hours a day averaged over the year, from 1.0 in December to 5.8 in July. Panels tilted at 70° receive 2.2 sun hours a day in December.
How high does the sun get in Saint-Louis-de-Terrebonne?
At solar noon the sun stands 67.7° above the horizon on the June solstice and 20.9° on the December solstice.
Is Saint-Louis-de-Terrebonne a good place for solar panels?
With 3.5 peak sun hours a day on flat ground, Saint-Louis-de-Terrebonne ranks joint 146th of 296 places in Canada for sunshine. A 1 kWp array at the best angle (39°) makes about 1,306 kWh a year here, 1% more than the average place in Canada.

Places near Saint-Louis-de-Terrebonne

All places in Canada

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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.