Sunrise and sunset in Alta Vista
The sun comes up at 6:46 am and goes down at 4:45 pm in Alta Vista today, 9 h 59 min of daylight. Drag the sun across the sky to see where it will be at any minute. Another city.
Alta Vista, Ontario, Canada
Wednesday, November 4
3:25 am the sun is night, 35 degrees below the horizon
ALTA VISTA 45.39 N 75.66 W DAY 9 H 59 MIN UTC-5
Today, hour by hour
- First light
- 5:05 am astronomical dawn
- Nautical dawn
- 5:39 am horizon becomes visible
- Dawn
- 6:15 am civil twilight begins
- Sunrise
- 6:46 am
- Golden hour
- 6:26 am to 7:29 am morning
- Solar noon
- 11:46 am sun 29 degrees up
- Golden hour
- 4:02 pm to 5:04 pm evening
- Sunset
- 4:45 pm
- Dusk
- 5:16 pm civil twilight ends
- Nautical dusk
- 5:51 pm
- Last light
- 6:26 pm astronomical dusk, full dark
- Day length
- 9 h 59 min −2 min 46 s vs yesterday
The next thirty days
| Day | Sunrise | Sunset | Day length | Change |
|---|---|---|---|---|
| Today | 6:46 am | 4:45 pm | 9 h 59 min | −2 min 46 s |
| Tomorrow | 6:47 am | 4:44 pm | 9 h 57 min | −2 min 44 s |
| Fri, Nov 6 | 6:48 am | 4:42 pm | 9 h 54 min | −2 min 42 s |
| Sat, Nov 7 | 6:50 am | 4:41 pm | 9 h 51 min | −2 min 41 s |
| Sun, Nov 8 | 6:51 am | 4:40 pm | 9 h 49 min | −2 min 39 s |
| Mon, Nov 9 | 6:53 am | 4:39 pm | 9 h 46 min | −2 min 37 s |
| Tue, Nov 10 | 6:54 am | 4:37 pm | 9 h 43 min | −2 min 35 s |
| Wed, Nov 11 | 6:55 am | 4:36 pm | 9 h 41 min | −2 min 33 s |
| Thu, Nov 12 | 6:57 am | 4:35 pm | 9 h 38 min | −2 min 31 s |
| Fri, Nov 13 | 6:58 am | 4:34 pm | 9 h 36 min | −2 min 29 s |
| Sat, Nov 14 | 7:00 am | 4:33 pm | 9 h 33 min | −2 min 27 s |
| Sun, Nov 15 | 7:01 am | 4:32 pm | 9 h 31 min | −2 min 24 s |
| Mon, Nov 16 | 7:02 am | 4:31 pm | 9 h 29 min | −2 min 22 s |
| Tue, Nov 17 | 7:04 am | 4:30 pm | 9 h 26 min | −2 min 19 s |
| Wed, Nov 18 | 7:05 am | 4:29 pm | 9 h 24 min | −2 min 17 s |
| Thu, Nov 19 | 7:06 am | 4:28 pm | 9 h 22 min | −2 min 14 s |
| Fri, Nov 20 | 7:08 am | 4:27 pm | 9 h 20 min | −2 min 11 s |
| Sat, Nov 21 | 7:09 am | 4:27 pm | 9 h 18 min | −2 min 08 s |
| Sun, Nov 22 | 7:10 am | 4:26 pm | 9 h 15 min | −2 min 05 s |
| Mon, Nov 23 | 7:12 am | 4:25 pm | 9 h 13 min | −2 min 02 s |
| Tue, Nov 24 | 7:13 am | 4:24 pm | 9 h 11 min | −1 min 59 s |
| Wed, Nov 25 | 7:14 am | 4:24 pm | 9 h 10 min | −1 min 56 s |
| Thu, Nov 26 | 7:15 am | 4:23 pm | 9 h 08 min | −1 min 52 s |
| Fri, Nov 27 | 7:17 am | 4:23 pm | 9 h 06 min | −1 min 49 s |
| Sat, Nov 28 | 7:18 am | 4:22 pm | 9 h 04 min | −1 min 45 s |
| Sun, Nov 29 | 7:19 am | 4:22 pm | 9 h 02 min | −1 min 42 s |
| Mon, Nov 30 | 7:20 am | 4:21 pm | 9 h 01 min | −1 min 38 s |
| Tue, Dec 1 | 7:22 am | 4:21 pm | 8 h 59 min | −1 min 34 s |
| Wed, Dec 2 | 7:23 am | 4:20 pm | 8 h 58 min | −1 min 30 s |
| Thu, Dec 3 | 7:24 am | 4:20 pm | 8 h 56 min | −1 min 26 s |
Reading the sky band
The band is one day in Alta Vista, midnight to midnight, in its own local time. The curve is the sun's height: above the line it is up, below it is not. The dark bands are the three twilights and night; the lighter stripe either side of sunrise and sunset is the golden hour, and the thin cool stripe after it is the blue hour. Drag the sun to any minute and the readout says how high it is and which way to look.
Dawn, sunrise, dusk and the three twilights
Sunrise and sunset are when the top edge of the sun meets a flat horizon, with refraction bending the light so it shows up a little early and lingers a little late (the sun's centre is 0.833 degrees below the horizon at that moment). Civil twilight is the sun within 6 degrees below: bright enough to work outside without lights. Nautical twilight runs to 12 degrees, when sailors could still see the horizon to shoot a star. Astronomical twilight runs to 18 degrees; after that the sky is as dark as it gets.
Why the times drift
Day length in Alta Vista changes fastest around the equinoxes in March and September and stalls at the solstices in June and December. The change column in the table is today against yesterday, so you can watch the evenings draw in or stretch out. Hills, buildings and haze at your actual horizon shift the real moment by a minute or several; these are the times for a flat, clear horizon at sea level.
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What stays here
Everything on this page is arithmetic on a latitude, a longitude and the clock, done once at the edge so the numbers are in the page before any script runs, and again in your browser as you drag the sun. No account, no cookies, nothing typed here is stored. The only thing this page records is that a city was looked up, and which one.