Located in Somerset County, New Jersey, Duke Gardens is a botanical garden. The nearest town is Raritan, about 2.4 km (1.5 mi) away (Duke Gardens lies SSE of town).
Duke Gardens in Somerset County, New Jersey, were among the most significant glass house collections in America. Created by Doris Duke, they were larger than the New York Botanical Garden's Enid A. Haupt Conservatory, and were open to the public from 1964. They were closed by the Doris Duke Charitable Foundation on or before May 25, 2008, and the plant material was donated to public gardens throughout the United States. After the restructuring, parts of the garden remained onsite as part of the Duke Farms, which allows access to over 1,000 acres to visitors and researchers.From the Wikipedia article “Duke Gardens (New Jersey)”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Duke Gardens the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 121° (ESE) in late December. Sunset moves from 303° (WNW) in June to 239° (WSW) in December, and the midday sun climbs to 73° in summer but only 26° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:03 AM | 90° E | 7:11 PM | 271° W | 49° | 12h 08m |
| June solstice (Jun 21) | 5:29 AM | 58° ENE | 8:33 PM | 303° WNW | 73° | 15h 05m |
| September equinox (Sep 22) | 6:47 AM | 89° E | 6:57 PM | 271° W | 50° | 12h 11m |
| December solstice (Dec 21) | 7:19 AM | 121° ESE | 4:35 PM | 239° WSW | 26° | 9h 16m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Gardens are best on bright overcast days or early mornings when dew is fresh and the wind is calm.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:51 AM | 7:21 AM | 8:03 AM | 4:14 PM | 4:56 PM | 5:26 PM | 9h 36m |
| February | 6:25 AM | 6:53 AM | 7:31 AM | 4:56 PM | 5:34 PM | 6:02 PM | 10h 41m |
| March | 6:44 AM | 7:11 AM | 7:47 AM | 6:29 PM | 7:05 PM | 7:33 PM | 11h 54m |
| April | 5:52 AM | 6:21 AM | 6:57 AM | 7:01 PM | 7:38 PM | 8:06 PM | 13h 17m |
| May | 5:12 AM | 5:43 AM | 6:22 AM | 7:30 PM | 8:09 PM | 8:40 PM | 14h 26m |
| June | 4:55 AM | 5:28 AM | 6:09 AM | 7:50 PM | 8:31 PM | 9:05 PM | 15h 03m |
| July | 5:09 AM | 5:41 AM | 6:21 AM | 7:49 PM | 8:29 PM | 9:01 PM | 14h 48m |
| August | 5:41 AM | 6:10 AM | 6:47 AM | 7:20 PM | 7:58 PM | 8:27 PM | 13h 48m |
| September | 6:13 AM | 6:40 AM | 7:16 AM | 6:33 PM | 7:09 PM | 7:37 PM | 12h 29m |
| October | 6:42 AM | 7:10 AM | 7:47 AM | 5:43 PM | 6:20 PM | 6:47 PM | 11h 10m |
| November | 6:16 AM | 6:46 AM | 7:26 AM | 4:02 PM | 4:42 PM | 5:12 PM | 9h 57m |
| December | 6:45 AM | 7:16 AM | 7:59 AM | 3:50 PM | 4:33 PM | 5:04 PM | 9h 18m |
Local time (America/New York), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Duke Gardens, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.7 hours on a moonless night), and the core peaks around 21° above the southern horizon. Our light-pollution model puts the sky at about Bortle 8 (city sky), so expect visible sky glow; drive away from towns for better results.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -2° | — |
| February | 5:15 AM – 5:15 AM | 0.0 | 11° | SE → SE |
| March | 4:26 AM – 5:36 AM | 1.2 | 17° | SE → SSE |
| April | 2:25 AM – 4:35 AM | 2.2 | 20° | SE → S |
| May | 12:20 AM – 3:40 AM | 3.3 | 21° | SE → S |
| June | 10:36 PM – 3:16 AM | 4.7 | 21° | SSE → SSW |
| July | 10:27 PM – 1:57 AM | 3.5 | 21° | S → SW |
| August | 9:40 PM – 11:50 PM | 2.2 | 20° | S → SW |
| September | 8:42 PM – 9:52 PM | 1.2 | 17° | SSW → SW |
| October | 7:50 PM – 7:50 PM | 0.0 | 11° | SW → SW |
| November | Below 10° in darkness | — | -1° | — |
| December | Below 10° in darkness | — | -19° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 8 Bortle 8 — City sky. Only bright constellations are visible; the sky glows orange or white. Modeled zenith brightness ≈ 18.34 mag/arcsec². Aurora needs roughly Kp 6.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 51% average cloud cover) and December as the cloudiest (64%). July is the warmest month and January the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 67 | 71 | 73 | 91 | 88 | 96 | 102 | 101 | 96 | 92 | 75 | 71 |
| Low °F | -2 | -3 | 0 | 24 | 33 | 44 | 52 | 53 | 43 | 28 | 14 | 6 |
| Precip. (in) | 3.1 | 3.4 | 3.9 | 3.9 | 3.8 | 4.7 | 4.5 | 4.4 | 3.8 | 4.4 | 3.6 | 4.4 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this botanical garden
- Seasonal exhibits (orchids, tulips, cherry blossoms) draw crowds — arrive at opening.
- Kaleidoscopic and abstract images are great for flower close-ups — try the online kaleidoscope tool.
- A macro lens or close-up filter opens a world of detail — try a shallow aperture against a soft background.
- Many gardens restrict tripods or charge for photography; check the rules before you go.
- Backlit petals glow; position yourself so the sun is behind the flower.
- Bring a spare battery — cold weather and long exposures drain them fast.
Season: Spring bulbs and blossoms, summer perennials and autumn color; glasshouses offer winter subjects.
Suggested gear: Macro lens, Diffuser, Small reflector. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Duke Gardens, closest first.
Botanical Garden
Waterfall
Mountain Peak
Botanical Garden
Ghost Town
State Park
Botanical Garden
Botanical Garden
State ParkFAQ
When is the best time to photograph Duke Gardens?
What time is golden hour at Duke Gardens?
Where does the sun rise and set at Duke Gardens?
Can you see the Milky Way from Duke Gardens?
Do you need a permit to photograph at Duke Gardens?
How far is Duke Gardens from Raritan?
Sources
Location data: Wikidata, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.