Located in Montgomery County, Pennsylvania, Arboretum of the Barnes Foundation is a botanical garden. The nearest town is Overbrook, about 1.0 km (0.6 mi) away (Arboretum of the Barnes Foundation lies N of town).
The Barnes Arboretum at Saint Joseph’s University, previously known as The Arboretum of the Barnes Foundation, 12 acres (4.9 ha) is an arboretum and the former site of the Barnes Foundation art gallery located at 300 North Latch's Lane, Merion, Pennsylvania, with entrance at 50 Lapsley Lane. Since 2018 the adjacent Saint Joseph's University has managed the arboretum and its educational programs under a lease agreement with the foundation. Now known as the Barnes Arboretum at Saint Joseph's University, the arboretum is open to visitors Monday through Friday when the university is open, but for walk-in visitors only. The Barnes Arboretum is open to the public every Monday to Friday 830 AM - 530 PM and 1100 AM - 530 PM on Saturday and Sunday except when the University is closed. No reservations or tickets are required to enjoy the grounds.From the Wikipedia article “Barnes Arboretum at Saint Joseph's University”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Arboretum of the Barnes Foundation 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 302° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 73° in summer but only 27° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:05 AM | 90° E | 7:13 PM | 271° W | 50° | 12h 08m |
| June solstice (Jun 21) | 5:33 AM | 58° ENE | 8:34 PM | 302° WNW | 73° | 15h 01m |
| September equinox (Sep 22) | 6:49 AM | 89° E | 7:00 PM | 271° W | 50° | 12h 11m |
| December solstice (Dec 21) | 7:20 AM | 121° ESE | 4:40 PM | 240° WSW | 27° | 9h 19m |
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 | 6:52 AM | 7:22 AM | 8:03 AM | 4:19 PM | 5:00 PM | 5:30 PM | 9h 39m |
| February | 6:27 AM | 6:55 AM | 7:33 AM | 4:59 PM | 5:37 PM | 6:05 PM | 10h 42m |
| March | 6:47 AM | 7:14 AM | 7:49 AM | 6:32 PM | 7:08 PM | 7:35 PM | 11h 55m |
| April | 5:56 AM | 6:24 AM | 7:00 AM | 7:03 PM | 7:39 PM | 8:07 PM | 13h 16m |
| May | 5:16 AM | 5:47 AM | 6:25 AM | 7:31 PM | 8:10 PM | 8:40 PM | 14h 23m |
| June | 5:00 AM | 5:32 AM | 6:13 AM | 7:51 PM | 8:32 PM | 9:05 PM | 15h 00m |
| July | 5:13 AM | 5:45 AM | 6:25 AM | 7:50 PM | 8:30 PM | 9:02 PM | 14h 44m |
| August | 5:44 AM | 6:13 AM | 6:51 AM | 7:22 PM | 7:59 PM | 8:28 PM | 13h 46m |
| September | 6:15 AM | 6:43 AM | 7:18 AM | 6:36 PM | 7:12 PM | 7:39 PM | 12h 29m |
| October | 6:45 AM | 7:12 AM | 7:49 AM | 5:46 PM | 6:23 PM | 6:50 PM | 11h 11m |
| November | 6:18 AM | 6:47 AM | 7:27 AM | 4:06 PM | 4:46 PM | 5:15 PM | 9h 59m |
| December | 6:46 AM | 7:17 AM | 7:59 AM | 3:54 PM | 4:37 PM | 5:08 PM | 9h 21m |
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 Arboretum of the Barnes Foundation, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.8 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 9 (inner-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 | — | -3° | — |
| February | 5:08 AM – 5:18 AM | 0.2 | 11° | SE → SE |
| March | 4:18 AM – 5:38 AM | 1.3 | 18° | SE → SSE |
| April | 2:16 AM – 4:36 AM | 2.3 | 21° | SE → S |
| May | 12:20 AM – 3:50 AM | 3.5 | 21° | SE → S |
| June | 10:35 PM – 3:25 AM | 4.8 | 21° | SE → SSW |
| July | 10:27 PM – 1:57 AM | 3.5 | 21° | S → SW |
| August | 9:41 PM – 12:01 AM | 2.3 | 21° | S → SW |
| September | 8:44 PM – 9:54 PM | 1.2 | 18° | SSW → SW |
| October | 7:53 PM – 8:03 PM | 0.2 | 11° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| 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: 9 Bortle 9 — Inner-city sky. Only the Moon, planets and a few bright stars are visible. Modeled zenith brightness ≈ 17.86 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 50% average cloud cover) and December as the cloudiest (63%). 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 | 72 | 77 | 91 | 90 | 97 | 102 | 100 | 96 | 95 | 76 | 70 |
| Low °F | 0 | -1 | -3 | 25 | 35 | 46 | 55 | 54 | 43 | 30 | 21 | 10 |
| Precip. (in) | 2.9 | 3.1 | 3.6 | 3.7 | 3.7 | 4.8 | 4.5 | 4.4 | 4.2 | 4.2 | 3.5 | 3.9 |
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
- 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.
- 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.
- Scout in daylight if you plan to shoot at night or before sunrise.
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 Arboretum of the Barnes Foundation, closest first.
Botanical Garden
Botanical Garden
Waterfall
Botanical Garden
Lighthouse
Lake
Covered Bridge
Botanical Garden
Covered BridgeFAQ
When is the best time to photograph Arboretum of the Barnes Foundation?
What time is golden hour at Arboretum of the Barnes Foundation?
Where does the sun rise and set at Arboretum of the Barnes Foundation?
Can you see the Milky Way from Arboretum of the Barnes Foundation?
Do you need a permit to photograph at Arboretum of the Barnes Foundation?
How far is Arboretum of the Barnes Foundation from Overbrook?
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.