Mercer Arboretum and Botanic Gardens is a botanical garden in Harris County, Texas. It sits roughly 5.8 km (3.6 mi) SE of Spring.
Mercer Botanic Gardens (180 acres) is a public botanical gardens that includes landscaped garden beds and natural areas located at 22306 Aldine Westfield Road in northern Harris County, Texas, United States. The gardens are managed by Harris County Precinct 3 and open daily with free admission. The mission of Mercer Botanic Gardens is to establish and maintain a versatile botanical facility for the greater Houston and Gulf Coast region that serves the public, horticultural industry, and scientific community.From the Wikipedia article “Mercer Botanic Gardens”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Mercer Arboretum and Botanic Gardens the sunrise point swings a long way through the year: about 62° (ENE) at the June solstice and 117° (ESE) in late December. Sunset moves from 298° (WNW) in June to 243° (WSW) in December, and the midday sun climbs to 83° in summer but only 37° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:26 AM | 90° E | 7:33 PM | 271° W | 60° | 12h 07m |
| June solstice (Jun 21) | 6:22 AM | 62° ENE | 8:26 PM | 298° WNW | 83° | 14h 05m |
| September equinox (Sep 22) | 7:11 AM | 89° E | 7:20 PM | 271° W | 60° | 12h 09m |
| December solstice (Dec 21) | 7:14 AM | 117° ESE | 5:27 PM | 243° WSW | 37° | 10h 12m |
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 | 6:53 AM | 7:19 AM | 7:54 AM | 5:09 PM | 5:44 PM | 6:10 PM | 10h 25m |
| February | 6:38 AM | 7:02 AM | 7:35 AM | 5:38 PM | 6:11 PM | 6:35 PM | 11h 08m |
| March | 7:08 AM | 7:32 AM | 8:04 AM | 6:59 PM | 7:30 PM | 7:54 PM | 11h 58m |
| April | 6:31 AM | 6:55 AM | 7:27 AM | 7:17 PM | 7:49 PM | 8:14 PM | 12h 54m |
| May | 6:03 AM | 6:29 AM | 7:03 AM | 7:35 PM | 8:09 PM | 8:35 PM | 13h 40m |
| June | 5:53 AM | 6:21 AM | 6:56 AM | 7:50 PM | 8:25 PM | 8:52 PM | 14h 04m |
| July | 6:04 AM | 6:31 AM | 7:06 AM | 7:51 PM | 8:25 PM | 8:52 PM | 13h 54m |
| August | 6:25 AM | 6:50 AM | 7:22 AM | 7:31 PM | 8:04 PM | 8:29 PM | 13h 14m |
| September | 6:43 AM | 7:07 AM | 7:38 AM | 6:57 PM | 7:28 PM | 7:52 PM | 12h 22m |
| October | 7:00 AM | 7:24 AM | 7:56 AM | 6:20 PM | 6:52 PM | 7:16 PM | 11h 28m |
| November | 6:22 AM | 6:48 AM | 7:22 AM | 4:52 PM | 5:27 PM | 5:52 PM | 10h 39m |
| December | 6:44 AM | 7:11 AM | 7:47 AM | 4:48 PM | 5:24 PM | 5:51 PM | 10h 13m |
Local time (America/Chicago), 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 Mercer Arboretum and Botanic Gardens, the Milky Way core is visible in a dark sky from February through October. June gives the longest window (about 6.7 hours on a moonless night), and the core peaks around 31° above the southern horizon. Our light-pollution model puts the sky at about Bortle 6 (bright suburban 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 | 4:42 AM – 5:32 AM | 0.8 | 18° | SE → SE |
| March | 3:50 AM – 6:10 AM | 2.3 | 28° | SE → SSE |
| April | 1:53 AM – 5:23 AM | 3.5 | 31° | SE → S |
| May | 11:50 PM – 4:50 AM | 5.0 | 31° | SE → SSW |
| June | 10:02 PM – 4:42 AM | 6.7 | 31° | SE → SW |
| July | 9:59 PM – 3:19 AM | 5.3 | 31° | SSE → SW |
| August | 9:31 PM – 1:11 AM | 3.7 | 31° | S → SW |
| September | 8:49 PM – 11:09 PM | 2.3 | 28° | SSW → SW |
| October | 8:12 PM – 9:12 PM | 1.0 | 20° | SW → SW |
| November | Below 10° in darkness | — | 4° | — |
| December | Below 10° in darkness | — | -18° | — |
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: 6 Bortle 6 — Bright suburban sky. The Milky Way is only visible near the zenith; the sky glows grey-orange in photos. Modeled zenith brightness ≈ 19.28 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show October as the clearest month (about 39% average cloud cover) and February as the cloudiest (64%). August 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 | 79 | 86 | 90 | 97 | 102 | 107 | 107 | 108 | 106 | 97 | 89 | 83 |
| Low °F | 18 | 18 | 21 | 34 | 43 | 62 | 66 | 62 | 50 | 35 | 25 | 24 |
| Precip. (in) | 3.5 | 3.2 | 3.5 | 3.5 | 4.7 | 4.9 | 3.6 | 4.1 | 4.1 | 4.8 | 3.8 | 3.8 |
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
- 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.
- A macro lens or close-up filter opens a world of detail — try a shallow aperture against a soft background.
- Check road and trail conditions with the managing agency before you go.
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 Mercer Arboretum and Botanic Gardens, closest first.
FAQ
When is the best time to photograph Mercer Arboretum and Botanic Gardens?
What time is golden hour at Mercer Arboretum and Botanic Gardens?
Where does the sun rise and set at Mercer Arboretum and Botanic Gardens?
Can you see the Milky Way from Mercer Arboretum and Botanic Gardens?
Do you need a permit to photograph at Mercer Arboretum and Botanic Gardens?
How far is Mercer Arboretum and Botanic Gardens from Spring?
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.