Blue Hour in Rancho Cucamonga, CA

Rancho Cucamonga's blue hour by the numbers — August 8, 2026

For August 8, 2026, Rancho Cucamonga's evening blue hour falls between 8:03 PM – 8:11 PM, opening the moment the golden light gives out at 7:44 PM and closing at civil dusk (8:11 PM). Dawn shooters get the mirror image: a morning blue hour of 5:39 AM – 5:47 AM before sunrise at 6:06 AM.

The sequence to plan around is golden hour (7:09 PM – 8:03 PM) → sunset (7:44 PM, 290° WNW) → blue hour → dusk. At 34.1°N, with Rancho Cucamonga moving through summer and the days are drawing in, these windows shift by a minute or two daily, so re-check the planner before a shoot. All values update to any date you choose.

Shooting blue hour in Rancho Cucamonga: a field guide

Blue hour is the slice of twilight when the sun sits between about 6° and 4° below the horizon. Sunlight reaching the sky is scattered ozone-blue, shadows disappear, and the ambient level drops close to that of artificial lighting — which is why street lamps, windows and skylines photograph so well against a deep-blue sky. At Rancho Cucamonga’s latitude (34.1°N), each blue hour lasts roughly 20–35 minutes, so check the planner above and arrive set up before the window opens.

It behaves differently from golden hour: golden light is warm, directional and casts long shadows — great for portraits and texture — while blue hour is cool, even and shadowless, suited to Rancho Cucamonga's skyline and street scenes, long exposures and reflections. In the evening the order is golden hour → sunset → blue hour → dusk; mornings run in reverse, so blue hour comes first if you’re shooting dawn. See golden hour in Rancho Cucamonga and dusk / civil twilight in Rancho Cucamonga for the windows on either side, or the golden hour vs blue hour guide for the full comparison.

Camera settings that work here

• Tripod + remote or 2s timer. Exposures run 1–30 seconds once the sky deepens; hand-holding is over within minutes of sunset.
• Base ISO (100–400). Let the shutter stay open instead of raising ISO — blue hour rewards clean, long exposures.
• f/8–f/11 for front-to-back sharpness on Rancho Cucamonga's skyline and street scenes; open up toward f/4 only if you need to freeze motion.
• White balance 3800–4500K (or shoot RAW and decide later) — auto WB tends to neutralize exactly the blue you came for.
• Bracket ±1 EV. The sky-to-lights contrast in Rancho Cucamonga shifts fast through the roughly 20–35 minutes window; brackets keep highlights in the lamps and detail in the sky.

Rancho Cucamonga — frequently asked

When is blue hour today in Rancho Cucamonga?

Rancho Cucamonga has a morning blue hour ending around dawn and an evening blue hour beginning right after sunset. Today's exact windows are in the planner above.

Is blue hour before or after golden hour?

In the evening, golden hour comes first (ending at sunset), then blue hour. In the morning the order reverses: blue hour, then golden hour through sunrise.

Do I need a tripod for blue hour in Rancho Cucamonga?

Usually yes — blue hour light is dim, so longer exposures and a tripod help keep images sharp and noise-free.