Tuesday, March 10th, 2026 · 21st Ramadan 1447H
Iftar Time Today
Iftar in Rancho Cucamonga, California, PST/PDT, using NOAA algorithms
Sehri Ends
05:46
When fasting begins today
MWL Method
Uses the Muslim World League standard (18° astronomical twilight), widely accepted globally.
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Check PriceIftar time in Rancho Cucamonga is based on the astronomical sunset at 34.1°N, 117.6°W. This timing already accounts for atmospheric refraction, marking the moment the sun appears to dip below the horizon.
Local Confirmation: While our Iftar times are accurate, we recommend checking with your local mosque for any community-specific adjustments or moon sighting variations.
Today's fast in Rancho Cucamonga lasts 11h 44m, which is approximately 60 minutes longer than at the start of Ramadan. Fasting hours are changing moderately as the season progresses.
At 34.1°N and 415m elevation in the Los_Angeles timezone, Rancho Cucamonga is in the temperate zone, where seasonal daylight changes are noticeable. During Ramadan in spring, fasting hours increase by about 3 minutes each day. Your elevation adds roughly 1.5 minutes to sunset timing.
By mid-Ramadan (day 15), you'll have gained an extra 45 minutes of fasting compared to the first day. Compared to Ontario at 34.0°N, this results in about 0 minutes of difference. These gradual daily changes are a defining feature of fasting in Rancho Cucamonga.
Rancho Cucamonga's sunset is approximately 1 minute later than San Bernardino, primarily due to longitude differences between the cities.
Rancho Cucamonga's sunset is approximately 1 minute later than Riverside, primarily due to longitude differences between the cities.
Rancho Cucamonga's sunset is approximately 0 minutes earlier than Corona, primarily due to longitude differences between the cities.
In Rancho Cucamonga, sunset shifts slightly. Specifically, today's sunset occurs 1m later than yesterday.
Tomorrow's fast will be approximately 3 minutes longer than today in Rancho Cucamonga, following the seasonal daylight pattern at 34.1° latitude. This daily progression is characteristic of Rancho Cucamonga's subtropical latitude position, where seasonal astronomical shifts directly affect fasting duration throughout Ramadan.
Earth's atmosphere bends light, causing the sun to appear slightly higher on the horizon than its actual position. This atmospheric refraction effect is already accounted for in our calculations, giving you the precise moment when the sun appears to cross below the horizon.
At 415m above sea level, Rancho Cucamonga's elevation affects when sunset occurs. Higher elevations see the sunset slightly later than lower areas. This elevation adjustment is included in all our calculations.
Iftar times are calculated using precise astronomical algorithms from NOAA, based on Rancho Cucamonga's exact location (34.12°N, 117.57°W), timezone (America/Los_Angeles), and the current season to determine accurate sunset times throughout Ramadan.
Iftar in Rancho Cucamonga today is the astronomical sunset time shown at the top of this page. Check the precise time, which is calculated for Rancho Cucamonga's exact location (34.12°N, 117.57°W) at 415m elevation. The calculation uses the ISNA 15° method, which is standard across North America.
Sehri end time in Rancho Cucamonga marks when the fast begins in the morning. During Ramadan, this time shifts daily as sunrise moves earlier or later. The time shown on this page is calculated for Rancho Cucamonga's exact coordinates using the ISNA 15° method, though you can compare other calculation standards on this page.
At 34.1°N, Rancho Cucamonga experiences moderate seasonal variation in daylight, affecting fasting duration throughout Ramadan. Fasting hours in Rancho Cucamonga vary daily throughout Ramadan as sunset and Fajr shift with the season. The times shown on this page are calculated for Rancho Cucamonga's exact location so you can plan your fast accordingly.
Compared to Ontario, Rancho Cucamonga has sunset 148m higher elevation creates a slightly later sunset. The primary cause is the longitude difference between the cities — roughly 4 minutes of time difference per degree of longitude. Rancho Cucamonga is at latitude 34.12°, while Ontario is at latitude 34.04°. Even small differences in latitude and elevation create measurable shifts in when sunset occurs.
The ISNA 15° method is most commonly used by mosques in Rancho Cucamonga. However, the best method for you depends on your local mosque or Islamic authority. We provide multiple standards on this page: ISNA 15°, ISNA 15°, Umm al-Qura 18.5°, and Diyanet 20°. Check with your mosque to confirm which they recommend, then use that method from the options available above.