Tuesday, March 10th, 2026 · 21st Ramadan 1447H
Iftar Time Today
Iftar in Greeley, Colorado, MST/MDT, using NOAA algorithms
Sehri Ends
05:50
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 Greeley is based on the astronomical sunset at 40.4°N, 104.8°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 Greeley lasts 11h 38m, which is approximately 100 minutes longer than at the start of Ramadan. Fasting hours are increasing gradually as daylight lengthens in the spring season.
At 40.4°N and 1487m elevation in the Denver timezone, Greeley is in the temperate zone, where seasonal daylight changes are noticeable. During Ramadan in spring, fasting hours increase by about 5 minutes each day. Your elevation adds roughly 5.2 minutes to sunset timing.
By mid-Ramadan (day 15), you'll have gained an extra 75 minutes of fasting compared to the first day. Compared to Fort Collins at 40.5°N, this results in about 1 minutes of difference. These gradual daily changes are a defining feature of fasting in Greeley.
Greeley's sunset is approximately 1 minute earlier than Westminster, primarily due to longitude differences between the cities.
Greeley's sunset is approximately 2 minutes earlier than Arvada, primarily due to longitude differences between the cities.
Greeley's sunset is approximately 0 minutes earlier than Denver, primarily due to longitude differences between the cities.
In Greeley, sunset shifts slightly. Specifically, today's sunset occurs 1m later than yesterday.
Tomorrow's fast will be approximately 5 minutes longer than today in Greeley, following the seasonal daylight pattern at 40.4° latitude. This daily progression is characteristic of Greeley's temperate 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 1487m above sea level, Greeley'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 Greeley's exact location (40.42°N, 104.77°W), timezone (America/Denver), and the current season to determine accurate sunset times throughout Ramadan.
Iftar in Greeley today is the astronomical sunset time shown at the top of this page. Check the precise time, which is calculated for Greeley's exact location (40.42°N, 104.77°W) at 1487m elevation. The calculation uses the ISNA 15° method, which is standard across North America.
Sehri end time in Greeley 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 Greeley's exact coordinates using the ISNA 15° method, though you can compare other calculation standards on this page.
At 40.4°N, Greeley experiences moderate seasonal variation in daylight, affecting fasting duration throughout Ramadan. Fasting hours in Greeley vary daily throughout Ramadan as sunset and Fajr shift with the season. The times shown on this page are calculated for Greeley's exact location so you can plan your fast accordingly.
Compared to Fort Collins, Greeley has sunset 1 minute later than Fort Collins due to its more easterly position. The primary cause is the longitude difference between the cities — roughly 4 minutes of time difference per degree of longitude. Greeley is at latitude 40.42°, while Fort Collins is at latitude 40.55°. 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 Greeley. 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.