What time does it get dark in Flagstaff, AZ?
In Flagstaff, sunset ranges from about 5:15 PM around December 5 to about 7:46 PM around June 28. The shortest day (December 22) has 9h 47m of daylight and the longest (June 21) has 14h 32m. Most of Arizona skips daylight saving time, so there is no sudden jump in November.
Working out today's sunset…
Sunset and last light in Flagstaff, month by month
Times for the 15th of each month in 2026, local time. "Start by" is the latest start for a 30 or 60 minute run, ride or walk that finishes by sunset. Last light is when civil twilight ends and it becomes too dark to see without a light.
| Month | Sunrise | Sunset | Last light | Daylight | 30-min start by | 60-min start by |
|---|---|---|---|---|---|---|
| January | 7:35 AM | 5:38 PM | 6:06 PM | 10h 03m | 5:08 PM | 4:38 PM |
| February | 7:14 AM | 6:10 PM | 6:36 PM | 10h 56m | 5:40 PM | 5:10 PM |
| March | 6:38 AM | 6:35 PM | 7:00 PM | 11h 56m | 6:05 PM | 5:35 PM |
| April | 5:55 AM | 6:59 PM | 7:26 PM | 13h 04m | 6:29 PM | 5:59 PM |
| May | 5:23 AM | 7:24 PM | 7:52 PM | 14h 01m | 6:54 PM | 6:24 PM |
| June | 5:12 AM | 7:43 PM | 8:13 PM | 14h 31m | 7:13 PM | 6:43 PM |
| July | 5:24 AM | 7:42 PM | 8:11 PM | 14h 18m | 7:12 PM | 6:42 PM |
| August | 5:47 AM | 7:17 PM | 7:44 PM | 13h 30m | 6:47 PM | 6:17 PM |
| September | 6:10 AM | 6:35 PM | 7:01 PM | 12h 25m | 6:05 PM | 5:35 PM |
| October | 6:33 AM | 5:53 PM | 6:18 PM | 11h 19m | 5:23 PM | 4:53 PM |
| November | 7:02 AM | 5:22 PM | 5:49 PM | 10h 19m | 4:52 PM | 4:22 PM |
| December | 7:29 AM | 5:17 PM | 5:45 PM | 9h 48m | 4:47 PM | 4:17 PM |
Heading out near dark in Flagstaff
From late fall through winter it is dark in Flagstaff before 6 p.m., so after-work runs and walks happen in the dark for months. If you head out close to sunset, be seen and be findable: wear a light and something reflective on the parts of you that move, pick a route with streetlights and other people, and send someone a live location link with a return time before you go. Our guide to running in the dark after the clocks change covers the rest.
Questions people ask
What time does it get dark in Flagstaff in winter?
In mid-December the sun sets around 5:17 PM in Flagstaff and last light (the end of civil twilight) is around 5:45 PM. The earliest sunset of 2026 is about 5:15 PM, around December 5.
When is the latest sunset in Flagstaff?
The latest sunset of 2026 in Flagstaff is about 7:46 PM, around June 28. In mid-June, usable light lasts until roughly 8:13 PM.
Does Flagstaff change its clocks for daylight saving time?
No. Most of Arizona does not observe daylight saving time, so sunset in Flagstaff moves gradually through the year with no one-hour jump in March or November.
What time should I start a run in Flagstaff to finish before dark?
Subtract your run time from sunset. A 60-minute run in Flagstaff should start by about 4:17 PM in mid-December and by about 6:43 PM in mid-June. The table on this page lists the latest start for 30 and 60 minute runs in every month, and the calculator at the top gives today's times.
Keep reading
Calculated from Flagstaff's coordinates (35.20, -111.65) with the standard solar position formulas used by NOAA. Times can differ by a minute or two from other sources, and hills or buildings bring darkness sooner.