Cheyenne, WY · September 2027

Cheyenne sunrise and sunset in September 2027

Short answer

Cheyenne loses 78 minutes of daylight in September 2027, from 13 h 06 min on the 1st to 11 h 48 min on the 30th. The biggest one-day change is 2.7 minutes, on September 25.
September 1
13 h 06 min
September 30
11 h 48 min

September at a glance

Cheyenne loses 78 minutes of daylight in September 2027, from 13 h 06 min on the 1st to 11 h 48 min on the 30th. The biggest one-day change is 2.7 minutes, on September 25.

00:0003:0006:0009:0012:0015:0018:0021:00Sep 1Sep 8Sep 15Sep 22Sep 29
Each column is one day, from sunrise to sunset in local clock time (MDT).

Sunrise ranges from 6:25 AM on September 1 to 6:54 AM on September 30, and sunset from 6:43 PM on September 30 to 7:32 PM on September 1. Clocks stay on MDT all month.

The average September day, 12 h 27 min, is 79 minutes shorter than August's and 82 minutes longer than October's.

September in the year

Average day length for each month of 2027 in Cheyenne, with September marked. The longest month on average is June and the shortest is December.

12 h 27 minJFMAMJJASOND

Compared with other capitals

On September 15, Cheyenne gets 12 h 29 min of daylight, 19th of the 51 capitals. Juneau has the most that day, 12 h 50 min, and Honolulu the least, 12 h 16 min. Among neighboring capitals, Helena gets 12 h 34 min, Pierre gets 12 h 32 min, Lincoln gets 12 h 29 min, Denver gets 12 h 28 min, Salt Lake City gets 12 h 29 min, Boise gets 12 h 31 min.

Every day in September 2027

DayCivil dawnSunriseSolar noonSunsetCivil duskDaylightChange
Sep 15:57 AM6:25 AM12:59 PM7:32 PM8:00 PM13 h 06 min
Sep 25:58 AM6:26 AM12:58 PM7:30 PM7:58 PM13 h 04 min-2:38
Sep 35:59 AM6:27 AM12:58 PM7:28 PM7:56 PM13 h 01 min-2:38
Sep 46:00 AM6:28 AM12:58 PM7:27 PM7:55 PM12 h 58 min-2:39
Sep 56:01 AM6:29 AM12:57 PM7:25 PM7:53 PM12 h 56 min-2:39
Sep 66:02 AM6:30 AM12:57 PM7:23 PM7:51 PM12 h 53 min-2:40
Sep 76:03 AM6:31 AM12:57 PM7:22 PM7:50 PM12 h 50 min-2:40
Sep 86:04 AM6:32 AM12:56 PM7:20 PM7:48 PM12 h 48 min-2:40
Sep 96:05 AM6:33 AM12:56 PM7:18 PM7:46 PM12 h 45 min-2:41
Sep 106:06 AM6:34 AM12:56 PM7:17 PM7:44 PM12 h 42 min-2:41
Sep 116:07 AM6:35 AM12:55 PM7:15 PM7:43 PM12 h 40 min-2:41
Sep 126:08 AM6:36 AM12:55 PM7:13 PM7:41 PM12 h 37 min-2:42
Sep 136:09 AM6:37 AM12:55 PM7:12 PM7:39 PM12 h 34 min-2:42
Sep 146:10 AM6:38 AM12:54 PM7:10 PM7:37 PM12 h 32 min-2:42
Sep 156:12 AM6:39 AM12:54 PM7:08 PM7:36 PM12 h 29 min-2:42
Sep 166:13 AM6:40 AM12:54 PM7:06 PM7:34 PM12 h 26 min-2:42
Sep 176:14 AM6:41 AM12:53 PM7:05 PM7:32 PM12 h 23 min-2:43
Sep 186:15 AM6:42 AM12:53 PM7:03 PM7:30 PM12 h 21 min-2:43
Sep 196:16 AM6:43 AM12:53 PM7:01 PM7:29 PM12 h 18 min-2:43
Sep 206:17 AM6:44 AM12:52 PM7:00 PM7:27 PM12 h 15 min-2:43
Sep 216:18 AM6:45 AM12:52 PM6:58 PM7:25 PM12 h 13 min-2:43
Sep 226:19 AM6:46 AM12:51 PM6:56 PM7:24 PM12 h 10 min-2:43
Sep 236:20 AM6:47 AM12:51 PM6:54 PM7:22 PM12 h 07 min-2:43
Sep 246:21 AM6:48 AM12:51 PM6:53 PM7:20 PM12 h 04 min-2:43
Sep 256:22 AM6:49 AM12:50 PM6:51 PM7:18 PM12 h 02 min-2:43
Sep 266:23 AM6:50 AM12:50 PM6:49 PM7:17 PM11 h 59 min-2:43
Sep 276:24 AM6:51 AM12:50 PM6:48 PM7:15 PM11 h 56 min-2:43
Sep 286:25 AM6:52 AM12:49 PM6:46 PM7:13 PM11 h 54 min-2:43
Sep 296:26 AM6:53 AM12:49 PM6:44 PM7:12 PM11 h 51 min-2:43
Sep 306:27 AM6:54 AM12:49 PM6:43 PM7:10 PM11 h 48 min-2:43
Local clock time (MDT). Sunrise and sunset when the sun's center is 0.833° below the horizon; civil twilight at 6°.

How these times are computed

Each row runs the SunCalc solar model for the stored capitol coordinate, 41.140° N, 104.820° W, and converts the result to local clock time with the America/Denver time zone rules. Times assume a flat, open horizon at sea level. Hills, buildings and elevation shift what you see by a few minutes. The sunrise and sunset guide walks through the calculation.

Questions people ask

What time is sunrise in Cheyenne in September?

Between 6:25 AM (September 1) and 6:54 AM (September 30) in 2027, local time.

What time is sunset in Cheyenne in September?

Between 6:43 PM (September 30) and 7:32 PM (September 1) in 2027, local time.

How many hours of daylight does Cheyenne get in September?

12 h 27 min on average, from 13 h 06 min on September 1 to 11 h 48 min on September 30.

Sources and data as of

Data as of: computed for September 2027 at 41.140° N, 104.820° W.

  1. 01SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
  2. 02IANA time zone database (clock times and daylight saving rules)

How every number is computed: methodology. Spotted a wrong figure? Report an error.