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September 2024 Weather History in Aspen Colorado, United States

The data for this report comes from the Cottonwood Pass. See all nearby weather stations

This report shows the past weather for Aspen, providing a weather history for September 2024. It features all historical weather data series we have available, including the Aspen temperature history for September 2024. You can drill down from year to month and even day level reports by clicking on the graphs.

Aspen Temperature History September 2024

History:20262025JFMAMJJASepOND20232022
Temperature history in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303020°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FAugOct
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Hourly Temperature in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOctvery coldcoldcoolwarmcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Cloud Cover in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOct
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Observed Weather in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Observed Weather in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOct
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Wed, Sep 4 Thunderstorm in the VicinityVCTS
Thu, Sep 5 Thunderstorm, Thunderstorm in the Vicinity, Thunderstorm with Heavy Rain, Thunderstorm with Light Drizzle, Thunderstorm with Light Rain, Thunderstorm with Light Rain in the Vicinity, Light Rain, Light DrizzleTS, VCTS, +TSRA, -TSDZ, -TSRA, -VCTSRA, -RA, -DZ
Fri, Sep 6 Light Rain-RA
Sat, Sep 7 Thunderstorm in the Vicinity, Thunderstorm with Light Drizzle, Light RainVCTS, -TSDZ, -RA
Sun, Sep 8 Thunderstorm in the Vicinity, Unknown PrecipitationVCTS, UP
Mon, Sep 9 Thunderstorm in the VicinityVCTS
Tue, Sep 10 Thunderstorm in the Vicinity, Rain, Light RainVCTS, RA, -RA
Wed, Sep 11 Thunderstorm, Thunderstorm in the Vicinity, Rain, Light RainTS, VCTS, RA, -RA
Sun, Sep 15 Thunderstorm, Thunderstorm in the Vicinity, Thunderstorm with Light Rain in the Vicinity, Light RainTS, VCTS, -VCTSRA, -RA
Mon, Sep 16 Thunderstorm with Rain in the Vicinity, Rain, Light Rain, Drizzle, Light DrizzleVCTSRA, RA, -RA, DZ, -DZ
Tue, Sep 17 Thunderstorm in the Vicinity, Rain, Light RainVCTS, RA, -RA
Sat, Sep 21 Light Snow, Heavy Rain, Rain, Light Rain, Drizzle, Light Drizzle-SN, +RA, RA, -RA, DZ, -DZ
Sun, Sep 22 Rain, Light Rain, Drizzle, Light DrizzleRA, -RA, DZ, -DZ
Fri, Sep 27 Light Rain-RA

Hours of Daylight and Twilight in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Hours of Daylight and Twilight in September 2024 in Aspen181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 10 minSep 2212 hr, 10 minnightnightdaydaySep 113 hr, 0 minSep 113 hr, 0 minSep 3011 hr, 47 minSep 3011 hr, 47 minSep 1112 hr, 36 minSep 1112 hr, 36 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Sunrise & Sunset with Twilight in September 2024 in Aspen181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOct6:36 AM6:36 AMSep 17:36 PMSep 17:36 PM7:02 AM7:02 AMSep 306:50 PMSep 306:50 PM6:45 AM6:45 AMSep 117:21 PMSep 117:21 PM6:54 AM6:54 AMSep 217:04 PMSep 217:04 PM
The solar day over the course of September 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Solar Elevation and Azimuth in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Solar Elevation and Azimuth in September 2024 in AspenSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOct00101020203030404050500010102020303040405060
northeastsouthwest
Solar elevation and azimuth over the course of September 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Moon Rise, Set & Phases in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctSep 27:56 PMSep 27:56 PMSep 178:35 PMSep 178:35 PMOct 212:50 PMOct 212:50 PM6:05 AM6:05 AM7:41 PM7:41 PM7:10 PM7:10 PM7:27 AM7:27 AM6:55 AM6:55 AM6:46 PM6:46 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
2%5:02 AMENE7:18 PMWNW-12:14 PMS249,268 mi
2
0%6:05 AMENE7:41 PMWNW-12:56 PMS250,643 mi
3
0%7:05 AME8:01 PMW-1:35 PMS251,656 mi
4
3%8:04 AME8:21 PMW-2:14 PMS252,260 mi
5
7%9:02 AME8:40 PMW-2:52 PMS252,391 mi
6
13%10:01 AMESE9:01 PMWSW-3:32 PMS251,973 mi
7
20%11:02 AMESE9:25 PMWSW-4:14 PMS250,934 mi
8
28%12:04 PMESE9:53 PMWSW-4:58 PMS249,217 mi
9
38%1:08 PMESE10:27 PMSW-5:47 PMS246,804 mi
10
48%2:12 PMSE11:09 PMSW-6:41 PMS243,732 mi
11
50%3:14 PMSE--7:38 PMS240,111 mi
12
69%-12:02 AMSW4:10 PMSE8:38 PMS236,137 mi
13
79%-1:05 AMSW4:58 PMSE9:38 PMS232,092 mi
14
88%-2:17 AMWSW5:39 PMESE10:36 PMS228,320 mi
15
95%-3:34 AMWSW6:13 PMESE11:32 PMS225,185 mi
16
97%-4:52 AMWSW6:43 PMESE--
17
100%-6:10 AMW7:10 PME12:25 AMS223,017 mi
18
100%-7:27 AMW7:36 PME1:16 AMS222,047 mi
19
98%-8:45 AMW8:03 PMENE2:07 AMS222,373 mi
20
92%-10:03 AMWNW8:33 PMENE2:59 AMS223,931 mi
21
85%-11:21 AMWNW9:09 PMENE3:52 AMS226,519 mi
22
75%-12:38 PMNW9:51 PMNE4:49 AMS229,837 mi
23
64%-1:49 PMNW10:42 PMNE5:47 AMS233,544 mi
24
50%-2:51 PMNW11:41 PMNE6:46 AMS237,316 mi
25
42%-3:42 PMNW-7:44 AMS240,888 mi
26
32%12:44 AMNE4:24 PMWNW-8:38 AMS244,075 mi
27
22%1:50 AMENE4:56 PMWNW-9:27 AMS246,771 mi
28
15%2:55 AMENE5:23 PMWNW-10:13 AMS248,934 mi
29
8%3:57 AMENE5:47 PMWNW-10:55 AMS250,568 mi
30
4%4:58 AMENE6:07 PMW-11:35 AMS251,701 mi

Humidity Comfort Levels in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Humidity Comfort Levels in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOct
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Growing Degree Days in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Growing Degree Days in September 2024 in AspenSep112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°F1,800°F1,800°FAugOct
The growing degree days accumulated from reported temperatures over the course of September 2024 (solid black line), placed over the average accumulation (faint line), with 25th to 75th and 10th to 90th percentile bands. Gaps indicate days without enough temperature reports to calculate a complete daily value; totals following gaps may therefore be understated.

Atmospheric Pressure in September 2024 in Aspen

History:20262025JFMAMJJASepOND20232022
Atmospheric Pressure in September 2024 in Aspen1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303030.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHg30.6 inHg30.6 inHgAugOct
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

The details of the data sources used for this report can be found on the Cottonwood Pass page.

See all nearby weather stations

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