September 2021 Weather History in Pasadena California, United States

The data for this report comes from the Los Angeles International Airport. See all nearby weather stations

This report shows the past weather for Pasadena, providing a weather history for September 2021. It features all historical weather data series we have available, including the Pasadena temperature history for September 2021. You can drill down from year to month and even day level reports by clicking on the graphs.

Pasadena Temperature History September 2021

Temperature history in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303055°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°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 2021 in Pasadena

Hourly Temperature in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOctcoolcomfortablewarm
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.
Map
Marker
© OpenStreetMap contributors

Compare Pasadena to another city:

Map

Cloud Cover in September 2021 in Pasadena

Cloud Cover in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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.

Daily Precipitation in September 2021 in Pasadena

Daily Precipitation in September 2021 in Pasadena181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inAugOct
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in September 2021 in Pasadena

Observed Weather in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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
Fri, Sep 3 Haze, MistHZ, BR
Sun, Sep 5 Haze, MistHZ, BR
Tue, Sep 7 HazeHZ
Wed, Sep 8 Haze, Fog, MistHZ, FG, BR
Thu, Sep 9 Haze, Fog, Mist, Patches of Fog0.00 inHZ, FG, BR, BCFG
Fri, Sep 10 Haze, Fog, Mist, Patches of FogHZ, FG, BR, BCFG
Sun, Sep 12 Fog, MistFG, BR
Mon, Sep 13 Haze, Fog, Mist, Patches of FogHZ, FG, BR, BCFG
Tue, Sep 14 Haze, MistHZ, BR
Wed, Sep 15 Haze, MistHZ, BR
Thu, Sep 16 HazeHZ
Fri, Sep 17 HazeHZ
Sun, Sep 19 HazeHZ
Mon, Sep 20 Haze, MistHZ, BR
Thu, Sep 23 Haze, MistHZ, BR
Fri, Sep 24 Haze, MistHZ, BR
Sat, Sep 25 MistBR

Hours of Daylight and Twilight in September 2021 in Pasadena

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 2021 in Pasadena

The solar day over the course of September 2021. 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 2021 in Pasadena

Solar Elevation and Azimuth in September 2021 in PasadenaSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct001010202030304040505060001010202030304040505060
northeastsouthwest
Solar elevation and azimuth over the course of September 2021. 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 2021 in Pasadena

Moon Rise, Set & Phases in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctSep 65:52 PMSep 65:52 PMSep 204:55 PMSep 204:55 PMOct 64:06 AMOct 64:06 AM5:58 AM5:58 AM7:29 PM7:29 PM7:09 PM7:09 PM7:13 AM7:13 AM6:59 AM6:59 AM7:01 PM7:01 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 2021IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
28%12:59 AMENE4:03 PMWNW-8:31 AMS248,583 mi
2
20%1:50 AMENE4:53 PMWNW-9:23 AMS246,311 mi
3
12%2:47 AMENE5:39 PMWNW-10:15 AMS243,561 mi
4
6%3:48 AMENE6:19 PMWNW-11:07 AMS240,561 mi
5
2%4:52 AMENE6:56 PMWNW-11:57 AMS237,559 mi
6
0%5:58 AMENE7:29 PMWNW-12:46 PMS234,790 mi
7
1%7:03 AME8:01 PMW-1:34 PMS232,452 mi
8
4%8:10 AME8:31 PMW-2:22 PMS230,680 mi
9
10%9:17 AME9:03 PMW-3:11 PMS229,534 mi
10
19%10:25 AMESE9:37 PMWSW-4:01 PMS229,006 mi
11
29%11:35 AMESE10:16 PMWSW-4:55 PMS229,031 mi
12
41%12:45 PMESE11:00 PMWSW-5:52 PMS229,520 mi
13
50%1:54 PMESE11:51 PMWSW-6:53 PMS230,382 mi
14
64%3:00 PMESE--7:55 PMS231,543 mi
15
75%-12:49 AMWSW3:58 PMESE8:56 PMS232,956 mi
16
84%-1:53 AMWSW4:49 PMESE9:55 PMS234,601 mi
17
92%-3:00 AMWSW5:32 PMESE10:49 PMS236,467 mi
18
97%-4:06 AMWSW6:08 PMESE11:39 PMS238,539 mi
19
98%-5:11 AMWSW6:40 PMESE--
20
100%-6:13 AMW7:09 PME12:26 AMS240,777 mi
21
100%-7:13 AMW7:36 PME1:10 AMS243,106 mi
22
98%-8:12 AMW8:03 PME1:52 AMS245,413 mi
23
94%-9:10 AMWNW8:30 PMENE2:34 AMS247,554 mi
24
89%-10:07 AMWNW9:00 PMENE3:16 AMS249,367 mi
25
82%-11:05 AMWNW9:32 PMENE4:00 AMS250,688 mi
26
74%-12:03 PMWNW10:09 PMENE4:45 AMS251,367 mi
27
65%-12:59 PMWNW10:51 PMENE5:32 AMS251,288 mi
28
50%-1:54 PMWNW11:39 PMENE6:22 AMS250,381 mi
29
45%-2:45 PMWNW-7:13 AMS248,645 mi
30
35%12:33 AMENE3:32 PMWNW-8:04 AMS246,151 mi

Humidity Comfort Levels in September 2021 in Pasadena

Humidity Comfort Levels in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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.

Wind Speed in September 2021 in Pasadena

Wind Speed in September 2021 in Pasadena181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mph30 mph30 mph35 mph35 mph40 mph40 mphAugOct
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in September 2021 in Pasadena

Hourly Wind Speed in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOct
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2021 in Pasadena

Hourly Wind Direction in 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOct
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in September 2021 in Pasadena

Atmospheric Pressure in September 2021 in Pasadena1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303029.7 inHg29.7 inHg29.8 inHg29.8 inHg29.9 inHg29.9 inHg30.0 inHg30.0 inHg30.1 inHg30.1 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 Los Angeles International Airport page.

See all nearby weather stations

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.