September 2021 Weather History in Ann Arbor Michigan, United States

The data for this report comes from the Detroit Metropolitan Wayne County Airport. See all nearby weather stations

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

Ann Arbor Temperature History September 2021

Temperature history in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303030°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°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 Ann Arbor

Hourly Temperature in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAugOctcoldcoolwarmhotcomfortable
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 2021 in Ann Arbor

Cloud Cover in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 Ann Arbor

Daily Precipitation in September 2021 in Ann Arbor181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 inAugOct
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in September 2021 in Ann Arbor

Observed Weather in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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
Sat, Sep 4 Light Rain0.02 in-RA
Sun, Sep 5 Light Rain-RA
Mon, Sep 6 Heavy Rain, Rain, Light Rain, Mist0.13 in+RA, RA, -RA, BR
Tue, Sep 7 Thunderstorm with Light Rain, Light Rain0.22 in-TSRA, -RA
Wed, Sep 8 Thunderstorm with Heavy Rain, Thunderstorm with Light Rain, Thunderstorm with Rain, Light Rain, Mist, Shallow Fog0.12 in+TSRA, -TSRA, TSRA, -RA, BR, MIFG
Thu, Sep 9 Light Rain0.00 in-RA
Tue, Sep 14 Thunderstorm, Thunderstorm in the Vicinity, Thunderstorm with Light Rain, Light Rain, Fog, Mist, Shallow Fog0.29 inTS, VCTS, -TSRA, -RA, FG, BR, MIFG
Thu, Sep 16 Shallow FogMIFG
Fri, Sep 17 Mist, Shallow FogBR, MIFG
Sat, Sep 18 MistBR
Tue, Sep 21 Heavy Rain, Rain, Light Rain, Mist1.53 in+RA, RA, -RA, BR
Wed, Sep 22 Heavy Rain, Rain, Light Rain, Light Drizzle, Haze, Mist1.77 in+RA, RA, -RA, -DZ, HZ, BR
Thu, Sep 23 Heavy Rain, Rain, Light Rain, Light Drizzle, Mist1.16 in+RA, RA, -RA, -DZ, BR
Sat, Sep 25 Rain, Light Rain, Light Drizzle, Mist0.18 inRA, -RA, -DZ, BR
Thu, Sep 30 Mist, Shallow FogBR, MIFG

Hours of Daylight and Twilight in September 2021 in Ann Arbor

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 Ann Arbor

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 Ann Arbor

Solar Elevation and Azimuth in September 2021 in Ann ArborSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct0010102020303040405000101020203030404050
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 Ann Arbor

Moon Rise, Set & Phases in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctSep 68:52 PMSep 68:52 PMSep 207:55 PMSep 207:55 PMOct 67:06 AMOct 67:06 AM6:20 AM6:20 AM8:19 PM8:19 PM7:53 PM7:53 PM7:48 AM7:48 AM7:36 AM7:36 AM7:36 PM7:36 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
29%1:09 AMNE5:09 PMNW-9:08 AMS248,767 mi
2
21%1:59 AMNE5:59 PMNW-10:00 AMS246,553 mi
3
13%2:56 AMNE6:42 PMWNW-10:52 AMS243,840 mi
4
7%4:01 AMENE7:19 PMWNW-11:44 AMS240,853 mi
5
2%5:09 AMENE7:51 PMWNW-12:34 PMS237,840 mi
6
0%6:20 AMENE8:19 PMWNW-1:23 PMS235,040 mi
7
1%7:32 AME8:45 PMW-2:11 PMS232,654 mi
8
4%8:44 AME9:10 PMW-2:59 PMS230,823 mi
9
10%9:57 AME9:35 PMW-3:47 PMS229,617 mi
10
18%11:12 AMESE10:03 PMWSW-4:38 PMS229,031 mi
11
28%12:27 PMESE10:35 PMWSW-5:31 PMS229,007 mi
12
40%1:44 PMESE11:13 PMWSW-6:29 PMS229,456 mi
13
50%2:57 PMSE--7:29 PMS230,286 mi
14
63%-12:00 AMSW4:05 PMSE8:31 PMS231,420 mi
15
74%-12:57 AMSW5:04 PMSE9:33 PMS232,811 mi
16
84%-2:02 AMSW5:52 PMESE10:32 PMS234,434 mi
17
91%-3:12 AMWSW6:31 PMESE11:27 PMS236,280 mi
18
94%-4:23 AMWSW7:03 PMESE--
19
96%-5:34 AMWSW7:29 PMESE12:18 AMS238,334 mi
20
100%-6:42 AMW7:53 PME1:05 AMS240,559 mi
21
100%-7:48 AMW8:15 PME1:49 AMS242,883 mi
22
98%-8:52 AMW8:36 PME2:31 AMS245,198 mi
23
95%-9:56 AMWNW8:59 PMENE3:13 AMS247,362 mi
24
89%-10:58 AMWNW9:23 PMENE3:55 AMS249,213 mi
25
82%-12:01 PMWNW9:51 PMENE4:38 AMS250,588 mi
26
74%-1:03 PMWNW10:23 PMENE5:23 AMS251,334 mi
27
66%-2:03 PMNW11:02 PMNE6:10 AMS251,330 mi
28
50%-3:00 PMNW11:48 PMNE6:59 AMS250,504 mi
29
46%-3:52 PMNW-7:50 AMS248,846 mi
30
36%12:41 AMNE4:37 PMNW-8:41 AMS246,419 mi

Humidity Comfort Levels in September 2021 in Ann Arbor

Humidity Comfort Levels in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 Ann Arbor

Wind Speed in September 2021 in Ann Arbor181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mph60 mph60 mphAugOct
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in September 2021 in Ann Arbor

Hourly Wind Speed in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 Ann Arbor

Hourly Wind Direction in 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 Ann Arbor

Atmospheric Pressure in September 2021 in Ann Arbor1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303029.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 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 Detroit Metropolitan Wayne County Airport page.

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