Casey, Antarctica
September 2025 Daily Weather Observations

DateDayTempsRainEvapSunMax wind gust9 am3 pm
MinMaxDirSpdTimeTempRHCldDirSpdMSLPTempRHCldDirSpdMSLP
°C°Cmmmmhourskm/hlocal°C%8thkm/hhPa°C%8thkm/hhPa
1Mo-11.3-9.30.8 0.0E5401:59-10.884 S15980.6-10.581 S24982.7
2Tu-16.5-11.35.4 0.0SSE2603:20-12.084 SE9988.5-11.6817NNE13988.5
3We-17.8-14.60 0.9NE5204:43-14.970 NE30983.7-16.676 N15982.9
4Th-18.0-14.80 0.0NE3104:35-16.867 NE15982.7-16.371 NE9984.2
5Fr-24.0-7.30 0.0ENE8317:35-16.359 NE33992.6-13.283 NW11987.5
6Sa-16.1-10.55.0 0.0S3901:37-11.985 NE13991.7-11.582 NNE9993.0
7Su-14.2-13.40.2 0.0NNE3102:53-14.1838NE22991.8-14.786 E13991.6
8Mo-24.3-6.40 1.0SSE2203:52-22.169 S9995.6-19.257 SE9995.7
9Tu-22.1-5.40 0.0E6508:18-8.556 S15987.2-10.077 S11987.3
10We-13.8-9.69.8 0.0SE2814:47-12.286 NE7985.7-10.570 SE17984.3
11Th-15.8-9.91.0 5.7E2601:51-12.3718ESE7979.4-15.365 Calm977.4
12Fr-16.9-13.30.2 0.0NE2809:05-14.968 NE20984.5-14.171 Calm987.3
13Sa-18.7-14.10 0.0NE3020:06-14.173 NE2988.3-15.182 NNE6987.6
14Su-16.7-14.50.6 0.0NE1108:07-15.577 Calm987.6-15.577 Calm986.3
15Mo-22.4-17.00.6 6.2NE2418:03-19.374 NNE13986.9-21.5761NNE13988.1
16Tu-24.8-7.00 0.2ENE11320:36-20.3688S15985.5-8.467 E39980.5
17We-20.3-5.42.6 0.0E17221:57-7.384 E96971.6-8.875 E89969.1
18Th-12.7-8.34.4 7.2ENE10901:59-8.362 E65981.0-10.361 S7983.9
19Fr-17.7-12.10 1.9ENE3105:24-13.868 S7981.0-14.075 E11979.0
20Sa-21.7-16.10 1.4NE3312:12-17.980 NE20971.1-16.582 ENE7970.3
21Su-23.7-7.20 2.1SE5720:44-20.453 E33979.6-17.362 E15981.0
22Mo-20.1-4.20 0.4E13017:34-9.653 SE7972.7-8.957 E72970.4
23Tu-17.6-9.50 9.5NNE4423:45-16.7673SSE15978.6-10.968 Calm978.7
24We-16.6-14.30 9.8NE4809:07-15.972 NE33982.4-15.777 NNE13982.2
25Th-19.7-14.30 0.0ENE3019:39-16.574 E7979.7-15.064 NE19981.9
26Fr-16.9-13.90 6.1NE3503:02-15.470 NNE20989.3-15.1693S9990.0
27Sa-25.2-20.40 11.5SSE5622:08-23.262 S9988.9-20.861 S30988.9
28Su-24.6-14.20 11.1S6102:12-22.455 S28989.4-16.959 SSE22991.7
29Mo-20.8-8.00 0.0E9417:19-14.554 SSE11996.7-14.3748NNE15996.4
30Tu-15.7-10.910.4 1.4ENE3500:32-12.485 NNE13994.9-12.280 NNE19993.3
Statistics for September 2025
Mean-18.9-11.2  2.5   -15.0706 19985.0-14.0724 17984.7
Lowest-25.2-20.40 0.0   -23.2533Calm971.1-21.5571Calm969.1
Highest-11.3-4.210.4 11.5E172 -7.3868E96996.7-8.4868E89996.4
Total  41.0 76.4               

IDCJDW9203.202509   Prepared at 13:04 UTC on Tuesday 11 August 2026

Source of data

Observations were drawn from Casey {station 300017}.

"9 am" observations are those made at 0300 UTC. This is equivalent to 10 am Local Standard Time, but 11am according to the time used by most people at the station. "3 pm" observations are similarly those made at 0900 UTC (4 pm LST, 5 pm station time).The maximum wind gust is in the 24 hours to 1 am local standard time.

You should read the important information in these notes.

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Other times and other places

The last 14 months of Daily Weather Observations for Casey, Antarctica are also here on this web site:

Aug 26   Jul 26   Jun 26   May 26   Apr 26   Mar 26   Feb 26   Jan 26   
Dec 25   Nov 25   Oct 25   Sep 25   Aug 25   Jul 25   

Daily Weather Observations are also routinely prepared for hundreds of other locations in Antarctica and across Australia. To get other months or places not on this web site, contact us.

Climate statistics

If you are after long-term averages relevant to Casey, Antarctica, look at the tables for Casey or Casey (The Tunnel).

Maps and tables of average conditions for locations across Australia are also available.

More information

If you are using these pages, you are deemed to have understood the important information in these notes. They cover how the data are obtained, how they are processed, and what each column means.

If you have any questions about this product, or you want any other weather or climate information, please contact us.