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September weather stats: record-breaking rains!

Posted by Bret B on October 3, 2014, 4:15 pm
187.148.175.45

September 2014 was a little cooler than the historical average, and quite a bit cooler than the previous 3 months. Yay! That was thanks to all the rainy days we had: 3 heavy spells of rain from tropical storms (Norbert, Odile, Polo) and several other rains from standard thunderstorms.

Check this out: September shattered the previous rainiest September on record, and was the all-time rainiest month on record (2004-2014.) See below for details. We managed to not have a lot of damaging flooding, probably because July & August were so dry. The ground was able to soak up some of the heavy rains (at least from Norbert anyway.) Hope we don't get a deluge any time soon, because it would run off a lot faster now since the ground is still somewhat saturated.

Rain:
Total for month: 22.16" / 563mm (Wow!)
Rainiest day: 7.04" / 179mm on 9/3
YTD total (thru 9/30): 40.56" / 1030mm
Historical avg September rainfall (2004-2013): 10.32" / 262mm

Temperature:
Highest: 90.9°F / 32.7°C on 9/27
Lowest: 74.1°F / 23.4°C on 9/4
Avg daily maximum during the month: 87.5°F / 30.8°C
Avg daily minimum during the month: 77.7°F / 25.4°C
Historical avg daily max temp for Sep (2004-2013): 88.5°F / 31.4°C

Humidity:
Highest: 88% on several dates
Lowest: 56% on 9/21
Avg daily maximum during the month: 85.0%
Avg daily minimum during the month: 70.9%

Heat index: (approximate)
Highest: 109°F / 43°C on 9/27
Avg daily maximum during the month: 99.4°F / 37.4°C
Historical avg daily max HI for Sep (2004-2013): 101.3°F / 38.5°C

Records:
Rainiest September (previous record: 15.40" / 391mm in 2010)
Rainiest of any month (previous record was 16.64" / 423mm in October 2011 (Hurricane Jova))
2nd-highest 1-day rainfall: 7.04" / 179mm, on 9/3, during Norbert.
3rd-highest multi-day storm total: 12.40" / 315mm, 9/1 thru 9/4 (Norbert)

(Keep in mind that the temperature readings took a step up in Sep 2011 when the measuring location moved from Deanna & Darwin's apartments up in the breezes above the church, down to my un-breezy and warmer backyard in the flats near the Jardin. Could be a 2-4 degree F difference on calm hot days(??))
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Re: September weather stats: record-breaking rains!

Posted by Mark S. on October 4, 2014, 1:54 pm, in reply to "September weather stats: record-breaking rains!"
187.146.131.182

Thanks, Bret B., you are the most enlightening poster on this sight. And you make the tropical depressions and hurricanes stay safely away from us.

Good job.

Now, get to work on the mosquitos, por favor.
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