# How is the daily summary calculated on historical records? i.e. >1000 degrees some places?

• Question
• Updated 6 years ago
2011-09-19 TJIG station has reasonable temperatures for all of it's observations:

http://api.wunderground.com/api/MY_AP...

"tempm":"23.3", "tempi":"73.9"
"tempm":"23.3", "tempi":"73.9"
"tempm":"23.3", "tempi":"73.9"
"tempm":"23.3", "tempi":"73.9"
"tempm":"22.8", "tempi":"73.0"
"tempm":"22.8", "tempi":"73.0"
"tempm":"23.3", "tempi":"73.9"
"tempm":"24.4", "tempi":"75.9"
"tempm":"25.6", "tempi":"78.1"
"tempm":"25.6", "tempi":"78.1"
"tempm":"25.6", "tempi":"78.1"
"tempm":"24.4", "tempi":"75.9"
"tempm":"24.4", "tempi":"75.9"
"tempm":"24.4", "tempi":"75.9"
"tempm":"25.0", "tempi":"77.0"
"tempm":"25.0", "tempi":"77.0"
"tempm":"25.0", "tempi":"77.0"
"tempm":"24.4", "tempi":"75.9"
"tempm":"24.4", "tempi":"75.9"
"tempm":"24.4", "tempi":"75.9"
"tempm":"23.9", "tempi":"75.0"
"tempm":"23.9", "tempi":"75.0"
"tempm":"24.4", "tempi":"75.9"
"tempm":"24.4", "tempi":"75.9"

But the daily summary for the day is way off:

Max Temp of 1000 degrees Celsius and 1120 degrees F??

Mean Temp Celsius is 3?

Mean Temp Fahrenheit is 37?

"meantempm":"3",
"meantempi":"37",
"maxtempm":"1000",
"maxtempi":"1120",
"mintempm":"23",
"mintempi":"73",

Are the daily summaries computed by Weather Underground or the reporting stations?

Is there a way to get these fixed up?

In the last 3 years, I see:

~120 entries with maxtempi > 130
~470 entries with maxtempi > 120
11 with maxtemi > 140

| 2011-09-18 | TJSJ | 1000.0 | 1120.0 |
| 2011-09-18 | TJIG | 1000.0 | 1120.0 |
| 2013-04-29 | PAOM | 111.0 | 231.0 |
| 2012-10-12 | CYCD | 99.0 | 210.0 |
| 2012-05-04 | CYCD | 82.0 | 180.0 |
| 2012-08-11 | MHCA | 82.0 | 180.0 |
| 2013-10-31 | KEBG | 80.0 | 176.0 |
| 2012-07-01 | DAUE | 73.0 | 164.0 |
| 2013-06-05 | UTAA | 73.0 | 163.0 |
| 2013-01-10 | SLVM | 67.0 | 153.0 |
| 2012-08-04 | MMAA | 66.0 | 151.0 |

Same at the other end of the spectrum. I know Alaska is cold, but not colder then the South Pole.

| 2014-01-27 | PACY | -573.0 | -1000.0 |
| 2014-01-25 | PACY | -573.0 | -1000.0 |
| 2013-01-20 | KRDD | -573.0 | -1000.0 |
| 2014-01-25 | PAYA | -573.0 | -1000.0 |
| 2014-01-26 | PACY | -573.0 | -1000.0 |
| 2014-01-26 | PAYA | -573.0 | -1000.0 |
| 2011-10-11 | PACY | -573.0 | -1000.0 |
| 2014-01-27 | PAYA | -573.0 | -1000.0 |
| 2011-10-11 | PAYA | -573.0 | -1000.0 |
| 2013-01-19 | KRDD | -573.0 | -1000.0 |

- Robert
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Posted 6 years ago

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