Weather data from the unofficial station on the roof of the Eyring Science Center on the campus of Brigham Young University in Provo, Utah, USA.

Sat, Nov 07, 2009 4:05:38 AM
Current Values Past 24 hours
 Temperature   4.2oC    falling 1.08oC/hour  Maximum:   21.1oC   at 15:31:30, 11/6/2009 
 Minimum:   3.7oC   at 02:16:30, 11/7/2009 
 Mean1:   12.4oC 
 Average2:   13.0oC 
 Relative Humidity   56%    rising 6.4%/hour  Maximum:   57.5%   at 02:39:30, 11/7/2009 
 Minimum:   14.2%   at 15:17:30, 11/6/2009 
 Mean1:   35.8% 
 Average2:   30.5% 
 Dewpoint   -3.7oC    rising 0.58oC/hour  Maximum:   -2.1oC   at 09:18:30, 11/6/2009 
 Minimum:   -8.0oC   at 16:11:30, 11/6/2009 
 Mean1:   -5.1oC 
 Average2:   -5.1oC 
 Sea Level Pressure   100.0 kPa    falling 0.00 kPa/hour  Maximum:   100.9 kPa   at 10:27:30, 11/6/2009 
 Minimum:   100.0 kPa   at 03:17:30, 11/7/2009 
 Mean1:   100.5 kPa 
 Average2:   100.4 kPa 
 Station Pressure   84.2 kPa   Maximum:   85.1 kPa   at 11:16:30, 11/6/2009 
 Minimum:   84.2 kPa   at 03:16:30, 11/7/2009 
 Mean1:   84.6 kPa 
 Average2:   84.6 kPa 
 Wind Speed   0.0 m/s from NNE (21o)  Maximum:   9.5 m/s from SW (217o)   at 11:41:30, 11/6/2009 
 Average2:   1.9 m/s 
 Wind Direction   Average3:   from S (189o) 
 Solar Irradiance   49 W/m2    rising 0.7 (W/m2)/hour  Maximum:   600.3 W/m2   at 12:22:30, 11/6/2009 
 Average2:   173.7 W/m2 
 Rainfall this month   0.00 mm 
 Rainfall since midnight   0.00 mm   Past 24 hours   0.00 mm 
 Maximum rate   0.000 mm/hour   at 04:06:00, 11/6/2009 
 Wind-Chill Temperature   4.2oC   Maximum:   21.3 oC   at 15:32:30, 11/6/2009 
 Minimum:   3.6 oC   at 02:15:30, 11/7/2009 
 Mean1:   12.4 oC 
 Average2:   12.6 oC 
 Heat Index   4.2oC   Maximum:   22.9 oC   at 14:39:30, 11/6/2009 
 Minimum:   3.9 oC   at 02:15:30, 11/7/2009 
 Mean1:   13.4 oC 
 Average2:   13.2 oC 

1 The mean (in the weather industry this can be referred to as either the mean daily value or the average daily value) is actually known statistically as the midrange or midextreme value: (max(x)+min(x))/2.
2 The average given here is also known statistically as the arithmetic mean: Σxi/N where the sum is performed over the available data for the previous 24-hour period. Normally the available data is the 1-minute average (arithmetic mean of data taken once per second) for temperature, humidity, mean sea-level pressure, station pressure, solar irradiance, and dewpoint. For wind chill the 1-minute value is the minimum recorded over that period. For wind speed and heat index it is the maximum during the period.
3 The average wind direction is the vector average which incorporates both the direction and speed. It is the net direction a parcel of air would have moved if you could track it over the 1-minute period.

Click here for british units.

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