Summary of the past 24 hours from the unofficial station on the roof of the Eyring Science Center on the campus of Brigham Young University in Provo, Utah, USA.

Sun, Jul 22, 2018 10:39:00 AM
 Temperature   Maximum:   38.1 °C   at 17:25:00, 7/21/2018 
 Minimum:   17.7 °C   at 06:47:00, 7/22/2018 
 Mean¹:   27.9 °C 
 Average²:   25.9 °C 
 Relative Humidity   Maximum:   78.8%   at 19:42:00, 7/21/2018 
 Minimum:   19.7%   at 18:30:00, 7/21/2018 
 Mean¹:   49.2% 
 Average²:   43.4% 
 Dewpoint   Maximum:   15.1 °C   at 19:42:00, 7/21/2018 
 Minimum:   5.1 °C   at 19:18:00, 7/21/2018 
 Mean¹:   10.1 °C 
 Average²:   10.6 °C 
 Mean Sea Level Pressure   Maximum:   101.5 kPa   at 09:59:00, 7/22/2018 
 Minimum:   100.3 kPa   at 16:09:00, 7/21/2018 
 Mean¹:   100.9 kPa 
 Average²:   100.7 kPa 
Station Pressure   Maximum:   86.3 kPa   at 09:59:00, 7/22/2018 
 Minimum:   85.3 kPa   at 20:01:00, 7/21/2018 
 Mean¹:   85.8 kPa 
 Average²:   85.7 kPa 
 Wind Speed   Maximum:   13.6 m/s from S (185°)   at 19:30:00, 7/21/2018 
 Average²:   1.9 m/s 
 Wind Direction   Average³:   from SE (140°) 
 Solar Irradiance   Maximum:   1547 W/m²   at 12:20:00, 7/21/2018 
 Average²:   451 W/m² 
 Rainfall this month   9.7 mm 
 Rainfall since midnight   0.0 mm 
 Past 24 hours   6.3 mm 
 Maximum rate   60.96 mm/hour   at 19:37:30, 7/21/2018 
 Wind-Chill Temperature   Maximum:   40.4 °C   at 16:32:00, 7/21/2018 
 Minimum:   17.6 °C   at 06:46:00, 7/22/2018 
 Mean¹:   29.0 °C 
 Average²:   26.0 °C 
 Heat Index   Maximum:   37.0 °C   at 17:25:00, 7/21/2018 
 Minimum:   17.7 °C   at 06:47:00, 7/22/2018 
 Mean¹:   27.4 °C 
 Average²:   25.7 °C 

Click here for British Imperial units.

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¹ The mean is the midrange or midextreme value: (max(x)+min(x))/2. In the weather industry this can be referred to as either the mean daily value or the average daily value.
² The average given here is 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 insolation, 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 24-hour period.