TABLE OF AVERAGE AIR QUALITY VALUES FOR SELECTED HOURS

The tables include the air quality values for a selected period limited by the hour selection. Using a form, it is possible to select the time period and set the hours for the value collection. The database of hourly averages is the data source for the calculation. Due to data volume, the time period is limited to maximum 12 months.

Using this selection, it is possible, for example, to find average afternoon temperatures for a selected time period by setting the start and end of the hour selection (e.g. by setting the numbers 12 and 18). To find the night average and extreme states, the start and end of the hour selection can be set in the reverse order (e.g. by setting the numbers 21 and 6).

Displayed Data Selection Settings
Start date of the displayed data (year-month-day)
End date of the displayed data (year-month-day)
Start of hour selection (hour number 1 to 24)
End of hour selection (hour number 1 to 24)
Display data using new selection settings

The basic table includes the minimum, average and maximum values of physical qualities specifying the state for a selected period without specific time data. This means that the maximum and minimum values are not related to the same time; each value can correspond to a different point from the entire selected time period.

ValueUnitsMinimumAverageMaximum
Temperature [°C] -1.6 11.15 29.63
Relative humidity [%] 22.58 68.06 99.98
Pressure [Pa] 95645 96912 98176
Specific humidity [g/kg s.v.] 2.11 5.73 11.73
Absolute humidity [g/m3] 2.51 6.71 13.3
Specific density [kg/m3] 1.108 1.18 1.253
Steam partial pressure [Pa] 330 883 1780
Dew point temperature [°C] -7.28 4.51 15.66
Wet thermometer temperature [°C] -2.32 7.77 16.94
Enthalpy [kJ/kg s.v.] 5.69 25.72 49.4

The value selection is performed using 725 records found in the database.

The following table shows values including the time at which they were measured.

Event descriptionEvent dateHoursValue
Maximum air temperature [°C] 2021-05-11 16 29.63
Minimum air temperature [°C] 2021-04-26 6 -1.6
Maximum atmospheric pressure [Pa] 2021-04-24 1 98176
Minimum atmospheric pressure [Pa] 2021-05-02 9 95645
Minimum relative humidity [%] 2021-04-28 17 22.58
Maximum specific humidity [g/kgs.v.] 2021-05-12 19 11.73
Maximum dew point temperature [°C] 2021-05-12 19 15.66
Maximum air enthalpy [kJ/kgs.v.] 2021-05-12 16 49.4
Number of hours where temperature higher than 25 [°C] 22
Number of hours where temperature higher than 20 [°C] 46
Number of hours where temperature lower than 0 [°C] 12
Number of hours where dew point temperature higher than 15 [°C] 3
The greatest change in temperature per 1 hour [°C] 2021-05-05 14 5.89
The greatest change in pressure per 1 hour [Pa] 2021-05-05 14 184

The graphs include measured data starting from July 2013. Therefore, it is possible to enter End date of the displayed from 6.7.2013 up to the present date in the setting form. If a different date or the wrong date format is entered, the start and end of the permissible period will be displayed.