@lightmastertech For now, we will adopt the rules from Citizen Weather Observer Program (CWOP).

Temperature

To reduce small variations in second to second measurements that are attributed to sensor sampling “noise” and not representative of ambient temperature, the following time sampling intervals for measurements are suggested:

• Temperature: latest 5 minute average
• Dew Point: latest 1 minute average

Wind

Mean Wind Speed and Direction: 2-minute mean of speed and direction sampled before the observation valid time sampled from high-resolution data (minimum: 5 second instrument polling).
Gust: Maximum instantaneous wind value observed in the 10 minutes before the observation valid time sampled from full resolution data (minimum: 5 second instrument polling).

Pressure

Reporting frequency: 1-minute updates derived from the minimum reported pressure value observed in the past minute. Typically, basis for the 1-minute minimum pressure reports are from a series of ten 6-second interval instantaneous pressure measurements.

Okay, I'll update my Meteobridge to use those averages. Thanks.

Temperature

To reduce small variations in second to second measurements that are attributed to sensor sampling “noise” and not representative of ambient temperature, the following time sampling intervals for measurements are suggested:

• Temperature: latest 5 minute average
• Dew Point: latest 1 minute average

Wind

Mean Wind Speed and Direction: 2-minute mean of speed and direction sampled before the observation valid time sampled from high-resolution data (minimum: 5 second instrument polling).
Gust: Maximum instantaneous wind value observed in the 10 minutes before the observation valid time sampled from full resolution data (minimum: 5 second instrument polling).

Pressure

Reporting frequency: 1-minute updates derived from the minimum reported pressure value observed in the past minute. Typically, basis for the 1-minute minimum pressure reports are from a series of ten 6-second interval instantaneous pressure measurements.

According to https://library.wmo.int/doc_num.php?explnum_id=3425

"The wind reported should be the mean over the 10 min preceding the observation.
If during this period there has been a marked discontinuity lasting at least 2 min,
the mean values should be assessed over the period after the discontinuity.
A marked discontinuity occurs when there is a wind direction
change of 30° or more with a wind speed of 10 kt (5 m/s) or more,
before or after the change, or a wind speed change of 10 kt (5 m/s) or more.

The averaging period for measuring variations from the mean wind speed (gusts)
should be 3 sec."