HAsmartirrigation: OWM precipitation from daily is not consistent with assumptions

What happened?

OWM precipitation from daily is not consistent with our assumptions / requirements for when people use a sensor. We expected it to be a daily forecast but it varies wildly during the day. Precipitation in our integration is defined as: daily[“rain”] + daily[“snow”]. I’d expect it to either stay 0 or increase when the day progresses, but it doesn’t:

"data": [
          {
            "Windspeed": 0.0,
            "Pressure": 996.2924284049999,
            "Humidity": 100.0,
            "Temperature": 12.527777777777775,
            "Dewpoint": 10.82,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T00:34:39.708540"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 996.2924284049999,
            "Humidity": 100.0,
            "Temperature": 12.449999999999998,
            "Dewpoint": 11.35,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T01:34:40.198560"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 996.2924284049999,
            "Humidity": 100.0,
            "Temperature": 12.42222222222222,
            "Dewpoint": 11.22,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T02:34:40.211957"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 996.2924284049999,
            "Humidity": 100.0,
            "Temperature": 12.111111111111109,
            "Dewpoint": 10.65,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T03:34:40.203154"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 996.981904134,
            "Humidity": 100.0,
            "Temperature": 11.922222222222222,
            "Dewpoint": 10.37,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T04:34:40.604191"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 996.981904134,
            "Humidity": 100.0,
            "Temperature": 11.61111111111111,
            "Dewpoint": 9.76,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T05:34:40.331183"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 997.671379863,
            "Humidity": 100.0,
            "Temperature": 11.261111111111113,
            "Dewpoint": 9.51,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T06:34:40.212081"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 997.671379863,
            "Humidity": 100.0,
            "Temperature": 11.172222222222222,
            "Dewpoint": 9.55,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T07:34:40.229681"
          },
          {
            "Windspeed": 0.0,
            "Pressure": 999.73980705,
            "Humidity": 100.0,
            "Temperature": 12.177777777777779,
            "Dewpoint": 9.74,
            "Precipitation": 0.0,
            "retrieved": "2023-09-26T08:34:40.255309"
          },
          {
            "Windspeed": 0.6656764568994703,
            "Pressure": 1014.0000058602027,
            "Humidity": 90,
            "Temperature": 11.83,
            "Dewpoint": 10.24,
            "Precipitation": 6.44,
            "retrieved": "2023-09-26T09:10:40.109577"
          },
          {
            "Windspeed": 0.6656764568994703,
            "Pressure": 1014.0000058602027,
            "Humidity": 88,
            "Temperature": 13.56,
            "Dewpoint": 11.61,
            "Precipitation": 6.33,
            "retrieved": "2023-09-26T10:10:40.002459"
          },
          {
            "Windspeed": 1.002254440725045,
            "Pressure": 1014.0000058602027,
            "Humidity": 82,
            "Temperature": 14.79,
            "Dewpoint": 11.75,
            "Precipitation": 8.1,
            "retrieved": "2023-09-26T11:10:39.907213"
          },
          {
            "Windspeed": 1.002254440725045,
            "Pressure": 1015.000005865982,
            "Humidity": 82,
            "Temperature": 14.91,
            "Dewpoint": 11.87,
            "Precipitation": 8.33,
            "retrieved": "2023-09-26T12:10:40.013252"
          },
          {
            "Windspeed": 1.675410408376195,
            "Pressure": 1015.000005865982,
            "Humidity": 77,
            "Temperature": 14.83,
            "Dewpoint": 10.84,
            "Precipitation": 9.94,
            "retrieved": "2023-09-26T13:10:39.946402"
          },
          {
            "Windspeed": 1.675410408376195,
            "Pressure": 1016.0000058717612,
            "Humidity": 85,
            "Temperature": 12.11,
            "Dewpoint": 9.67,
            "Precipitation": 12.62,
            "retrieved": "2023-09-26T14:10:39.921761"
          },
          {
            "Windspeed": 1.2939553600405433,
            "Pressure": 1015.000005865982,
            "Humidity": 81,
            "Temperature": 12.62,
            "Dewpoint": 9.45,
            "Precipitation": 7.54,
            "retrieved": "2023-09-26T15:10:39.889807"
          },
          {
            "Windspeed": 1.002254440725045,
            "Pressure": 1016.0000058717612,
            "Humidity": 87,
            "Temperature": 12.81,
            "Dewpoint": 10.7,
            "Precipitation": 6.46,
            "retrieved": "2023-09-26T16:10:39.834069"
          }

The OWM API does not seem to provide anything else, although there is a hourly precipitation (hourly.rain.1h and hourly.snow.1h in the API. That could work but only if the user would update every hour, which we don’t really control. Default aggregation for precipitation in our integration is “last”, which would work if the assumption was true, which it clearly isn’t. Average is maybe a better alternative but if you look at the above I am concerned the number of 0s drag it down too much.

Thoughts @gatonero?