Imrpove rain notification automation

automations/weather.yaml

@@ -17,7 +17,17 @@
       message: >
         {% if is_state('binary_sensor.weather_raining', 'on') %}
           Current rate: {{ states('sensor.gw1100a_rain_rate') }} mm/m2.
-          Last rain was {{ trigger.from_state.state / 60 }} hours ago.
+          Last rain was {{ (trigger.from_state.state | int / 60) | round }} hours ago.
         {% else %}
           The rain has stopped after {{ trigger.from_state.state }} minutes.
         {% endif %}
+
+- alias: Weather - last_rain_not_rain_change - Update
+  trigger:
+    platform: state
+    entity_id: binary_sensor.weather_raining
+  action:
+    service: input_datetime.set_datetime
+    entity_id: input_datetime.last_rain_not_rain_change
+    data:
+      datetime: "{{ now().strftime('%Y-%m-%d %H:%M:%S') }}"

binary_sensors/weather.yaml

@@ -4,4 +4,4 @@
   sensors:
     weather_raining:
       value_template: "{{ states('sensor.gw1100a_rain_rate') | float > 0 }}"
-      delay_off: 00:02:00
+      delay_off: 00:10:00

input_datetimes/weather.yaml

@@ -0,0 +1,5 @@
+---
+
+last_rain_not_rain_change:
+  has_date: true
+  has_time: true

sensors/weather.yaml

@@ -5,6 +5,6 @@
     weather_rain_not_rain_duration:
       unit_of_measurement: "min"
       value_template: >
-        {% set rain_start = states.binary_sensor.weather_raining.last_changed %}
+        {% set rain_start = states('input_datetime.last_rain_not_rain_change') | as_datetime | as_local %}
         {% set rain_end = now() %}
         {{ ((rain_end - rain_start).total_seconds() / 60) | round(0) }}