diff --git a/homeassistant/components/airnow/coordinator.py b/homeassistant/components/airnow/coordinator.py
index 1e73bc7551e..12085f1188e 100644
--- a/homeassistant/components/airnow/coordinator.py
+++ b/homeassistant/components/airnow/coordinator.py
@@ -71,7 +71,7 @@ class AirNowDataUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
 
     async def _async_update_data(self) -> dict[str, Any]:
         """Update data via library."""
-        data = {}
+        data: dict[str, Any] = {}
         try:
             obs = await self.airnow.observations.latLong(
                 self.latitude,
diff --git a/homeassistant/components/airnow/manifest.json b/homeassistant/components/airnow/manifest.json
index 28dada485b2..41df51715fc 100644
--- a/homeassistant/components/airnow/manifest.json
+++ b/homeassistant/components/airnow/manifest.json
@@ -6,5 +6,5 @@
   "documentation": "https://www.home-assistant.io/integrations/airnow",
   "iot_class": "cloud_polling",
   "loggers": ["pyairnow"],
-  "requirements": ["pyairnow==1.2.1"]
+  "requirements": ["pyairnow==1.3.1"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index b9712860354..3fa6c315b15 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1832,7 +1832,7 @@ pyaehw4a1==0.3.9
 pyaftership==21.11.0
 
 # homeassistant.components.airnow
-pyairnow==1.2.1
+pyairnow==1.3.1
 
 # homeassistant.components.airvisual
 # homeassistant.components.airvisual_pro
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index d2055bba4ef..4319f4e42a0 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1534,7 +1534,7 @@ pyaehw4a1==0.3.9
 pyaftership==21.11.0
 
 # homeassistant.components.airnow
-pyairnow==1.2.1
+pyairnow==1.3.1
 
 # homeassistant.components.airvisual
 # homeassistant.components.airvisual_pro
diff --git a/tests/components/airnow/snapshots/test_diagnostics.ambr b/tests/components/airnow/snapshots/test_diagnostics.ambr
index 73ba6a7123f..d711f9c2eba 100644
--- a/tests/components/airnow/snapshots/test_diagnostics.ambr
+++ b/tests/components/airnow/snapshots/test_diagnostics.ambr
@@ -12,7 +12,7 @@
       'Longitude': '**REDACTED**',
       'O3': 0.048,
       'PM10': 12,
-      'PM2.5': 8.9,
+      'PM2.5': 6.7,
       'Pollutant': 'O3',
       'ReportingArea': '**REDACTED**',
       'StateCode': '**REDACTED**',