diff --git a/src/phases/weather-effect-phase.ts b/src/phases/weather-effect-phase.ts
index 73de44389d0..b48ee342780 100644
--- a/src/phases/weather-effect-phase.ts
+++ b/src/phases/weather-effect-phase.ts
@@ -44,7 +44,7 @@ export class WeatherEffectPhase extends CommonAnimPhase {
             return;
           }
 
-          const damage = Math.ceil(pokemon.getMaxHp() / 16);
+          const damage = Utils.toDmgValue(pokemon.getMaxHp() / 16);
 
           this.scene.queueMessage(getWeatherDamageMessage(this.weather?.weatherType!, pokemon)!); // TODO: are those bangs correct?
           pokemon.damageAndUpdate(damage, HitResult.EFFECTIVE, false, false, true);
diff --git a/src/test/arena/weather_hail.test.ts b/src/test/arena/weather_hail.test.ts
index 31d20be2ded..8a1d660912d 100644
--- a/src/test/arena/weather_hail.test.ts
+++ b/src/test/arena/weather_hail.test.ts
@@ -39,7 +39,7 @@ describe("Weather - Hail", () => {
     await game.phaseInterceptor.to("TurnEndPhase");
 
     game.scene.getField(true).forEach(pokemon => {
-      expect(pokemon.hp).toBeLessThan(pokemon.getMaxHp() - Math.floor(pokemon.getMaxHp() / 16));
+      expect(pokemon.hp).toBe(pokemon.getMaxHp() - Math.max(Math.floor(pokemon.getMaxHp() / 16), 1));
     });
   });
 
@@ -56,6 +56,6 @@ describe("Weather - Hail", () => {
     const enemyPokemon = game.scene.getEnemyPokemon()!;
 
     expect(playerPokemon.hp).toBe(playerPokemon.getMaxHp());
-    expect(enemyPokemon.hp).toBeLessThan(enemyPokemon.getMaxHp() - Math.floor(enemyPokemon.getMaxHp() / 16));
+    expect(enemyPokemon.hp).toBe(enemyPokemon.getMaxHp() - Math.max(Math.floor(enemyPokemon.getMaxHp() / 16), 1));
   });
 });
diff --git a/src/test/arena/weather_sandstorm.test.ts b/src/test/arena/weather_sandstorm.test.ts
index 91188de6985..0b64266f8c0 100644
--- a/src/test/arena/weather_sandstorm.test.ts
+++ b/src/test/arena/weather_sandstorm.test.ts
@@ -37,7 +37,7 @@ describe("Weather - Sandstorm", () => {
     await game.phaseInterceptor.to("TurnEndPhase");
 
     game.scene.getField(true).forEach(pokemon => {
-      expect(pokemon.hp).toBeLessThan(pokemon.getMaxHp() - Math.floor(pokemon.getMaxHp() / 16));
+      expect(pokemon.hp).toBe(pokemon.getMaxHp() - Math.max(Math.floor(pokemon.getMaxHp() / 16), 1));
     });
   });
 
@@ -53,6 +53,6 @@ describe("Weather - Sandstorm", () => {
     const enemyPokemon = game.scene.getEnemyPokemon()!;
 
     expect(playerPokemon.hp).toBe(playerPokemon.getMaxHp());
-    expect(enemyPokemon.hp).toBeLessThan(enemyPokemon.getMaxHp() - Math.floor(enemyPokemon.getMaxHp() / 16));
+    expect(enemyPokemon.hp).toBe(enemyPokemon.getMaxHp() - Math.max(Math.floor(enemyPokemon.getMaxHp() / 16), 1));
   });
 });