diff --git a/include/field_weather.h b/include/field_weather.h
index 48118c9a69..6968649831 100644
--- a/include/field_weather.h
+++ b/include/field_weather.h
@@ -50,8 +50,8 @@ struct Weather
     u8 fadeScreenCounter;
     bool8 readyForInit;
     u8 taskId;
-    u8 unknown_6CA;
-    u8 unknown_6CB;
+    u8 fadeInFirstFrame;
+    u8 fadeInTimer;
     u16 initStep;
     u16 finishStep;
     u8 currWeather;
@@ -71,7 +71,7 @@ struct Weather
     u8 cloudSpritesCreated;
     // Snow
     u16 snowflakeVisibleCounter;
-    u16 unknown_6E2;
+    u16 snowflakeTimer;
     u8 snowflakeSpriteCount;
     u8 targetSnowflakeSpriteCount;
     // Thunderstorm
@@ -90,7 +90,7 @@ struct Weather
     u8 fogHSpritesCreated;
     // Ash
     u16 ashBaseSpritesX;
-    u16 unknown_6FE;
+    u16 ashUnused;
     u8 ashSpritesCreated;
     // Sandstorm
     u32 sandstormXOffset;
@@ -152,7 +152,6 @@ void FadeScreen(u8 mode, s8 delay);
 bool8 IsWeatherNotFadingIn(void);
 void UpdateSpritePaletteWithWeather(u8 spritePaletteIndex);
 void ApplyWeatherGammaShiftToPal(u8 paletteIndex);
-u8 sub_80ABF20(void);
 void LoadCustomWeatherSpritePalette(const u16 *palette);
 void ResetDroughtWeatherPaletteLoading(void);
 bool8 LoadDroughtWeatherPalettes(void);
diff --git a/src/field_weather.c b/src/field_weather.c
index 67051377c4..6fc1d331a3 100644
--- a/src/field_weather.c
+++ b/src/field_weather.c
@@ -365,8 +365,8 @@ static void UpdateWeatherGammaShift(void)
 
 static void FadeInScreenWithWeather(void)
 {
-    if (++gWeatherPtr->unknown_6CB > 1)
-        gWeatherPtr->unknown_6CA = 0;
+    if (++gWeatherPtr->fadeInTimer > 1)
+        gWeatherPtr->fadeInFirstFrame = FALSE;
 
     switch (gWeatherPtr->currWeather)
     {
@@ -793,8 +793,8 @@ void FadeScreen(u8 mode, s8 delay)
             BeginNormalPaletteFade(PALETTES_ALL, delay, 16, 0, fadeColor);
 
         gWeatherPtr->palProcessingState = WEATHER_PAL_STATE_SCREEN_FADING_IN;
-        gWeatherPtr->unknown_6CA = 1;
-        gWeatherPtr->unknown_6CB = 0;
+        gWeatherPtr->fadeInFirstFrame = TRUE;
+        gWeatherPtr->fadeInTimer = 0;
         Weather_SetBlendCoeffs(gWeatherPtr->currBlendEVA, gWeatherPtr->currBlendEVB);
         gWeatherPtr->readyForInit = TRUE;
     }
@@ -813,7 +813,7 @@ void UpdateSpritePaletteWithWeather(u8 spritePaletteIndex)
     switch (gWeatherPtr->palProcessingState)
     {
     case WEATHER_PAL_STATE_SCREEN_FADING_IN:
-        if (gWeatherPtr->unknown_6CA != 0)
+        if (gWeatherPtr->fadeInFirstFrame)
         {
             if (gWeatherPtr->currWeather == WEATHER_FOG_HORIZONTAL)
                 MarkFogSpritePalToLighten(paletteIndex);
@@ -848,12 +848,13 @@ void ApplyWeatherGammaShiftToPal(u8 paletteIndex)
     ApplyGammaShift(paletteIndex, 1, gWeatherPtr->gammaIndex);
 }
 
-u8 sub_80ABF20(void)
+// Unused
+static bool8 IsFirstFrameOfWeatherFadeIn(void)
 {
     if (gWeatherPtr->palProcessingState == WEATHER_PAL_STATE_SCREEN_FADING_IN)
-        return gWeatherPtr->unknown_6CA;
+        return gWeatherPtr->fadeInFirstFrame;
     else
-        return 0;
+        return FALSE;
 }
 
 void LoadCustomWeatherSpritePalette(const u16 *palette)
diff --git a/src/field_weather_effect.c b/src/field_weather_effect.c
index 1069bc9a29..e0103c5a33 100644
--- a/src/field_weather_effect.c
+++ b/src/field_weather_effect.c
@@ -941,13 +941,14 @@ static void InitSnowflakeSpriteMovement(struct Sprite *sprite)
 
 static void WaitSnowflakeSprite(struct Sprite *sprite)
 {
-    if (gWeatherPtr->unknown_6E2 > 18)
+    // Timer is never incremented
+    if (gWeatherPtr->snowflakeTimer > 18)
     {
         sprite->invisible = FALSE;
         sprite->callback = UpdateSnowflakeSprite;
         sprite->pos1.y = 250 - (gSpriteCoordOffsetY + sprite->centerToCornerVecY);
         sprite->tPosY = sprite->pos1.y * 128;
-        gWeatherPtr->unknown_6E2 = 0;
+        gWeatherPtr->snowflakeTimer = 0;
     }
 }
 
@@ -1519,7 +1520,7 @@ void Ash_InitVars(void)
     gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->gammaTargetIndex = 0;
     gWeatherPtr->gammaStepDelay = 20;
-    gWeatherPtr->unknown_6FE = 20;
+    gWeatherPtr->ashUnused = 20; // Never read
     if (!gWeatherPtr->ashSpritesCreated)
     {
         Weather_SetBlendCoeffs(0, 16);