diff --git a/esphome/components/whynter/whynter.cpp b/esphome/components/whynter/whynter.cpp
index b8a8db4d7c..f5f304aa17 100644
--- a/esphome/components/whynter/whynter.cpp
+++ b/esphome/components/whynter/whynter.cpp
@@ -84,8 +84,8 @@ void Whynter::transmit_state() {
 
   if (fahrenheit_) {
     remote_state |= UNIT_MASK;
-    uint8_t temp =
-        (uint8_t) clamp<float>(esphome::celsius_to_fahrenheit(this->target_temperature), TEMP_MIN_F, TEMP_MAX_F);
+    uint8_t temp = (uint8_t) roundf(
+        clamp<float>(esphome::celsius_to_fahrenheit(this->target_temperature), TEMP_MIN_F, TEMP_MAX_F));
     temp = esphome::reverse_bits(temp);
     remote_state |= temp;
   } else {