diff --git a/driver/src/main.rs b/driver/src/main.rs
index ee13265..60b8969 100644
--- a/driver/src/main.rs
+++ b/driver/src/main.rs
@@ -59,7 +59,7 @@ struct TinyWetterReading {
 
 impl TinyWetterReading {
     fn temperature(&self) -> f32 {
-        (self.temperature_bmp280 + self.temperature_si7021) / 2. - 1.
+        (self.temperature_bmp280 + self.temperature_si7021) / 2. - 1.5
     }
 
     fn sea_level_preassure(&self, altitude: f32) -> f32 {