diff --git a/sensors/main.py b/sensors/main.py
index a846394..d900959 100644
--- a/sensors/main.py
+++ b/sensors/main.py
@@ -37,7 +37,7 @@ def cfg():
         'SLUSH_TEMP_THRESHOLD':   float( os.getenv('SLUSH_TEMP_THRESHOLD',        '0.0')),
         'SNOW_STRENGTH_MIN':      int(   os.getenv('SNOW_STRENGTH_MIN',           '700')),
         'SEISMIC_NOISE_FLOOR':    float( os.getenv('SEISMIC_NOISE_FLOOR',         '0.02')),
-        'TEMP_CALIBRATION':       float( os.getenv('TEMP_CALIBRATION',            '7.5')),
+        'TEMP_CALIBRATION':       float( os.getenv('TEMP_CALIBRATION',            '-7.55')),
         'CLOUD_BUCKET_SIZE':      int(   os.getenv('CLOUD_BUCKET_SIZE',           '5')),
         'CLOUD_HISTORY':          int(   os.getenv('CLOUD_HISTORY',               '20')),
         'CLOUD_BASELINE_PCT':     float( os.getenv('CLOUD_BASELINE_PCT',          '0.9')),
@@ -178,7 +178,7 @@ def read_bme(c, sensor, alt_m=None):
         p_rate, p_label = get_pressure_trend(c['PRESSURE_TREND_WINDOW'])
         dp = round(t - (100-rh)/5.0, 2)
         write(c, 'environment', {
-            'temperature':            round(t - c['TEMP_CALIBRATION'], 2),
+            'temperature':            round(t + c['TEMP_CALIBRATION'], 2),
             'humidity':               round(rh, 2),
             'dew_point':              dp,
             'pressure_hpa':           round(p, 2),