With multi-information display

Turn the ignition switch to ON (II).
Push and hold the INFORMATION button for at least 3 seconds to enter the customizing mode.
While in the customizing mode, select the "CHG SETTING", and enter the "METER SETUP." Then select the "ADJUST OUTSIDE TEMP. DISPLAY", and calibrate the value with the SEL/RESET switch and the INFORMATION switch.

Fig 1: Calibration Of Adjust Outside Temp Display
Courtesy of AMERICAN HONDA MOTOR CO., INC.
When the desired correction value appears on the display, release the button, and the recalibrated outside air temperature will be displayed.
NOTE: The recalibration temperature is not the value the sensor sees. Therefore the temperature can only be adjusted ±5 ° from sensors.

Example:

Incorrect value = 68°F (20°C)

Desired correction value Correct value = +2°F (+1°C) = 70°F (21°C)

Desired correction value = -2°F (-1°C) Correct value = 66°F (19°C)

NOTE: To recalibrate the display to the true temperature, remove the outside air temperature sensor (A), but leave it connected. Submerge the sensor and a thermometer (B) in a container of ice water (C). Select the calibration mode as described above, then recalibrate the display to the true temperature.

Fig 2: Identifying Outside Air Temperature Sensor Submerged In Ice With Thermometer
Courtesy of AMERICAN HONDA MOTOR CO., INC.
The snowmark is displayed when the temperature is 38°F (4°C) or less the first time you turn the ignition switch to ON (II).

Fig 3: Display - Low Outside Temperature
Courtesy of AMERICAN HONDA MOTOR CO., INC.