Without multi-information display

Turn the ignition switch to ON (II).
Select the odometer/trip A or odometer/trip B display.
Select the outside air temperature display and press and hold the SEL/RESET switch for 10 seconds. While you continue to hold the button, the display scrolls through temperature settings from +5°F to -5°F (or +3°C to -3°C) as shown.

Fig 1: Display - Temperature Settings
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 is displayed.
Each time a desired correction value is entered, it replaces the previous value.

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 = +2°F (+1°C)

Correct value = 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.