Units¶
WeeWX offers three different unit systems:
| Name | Encoded value | Description |
|---|---|---|
| US | 0x01 | U.S. Customary |
| METRICWX | 0x11 | Metric, with rain related measurements in mm and speeds in m/s |
| METRIC | 0x10 | Metric, with rain related measurements in cm and speeds in km/hr |
The table below lists all the unit groups, their members, which units are options for the group, and what the defaults are for each standard unit system.
| Group | Members | Unit options | US | METRICWX | METRIC |
|---|---|---|---|---|---|
| group_altitude | altitude cloudbase |
foot meter |
foot | meter | meter |
| group_amp | amp | amp | amp | amp | |
| group_angle | degree_angle radian |
degree_angle | degree_angle | degree_angle | |
| group_boolean | boolean | boolean | boolean | boolean | |
| group_concentration | no2 pm1_0 pm2_5 pm10_0 |
microgram_per_meter_cubed | microgram_per_meter_cubed | microgram_per_meter_cubed | microgram_per_meter_cubed |
| group_count | leafWet1 leafWet2 lightning_disturber_count lightning_noise_count lightning_strike_count |
count | count | count | count |
| group_data | byte bit |
byte | byte | byte | |
| group_db | noise | dB | dB | dB | dB |
| group_deltatime | daySunshineDur rainDur sunshineDurDoc |
second minute hour day |
second | second | second |
| group_degree_day | cooldeg heatdeg growdeg |
degree_F_day degree_C_day |
degree_F_day | degree_C_day | degree_C_day |
| group_direction | gustdir vecdir windDir windGustDir |
degree_compass | degree_compass | degree_compass | degree_compass |
| group_distance | windrun lightning_distance |
mile km |
mile | km | km |
| group_energy | kilowatt_hour mega_joule watt_hour watt_second |
watt_hour | watt_hour | watt_hour | |
| group_energy2 | kilowatt_hour watt_hour watt_second |
watt_second | watt_second | watt_second | |
| group_fraction | co co2 nh3 o3 pb so2 |
ppm | ppm | ppm | ppm |
| group_frequency | hertz | hertz | hertz | hertz | |
| group_illuminance | illuminance | lux | lux | lux | lux |
| group_interval | interval | minute | minute | minute | minute |
| group_length | inch cm |
inch | cm | cm | |
| group_moisture | soilMoist1 soilMoist2 soilMoist3 soilMoist4 |
centibar | centibar | centibar | centibar |
| group_percent |
cloudcover extraHumid1 extraHumid2 inHumidity outHumidity pop rxCheckPercent snowMoisture |
percent | percent | percent | percent |
| group_power | kilowatt watt |
watt | watt | watt | |
| group_pressure |
barometer altimeter pressure |
inHg mbar hPa kPa |
inHg | mbar | mbar |
| group_pressurerate |
barometerRate altimeterRate pressureRate |
inHg_per_hour mbar_per_hour hPa_per_hour kPa_per_hour |
inHg_per_hour | mbar_per_hour | mbar_per_hour |
| group_radiation | maxSolarRad radiation |
watt_per_meter_squared | watt_per_meter_squared | watt_per_meter_squared | watt_per_meter_squared |
| group_rain | rain ET hail snowDepth snowRate |
inch cm mm |
inch | mm | cm |
| group_rainrate | rainRate hailRate |
inch_per_hour cm_per_hour mm_per_hour |
inch_per_hour | mm_per_hour | cm_per_hour |
| group_speed | wind windGust windSpeed windgustvec windvec |
mile_per_hour km_per_hour knot meter_per_second beaufort |
mile_per_hour | meter_per_second | km_per_hour |
| group_speed2 | rms vecavg |
mile_per_hour2 km_per_hour2 knot2 meter_per_second2 |
mile_per_hour2 | meter_per_second2 | km_per_hour2 |
| group_temperature | appTemp dewpoint extraTemp1 extraTemp2 extraTemp3 heatindex heatingTemp humidex inTemp leafTemp1 leafTemp2 outTemp soilTemp1 soilTemp2 soilTemp3 soilTemp4 windchill THSW |
degree_C degree_F degree_E degree_K |
degree_F | degree_C | degree_C |
| group_time | dateTime | unix_epoch dublin_jd |
unix_epoch | unix_epoch | unix_epoch |
| group_uv | UV | uv_index | uv_index | uv_index | uv_index |
| group_volt | consBatteryVoltage heatingVoltage referenceVoltage supplyVoltage |
volt | volt | volt | volt |
| group_volume | cubic_foot gallon liter |
gallon | liter | liter | |
| group_NONE | NONE | NONE | NONE | NONE | NONE |