Tools for getting historical weather information and forecasts from wunderground.com. Historical weather and forecast data includes, but is not limited to, temperature, humidity, windchill, wind speed, dew point, heat index. Additionally, the weather underground weather API also includes information on sunrise/sunset, tidal conditions, satellite/webcam imagery, weather alerts, hurricane alerts and historical high/low temperatures.
This is an R interface to weather underground's API.
In order to use this library please register for an API key. The free-tier should be sufficient if you aren't calling the API more than a 500 times per day. Please note that the free tier also limits requests to 10 per minute. If you are grabbing weather for a large date range using
history_range then by default
limit = 10 will limit the calls to a maximum of 10 per minute. This package
has functions that follow the online api.
This package is officially on CRAN; install using
To install the latest version please use
devtools. If you don't have devtools install using
install.packages("devtools"). Afterwards install
rwunderground using devtools:
Once you have your API key as indicated above you can set the key in R using:
rwunderground::set_api_key("YOUR KEY"). You only have to do this once per R session. Alternatively you can save the key in your local .Renviron file by adding the line
WUNDERGROUNDID = 'your key here'.
For any of the API functions you must first specify a location -- the first argument of all the API functions is a location. Locations can be specified by the airport code, zip code, personal weather station ID or simply by specifying state and city (if in US) or country and city (if outside US). The
set_location function will validate locations and format things correctly or you can use a (correctly formatted) string.
Setting the location to Honolulu, HI:
set_location(territory = "Hawaii", city = "Honolulu").
Setting the location to Mombasa, Kenya:
set_location(territory = "Kenya", city = "Mombasa").
Setting the location to San Diego, California:
set_location(territory = "California", city = "San Diego")
As alluded above,
set_location will attempt to validate and make sure the locations are formatted correctly. If you have trust in your own geography and spelling skills then you can simple replace the
set_location function with a string formatted as
"territory/city" such as:
Locations can be specified by airport codes.
Setting the location to Seattle/Tacoma airport:
set_location(airport_code = "SEA")
If you don't know the airport code you can look them up using
lookup_airport("seattle"). This will lookup IATA and ICAO airport codes.
set_location(zip_code = "96813")
set_location(lat_long = "50,-100")
Note that coordinates should be comma separated.
If no argument is provided to set_location then by default the nearest weather station will be used. You can also specify location based on lat/lon or personal weather station ID.
Note: by default units are in imperial (temperature is F, windspeed in MPH etc.) -- sorry rest of the world! To use metric, you can set
use_metric = TRUE for many of the functions.
history_range: weather history functions
forecast10day: daily summary forecasts
hourly10day: hourly forecasts
planner: Historical weather summary for date range
alerts: Weather alerts
almanac: historical weather records for current date
astronomy: sunrise/sunset and moonrise/moonset
conditions: current weather conditions
geolookup: weather station lookup
current_hurricane: current hurricane information
satellite: satellite image URLs
rawtide: tide forecasts
webcam: live webcam image URLS
yesterday: historical weather information for yesterday
lookup_airport: Look up airport codes if you plan on looking up weather data using airport locations.
After a location is set, weather history is available using
To request the weather for Honolulu, HI on January 31, 2015:
history(set_location(territory = "Hawaii", city = "Honolulu"), date = 20150131)
Note that dates must be in YYYYMMDD.
Forecast weather data is available using
forecast10day. Hourly forecasts are also available using
hourly10day. The forecast functions do a daily summary forecast and the hourly functions do hourly forecasts.
To get the 10 day forecast and 10 day hourly forecast for Honolulu, Hawaii:
forecast10day(set_location(territory = "Hawaii", city = "Honolulu"))
hourly10day(set_location(territory = "Hawaii", city = "Honolulu"))
Note that dates for this must be in MMDD form:
planner(set_location(territory = "IR", city = "Tehran"), start_date = "0101", end_date = "0131")
Tide high/low forecasts are available using
tide and hourly tide forecasts available using
To get the high/low tide information for Honolulu, Hawaii:
tide(set_location(territory = "Hawaii", city = "Honolulu"))
rawtide(set_location(territory = "Hawaii", city = "Honolulu"))
Weather alerts are available as plain text.
Weather Alerts for Honolulu, Hawaii:
alerts(set_location(territory = "Hawaii", city = "Honolulu"))