weather widget

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diff --git a/weather-widget/README.md b/weather-widget/README.md
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+# Weather widget
+
+![Weather Widget](./weather-widget.png)
+
+Note that widget uses the Arc icon theme, so it should be [installed](https://github.com/horst3180/arc-icon-theme#installation) first under **/usr/share/icons/Arc/** folder.
+
+## Installation
+
+ - install lua socket
+```bash
+$ sudo apt-get install luasockets
+```
+
+ - download json parser for lua: https://github.com/rxi/json.lua
+ - get Open Weather Map app id here: https://openweathermap.org/appid
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diff --git a/weather-widget/weather-widget.png b/weather-widget/weather-widget.png
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+++ b/weather-widget/weather-widget.png
diff --git a/weather-widget/weather.lua b/weather-widget/weather.lua
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+local wibox = require("wibox")
+local http = require("socket.http")
+local json = require("json")
+local naughty = require("naughty")
+
+local city = "Montreal,ca"
+local open_map_key = "<openWeatherMap api key>"
+local path_to_icons = "/usr/share/icons/Arc/status/symbolic/"
+
+local icon_widget = wibox.widget {
+    {
+        id = "icon",
+        resize = false,
+        widget = wibox.widget.imagebox,
+    },
+    layout = wibox.container.margin(brightness_icon, 0, 0, 3),
+    set_image = function(self, path)
+        self.icon.image = path
+    end,
+}
+
+local temp_widget = wibox.widget{
+    font = "Play 9",
+    widget = wibox.widget.textbox,
+}
+
+weather_widget = wibox.widget {
+    icon_widget,
+    temp_widget,
+    layout = wibox.layout.fixed.horizontal,
+}
+
+-- helps to map openWeatherMap icons to Arc icons
+local icon_map = {
+    ["01d"] = "weather-clear-symbolic.svg",
+    ["02d"] = "weather-few-clouds-symbolic.svg",
+    ["03d"] = "weather-clouds-symbolic.svg",
+    ["04d"] = "weather-overcast-symbolic.svg",
+    ["09d"] = "weather-showers-scattered-symbolic.svg",
+    ["10d"] = "weather-showers-symbolic.svg",
+    ["11d"] = "weather-storm-symbolic.svg",
+    ["13d"] = "weather-snow-symbolic.svg",
+    ["50d"] = "weather-fog-symbolic.svg",
+    ["01n"] = "weather-clear-night-symbolic.svg",
+    ["02n"] = "weather-few-clouds-night-symbolic.svg",
+    ["03n"] = "weather-clouds-night-symbolic.svg",
+    ["04n"] = "weather-overcast-symbolic.svg",
+    ["09n"] = "weather-showers-scattered-symbolic.svg",
+    ["10n"] = "weather-showers-symbolic.svg",
+    ["11n"] = "weather-storm-symbolic.svg",
+    ["13n"] = "weather-snow-symbolic.svg",
+    ["50n"] = "weather-fog-symbolic.svg"
+}
+
+-- handy function to convert temperatire in Kelvin to Celcius
+function to_celcius(kelvin)
+    return math.floor(tonumber(kelvin) - 273.15)
+end
+
+local weather_timer = timer({ timeout = 600 })
+local resp
+
+weather_timer:connect_signal("timeout", function ()
+    local resp_json = http.request("http://api.openweathermap.org/data/2.5/weather?q=" .. city .."&appid=" .. open_map_key)
+    resp = json.decode(resp_json)
+    icon_widget.image = path_to_icons .. icon_map[resp.weather[1].icon]
+    temp_widget:set_text(to_celcius(resp.main.temp))
+end)
+weather_timer:emit_signal("timeout")
+
+weather_widget:connect_signal("mouse::enter", function()
+    naughty.notify{
+        icon = path_to_icons .. icon_map[resp.weather[1].icon],
+        icon_size=20,
+        text = '<b>Humidity:</b> ' .. resp.main.humidity .. '%<br><b>Temperature: </b>' .. to_celcius(resp.main.temp),
+        timeout = 5, hover_timeout = 0.5,
+        width = 200,
+    }
+end)
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