Set locale.

statusweather.cpp

@@ -28,6 +28,7 @@
 #include <functional>
 #include <future>
 #include <iostream>
+#include <locale>
 #include <map>
 #include <mutex>
 #include <stdexcept>
@@ -171,6 +172,8 @@ void print_weather()
                                 return "#66ff66";
                             }()};
 
+    // NOTE: It is not possible to use local decimal separators and specify how
+    // many digits should be displayed after the separator. 🙁
     std::cout << format(R"({0:s} <span color="{1:s}">{2:.1f}°C</span>{3:s})",
                         weather.icon, color, weather.temperature,
                         weather.old ? R"( <span color="red">⏳</span>)" : "")
@@ -196,6 +199,7 @@ int main()
 {
     try
     {
+        std::locale::global(std::locale(""));
         // TODO: Implement clean shutdown.
         std::atomic<bool> cancelled{false};
         auto future{