I found current Fluent API design a bit hard to read for two reasons:

• method names are too verbose
• Slightly counter-intuitive to have arguments before the log message

Especially the second issue, people (at least for me) found it hard to read as I need to twist my mind to find corresponding arguments before and after the message.

imho it looks a bit better to provide alternatives like this (totally fine to keep the original form)

logger.atDebug()
        .message("Temperature of {} rise from {} to {}" )
        .arg(country).arg(oldTemp).arg(newTemp).log();

// equivalent to 

logger.atDebug()
        .addArgument(country).addArgument(oldTemp).addArgument(newTemp)
        .log("Temperature of {} rise from {} to {}");

// Compare to the old-style
logger.debug("Temperature of {} rise from {} to {}", country, oldTemp, newTemp);