Hello,
You should be able to provide a date filter when you create the visualization. To specify the last month, I believe you should be able to use: now/M-1M for the start of your range and now/M for the end of it. Provided you've enabled auto-refresh, that should give you what you need whenever you pull up the visualization.
Here are a few good links to help you out:
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https://www.elastic.co/guide/en/kibana/current/autorefresh.html
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https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math
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Several date math questions (the range formats used here are useful)
Also, here's a quick screenshot of adding (editing in my case) a filter to your visualization in case you haven't tried this before:
Regards,
Aaron