If it's a typo, this would make sense. Examples;

The relationship between combined factors (weekly ...https://www.researchgate.net › figure › The-relationship-b...
Download Table | The relationship between combined factors (**weekly temperature and weekly humidity**) and mean weekly proportional abundance of D. suzukii ...

Humidity affects the yield of your plants. How to control it ...https://www.plagron.com › grow-topics › humidity
We recommend a humidity of 80 to 85 percent. As your plant grows you should lower the humidity. In the last weeks of the grow phase we suggest a maximum humidity of 60 percent. ... Keep in mind that the **perfect weekly humidity** depends on the plant species.

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Note added at 37 mins (2021-02-01 18:47:25 GMT)
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Typo for "semanal", that is! The numbers in the cells would tell you if this is the right guess.

Indirect Health Effects of Relative Humidity in Indoor ... - JStorhttps://www.jstor.org › stable
Schools 25 - 35 — with **mean weekly humidity levels** above 75% compared to 125 children from homes with lower mean relative humidity levels. The difference was ...
by AV Arundel · ‎1986

Poliomyelitis and Atmospheric Humidity in an Elevated ...https://ajph.aphapublications.org › pdf › AJPH.42.10.1246
**average weekly humidity curve** at 90°. F., based on four daily readings, reached the neighborhood of 16 per cent and tended to disappear when this and lower.

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Note added at 38 mins (2021-02-01 18:48:05 GMT)
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They rates are typically listed as a percentage.