Blog · EIC Controls
Air temperature and relative humidity: radiation shields, sensor position, logging interval and what a regional average cannot say about your own point.
One hour or less between readings, at least 13 months of data to apply the EN 15757 standard, and a first campaign with many points before deciding how many loggers to keep. These are the decisions supported by two studies in Valencia museums and a US National Park Service guide.
The week's four articles (the logger's clock, the vaccine refrigerator, the European climate resilience law and replacing a humidity sensor), three signals with their sources (the Commission's new tools, the WMO greenhouse gas bulletin and climate indicators for tourism in southern Catalonia) and what comes next: COP31 from 9 November.
A study of 55 UK stations detected changes in measurement technique in humidity records; at one station, smaller detections were linked to routine sensor replacements. What it allows you to conclude, what it does not, and what to log in your own record.
In a German study of 75 vaccine refrigerators, only 24 stayed between 2 and 8 °C over seven days of logging. How to decide where the probe goes, whether it sits in air or in a buffer, how often to log and who reviews the data, drawing on guidance from Madrid and the Basque Country.
AEMET reported on 16 October 2026 that September was the warmest in mainland Spain since 1961; according to the accompanying advance summary, average maxima were 4.6 °C above normal and average minima 2.1 °C above. What to check in your own series before comparing it with official figures that are still provisional.
The week's two pieces, linked by relative humidity (from the dew point to leaf wetness), three European signals with their sources, and what is coming: the European climate resilience framework expected on 20 October and the end of summer time on the 25th.
On 2 October 2026 Copernicus published its review of the European summer: western Europe averaged a record 41 days of at least ‘strong’ heat stress. The index behind it combines four variables, and a station that logs only air temperature provides one of them.
On 23 September 2026 AEMET published an analysis of temperature records: in Spain, between 2016 and 2025, there were 221 warm-day records against 7 cold-day records, when 51 of each were expected. What a record means at your own measurement point and what to log so that it means something.
On 15 September 2026 the European Union launched Copernicus Sentinel-3C. What it observes from 800 km, why land surface temperature is not air temperature, and what to log at your own point.
