In this issue of <italic>Weather</italic>.

This month’s issue focuses on the meteorological effects of solar eclipses using data collected in the UK on 20 March 2015 and the USA on 21 August 2017. We begin with Edward Hanna’s examination of data from stations run by amateur enthusiasts, most of them in the Climatological Observers’ Link network. ‘Meteorological effects of the 20 March 2015 solar eclipse over the United Kingdom’ on p. 71 builds on the observations made at Met Office stations, published in Clark ( ) and Hanna <italic>et al</italic>. ( ). The observations show a high degree of consistency and the reduction in solar radiation had a strong signal in all parts of the UK, even where there were cloudy skies in most southern, as well as many northern and eastern areas. It also adds to the effects reported in this journal, following the eclipse of 11 August 1999 (Hanna, ). Bob Bourton’s short contribution ‘The thermal effects noticed at Heathrow Airport during the partial solar eclipse of 20 March 2015 ‘on p. 81 looks at the effects of the 2015 eclipse at Heathrow Airport. The range of instruments available across the airport and in roads leading to it gives further insight into the temperature and radiation changes during the obscuration of 85% of the sun’s disk in the west of London. On p. 90, we move to the observations made in the USA under the swathe of total or near‐total eclipse on 21 August 2017 in ‘Meteorological impacts of the total solar eclipse of 21 August 2017’, as reported by Stephen Burt. The data from sites run by the National Oceanic and Atmospheric Administration (NOAA, ) are supplemented by observations made by Stephen Burt near Jackson, Wyoming. Because the path of this eclipse crossed much of the USA and could be observed at least partially in all parts of the country, this was probably the best observed eclipse in history. Under clear skies, falls of about 5 degC were seen, accompanied by a fall in wind speed, now known from observations on both sides of the Atlantic to be a significant effect of this short‐duration phenomenon. We also include a seasonally‐appropriate look at the effects of year‐to‐year weather on plants and animals on p. 86. Ian Strangeways’ paper ‘Phenology: plants and animals as meteorological sensors’, gives us an overview of this subject, which used to be one of the activities of the Royal Meteorological Society. He includes the history of its development in the UK, as well as its value in weather science and our knowledge of the effects of changing climate. [ABSTRACT FROM AUTHOR]