Mine includes the 'medium' I will use to check local temperatures because sadly weather reports can vary greatly so I want clients to know decisions are based on X report to avoid conflict of them having heard a different advisory or report.

Lists that I will check before each outing for UV rating, Air Quality, Temperature including wind-chill and any weather warnings that might be in effect from thunderstorms to air quality concerns and take that into consideration.

During the winter months we do not go outside if temperatures are below -10 degrees Celsius. My policy xplains that windchill is taken into affect as it is felt in the backyard ~ because basically there are times when the windchill at the local weather office says it 'temperature is -6 but it feels like -15' but there is NO WIND in our area or yard and the sun is shining so I would take them outside because the 'core temp' is not below -10 there are than there are other times when it is '-2 but it feels like -11' and we do NOT go outside because the wind is active in the yard and whipping snow around out there in faces and just miserable ... basically my policy is that I use my discretion and adjust our time out there dependent on the wind and how the kids are coping and parents need to dress their child for the weather assuming we will be outside daily and trust my judgement if we are not!

I do not have a temperature for too HOT to be honest ~ my policy for the other times of year states the program will be outside daily unless there is a heat advisory issued by the Public Health requesting that children and elderly do not spend ANY time outside because it is so bad. Otherwise on the really warm days where there is an advisory to LIMIT outdoor active we will be outside but limiting our time from early in the morning and later in the afternoon to avoid the high UV / heat / smog times between 11 – 3 pm. Also explains we engage in water based activities to help us be active while still remaining a cool core temperature as well as we have regularly access to water and are offered purred fruit pops to help maintain hydration during warm months ... as long as they are playing happily and drinking lots I am good ~ if it is too much for us than we would come back in and like the winter it is MY discretion so send your child daily with all the things needed for outdoor exploration because we will likely be making the attempt.

I personally do not DO the school runs ~ if I did HAVE to go for my own child I would likely want a policy in place like you are suggesting that if I felt it was too dangerous to take the other children outside due to the weather that parents would be notified that school drop offs / pick ups would be cancelled and the children would either have to find alternative transport OR if you have the space to meet your ratio you could offer to be willing to keep them all day for the additional fee of X to cover the extra food/care of the full day ... IMO this is no different that when they cancel the 'buses' because the weather is bad but leave the schools open for those who want to walk or drive themselves and parents who use that bus service have to decide do I drive them to school myself OR just keep them home!