About Sun by Month

Radif Partners computes, for each holiday destination, the monthly averages of daytime high, night low, rainfall, wet days and sea temperature from the daily records of named weather stations in NOAA's GHCN-Daily archive and from NOAA's OISST sea surface temperature grid, over the 1991 to 2020 reference period. Every figure names its station and the number of years behind it. We are not a travel agent, sell no holiday and ask for no contact details.

Why this site exists

Search for where is hot in a given month and you mostly find travel agents and tour operators. Their tables rarely say where a figure comes from, which years it covers, or whether "sea temperature" means an average, a peak or a guess. Some pages update their dates every year while the numbers stay the same. We wanted the opposite: one table per month and per place, built from public measurements, with the station named and the number of years shown, so that you can check any figure yourself.

Who publishes it

The site is published by Radif Partners, a company that builds tools on public data. It is an independent site, not a travel agent or a tour operator. It sells no holiday, takes no commission, carries no affiliate link and asks for no contact details.

Radif Partners
49 rue du Ressort
63000 Clermont-Ferrand, France
contact@sunbymonth.co.uk

What it relies on

NOAA's GHCN-Daily archive of station records and its OISST analysis of sea surface temperature, both public, for 62 places and the period 1991 to 2020. The method page lists every station and every rule; the editorial policy explains how corrections are made.

What it leaves out

Forecasts, sunshine hours (for lack of an official source we could read), prices, and any advice on health or safety abroad, for which the Foreign, Commonwealth and Development Office publishes travel advice.

Contact

contact@sunbymonth.co.uk, for a station that looks wrong or a place you would like added.