Source: every value is pulled live from Open-Meteo in your browser when you hit Refresh β nothing is typed in by hand. The forecast uses global weather models (ECMWF / GFS / DWD); the "Last yr" figures come from the ERA5 reanalysis archive for the same villages and dates in May 2026. Raw-data links are at the bottom of this page so you can check any number at the source.
How much to trust it: a weather model can only see about 16 days ahead. The trek is still months away, so right now every day shows May climatology (typical averages), clearly tagged "Typical" vs live "π°οΈ Forecast." From late April 2027 the forecast reaches these dates β Refresh and the cards flip to real forecast.
Mountain caveat: Himalayan weather is intensely local and changes fast β a model grid-point can't capture a specific valley, and altitude cuts real accuracy. Treat this as planning guidance, not a promise, and always follow your guide and on-the-ground conditions on the day.
Short version: you moved to 8β25 May 2027, which is one of the two best windows of the year for Everest Base Camp β the pre-monsoon spring season. Expect mostly clear skies, minimal rain, warmer days and the best mountain views of the year. This is when Everest summit expeditions happen, so the trail is at its liveliest.
Day to day: mornings are crisp and clear; some cloud and the odd short thunderstorm can build in the afternoons, more so in the last week of May as humidity rises ahead of the monsoon β those storms actually clean the air and sharpen the views next morning.
Flights & buffer: Lukla flights are far more reliable in spring than in the monsoon. Your trek lands back in Kathmandu ~20 May and you don't fly home until the evening of 25 May, so you have a generous 4β5 day buffer β plenty of slack if a Lukla flight slips.