Recent dry conditions across southeast England have kept London's May 2026 precipitation totals near or below the long-term average of roughly 40 mm. Through mid-May, accumulated rainfall stands at approximately 20 mm, supported by high-pressure dominance and limited frontal activity that has suppressed widespread showers. Ensemble forecast models from the Met Office and ECMWF indicate only scattered light rain for the remaining two weeks, with low probability of intense systems. This pattern anchors trader sentiment around the closely matched 15–20 mm and 25–30 mm brackets, reflecting uncertainty in whether subtle Atlantic troughs will deliver enough additional moisture to push totals higher.