a. Kalimpong - 20mm (on 15Oct - a spillover from Cyclone 'HudHud'.)
b. Mangan (N Sikkim ) - 27mm
c. Darjeeling - 33mm
Monthly rainfall normal for the month of Oct in the Darjeeling-Sikkim Himalaya as per IMetD is 154.2mm (see here).
No rain, means no landslides but that also means less potable water and more forest fires during the many dry months ahead.