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Best Time to Hike GR 20 Principale

wb_sunny Best months: June, August
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month-by-month temperatures and rainfall for GR 20 Principale, France, based on 2-year climate normals.

Units

Month-by-month weather on GR 20 Principale

Month Avg high Avg low Rainfall Rainy days
January 41°F5°C 31°F-1°C 144 mm 17
February 44°F7°C 31°F-1°C 109 mm 9
March 46°F8°C 33°F0°C 196 mm 17
April 53°F11°C 38°F3°C 110 mm 15
May 57°F14°C 43°F6°C 121 mm 17
June 70°F21°C 54°F12°C 24 mm 7
July 74°F23°C 58°F15°C 33 mm 10
August 74°F23°C 59°F15°C 34 mm 7
September 64°F18°C 50°F10°C 73 mm 12
October 56°F14°C 44°F7°C 189 mm 18
November 48°F9°C 36°F2°C 96 mm 9
December 42°F5°C 30°F-1°C 124 mm 12

Highlighted rows are the recommended hiking window. Climate normals via Open-Meteo (2-year average). Mountain weather varies — always check a live forecast before you set off.

When to go

The best months to hike GR 20 Principale are June, August. Expect daytime highs around 72°F22°C and nights near 57°F14°C.

Pack flexible layers and a reliable rain shell — conditions can shift quickly in the mountains.

GR 20 Principale

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