The GR 11 in September: warnings stage by stage
GR 11 in September, 38 stages. September warnings 2019–2025; updated 27 October 2026.
If you walk the whole route in September, expect around 9.5 warning days on your stage, on average. It's number 6 of 12 for fewest warnings.
9.5
warning days
in 38 stages, on average
25%
of stage-days with a warning
year average: 30%
1.7
orange or red days
in 38 stages, on average
Rain
the most common warning
in September
Stage by stage in September
Share of September days with some warning in each stage's zones, 2019–2025; the colour is each day's highest level.
Which warnings come in September
Stage-days with a warning of each kind in September, on average; a day can have several.
Section by section in September
| Section | Warning days | Most common |
|---|---|---|
| Navarre | 1.2 over 7 stages | rain and storms |
| Aragon | 2.9 over 11 stages | rain and storms |
| Lleida | 1.9 over 8 stages | rain and storms |
| Girona | 3.5 over 12 stages | rain and storms |
The worst September days on the GR 11
- orange5 September 2026: orange warning on 33 of 38 stages, for heat · the episode
- orange3 September 2018: orange warning on 26 of 38 stages, for rain and storms
- orange8 September 2025: orange warning on 26 of 38 stages, for rain and storms · the episode
- orange21 September 2025: orange warning on 26 of 38 stages, for rain and storms
- orange5 September 2018: orange warning on 24 of 38 stages, for rain and storms
- orange13 September 2025: orange warning on 20 of 38 stages, for rain and storms
- orange4 September 2018: orange warning on 17 of 38 stages, for rain and storms
- orange18 September 2020: orange warning on 17 of 38 stages, for rain and storms
Frequently asked questions
Is September a good month to walk the GR 11?
By warnings, September is number 6 of 12 for calm: on average, 9.5 warning days walking the 38 stages. The section with the most warnings in September is Girona; the fewest, Navarre.
Which warnings are there on the GR 11 in September?
Mostly for rain and storms. Orange or red shows up on 1.7 stage-days in September, on average.
This is not a forecast: it counts the warnings AEMET issued on those dates in past years. A warning is a forecast that a threshold will be crossed in the zone, not damage.