Canton of St. Gallen · Switzerland
St. Gallen in September
In September, St. Gallen averages a daytime high of 17 °C and a night-time low of 9 °C, with about 108 mm of rain over the month. St. Gallen has no month that is both mild and dry by the measure used here.
- Average high
- 17 °C
- Average low
- 9 °C
- Rain in the month
- 108 mm
- Daylight on 15 Sep
- 12 h 20 min
- Comfortable month
- No
- Places to stay
- 81
When to go
How September compares with the rest of the year in St. Gallen
September is the 4th warmest month in St. Gallen by average daytime high; across the year the highs run from 2 °C to 22 °C and the lows from -3 °C to 12 °C. By day, September is 4 °C cooler than August, and October is 5 °C cooler than September.
September brings 108 mm of rain, more than the monthly average of 97 mm (1165 mm a year); it is the 5th wettest month.
On 15 September the sun is up for about 12 h 20 min, against 8 h 30 min at the shortest and 16 h at the longest point of the year (calculated from the latitude, sunrise to sunset).
| Month | High | Low | Rain | Comfortable |
|---|---|---|---|---|
| January | 2 °C | -3 °C | 62 mm | |
| February | 3 °C | -3 °C | 59 mm | |
| March | 8 °C | 0 °C | 66 mm | |
| April | 12 °C | 3 °C | 78 mm | |
| May | 16 °C | 7 °C | 126 mm | |
| June | 20 °C | 11 °C | 136 mm | |
| July | 22 °C | 12 °C | 142 mm | |
| August | 21 °C | 12 °C | 140 mm | |
| September | 17 °C | 9 °C | 108 mm | |
| October | 12 °C | 6 °C | 89 mm | |
| November | 6 °C | 1 °C | 85 mm | |
| December | 3 °C | -2 °C | 74 mm |
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
When to go
Is September a good time to visit St. Gallen?
Not by the measure used here: the average high of 17 °C is below 18 °C and about 108 mm of rain is 80 mm or more. No month in St. Gallen meets it.
The measure is about weather for a city stay only; it says nothing about events, school holidays or prices.
When to go
Destinations near St. Gallen that are comfortable in September
Within 300 km, nearest first, by the same measure.
Where to stay
Where to stay in St. Gallen
This guide lists 81 places to stay in St. Gallen: 1 chain property with its details and own websites, and 80 hotels recorded in Wikidata. By straight-line distance from the centre: under 1 km, 14; 1–3 km, 2; 3–10 km, 17; 10 km or more, 48.
Sources: climate from CRU TS v4.10 (Climatic Research Unit, University of East Anglia; Open Database License), 1991–2020 averages; day length calculated from the latitude; places to stay from each operator's own public pages and Wikidata. How this guide is made.