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The temperatures in Glarus in September are quite cold with temperatures between 5°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Glarus. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Glarus during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Glarus.
Our weather forecast can give you a great sense of what weather to expect in Glarus in September 2026.
If you’re planning to visit Glarus in the near future, we highly recommend that you review the 14 day weather forecast for Glarus before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -9° | 1 | 9 | 21 | 257 mm | Awful | Glarus in January |
| February | -2° / -9° | 2 | 6 | 21 | 174 mm | Awful | Glarus in February |
| March | 1° / -6° | 3 | 7 | 22 | 206 mm | Awful | Glarus in March |
| April | 6° / -1° | 9 | 5 | 17 | 205 mm | Awful | Glarus in April |
| May | 10° / 2° | 14 | 4 | 14 | 394 mm | Awful | Glarus in May |
| June | 14° / 7° | 18 | 8 | 4 | 463 mm | Bad | Glarus in June |
| July | 16° / 8° | 18 | 12 | 1 | 403 mm | Ok | Glarus in July |
| August | 16° / 8° | 17 | 13 | 1 | 463 mm | Ok | Glarus in August |
| September | 13° / 5° | 11 | 15 | 4 | 252 mm | Awful | Glarus in September |
| October | 8° / 1° | 8 | 12 | 11 | 213 mm | Awful | Glarus in October |
| November | 4° / -2° | 4 | 11 | 16 | 210 mm | Awful | Glarus in November |
| December | -1° / -7° | 2 | 8 | 21 | 228 mm | Awful | Glarus in December |