Winter
Dec → Feb6 to 9°
nights 0 to 1°
- 11 rainy days · 63 mm
When is the best time to visit the Sundgau?
- Jan6°not recommended
- Feb9°not recommended
- Mar12°not recommended
- Apr16°fair
- May20°recommended
- Jun25°recommended
- Jul27°recommended
- Aug27°recommended
- Sep22°recommended
- Oct17°fair
- Nov10°not recommended
- Dec7°not recommended
RecommendedFairNot recommended· afternoon temperature
The weather in the Sundgau, month by month
The table of records, month by month
| Month | High | Low | Rainfall | Rainy days | Best |
|---|---|---|---|---|---|
| January | 6° | 0° | 76 mm | 12 d | |
| February | 9° | 1° | 50 mm | 9 d | |
| March | 12° | 2° | 54 mm | 10 d | |
| April | 16° | 5° | 67 mm | 9 d | |
| May | 20° | 9° | 85 mm | 11 d | ✓ |
| June | 25° | 14° | 79 mm | 10 d | ✓ |
| July | 27° | 15° | 56 mm | 9 d | ✓ |
| August | 27° | 14° | 58 mm | 8 d | ✓ |
| September | 22° | 11° | 59 mm | 9 d | ✓ |
| October | 17° | 7° | 72 mm | 10 d | |
| November | 10° | 3° | 64 mm | 10 d | |
| December | 7° | 1° | 62 mm | 12 d |
The four seasons in the Sundgau, in figures
What the 2015-2024 records (Altkirch) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May12 to 20°
nights 2 to 9°
- 10 rainy days · 69 mm
Summer
Jun → Aug25 to 27°
nights 14 to 15°
- 9 rainy days · 64 mm
Autumn
Sep → Nov10 to 22°
nights 3 to 11°
- 10 rainy days · 65 mm
Book early for May to September
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in the Sundgau, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 15h58 of daylight, in December 8h27, a difference of 7h31.
8h50Jan
10h11Feb
11h45Mar
13h34Apr
15h06May
15h58Jun
15h37Jul
14h15Aug
12h29Sep
10h45Oct
9h12Nov
8h27Dec
Calculated for the latitude of the reference point "Altkirch" (47.62°). Values on the 15th of each month, local solar time.
What to do in the Sundgau, month by month
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiking | ||||||||||||
| Towns & culture | ||||||||||||
| Long days |
favourablewith compromisesunfavourable
- Hiking: April, July, August, September
- Towns & culture: February, March, April, May, June, July, August, September, October, November
- Long days: May, June, July, August
Grid derived from the records (temperature, rainfall), not from an opinion.
Travelling off-peak
Month by month, in detail
January
Not recommended6°0° at night
- 76 mm · 12 d
Low season, lower prices
February
Not recommended9°1° at night
- 50 mm · 9 d
Low season, lower prices
March
Not recommended12°2° at night
- 54 mm · 10 d
Low season, lower prices
April
Fair16°5° at night
- 67 mm · 9 d
Low season, lower prices
May
Recommended20°9° at night
- 85 mm · 11 d
Busy, without the crush
June
Recommended25°14° at night
- 79 mm · 10 d
Busy, without the crush
July
Recommended27°15° at night
- 56 mm · 9 d
High season, book early
August
Recommended27°14° at night
- 58 mm · 8 d
High season, book early
September
Recommended22°11° at night
- 59 mm · 9 d
Busy, without the crush
October
Fair17°7° at night
- 72 mm · 10 d
Low season, lower prices
November
Not recommended10°3° at night
- 64 mm · 10 d
Low season, lower prices
December
Not recommended7°1° at night
- 62 mm · 12 d
Quiet, then the holidays
Read the twelve months in detail
January. Deep winter: 6 °C at the warmest of the day, 0 °C at night. Expect 12 days of rain in the month (76 mm). Low season: fewer people, lower prices.
February. Cool: 9 °C at best, 1 °C at night. Expect 9 days of rain in the month (50 mm). Low season: fewer people, lower prices.
March. Cool: 12 °C at best, 2 °C at night. Expect 10 days of rain in the month (54 mm). Low season: fewer people, lower prices.
April. Cool: 16 °C at best, 5 °C at night. Expect 9 days of rain in the month (67 mm). Low season: fewer people, lower prices.
May. Mild, 20 °C in the afternoon and 9 °C early in the morning. Expect 11 days of rain in the month (85 mm). Busy season, without the crush.
June. 25 °C in the afternoon and 14 °C at night. Expect 10 days of rain in the month (79 mm). Busy season, without the crush.
July. 27 °C in the afternoon and 15 °C at night. Expect 9 days of rain in the month (56 mm). High season: book early.
August. 27 °C in the afternoon and 14 °C at night. Expect 8 days of rain in the month (58 mm). High season: book early.
September. Mild, 22 °C in the afternoon and 11 °C early in the morning. Expect 9 days of rain in the month (59 mm). Busy season, without the crush.
October. Cool: 17 °C at best, 7 °C at night. Expect 10 days of rain in the month (72 mm). Low season: fewer people, lower prices.
November. Cool: 10 °C at best, 3 °C at night. Expect 10 days of rain in the month (64 mm). Low season: fewer people, lower prices.
December. Deep winter: 7 °C at the warmest of the day, 1 °C at night. Expect 12 days of rain in the month (62 mm). Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit the Sundgau?
May to September: over these months, recorded highs range from 20 to 27 °C, with 9 days of rain a month on average (2015-2024 records, Altkirch).
Which month should you avoid in the Sundgau?
January: it is the wettest of the months to avoid, with 76 mm over 12 days of rain on average, according to 2015-2024 records at the reference point (Altkirch).
What is the hottest month in the Sundgau?
July, with 27 °C on average in the afternoon and 15 °C at night. 2015-2024 records (Altkirch).
What is the coldest month in the Sundgau?
January, with 6 °C at best during the day and 0 °C at night. 2015-2024 records (Altkirch).
What is the driest month in the Sundgau?
February: 50 mm over 9 days of rain, against 85 mm in May, the wettest month.
Does it get cold at night in the Sundgau?
The gap between day and night reaches 13 °C in August: 27 °C in the afternoon, 14 °C at dawn. Pack an extra layer, even in high season.
When is the best time to hike in the Sundgau?
April, July, August, September: highs between 12 and 29 °C and no more than 9 days of rain a month according to 2015-2024 records (Altkirch), the safest windows for walking.
Plan this trip
📒 The free printable Sundgau guide: itinerary, map, where to sleep→
🧭 When to visit France: the country overview→
🗓️ Best time to visit: all our destinations→
Compare with other destinations
Photos: verod1 / CC BY-SA 4.0 (Wikimedia Commons) · Le sixième rêve / Pexels · Klovovi / CC BY 2.0 (Wikimedia Commons)