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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Letten, Switzerland, with temperature in the range of an average low of -3.2°C (26.2°F) and an average high of 3.2°C (37.8°F). With its high average temperature of 3.2°C (37.8°F) and a low of -3.2°C (26.2°F), January is regarded as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Letten, Switzerland, with an average temperature varying between 4.5°C (40.1°F) and -2.9°C (26.8°F). Letten records a slight change with February's average high-temperatures adjusting to a still cold 4.5°C (40.1°F) from January's 3.2°C (37.8°F). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Letten, Switzerland, with an average temperature fluctuating between 9.8°C (49.6°F) and 0.3°C (32.5°F). With the onset of March, Letten's average high-temperature sees a rise, moving from February's wintry 4.5°C (40.1°F) to a frosty 9.8°C (49.6°F). Weather in March »
Weather in April
April is a refreshing spring month in Letten, Switzerland, with temperature in the range of an average high of 15.8°C (60.4°F) and an average low of 3.7°C (38.7°F). Letten sees an increase in average high-temperatures during April, moving from a frosty 9.8°C (49.6°F) in March to a mild 15.8°C (60.4°F). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Letten, Switzerland, with an average temperature varying between 6.3°C (43.3°F) and 18.7°C (65.7°F). The transition into May notes an average high-temperature of a comfortable 18.7°C (65.7°F), revealing a mild distinction from the 15.8°C (60.4°F) in April. Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Letten, Switzerland, with an average temperature fluctuating between 22.8°C (73°F) and 10.1°C (50.2°F). As June arrives, Letten's weather shows a minor increase in high-temperatures, edging from May's comfortable 18.7°C (65.7°F) to an agreeable 22.8°C (73°F). Weather in June »
Weather in July
July in Letten, Switzerland, is a moderately hot summer month, with an average temperature varying between 24.8°C (76.6°F) and 12.2°C (54°F). The warmest temperatures occur during July, when averages reach a peak of 24.8°C (76.6°F) and a low of 12.2°C (54°F). Weather in July »
Weather in August
August, the last month of the summer in Letten, is also a moderately hot month, with an average temperature ranging between min 12.2°C (54°F) and max 24.7°C (76.5°F). With the start of August, Letten measures an average high-temperature of a still moderately hot 24.7°C (76.5°F), not significantly differing from July's 24.8°C (76.6°F). Weather in August »
Weather in September
The first month of the autumn, September, is still a refreshing month in Letten, Switzerland, with an average temperature fluctuating between 19.9°C (67.8°F) and 8.4°C (47.1°F). With the commencement of September, Letten records a moderate temperature decline, with the average high easing from August's moderately hot 24.7°C (76.5°F) to an enjoyable 19.9°C (67.8°F). Weather in September »
Weather in October
October, like September, is another mild autumn month in Letten, Switzerland, with an average temperature ranging between max 14.5°C (58.1°F) and min 5°C (41°F). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from 19.9°C (67.8°F) in September to a still refreshing 14.5°C (58.1°F). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Letten, Switzerland, with an average temperature fluctuating between 8.6°C (47.5°F) and 1.3°C (34.3°F). The arrival of November corresponds with a shift in temperature, down from a moderate 14.5°C (58.1°F) in October to a frosty 8.6°C (47.5°F). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Letten, Switzerland, with an average temperature ranging between min -1.6°C (29.1°F) and max 4.4°C (39.9°F). The onset of December results in a small decrease in the average high-temperature, moderately receding from a chilly 8.6°C (47.5°F) in November to an icy 4.4°C (39.9°F). Weather in December »
Updated: Feb 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Letten?
With average high and low temperatures of 3.2°C (37.8°F) and -3.2°C (26.2°F) respectively, January is Letten's coldest month.
What is the most humid month in Letten?
The most humid month is January, with an average relative humidity of 88%.
How many days does it rain in Letten?
In Letten, Switzerland, during the entire year, the rain falls for 134.8 days and collects up to 471mm (18.54") of precipitation.
When does it snow in Letten?
Months with snowfall are January through May, October through December.
How many days does it snow in Letten?
Throughout the year, in Letten, Switzerland, there are 30.3 snowfall days, and 305mm (12.01") of snow is accumulated.
What is the month with the least sunshine in Letten?
January, February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Letten.
What are the months with the lowest UV index in Letten?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month in Letten?
April is the month with the least rainfall in Letten. Rain falls for 10.7 days and accumulates 21mm (0.83") of precipitation.
When it does not snow in Letten?
In Letten, snow does not fall in June through September.
When are the longest days in Letten?
The month with the longest days in Letten, Switzerland, is June, with an average of 15h and 54min of daylight.
What is the month with the highest UV index in Letten?
June and July, with an average maximum UV index of 5, are months with the highest UV index.
What is the hottest time of year in Letten?
July is the warmest month in Letten, Switzerland, with the temperature often reaching an average high of 24.8°C (76.6°F) and an average low of 12.2°C (54°F).
What is the least humid month in Letten?
The least humid month in Letten, Switzerland, is July, with an average relative humidity of 75%.
What is the wettest month in Letten?
The month with the most rainfall in Letten is July, when the rain falls for 14.3 days and typically aggregates up to 61mm (2.4") of precipitation.
What month has the most sunshine in Letten?
August has the most sunshine of the year, with an average of 10.4h of sunshine.
When is Daylight Saving Time (DST) in Letten?
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
What is the snowiest month in Letten?
The month with the most snowfall in Letten, Switzerland, is December, when snow falls for 6.6 days and typically aggregates up to 85mm (3.35") of snow.
What is the month with the shortest days in Letten?
December has the shortest days of the year in Letten, with an average of 8h and 30min of daylight.
Average temperature
Letten, Switzerland
The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (3.2°C).
The months with the highest average low temperature are July and August (12.2°C).
The coldest month (with the lowest average low temperature) is January (-3.2°C).
Average pressure
Letten, Switzerland
- Average pressure in January:
1019.3mbar - Average pressure in February:
1017.7mbar - Average pressure in March:
1017.2mbar - Average pressure in April:
1015.7mbar - Average pressure in May:
1016.3mbar - Average pressure in June:
1016.6mbar
- Average pressure in July:
1017.1mbar - Average pressure in August:
1017.7mbar - Average pressure in September:
1018.6mbar - Average pressure in October:
1018.6mbar - Average pressure in November:
1015.8mbar - Average pressure in December:
1020.8mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed
Letten, Switzerland
- Average wind speed in January:
7.5km/h - Average wind speed in February:
8.1km/h - Average wind speed in March:
8.7km/h - Average wind speed in April:
7.4km/h - Average wind speed in May:
7.6km/h - Average wind speed in June:
7.1km/h
- Average wind speed in July:
6.8km/h - Average wind speed in August:
6km/h - Average wind speed in September:
6.3km/h - Average wind speed in October:
6.3km/h - Average wind speed in November:
6.7km/h - Average wind speed in December:
7.6km/h
The windiest month (with the highest average wind speed) is March (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity
Letten, Switzerland
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is July (75%).
Average rainfall
Letten, Switzerland
The wettest month (with the highest rainfall) is July (61mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days
Letten, Switzerland
- Average rainfall days in January:
9.5 days - Average rainfall days in February:
8 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
10.7 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
10.2 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (8 days).
Average snowfall
Letten, Switzerland
The month with the highest snowfall is December (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
Letten, Switzerland
- Average snowfall days in January:
8.3 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
6.6 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Letten, Switzerland
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 2min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
15h and 5min
- Average daylight in July:
15h and 3min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 4min - Average sunshine in April:
9h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 48min).
Average sunshine days
Letten, Switzerland
- Average sunshine days in January:
15 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
17.1 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
14.5 days
- Average sunshine days in July:
14.1 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
17.4 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (13.6 days).
Average UV index
Letten, Switzerland
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Letten, Switzerland
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Letten, Switzerland
The months with the highest visibility are April, July and August (9km).
The month with the lowest visibility is January (7km).
