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Semily Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Semily.
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Climate overview of Semily
The climate in Semily, Liberec Region, Czech Republic, is marked by large temperature swings across the seasons, ranging from 24°C (75°F) in August to 2°C (36°F) in January.
The city receives around 941 mm (37 in) of rain/snowfall per year. It experiences warm summers and very cold winters. July is the wettest month and April the driest.
Semily Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Semily - and find the best time to visit.
Monthly Temperature in Semily
In Semily, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 24°C (75°F) in August to a very cold 2°C (36°F) in January.
Nighttime temperatures range from 13°C (55°F) in August to -4°C (25°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Semily
On average, Semily receives a reasonable amount of rain/snowfall, with an annual precipitation of 941 mm (37 in). The amount of precipitation varies moderately throughout the year. The wettest month, July, sees around 110 mm (4.3 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, April, still receives a respectable 55 mm (2.2 in) of rainfall. For more details, please visit our Semily Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Humidity in Semily by Month
The relative humidity is high throughout the year in Semily.
The city experiences its highest humidity in December, reaching 85%. In April, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Liberec, Czech Republic (27 KM, 16 Miles).
Best Time to Visit Semily
The most comfortable overall weather for exploring Semily is usually found in June and August. Conditions are generally least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
cold
Apr
mixed
May
very good
Jun
excellent
Jul
very good
Aug
excellent
Sep
very good
Oct
mixed
Nov
cold
Dec
cold
- Best overall: June and August
- Warmest weather: July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Semily
What is the best time to visit Semily?
June and August typically offer the most optimal weather in Semily. In contrast, January, February, March, November and December tend to have less optimal conditions. Semily has warm summers and very cold winters.
What temperatures can I expect in Semily?
Daytime highs range from 2°C (36°F) in January to 24°C (75°F) in August. Nighttime lows range from -4°C (25°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Semily get?
Annual rainfall is around 941 mm (37 in). July is the wettest month with 110 mm (4.3 in), while April is the driest with 55 mm (2.2 in).
Semily 3-Day Forecast
Semily on the map
Semily is highlighted - select any city to see its climate.
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