Semily Weather & Climate: Best Time to Visit

Average temperatures, rainfall, sunshine and the best time to visit Semily.

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Forecast Temperature Rainfall Sunshine

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. 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.

January

2°C (36°F)View January → February

3°C (37°F)View February → March

7°C (45°F)View March → April

13°C (55°F)View April → May

18°C (64°F)View May → This monthJune

21°C (70°F)View June → July

23°C (73°F)View July → August

24°C (75°F)View August → September

18°C (64°F)View September → October

12°C (54°F)View October → November

7°C (45°F)View November → December

3°C (37°F)View December →

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

More Temperature details →

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

More Rainfall details →

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).

More Humidity details →

Best Time to Visit Semily

The best time to visit Semily is during May, June, July, August and September, when the weather provides comfortable temperatures between 18°C (64°F) and 24°C (74°F). With rainfall of 79 mm (3.1 in) to 110 mm (4.3 in), you can expect pleasant weather during your visit in these months.

Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.

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.

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.