Weather in Prague

July is the warmest month (average 19.9°C, high 25.6°C) and January is the coolest (average -1.9°C, low -5.0°C). That 21.8°C swing in monthly averages is the first thing to plan around in Prague.

Rain is wet season runs from June to August, inside an annual total of 639 mm. The wettest month is August at 81 mm; the driest is February at 32 mm. Prague is in Czech Republic at 50.1°N. The 2001–2020 NASA POWER daily record describes a continental climate with a wide temperature swing. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are June, July, and August.

Temperature through the year

Monthly average highs run from 1.2°C in January to 25.6°C in July. Nights follow the same curve: -5.0°C in January and 14.1°C in July.

Mean high across all twelve months is 13.8°C and mean low is 4.4°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Rainfall pattern

The wet season in Prague starts in June and ends in August (June, July, and August). August is the core of it at 81 mm. February is the other extreme, with 32 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. August averages 12 such days; February averages 9.

Distinctive months in Prague

The year bottoms out in January. Plan for -5.0°C at night and 1.2°C in the afternoon. February is the driest month, averaging only 32 mm across 9 rainy days. Highs sit near 3.4°C. In March, Prague averages 8.5°C by day and -1.0°C at night, with 39 mm of rain. April brings 36 mm and 9 rainy days; temperatures run from 3.2°C to 14.5°C. May stands apart from the months beside it: 19.0°C / 7.8°C and 69 mm. The wet season opens in June. Expect 78 mm and 14 rainy days, with nights around 12.1°C.

July is the warmest month. Afternoon highs average 25.6°C and nights settle near 14.1°C, with 79 mm of rain. By August the wet season is ending. Prague still sees about 81 mm, but the next month is usually leaner. September stands apart from the months beside it: 20.3°C / 9.1°C and 52 mm. October stands apart from the months beside it: 14.2°C / 4.7°C and 46 mm. November brings 43 mm and 9 rainy days; temperatures run from 0.8°C to 7.5°C. In December, Prague averages 2.5°C by day and -3.1°C at night, with 41 mm of rain.

Best months to visit Prague

The three months with the highest comfort score are June, July, and August: June (17.6°C average, 78 mm, 68% humidity); July (19.9°C average, 79 mm, 64% humidity); August (19.5°C average, 81 mm, 65% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at June–August instead of the score.

How Prague compares inside Czech Republic

Prague is the only Czech Republic city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.