Your August weather guide
WarmWeather in Prague in August
August is a good choice for Prague if you want warm days for exploring the city, but not if dry weather is essential. Daytime highs average around 25°C, with nights cooling to about 15°C. The catch is rain: roughly 11 days have measurable rainfall, so keep your plans flexible. It is Prague's warmest month, suited to travellers happy to carry a light layer and make room for indoor breaks.
Long-term climate averages for Prague, not a forecast · 1991-2020
Prague, month by month
Your snapshot
At a glance
The useful details for Prague.
- Average daytime high
- 24.8°C
- 9 in 10 days stay below 30°C
- Average night-time low
- 15.0°C
- coldest 10% of nights: 11°C or lower
- Compared with London
- +3.4°C
- London averages 21.4°C in August
- Sunshine per day (est.)
- 6.5h
- 45% of 14.3 h of daylight
- Rainy days (1 mm+)
- 11
- 73 mm over the month
- Humidity
- 66%
- Days over 25°C
- 47%
- 11% over 30°C
- Record high 1991-2020
- 36.9°C
- 2003-08-13
- Record low 1991-2020
- 8.1°C
- 2016-08-11
- Flight from London
- ≈ 2 h
- 1035 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How August compares
August is the 1st warmest month of the year in Prague and ranks 125th of 134 destinations we compare for August - see where else is hot in August. Against London's average high of 21.4°C in August, Prague is 3.4°C warmer by day and 1.5°C warmer at night.
Daytime and night-time in August
The typical August day in Prague peaks at 24.8°C, but that is an average: the warmest 10% of days reach 30.3°C or more. Roughly 1 in 2 days top 25°C and 1 in 9 pass 30°C. Nights average 15.0°C; one night in ten drops to 11.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 36.9°C (2003-08-13) and the coldest night 8.1°C (2016-08-11).
Rain in August
Wet (more than 8 rainy days): about 11 days with 1 mm or more, 73 mm in total. Year to year it varies a lot - the wettest August was 2002 with 234 mm, the driest 2003 with 13 mm. Humidity averages 66%.
Sunshine and daylight
Around 6.5 hours of sunshine a day (estimated from cloud cover), 14.3 hours of daylight: the sun rises about 05:52 and sets about 20:22 local time in mid-August. Average cloud cover is 55%.
Is August a good time to visit Prague?
It is a reasonable choice: warm days but expect showers. The best months for Prague on our scoring are August, July, June.
Warm days, cooler evenings
Plan on light clothing during the day, with a jumper or light jacket for evenings. The average high is comfortable for spending time outside, though hotter spells can make walking at midday less appealing. On those days, put longer walks earlier in the day and leave yourself time for shade or an indoor break. Nights usually offer relief from the daytime warmth, but the colder ones can fall to around 11°C, so packing only summer clothes would be a mistake. August suits you if you like warmth without needing consistently hot weather; it is less suitable if you strongly dislike occasional heat.
Leave room for rain
Rain is the main compromise in August, so treat an entirely outdoor itinerary as something to adjust rather than a fixed plan. Around 11 rainy days means waterproof protection deserves space in your bag, even when the forecast looks warm. A light waterproof is a practical choice for walking, and shoes that cope with wet pavements will be more useful than footwear reserved for dry weather. Rainy days do not necessarily mean rain throughout the day, but sunshine is not constant either. Keep outdoor plans movable and have an indoor alternative ready rather than relying on uninterrupted summer weather.
A little perspective
Prague through the year
August is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|
| January | 3.0°C | -2.4°C | 2.2 | 37 | 10 | 0% |
| February | 5.0°C | -2.1°C | 3.0 | 33 | 8 | 0% |
| March | 9.3°C | 0.7°C | 3.9 | 43 | 11 | 0% |
| April | 14.8°C | 4.4°C | 5.7 | 38 | 9 | 1% |
| May | 19.2°C | 9.2°C | 6.0 | 67 | 13 | 11% |
| Junebest | 22.5°C | 13.0°C | 6.5 | 77 | 12 | 31% |
| Julybest | 24.6°C | 15.1°C | 6.9 | 82 | 13 | 45% |
| AugustSelectedbest | 24.8°C | 15.0°C | 6.5 | 73 | 11 | 47% |
| September | 19.7°C | 10.9°C | 5.0 | 57 | 9 | 12% |
| October | 14.1°C | 6.6°C | 3.4 | 44 | 10 | 0% |
| November | 8.0°C | 2.3°C | 2.1 | 40 | 9 | 0% |
| December | 4.0°C | -1.1°C | 2.0 | 41 | 10 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in August
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Slovenia · 24°C by day
Bled
France · 24°C by day
Paris
Mauritius · 25°C by day · sea 24°C
Flic en Flac
Brazil · 26°C by day · sea 22°C
Rio de Janeiro
Poland · 24°C by day
Krakow
A little more detail
Prague in August FAQs
Plain answers, grounded in the averages.
Is Prague hot in August?
Prague is warm in August: the average daytime high is 24.8°C and nights average 15.0°C. Roughly 1 in 2 August days reach 25°C.
How much does it rain in Prague in August?
Prague sees about 11 rainy days (1 mm or more) and 73 mm of rain in a typical August. The wettest August between 1991 and 2020 was 2002 (234 mm) and the driest was 2003 (13 mm).
How sunny is Prague in August?
Prague gets around 6.5 hours of sunshine a day in August out of 14.3 hours of daylight (estimated from average cloud cover).
How does Prague compare with the UK in August?
Prague is on average 3.4°C warmer than London by day in August (24.8°C against 21.4°C).
What is the hottest August on record in Prague?
Between 1991 and 2020 the hottest August day in Prague reached 36.9°C on 2003-08-13, and the coldest night dropped to 8.1°C on 2016-08-11.
Is Prague warmer than London in August?
Yes. Prague's average daytime high is 24.8°C, compared with London's 21.4°C, a difference of 3.4°C. Expect noticeably warmer afternoons on average, but do not leave your rain protection behind: warmer here does not mean reliably dry.
How likely is it to reach 30°C?
About 11% of August days reach 30°C, so that level of heat is possible rather than typical. Days reaching 25°C are more common, at 47%. Pack for warm weather, with a plan to ease off during hotter afternoons.
How much sunshine can I expect?
August averages about 6.5 hours of sunshine within 14.3 hours of daylight. There is plenty of daylight for flexible plans, but do not confuse long days with clear skies: allow for time without sunshine as well as rain.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at Prague. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C