Your May weather guide
MildWeather in Prague in May
May is a good time for Prague if you want mild weather for walking rather than reliable warmth. Average daytime highs are around 19°C, but nights fall to about 9°C, so evenings need an extra layer. The main catch is rain, with about 13 rainy days during the month. For a UK traveller, it offers comfortable conditions for exploring on foot, provided you pack for showers and keep outdoor plans flexible.
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
- 19.2°C
- 9 in 10 days stay below 25°C
- Average night-time low
- 9.2°C
- coldest 10% of nights: 5°C or lower
- Compared with London
- +2.6°C
- London averages 16.6°C in May
- Sunshine per day (est.)
- 6.0h
- 39% of 15.2 h of daylight
- Rainy days (1 mm+)
- 13
- 67 mm over the month
- Humidity
- 69%
- Days over 25°C
- 11%
- 1% over 30°C
- Record high 1991-2020
- 31.5°C
- 2017-05-30
- Record low 1991-2020
- -0.6°C
- 2011-05-04
- 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 May compares
May is the 5th warmest month of the year in Prague and ranks 129th of 134 destinations we compare for May - see where else is hot in May. Against London's average high of 16.6°C in May, Prague is 2.6°C warmer by day and 0.9°C warmer at night.
Daytime and night-time in May
The typical May day in Prague peaks at 19.2°C, but that is an average: the warmest 10% of days reach 25.0°C or more. Roughly 1 in 10 days top 25°C and 1 in 167 pass 30°C. Nights average 9.2°C; one night in ten drops to 5.1°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest May day here reached 31.5°C (2017-05-30) and the coldest night -0.6°C (2011-05-04).
Rain in May
Wet (more than 8 rainy days): about 13 days with 1 mm or more, 67 mm in total. Year to year it varies a lot - the wettest May was 1996 with 127 mm, the driest 1992 with 10 mm. Humidity averages 69%.
Sunshine and daylight
Around 6.0 hours of sunshine a day (estimated from cloud cover), 15.2 hours of daylight: the sun rises about 05:16 and sets about 20:42 local time in mid-May. Average cloud cover is 60%.
Is May a good time to visit Prague?
May is not the strongest month here: mild days and frequent rain. The best months for Prague on our scoring are August, July, June.
Comfortable afternoons, cool evenings
The typical afternoon is mild enough for walking without the heat becoming the main consideration. A light top may suit warmer spells, but a jumper and jacket give you more flexibility when temperatures dip. Do not pack as though summer has already arrived: the coldest 10% of nights fall to around 5°C or below, which can make sitting outdoors feel chilly. At the warmer end, 10% of days reach 25°C, so lighter clothing still deserves space in your bag. May suits travellers happy to adjust their layers through the day more than those looking for consistently warm evenings.
Long daylight, but keep a rain plan
May gives you about 15.2 hours of daylight, leaving plenty of scope to move outdoor time around the weather. That does not mean clear skies throughout: average sunshine is about 6 hours a day, and rain is a meaningful part of the month. Bring a waterproof jacket and shoes you are comfortable walking in when pavements are wet. An umbrella is useful too, especially if you prefer a lighter outer layer. Keep some indoor time flexible rather than committing every day to being outside. The balance is appealing for a city break, but less suitable if your enjoyment depends on dry weather throughout.
A little perspective
Prague through the year
May 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% |
| MaySelected | 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% |
| Augustbest | 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 May
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Prague in May FAQs
Plain answers, grounded in the averages.
Is Prague hot in May?
Prague is mild in May: the average daytime high is 19.2°C and nights average 9.2°C. Roughly 1 in 10 May days reach 25°C.
How much does it rain in Prague in May?
Prague sees about 13 rainy days (1 mm or more) and 67 mm of rain in a typical May. The wettest May between 1991 and 2020 was 1996 (127 mm) and the driest was 1992 (10 mm).
How sunny is Prague in May?
Prague gets around 6.0 hours of sunshine a day in May out of 15.2 hours of daylight (estimated from average cloud cover).
How does Prague compare with the UK in May?
Prague is on average 2.6°C warmer than London by day in May (19.2°C against 16.6°C).
What is the hottest May on record in Prague?
Between 1991 and 2020 the hottest May day in Prague reached 31.5°C on 2017-05-30, and the coldest night dropped to -0.6°C on 2011-05-04.
Is Prague warmer than London in May?
Yes. Prague's average daytime high is 19.2°C, compared with 16.6°C in London, a difference of 2.6°C. That is a modest improvement rather than a switch to summer weather, so keep a jacket in your packing.
Does Prague get hot in May?
It can, but heat is not the usual pattern. About 10% of days reach 25°C, while only 1% reach 30°C. Pack something light for a warm afternoon, but prioritise layers over a wardrobe intended mainly for hot weather.
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