Prague records about 524mm of rain across roughly 88 wet days a year, which is a 24% chance on an average day. May is the wettest month at 77mm (15% of the annual total) and February the driest at 22mm. Local rain type: thunderstorms. May through August brings summer storms — carry an umbrella for afternoon showers. Winter is cold and dry with occasional snow that transforms the Old Town.
Chance of rain on an average day: 24%
Rainfall climatology for Prague. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 524mm |
| Rain days per year | 88 |
| Odds on an average day | 24% |
| Wettest month | May — 77mm over 13 days |
| Driest month | February — 22mm over 4 days |
| Rain type | thunderstorms |
| Best dry window | September and October bring comfortable temperatures with minimal rain — the best months for photography and walking tours. |
| Worst rain window | May and June see the most rainfall, though it comes as afternoon showers rather than all-day rain. |
May delivers 250% more rain than February (77mm vs 22mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 15% of the annual total, so rain in Prague is spread through the year — there is no season you can rely on being dry.
Prague rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 13 days in May against 4 in February — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 23mm | 4 | 13% | 2°C |
| February | 22mm | 4 | 13% | 2°C |
| March | 28mm | 5 | 17% | 5°C |
| April | 38mm | 6 | 20% | 11°C |
| May | 77mm | 13 | 43% | 16°C |
| June | 73mm | 12 | 40% | 22°C |
| July | 66mm | 11 | 37% | 25°C |
| August | 70mm | 12 | 40% | 25°C |
| September | 40mm | 7 | 23% | 22°C |
| October | 30mm | 5 | 17% | 16°C |
| November | 32mm | 5 | 17% | 11°C |
| December | 25mm | 4 | 13% | 5°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Prague we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Prague records rain on roughly 88 days a year — about a 24% chance on any given day — totalling around 524mm.
May, with about 77mm over 13 rain days. That is 15% of the entire year's rainfall in a single month.
February is the driest month at 22mm across roughly 4 days. September and October bring comfortable temperatures with minimal rain — the best months for photography and walking tours.
May through August brings summer storms — carry an umbrella for afternoon showers. Winter is cold and dry with occasional snow that transforms the Old Town.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.