Prague · Month comparison
May vs September
May ranks #1 overall vs September at #2. The sweet spot — 21°C, green parks, long evenings, and still 25% below peak prices.
May
#1 of 12 months
Best match
The sweet spot — 21°C, green parks, long evenings, and still 25% below peak prices.
- ↑Best weather-to-price ratio in the calendar: 21°C, 8 hours of sunshine, and hotel rates 25% below July–August
- ↑Prague Spring Music Festival: international classical music across the historic venues — the city's most celebrated annual cultural event
September
#2 of 12 months
Best match
The best month — summer warmth, autumn gold beginning, and the crowds starting to thin.
- ↑Golden morning light on the castle: September's lower sun angle gives Charles Bridge and the Vltava their most photogenic quality of the year
- ↑21°C and long days still: warm enough for terraces and river cruises without summer crowds or prices
| Factor | May | September |
|---|---|---|
| Weather score | 8 | 8 |
| Value score | 6 | 5 |
| Crowd score | 6 | 6 |
| Events score | 7 | 7 |
| Atmosphere | 9 | 9 |
| Avg high temp | 21°C | 21°C |
| Monthly rain | 72mm | 41mm |
| Daily sunshine | 8hrs | 7hrs |
May trade-offs
- ↓Crowds building: Old Town noticeably busier than April, and Charles Bridge congested at midday
- ↓72mm of rainfall — the greenest month is also the wettest; afternoon thunderstorms possible, carry a poncho
- ↓Book 4–6 weeks ahead; May is now the most in-demand shoulder month and fills fast
September trade-offs
- ↓41mm of rain still possible across the month — the odd grey afternoon but nothing sustained
- ↓Business travel picking up as schools restart — midweek hotel prices can remain elevated
- ↓River fog possible in early mornings — beautiful, but a risk for planned photography sessions
Scores compare months within Prague. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →