Prague, Czech Republic skyline

Prague Weather in September

Prague, Czech Republic in September: how the month usually turns out, from 2006–2025 averages.

A typical September day in Prague peaks at 20.2°C (68.4°F) and drops to 11.2°C (52.2°F) overnight; expect about 9 rainy days (59 mm in total) and 8.8 hours of sunshine daily.

Avg high

20.2°C (68.4°F)

Avg low

11.2°C (52.2°F)

Rainfall

59 mm (2.3 in)

Rainy days

9 days

Sunshine

8.8 h / day

Humidity

72%

September vs the rest of the year

On temperature, September beats 8 of 11 other months, and it ranks as the 5th wettest month of the year.

MonthAvg highvs SeptemberRainRainy days
January3.2°C (37.8°F)−17°C (−30.6°F)42 mm11
February5.2°C (41.4°F)−15°C (−27°F)34 mm8
March9.7°C (49.5°F)−10.5°C (−18.9°F)38 mm10
April15.1°C (59.2°F)−5.1°C (−9.2°F)40 mm9
May19.1°C (66.4°F)−1.1°C (−2°F)71 mm13
June23.5°C (74.3°F)+3.3°C (+5.9°F)77 mm12
July25.5°C (77.9°F)+5.3°C (+9.5°F)73 mm12
August24.8°C (76.6°F)+4.6°C (+8.3°F)82 mm11
September20.2°C (68.4°F)—59 mm9
October14.5°C (58.1°F)−5.7°C (−10.3°F)47 mm10
November8.3°C (46.9°F)−11.9°C (−21.4°F)40 mm9
December4.5°C (40.1°F)−15.7°C (−28.3°F)42 mm10

What September feels like in Prague

Early autumn arrives in Prague with September. The middle of the day is pleasantly mild. After sunset it cools off noticeably — nights are cool. Moist air is typical, yet it seldom feels heavy at this time of year.

Rain in Prague in September

Showers are a regular feature, arriving about one day in 3. A rainy day brings about 6.5 mm (0.3 in) on average — steady rain rather than a passing shower. That is heavier than Prague's usual 5.2 mm per rainy day across the year.

Daylight and sunshine in September

In mid-September, sunrise is at about 6:36 am and sunset at about 7:19 pm (local time) — 12 h 42 min of daylight. Days are getting shorter: 1 h 51 min less daylight than in mid-August. Measured sunshine covers about 69% of the daylight — there are plenty of bright spells.

How September compares to the rest of the year

September is the 4th warmest month of the year in Prague. Compared with August, afternoons are 4.6°C (8.3°F) cooler, with 23 mm less rain. Temperatures keep falling into October. The next month's average high: 14.5°C (58.1°F).

Who September suits

  • Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
  • Parks & outdoor: a good fit — comfortable for long walks and picnics.

Tips for visiting Prague in September

Versatile Layers

Days are noticeably warmer than nights — layers you can add or remove.

Rain Protection

Keep a small umbrella in your bag and wear shoes that cope with puddles.

Sunglasses

Plenty of sun, so bring sunglasses and a cap.

Quick questions

How warm is Prague in September?

Afternoons average 20.2°C (68.4°F) and nights about 11.2°C (52.2°F) — mild by most people's standards. It is the 4th warmest month of the year.

Does it rain a lot in Prague in September?

Yes, fairly — rain falls about one day in 3 and totals about 59 mm, so an umbrella is worth carrying.

What should I wear in Prague in September?

Pack versatile layers, rain protection and sunglasses. Bring something extra for the cooler evenings.

Is September or October better for visiting Prague?

September scores better on our climate ranking (#1 of 12 vs #3), rated Great against Good. October is cooler and has more rainy days.

Is September a good time to visit Prague?

Great

Great — comfortable temperatures, some rainy days (about 9), plenty of sunshine (8.8 h a day). Within Prague's own year, September ranks #1 of 12 — one of the 3 best months to visit.

September in other Czech Republic cities

Warmer or drier places in September

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Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Prague weather by month.