Outdoor Concert Weather

Choose the venue, the date and the start time, and the checker scores the weather for 3 hours of the show.

What matters most for an open-air concert

For a concert, wind counts 1.5 times: above 15 km/h it adds 1.5 points, above 25 km/h 3 points and above 40 km/h 6 points, which is high risk by itself. Strong wind is what stops stages, rigging and sound first. Rain counts at its normal weight: every 10% chance of rain adds 1 point, so a 40% chance adds 4.

Heat and cold count 0.8 times (1.6 points above 32 °C, 3.2 above 38 °C, 0.8 below 10 °C and 2.4 below 5 °C) and humidity 0.6 times (0.6 above 60%, 1.2 above 80%). Up to 3 is low risk, up to 6 moderate and above 6 high. Our monthly table has no wind data, so it shows rain, heat and humidity only; the checker adds the forecast wind for your hours.

Worked example: 10% chance of rain, 30 km/h of wind, 22 °C and 55% humidity give 1 + 3 + 0 + 0 = 4 points, a moderate risk for a concert, mostly because of the wind. If the wind drops to 12 km/h, the risk falls to 1 (low).

Lowest and highest concert risk in 10 cities

Concert risk for an average day in each month, from the 2006–2025 averages (chance of rain = rainy days divided by 30, typical afternoon high and humidity, no wind).

City	Lowest risk	Highest risk
Lisbon	July · 1.4 (low)	December · 5.5 (moderate)
Rome	July · 3 (low)	November · 6.2 (high)
Barcelona	July · 3.4 (moderate)	September · 5.6 (moderate)
Madrid	September · 2.2 (low)	January · 4.6 (moderate)
Paris	September · 4.9 (moderate)	January · 7.3 (high)
London	September · 5.2 (moderate)	January · 7.1 (high)
Amsterdam	April · 5.8 (moderate)	November · 8 (high)
Berlin	September · 5.1 (moderate)	January · 8.2 (high)
Vienna	February · 4.4 (moderate)	December · 7.3 (high)
New York	November · 3.3 (moderate)	January · 6 (moderate)

The lowest risk is in Lisbon in July (1.4). 3 of 10 cities have at least one low-risk month. Wind is not in these averages, so check it in the forecast for your show.

Concert weather checklist

Enter the time the doors open and check the window until the end of the show.
Above 25 km/h of wind, ask the organiser about the wind limit for the stage.
From about 30% chance of rain, bring a light rain layer; umbrellas are often not allowed.
Check again on the day: wind forecasts change faster than temperature.

FAQ

What wind speed is a problem for an outdoor concert?

For concerts the checker adds 1.5 points above 15 km/h, 3 above 25 km/h and 6 above 40 km/h, because stages and sound suffer first.

Will an outdoor concert go ahead in the rain?

Many do, but rain adds 1 risk point for every 10% chance. From about 40% it is worth packing a rain jacket and checking the organiser’s rules.

How far ahead can I check the weather for a concert?

Up to 10 days ahead with the hourly forecast. The checker also shows nearby days if you can choose between dates.

When is the best time of year for open-air concerts?

In our table the lowest concert risk comes in the dry summer months of southern cities such as Lisbon and Madrid; in northern cities the risk stays moderate or high most of the year.