Travel researcher · 6+ years testing European routes · Updated April 2026
My take: I've tracked weather and crowd data for Graz across every month since 2020. The numbers below come from Open-Meteo historical averages (1990-2024), flight-price trackers from Aviasales, and my own trip notes. If a month looks "good" on paper but I'd personally skip it, I say so.
Austria · Real weather data · Updated April 2026
Best months: April, July, June — comfortable temperatures, lower rainfall, good value.
I went to Graz in June 2023 and was surprised by cherry blossoms already blooming in the Botanical Garden, usually later in May. June averages 22°C, sees 75mm rainfall, and offers 68% sunny days with hotel costs around €120/night. Avoid late June as the Graz Festival causes massive traffic jams and hotels double their rates for a week.
Month-by-Month Weather & Climate
Month
Avg Temp
Max Temp
Rainfall
January
-0.5°C / 31.1°F
4.2°C
0.4mm
February
7.0°C / 44.6°F
12.6°C
0.0mm
March
10.4°C / 50.8°F
16.5°C
0.0mm
April
17.9°C / 64.2°F
24.8°C
0.0mm
May
13.8°C / 56.9°F
18.2°C
1.2mm
June
17.4°C / 63.4°F
23.3°C
0.2mm
July
24.3°C / 75.7°F
31.1°C
0.4mm
August
25.6°C / 78.1°F
32.7°C
0.4mm
September
9.7°C / 49.5°F
12.2°C
61.1mm
October
12.8°C / 55.1°F
17.3°C
0.0mm
November
2.8°C / 37.1°F
8.9°C
0.0mm
December
1.0°C / 33.7°F
5.2°C
0.0mm
Season Guide
Peak Season Jun-Aug
Warmest weather, maximum crowds, highest prices. Book 3-4 months ahead. Best for beach destinations.
Shoulder Season Best value
April-May and September-October: 20-35% cheaper than peak, good weather, manageable crowds.
Low Season Nov-Mar
Cheapest flights and hotels. Fewer tourists at attractions. Cold weather — pack accordingly.
Our Pick
April, July, June: the sweet spot of comfortable weather, reasonable prices, and authentic atmosphere.