June
Best time
21.2°C / 12.8°C
11 rain days
mild, rainy
- comfortable temperatures (avg high 21.2°C / 70°F)
Best time to visit Rotterdam
Rotterdam, Netherlands — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: June, September, May.
Best · June & September
About Rotterdam
Rotterdam is the second-largest city in the Netherlands by population and the largest by area (319.4 km2). It is in the province of South Holland, part of the North Sea mouth of the Rhine–Meuse–Scheldt delta, via the New Meuse inland shipping channel, dug to connect to the Meuse at first and now to the Rhine.
— condensed from Wikipedia
Best months to visit
September
Best time
19.7°C / 12.3°C
11 rain days
mild, rainy
- comfortable temperatures (avg high 19.7°C / 67°F)
May
Best time
17.4°C / 8.8°C
12 rain days
mild, rainy
July
Best time
22.3°C / 14.4°C
14 rain days
warm, rainy
- comfortable temperatures (avg high 22.3°C / 72°F)
- warm evenings without humidity overload
August
Best time
22.3°C / 14.5°C
14 rain days
warm, rainy
- comfortable temperatures (avg high 22.3°C / 72°F)
- warm evenings without humidity overload
October
Best time
15.4°C / 9.6°C
14 rain days
cool, rainy
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OK — shoulder months
April
OK
13.7°C / 5.3°C
10 rain days
cool, rainy
- manageable rain (10 days)
November
OK
10.5°C / 5.6°C
15 rain days
cool, rainy
March
OK
10.5°C / 3.3°C
13 rain days
cool, rainy
February
OK
8.1°C / 2.2°C
12 rain days
chilly, rainy
December
OK
8°C / 3.8°C
15 rain days
chilly, rainy
January
OK
6.9°C / 2.5°C
16 rain days
chilly, very wet
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.
🇳🇱 Dutch survival phrases
The 16 phrases that will earn you smiles, food, and help when you need it. English-speaking travellers — start with the first 4 and add the rest as needed.
Hello
Hallo
HAH-loh
Thank you
Dank je / Dank u
dank yuh / dank oo
Please
Alstublieft
ahl-stoo-BLEEFT
Yes / No
Ja / Nee
yah / nay
Excuse me
Pardon / Sorry
par-DOHN
Do you speak English?
Spreekt u Engels?
spraykt oo ENG-uls
I don't understand
Ik begrijp het niet
ik buh-GHRYP huht neet
How much?
Hoeveel?
HOO-vayl
The bill, please
De rekening, alstublieft
duh RAY-kun-ing
Water
Water
VAH-tur
Where is…?
Waar is…?
vahr is
Bathroom
Toilet
twah-LET
Help!
Help!
help
Call the police
Bel de politie
bel duh po-LEET-see
I need a doctor
Ik heb een dokter nodig
ik hep un DOK-ter NOH-dikh
I'm allergic to…
Ik ben allergisch voor…
ik ben ah-LEHR-ghees vor
Pronunciations are rough English approximations — they'll get you understood, even if your tones aren't perfect.