| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 6.5° | 1.4° | 74.9mm | 16.5 | 26 |
| February | 7.7° | 1.6° | 70.3mm | 14.4 | 31 |
| March | 10.4° | 2.7° | 56.7mm | 13.2 | 43 |
| April | 14.3° | 4.8° | 45mm | 11.5 | 59 |
| May | 18° | 8.2° | 61.5mm | 11.9 | 70 |
| June | 21° | 11.3° | 65.8mm | 11.6 | 77 |
| July | 22.6° | 13.4° | 79.3mm | 13.7 | 73 |
| August | 22.8° | 13.4° | 88.3mm | 12.9 | 74 |
| September | 19.7° | 11° | 89.1mm | 13.5 | 72 |
| October | 15.4° | 8.1° | 87.7mm | 15.6 | 55 |
| November | 10.4° | 4.6° | 90.8mm | 17.8 | 39 |
| December | 7.2° | 2.1° | 84.1mm | 17.6 | 29 |
January in Zoetermeer averages a daily high of 6.5°C with nights around 1.4°C. Expect roughly 16.5 wet days totalling 74.9mm. A hard month to visit for comfort alone.
February in Zoetermeer averages a daily high of 7.7°C with nights around 1.6°C. Expect roughly 14.4 wet days totalling 70.3mm. A hard month to visit for comfort alone.
March in Zoetermeer averages a daily high of 10.4°C with nights around 2.7°C. Expect roughly 13.2 wet days totalling 56.7mm. Demanding conditions — pack for it and plan indoor options.
April in Zoetermeer averages a daily high of 14.3°C with nights around 4.8°C. Expect roughly 11.5 wet days totalling 45mm. Generally workable, with some weather to plan around.
May in Zoetermeer averages a daily high of 18°C with nights around 8.2°C. Expect roughly 11.9 wet days totalling 61.5mm. Generally workable, with some weather to plan around.
June in Zoetermeer averages a daily high of 21°C with nights around 11.3°C. Expect roughly 11.6 wet days totalling 65.8mm. Comfortable conditions for being outdoors all day.
July in Zoetermeer averages a daily high of 22.6°C with nights around 13.4°C. Expect roughly 13.7 wet days totalling 79.3mm. Generally workable, with some weather to plan around.
August in Zoetermeer averages a daily high of 22.8°C with nights around 13.4°C. Expect roughly 12.9 wet days totalling 88.3mm. Generally workable, with some weather to plan around.
September in Zoetermeer averages a daily high of 19.7°C with nights around 11°C. Expect roughly 13.5 wet days totalling 89.1mm. Generally workable, with some weather to plan around.
October in Zoetermeer averages a daily high of 15.4°C with nights around 8.1°C. Expect roughly 15.6 wet days totalling 87.7mm. Generally workable, with some weather to plan around.
November in Zoetermeer averages a daily high of 10.4°C with nights around 4.6°C. Expect roughly 17.8 wet days totalling 90.8mm. Demanding conditions — pack for it and plan indoor options.
December in Zoetermeer averages a daily high of 7.2°C with nights around 2.1°C. Expect roughly 17.6 wet days totalling 84.1mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Zoetermeer peaks at 77.
Based on 30 years of records, May–September scores highest for comfort in Zoetermeer, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 22.8°C.
November is the wettest, averaging 90.8mm of rain across roughly 17.8 wet days.
January is the coolest month, with average daily highs around 6.5°C.