| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 4.8° | -3.1° | 89.1mm | 11 | 22 |
| February | 6.5° | -2.2° | 75.4mm | 10.1 | 30 |
| March | 11.1° | 1.6° | 99.6mm | 10.6 | 50 |
| April | 17.2° | 7° | 103.1mm | 11.3 | 68 |
| May | 22.7° | 12.4° | 100.7mm | 11.6 | 77 |
| June | 27.8° | 17.8° | 109.1mm | 10.9 | 75 |
| July | 30.8° | 21° | 121.5mm | 10.2 | 64 |
| August | 29.6° | 20.3° | 108.1mm | 9.8 | 70 |
| September | 25.7° | 16.3° | 104.6mm | 8.6 | 83 |
| October | 19.3° | 9.9° | 103.5mm | 9.5 | 79 |
| November | 13° | 4° | 81.2mm | 8.8 | 60 |
| December | 7.4° | -0.2° | 106.4mm | 11.2 | 34 |
January in Bayonne averages a daily high of 4.8°C with nights around -3.1°C. Expect roughly 11 wet days totalling 89.1mm. A hard month to visit for comfort alone.
February in Bayonne averages a daily high of 6.5°C with nights around -2.2°C. Expect roughly 10.1 wet days totalling 75.4mm. A hard month to visit for comfort alone.
March in Bayonne averages a daily high of 11.1°C with nights around 1.6°C. Expect roughly 10.6 wet days totalling 99.6mm. Demanding conditions — pack for it and plan indoor options.
April in Bayonne averages a daily high of 17.2°C with nights around 7°C. Expect roughly 11.3 wet days totalling 103.1mm. Generally workable, with some weather to plan around.
May in Bayonne averages a daily high of 22.7°C with nights around 12.4°C. Expect roughly 11.6 wet days totalling 100.7mm. Comfortable conditions for being outdoors all day.
June in Bayonne averages a daily high of 27.8°C with nights around 17.8°C. Expect roughly 10.9 wet days totalling 109.1mm. Comfortable conditions for being outdoors all day.
July in Bayonne averages a daily high of 30.8°C with nights around 21°C. Expect roughly 10.2 wet days totalling 121.5mm. Generally workable, with some weather to plan around.
August in Bayonne averages a daily high of 29.6°C with nights around 20.3°C. Expect roughly 9.8 wet days totalling 108.1mm. Generally workable, with some weather to plan around.
September in Bayonne averages a daily high of 25.7°C with nights around 16.3°C. Expect roughly 8.6 wet days totalling 104.6mm. Comfortable conditions for being outdoors all day.
October in Bayonne averages a daily high of 19.3°C with nights around 9.9°C. Expect roughly 9.5 wet days totalling 103.5mm. Comfortable conditions for being outdoors all day.
November in Bayonne averages a daily high of 13°C with nights around 4°C. Expect roughly 8.8 wet days totalling 81.2mm. Generally workable, with some weather to plan around.
December in Bayonne averages a daily high of 7.4°C with nights around -0.2°C. Expect roughly 11.2 wet days totalling 106.4mm. 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. Bayonne peaks at 83.
Based on 30 years of records, May–June scores highest for comfort in Bayonne, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 30.8°C.
July is the wettest, averaging 121.5mm of rain across roughly 10.2 wet days.
January is the coolest month, with average daily highs around 4.8°C.