| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 2.2° | -7.9° | 88.7mm | 11.1 | 8 |
| February | 3.8° | -7.5° | 86mm | 9.5 | 15 |
| March | 7.9° | -3.5° | 121.7mm | 10.7 | 32 |
| April | 14.3° | 1.8° | 109.6mm | 12.5 | 56 |
| May | 20.1° | 7.3° | 97.6mm | 12.7 | 75 |
| June | 25° | 12.6° | 102.7mm | 11.5 | 77 |
| July | 28.4° | 16.4° | 99mm | 10.7 | 73 |
| August | 27.6° | 15.2° | 93mm | 9.8 | 78 |
| September | 23.6° | 11.1° | 96mm | 9.1 | 82 |
| October | 17° | 4.9° | 136.5mm | 11.4 | 68 |
| November | 10.7° | -0.6° | 92.2mm | 10.4 | 46 |
| December | 5° | -5° | 114.5mm | 11.3 | 19 |
January in Haverhill averages a daily high of 2.2°C with nights around -7.9°C. Expect roughly 11.1 wet days totalling 88.7mm. A hard month to visit for comfort alone.
February in Haverhill averages a daily high of 3.8°C with nights around -7.5°C. Expect roughly 9.5 wet days totalling 86mm. A hard month to visit for comfort alone.
March in Haverhill averages a daily high of 7.9°C with nights around -3.5°C. Expect roughly 10.7 wet days totalling 121.7mm. A hard month to visit for comfort alone.
April in Haverhill averages a daily high of 14.3°C with nights around 1.8°C. Expect roughly 12.5 wet days totalling 109.6mm. Generally workable, with some weather to plan around.
May in Haverhill averages a daily high of 20.1°C with nights around 7.3°C. Expect roughly 12.7 wet days totalling 97.6mm. Comfortable conditions for being outdoors all day.
June in Haverhill averages a daily high of 25°C with nights around 12.6°C. Expect roughly 11.5 wet days totalling 102.7mm. Comfortable conditions for being outdoors all day.
July in Haverhill averages a daily high of 28.4°C with nights around 16.4°C. Expect roughly 10.7 wet days totalling 99mm. Generally workable, with some weather to plan around.
August in Haverhill averages a daily high of 27.6°C with nights around 15.2°C. Expect roughly 9.8 wet days totalling 93mm. Comfortable conditions for being outdoors all day.
September in Haverhill averages a daily high of 23.6°C with nights around 11.1°C. Expect roughly 9.1 wet days totalling 96mm. Comfortable conditions for being outdoors all day.
October in Haverhill averages a daily high of 17°C with nights around 4.9°C. Expect roughly 11.4 wet days totalling 136.5mm. Generally workable, with some weather to plan around.
November in Haverhill averages a daily high of 10.7°C with nights around -0.6°C. Expect roughly 10.4 wet days totalling 92.2mm. Demanding conditions — pack for it and plan indoor options.
December in Haverhill averages a daily high of 5°C with nights around -5°C. Expect roughly 11.3 wet days totalling 114.5mm. 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. Haverhill peaks at 82.
Based on 30 years of records, May–June scores highest for comfort in Haverhill, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.4°C.
October is the wettest, averaging 136.5mm of rain across roughly 11.4 wet days.
January is the coolest month, with average daily highs around 2.2°C.