| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.3° | -6.8° | 88.1mm | 19.2 | 2 |
| February | 1.2° | -6.6° | 65.6mm | 15.3 | 2 |
| March | 6° | -2.7° | 69.8mm | 14.4 | 19 |
| April | 12.8° | 2.6° | 83.6mm | 13.6 | 50 |
| May | 19.8° | 9.2° | 82.7mm | 12.5 | 74 |
| June | 24.4° | 14.7° | 85.1mm | 11.9 | 76 |
| July | 26.9° | 17.4° | 83.9mm | 11.3 | 77 |
| August | 26.4° | 16.8° | 79.8mm | 10.1 | 80 |
| September | 22.8° | 12.9° | 102.2mm | 10.9 | 78 |
| October | 15.7° | 7° | 105.9mm | 14.5 | 57 |
| November | 9° | 1.4° | 87.3mm | 14 | 36 |
| December | 3.2° | -3.2° | 97.7mm | 18 | 8 |
January in Amherst averages a daily high of 0.3°C with nights around -6.8°C. Expect roughly 19.2 wet days totalling 88.1mm. A hard month to visit for comfort alone.
February in Amherst averages a daily high of 1.2°C with nights around -6.6°C. Expect roughly 15.3 wet days totalling 65.6mm. A hard month to visit for comfort alone.
March in Amherst averages a daily high of 6°C with nights around -2.7°C. Expect roughly 14.4 wet days totalling 69.8mm. A hard month to visit for comfort alone.
April in Amherst averages a daily high of 12.8°C with nights around 2.6°C. Expect roughly 13.6 wet days totalling 83.6mm. Demanding conditions — pack for it and plan indoor options.
May in Amherst averages a daily high of 19.8°C with nights around 9.2°C. Expect roughly 12.5 wet days totalling 82.7mm. Generally workable, with some weather to plan around.
June in Amherst averages a daily high of 24.4°C with nights around 14.7°C. Expect roughly 11.9 wet days totalling 85.1mm. Comfortable conditions for being outdoors all day.
July in Amherst averages a daily high of 26.9°C with nights around 17.4°C. Expect roughly 11.3 wet days totalling 83.9mm. Comfortable conditions for being outdoors all day.
August in Amherst averages a daily high of 26.4°C with nights around 16.8°C. Expect roughly 10.1 wet days totalling 79.8mm. Comfortable conditions for being outdoors all day.
September in Amherst averages a daily high of 22.8°C with nights around 12.9°C. Expect roughly 10.9 wet days totalling 102.2mm. Comfortable conditions for being outdoors all day.
October in Amherst averages a daily high of 15.7°C with nights around 7°C. Expect roughly 14.5 wet days totalling 105.9mm. Generally workable, with some weather to plan around.
November in Amherst averages a daily high of 9°C with nights around 1.4°C. Expect roughly 14 wet days totalling 87.3mm. Demanding conditions — pack for it and plan indoor options.
December in Amherst averages a daily high of 3.2°C with nights around -3.2°C. Expect roughly 18 wet days totalling 97.7mm. 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. Amherst peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Amherst, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.9°C.
October is the wettest, averaging 105.9mm of rain across roughly 14.5 wet days.
January is the coolest month, with average daily highs around 0.3°C.