| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -3.6° | -13.2° | 67.4mm | 12.6 | 5 |
| February | -2.1° | -12.8° | 70.8mm | 11.8 | 6 |
| March | 3° | -7.2° | 85.9mm | 12.3 | 7 |
| April | 10.4° | -0.4° | 88.7mm | 12.7 | 40 |
| May | 17.7° | 5° | 78mm | 13.4 | 66 |
| June | 22.2° | 10.6° | 98.5mm | 13 | 74 |
| July | 25.8° | 14.3° | 95.9mm | 12.7 | 75 |
| August | 25° | 13.6° | 90.5mm | 10.9 | 78 |
| September | 20.9° | 9.1° | 93.4mm | 9.8 | 80 |
| October | 13.9° | 3.8° | 106.2mm | 12.2 | 56 |
| November | 6.4° | -1.9° | 102.6mm | 11.6 | 27 |
| December | 0.1° | -8.1° | 106.1mm | 14.7 | 1 |
January in Fredericton averages a daily high of -3.6°C with nights around -13.2°C. Expect roughly 12.6 wet days totalling 67.4mm. A hard month to visit for comfort alone.
February in Fredericton averages a daily high of -2.1°C with nights around -12.8°C. Expect roughly 11.8 wet days totalling 70.8mm. A hard month to visit for comfort alone.
March in Fredericton averages a daily high of 3°C with nights around -7.2°C. Expect roughly 12.3 wet days totalling 85.9mm. A hard month to visit for comfort alone.
April in Fredericton averages a daily high of 10.4°C with nights around -0.4°C. Expect roughly 12.7 wet days totalling 88.7mm. Demanding conditions — pack for it and plan indoor options.
May in Fredericton averages a daily high of 17.7°C with nights around 5°C. Expect roughly 13.4 wet days totalling 78mm. Generally workable, with some weather to plan around.
June in Fredericton averages a daily high of 22.2°C with nights around 10.6°C. Expect roughly 13 wet days totalling 98.5mm. Generally workable, with some weather to plan around.
July in Fredericton averages a daily high of 25.8°C with nights around 14.3°C. Expect roughly 12.7 wet days totalling 95.9mm. Comfortable conditions for being outdoors all day.
August in Fredericton averages a daily high of 25°C with nights around 13.6°C. Expect roughly 10.9 wet days totalling 90.5mm. Comfortable conditions for being outdoors all day.
September in Fredericton averages a daily high of 20.9°C with nights around 9.1°C. Expect roughly 9.8 wet days totalling 93.4mm. Comfortable conditions for being outdoors all day.
October in Fredericton averages a daily high of 13.9°C with nights around 3.8°C. Expect roughly 12.2 wet days totalling 106.2mm. Generally workable, with some weather to plan around.
November in Fredericton averages a daily high of 6.4°C with nights around -1.9°C. Expect roughly 11.6 wet days totalling 102.6mm. A hard month to visit for comfort alone.
December in Fredericton averages a daily high of 0.1°C with nights around -8.1°C. Expect roughly 14.7 wet days totalling 106.1mm. 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. Fredericton peaks at 80.
Based on 30 years of records, June–September scores highest for comfort in Fredericton, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 25.8°C.
October is the wettest, averaging 106.2mm of rain across roughly 12.2 wet days.
January is the coolest month, with average daily highs around -3.6°C.