| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.5° | 1.5° | 63.4mm | 16.8 | 29 |
| February | 8.3° | 1.8° | 53.5mm | 14.2 | 34 |
| March | 10° | 2.9° | 48.5mm | 14.1 | 40 |
| April | 12.4° | 4.6° | 40.6mm | 11.6 | 52 |
| May | 15.2° | 7.2° | 53.4mm | 13.9 | 57 |
| June | 17.7° | 10.1° | 65.4mm | 13.4 | 66 |
| July | 19.5° | 11.7° | 74.9mm | 15.1 | 68 |
| August | 19.2° | 11.6° | 71.9mm | 14.2 | 69 |
| September | 17° | 9.8° | 55mm | 13.5 | 63 |
| October | 13.7° | 7° | 80.7mm | 16.5 | 50 |
| November | 10° | 3.6° | 65.1mm | 15.8 | 38 |
| December | 7.6° | 1.4° | 68.8mm | 17 | 29 |
January in Cumbernauld averages a daily high of 7.5°C with nights around 1.5°C. Expect roughly 16.8 wet days totalling 63.4mm. A hard month to visit for comfort alone.
February in Cumbernauld averages a daily high of 8.3°C with nights around 1.8°C. Expect roughly 14.2 wet days totalling 53.5mm. A hard month to visit for comfort alone.
March in Cumbernauld averages a daily high of 10°C with nights around 2.9°C. Expect roughly 14.1 wet days totalling 48.5mm. Demanding conditions — pack for it and plan indoor options.
April in Cumbernauld averages a daily high of 12.4°C with nights around 4.6°C. Expect roughly 11.6 wet days totalling 40.6mm. Demanding conditions — pack for it and plan indoor options.
May in Cumbernauld averages a daily high of 15.2°C with nights around 7.2°C. Expect roughly 13.9 wet days totalling 53.4mm. Generally workable, with some weather to plan around.
June in Cumbernauld averages a daily high of 17.7°C with nights around 10.1°C. Expect roughly 13.4 wet days totalling 65.4mm. Generally workable, with some weather to plan around.
July in Cumbernauld averages a daily high of 19.5°C with nights around 11.7°C. Expect roughly 15.1 wet days totalling 74.9mm. Generally workable, with some weather to plan around.
August in Cumbernauld averages a daily high of 19.2°C with nights around 11.6°C. Expect roughly 14.2 wet days totalling 71.9mm. Generally workable, with some weather to plan around.
September in Cumbernauld averages a daily high of 17°C with nights around 9.8°C. Expect roughly 13.5 wet days totalling 55mm. Generally workable, with some weather to plan around.
October in Cumbernauld averages a daily high of 13.7°C with nights around 7°C. Expect roughly 16.5 wet days totalling 80.7mm. Demanding conditions — pack for it and plan indoor options.
November in Cumbernauld averages a daily high of 10°C with nights around 3.6°C. Expect roughly 15.8 wet days totalling 65.1mm. Demanding conditions — pack for it and plan indoor options.
December in Cumbernauld averages a daily high of 7.6°C with nights around 1.4°C. Expect roughly 17 wet days totalling 68.8mm. 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. Cumbernauld peaks at 69.
Based on 30 years of records, June–September scores highest for comfort in Cumbernauld, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 19.5°C.
October is the wettest, averaging 80.7mm of rain across roughly 16.5 wet days.
January is the coolest month, with average daily highs around 7.5°C.