| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 3° | -7° | 72.9mm | 10 | 12 |
| February | 4.6° | -6° | 70.6mm | 8.8 | 21 |
| March | 9.3° | -1.8° | 96.3mm | 9.8 | 40 |
| April | 15.8° | 3.5° | 104.7mm | 10.7 | 65 |
| May | 21.7° | 9° | 93.9mm | 12.9 | 74 |
| June | 26.2° | 14° | 109.8mm | 12.2 | 76 |
| July | 29.2° | 17.4° | 98.3mm | 11.4 | 68 |
| August | 28.4° | 16.6° | 94.1mm | 11.5 | 71 |
| September | 24.6° | 12.4° | 117.4mm | 11.2 | 78 |
| October | 18.1° | 5.9° | 110.3mm | 11.7 | 71 |
| November | 11.9° | 0.3° | 83mm | 9.7 | 52 |
| December | 5.8° | -3.8° | 110.3mm | 11.1 | 24 |
January in Meriden averages a daily high of 3°C with nights around -7°C. Expect roughly 10 wet days totalling 72.9mm. A hard month to visit for comfort alone.
February in Meriden averages a daily high of 4.6°C with nights around -6°C. Expect roughly 8.8 wet days totalling 70.6mm. A hard month to visit for comfort alone.
March in Meriden averages a daily high of 9.3°C with nights around -1.8°C. Expect roughly 9.8 wet days totalling 96.3mm. Demanding conditions — pack for it and plan indoor options.
April in Meriden averages a daily high of 15.8°C with nights around 3.5°C. Expect roughly 10.7 wet days totalling 104.7mm. Generally workable, with some weather to plan around.
May in Meriden averages a daily high of 21.7°C with nights around 9°C. Expect roughly 12.9 wet days totalling 93.9mm. Generally workable, with some weather to plan around.
June in Meriden averages a daily high of 26.2°C with nights around 14°C. Expect roughly 12.2 wet days totalling 109.8mm. Comfortable conditions for being outdoors all day.
July in Meriden averages a daily high of 29.2°C with nights around 17.4°C. Expect roughly 11.4 wet days totalling 98.3mm. Generally workable, with some weather to plan around.
August in Meriden averages a daily high of 28.4°C with nights around 16.6°C. Expect roughly 11.5 wet days totalling 94.1mm. Generally workable, with some weather to plan around.
September in Meriden averages a daily high of 24.6°C with nights around 12.4°C. Expect roughly 11.2 wet days totalling 117.4mm. Comfortable conditions for being outdoors all day.
October in Meriden averages a daily high of 18.1°C with nights around 5.9°C. Expect roughly 11.7 wet days totalling 110.3mm. Generally workable, with some weather to plan around.
November in Meriden averages a daily high of 11.9°C with nights around 0.3°C. Expect roughly 9.7 wet days totalling 83mm. Demanding conditions — pack for it and plan indoor options.
December in Meriden averages a daily high of 5.8°C with nights around -3.8°C. Expect roughly 11.1 wet days totalling 110.3mm. 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. Meriden peaks at 78.
Based on 30 years of records, August–October scores highest for comfort in Meriden, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.2°C.
September is the wettest, averaging 117.4mm of rain across roughly 11.2 wet days.
January is the coolest month, with average daily highs around 3°C.