| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.3° | -0.4° | 50.4mm | 13.8 | 22 |
| February | 8° | 0.5° | 45.5mm | 12.3 | 35 |
| March | 12.3° | 2.5° | 47.3mm | 12 | 51 |
| April | 17.3° | 5.5° | 43.3mm | 11 | 69 |
| May | 21.4° | 9.9° | 69.5mm | 12.3 | 75 |
| June | 25.4° | 13.6° | 64.1mm | 11.4 | 77 |
| July | 26.9° | 15.2° | 66.3mm | 12 | 76 |
| August | 26.7° | 15° | 59.1mm | 11.4 | 77 |
| September | 22° | 10.9° | 53.8mm | 9.9 | 80 |
| October | 16.3° | 7.4° | 61.4mm | 12.7 | 63 |
| November | 9.6° | 3.3° | 60.4mm | 13.6 | 40 |
| December | 6° | 0.9° | 58.8mm | 15.6 | 24 |
January in Speyer averages a daily high of 5.3°C with nights around -0.4°C. Expect roughly 13.8 wet days totalling 50.4mm. A hard month to visit for comfort alone.
February in Speyer averages a daily high of 8°C with nights around 0.5°C. Expect roughly 12.3 wet days totalling 45.5mm. Demanding conditions — pack for it and plan indoor options.
March in Speyer averages a daily high of 12.3°C with nights around 2.5°C. Expect roughly 12 wet days totalling 47.3mm. Demanding conditions — pack for it and plan indoor options.
April in Speyer averages a daily high of 17.3°C with nights around 5.5°C. Expect roughly 11 wet days totalling 43.3mm. Generally workable, with some weather to plan around.
May in Speyer averages a daily high of 21.4°C with nights around 9.9°C. Expect roughly 12.3 wet days totalling 69.5mm. Comfortable conditions for being outdoors all day.
June in Speyer averages a daily high of 25.4°C with nights around 13.6°C. Expect roughly 11.4 wet days totalling 64.1mm. Comfortable conditions for being outdoors all day.
July in Speyer averages a daily high of 26.9°C with nights around 15.2°C. Expect roughly 12 wet days totalling 66.3mm. Comfortable conditions for being outdoors all day.
August in Speyer averages a daily high of 26.7°C with nights around 15°C. Expect roughly 11.4 wet days totalling 59.1mm. Comfortable conditions for being outdoors all day.
September in Speyer averages a daily high of 22°C with nights around 10.9°C. Expect roughly 9.9 wet days totalling 53.8mm. Comfortable conditions for being outdoors all day.
October in Speyer averages a daily high of 16.3°C with nights around 7.4°C. Expect roughly 12.7 wet days totalling 61.4mm. Generally workable, with some weather to plan around.
November in Speyer averages a daily high of 9.6°C with nights around 3.3°C. Expect roughly 13.6 wet days totalling 60.4mm. Demanding conditions — pack for it and plan indoor options.
December in Speyer averages a daily high of 6°C with nights around 0.9°C. Expect roughly 15.6 wet days totalling 58.8mm. 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. Speyer peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Speyer, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.9°C.
May is the wettest, averaging 69.5mm of rain across roughly 12.3 wet days.
January is the coolest month, with average daily highs around 5.3°C.