| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 10.1° | — | 44.9mm | 4.5 | 59 |
| February | 10.9° | — | 61.9mm | 6.8 | 57 |
| March | 14.1° | — | 119.5mm | 10.7 | 60 |
| April | 19.2° | — | 146.4mm | 11.1 | 75 |
| May | 23.8° | — | 144.2mm | 11.8 | 76 |
| June | 26.3° | — | 184.9mm | 13.1 | 74 |
| July | 30.5° | — | 140.3mm | 13.2 | 60 |
| August | 31.7° | — | 170.1mm | 10.1 | 61 |
| September | 27.8° | — | 220.1mm | 12.9 | 71 |
| October | 22.6° | — | 248.2mm | 11.9 | 76 |
| November | 17.2° | — | 99.2mm | 8.7 | 74 |
| December | 12.5° | — | 60.5mm | 6.2 | 64 |
January in Kasukabe averages a daily high of 10.1°C. Expect roughly 4.5 wet days totalling 44.9mm. Generally workable, with some weather to plan around.
February in Kasukabe averages a daily high of 10.9°C. Expect roughly 6.8 wet days totalling 61.9mm. Generally workable, with some weather to plan around.
March in Kasukabe averages a daily high of 14.1°C. Expect roughly 10.7 wet days totalling 119.5mm. Generally workable, with some weather to plan around.
April in Kasukabe averages a daily high of 19.2°C. Expect roughly 11.1 wet days totalling 146.4mm. Comfortable conditions for being outdoors all day.
May in Kasukabe averages a daily high of 23.8°C. Expect roughly 11.8 wet days totalling 144.2mm. Comfortable conditions for being outdoors all day.
June in Kasukabe averages a daily high of 26.3°C. Expect roughly 13.1 wet days totalling 184.9mm. Generally workable, with some weather to plan around.
July in Kasukabe averages a daily high of 30.5°C. Expect roughly 13.2 wet days totalling 140.3mm. Generally workable, with some weather to plan around.
August in Kasukabe averages a daily high of 31.7°C. Expect roughly 10.1 wet days totalling 170.1mm. Generally workable, with some weather to plan around.
September in Kasukabe averages a daily high of 27.8°C. Expect roughly 12.9 wet days totalling 220.1mm. Generally workable, with some weather to plan around.
October in Kasukabe averages a daily high of 22.6°C. Expect roughly 11.9 wet days totalling 248.2mm. Comfortable conditions for being outdoors all day.
November in Kasukabe averages a daily high of 17.2°C. Expect roughly 8.7 wet days totalling 99.2mm. Generally workable, with some weather to plan around.
December in Kasukabe averages a daily high of 12.5°C. Expect roughly 6.2 wet days totalling 60.5mm. Generally workable, with some weather to plan around.
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. Kasukabe peaks at 76.
Based on 30 years of records, April–June scores highest for comfort in Kasukabe, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 31.7°C.
October is the wettest, averaging 248.2mm of rain across roughly 11.9 wet days.
January is the coolest month, with average daily highs around 10.1°C.