| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 10.3° | — | 49.2mm | 4.7 | 60 |
| February | 10.9° | — | 70.8mm | 7.5 | 56 |
| March | 14.6° | — | 136.3mm | 10.4 | 62 |
| April | 19.4° | — | 163.7mm | 11.5 | 75 |
| May | 23.5° | — | 162mm | 11.6 | 77 |
| June | 26° | — | 187.9mm | 13.3 | 73 |
| July | 30° | — | 169.1mm | 11.8 | 64 |
| August | 31.4° | — | 124.7mm | 9.6 | 63 |
| September | 27.5° | — | 241.4mm | 12.4 | 73 |
| October | 22.4° | — | 245.2mm | 11.4 | 77 |
| November | 17.5° | — | 110.4mm | 8.9 | 74 |
| December | 12.8° | — | 75.7mm | 6.2 | 65 |
January in Fujisawa averages a daily high of 10.3°C. Expect roughly 4.7 wet days totalling 49.2mm. Generally workable, with some weather to plan around.
February in Fujisawa averages a daily high of 10.9°C. Expect roughly 7.5 wet days totalling 70.8mm. Generally workable, with some weather to plan around.
March in Fujisawa averages a daily high of 14.6°C. Expect roughly 10.4 wet days totalling 136.3mm. Generally workable, with some weather to plan around.
April in Fujisawa averages a daily high of 19.4°C. Expect roughly 11.5 wet days totalling 163.7mm. Comfortable conditions for being outdoors all day.
May in Fujisawa averages a daily high of 23.5°C. Expect roughly 11.6 wet days totalling 162mm. Comfortable conditions for being outdoors all day.
June in Fujisawa averages a daily high of 26°C. Expect roughly 13.3 wet days totalling 187.9mm. Generally workable, with some weather to plan around.
July in Fujisawa averages a daily high of 30°C. Expect roughly 11.8 wet days totalling 169.1mm. Generally workable, with some weather to plan around.
August in Fujisawa averages a daily high of 31.4°C. Expect roughly 9.6 wet days totalling 124.7mm. Generally workable, with some weather to plan around.
September in Fujisawa averages a daily high of 27.5°C. Expect roughly 12.4 wet days totalling 241.4mm. Generally workable, with some weather to plan around.
October in Fujisawa averages a daily high of 22.4°C. Expect roughly 11.4 wet days totalling 245.2mm. Comfortable conditions for being outdoors all day.
November in Fujisawa averages a daily high of 17.5°C. Expect roughly 8.9 wet days totalling 110.4mm. Generally workable, with some weather to plan around.
December in Fujisawa averages a daily high of 12.8°C. Expect roughly 6.2 wet days totalling 75.7mm. 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. Fujisawa peaks at 77.
Based on 30 years of records, April–June scores highest for comfort in Fujisawa, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 31.4°C.
October is the wettest, averaging 245.2mm of rain across roughly 11.4 wet days.
January is the coolest month, with average daily highs around 10.3°C.