| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.6° | 3.5° | 62.3mm | 9.8 | 63 |
| February | 16.3° | 4.2° | 62.2mm | 9.8 | 69 |
| March | 18.5° | 5.6° | 48.8mm | 9.9 | 75 |
| April | 21° | 7.2° | 26.6mm | 5.5 | 89 |
| May | 24.3° | 9.9° | 11.4mm | 3 | 94 |
| June | 28.6° | 12.4° | 2.2mm | 0.7 | 92 |
| July | 31.4° | 14.1° | 0mm | 0 | 82 |
| August | 31.2° | 14.2° | 0.3mm | 0.2 | 83 |
| September | 29.9° | 13.2° | 2.4mm | 0.8 | 87 |
| October | 25.6° | 10° | 21.2mm | 3 | 94 |
| November | 18.8° | 5.6° | 35.5mm | 7 | 82 |
| December | 14.6° | 3.5° | 75.8mm | 10.1 | 63 |
January in Pleasanton averages a daily high of 14.6°C with nights around 3.5°C. Expect roughly 9.8 wet days totalling 62.3mm. Generally workable, with some weather to plan around.
February in Pleasanton averages a daily high of 16.3°C with nights around 4.2°C. Expect roughly 9.8 wet days totalling 62.2mm. Generally workable, with some weather to plan around.
March in Pleasanton averages a daily high of 18.5°C with nights around 5.6°C. Expect roughly 9.9 wet days totalling 48.8mm. Comfortable conditions for being outdoors all day.
April in Pleasanton averages a daily high of 21°C with nights around 7.2°C. Expect roughly 5.5 wet days totalling 26.6mm. Comfortable conditions for being outdoors all day.
May in Pleasanton averages a daily high of 24.3°C with nights around 9.9°C. Expect roughly 3 wet days totalling 11.4mm. Comfortable conditions for being outdoors all day.
June in Pleasanton averages a daily high of 28.6°C with nights around 12.4°C. Rain is rare — about 0.7 wet days and 2.2mm across the month. Comfortable conditions for being outdoors all day.
July in Pleasanton averages a daily high of 31.4°C with nights around 14.1°C. Rain is rare — about 0 wet days and 0mm across the month. Comfortable conditions for being outdoors all day.
August in Pleasanton averages a daily high of 31.2°C with nights around 14.2°C. Rain is rare — about 0.2 wet days and 0.3mm across the month. Comfortable conditions for being outdoors all day.
September in Pleasanton averages a daily high of 29.9°C with nights around 13.2°C. Rain is rare — about 0.8 wet days and 2.4mm across the month. Comfortable conditions for being outdoors all day.
October in Pleasanton averages a daily high of 25.6°C with nights around 10°C. Expect roughly 3 wet days totalling 21.2mm. Comfortable conditions for being outdoors all day.
November in Pleasanton averages a daily high of 18.8°C with nights around 5.6°C. Expect roughly 7 wet days totalling 35.5mm. Comfortable conditions for being outdoors all day.
December in Pleasanton averages a daily high of 14.6°C with nights around 3.5°C. Expect roughly 10.1 wet days totalling 75.8mm. 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. Pleasanton peaks at 94.
Based on 30 years of records, April–June scores highest for comfort in Pleasanton, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.4°C.
December is the wettest, averaging 75.8mm of rain across roughly 10.1 wet days.
January is the coolest month, with average daily highs around 14.6°C.