| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 20.6° | 4.5° | 47.7mm | 5 | 90 |
| February | 20.3° | 5° | 61.3mm | 6 | 88 |
| March | 22.1° | 6.7° | 34.5mm | 5.4 | 89 |
| April | 24.4° | 8.4° | 14.9mm | 3.3 | 93 |
| May | 26.8° | 11.5° | 4.9mm | 1.3 | 97 |
| June | 30.6° | 14° | 0.4mm | 0.3 | 85 |
| July | 34.4° | 16.5° | 1.5mm | 0.3 | 70 |
| August | 35.2° | 16.5° | 2.7mm | 0.3 | 67 |
| September | 33.4° | 15° | 1.7mm | 0.7 | 73 |
| October | 28.9° | 11.2° | 13.8mm | 2.8 | 87 |
| November | 24.4° | 6.6° | 14.7mm | 4 | 92 |
| December | 20.2° | 4.1° | 37.6mm | 5 | 90 |
January in Eastvale averages a daily high of 20.6°C with nights around 4.5°C. Expect roughly 5 wet days totalling 47.7mm. Comfortable conditions for being outdoors all day.
February in Eastvale averages a daily high of 20.3°C with nights around 5°C. Expect roughly 6 wet days totalling 61.3mm. Comfortable conditions for being outdoors all day.
March in Eastvale averages a daily high of 22.1°C with nights around 6.7°C. Expect roughly 5.4 wet days totalling 34.5mm. Comfortable conditions for being outdoors all day.
April in Eastvale averages a daily high of 24.4°C with nights around 8.4°C. Expect roughly 3.3 wet days totalling 14.9mm. Comfortable conditions for being outdoors all day.
May in Eastvale averages a daily high of 26.8°C with nights around 11.5°C. Rain is rare — about 1.3 wet days and 4.9mm across the month. Comfortable conditions for being outdoors all day.
June in Eastvale averages a daily high of 30.6°C with nights around 14°C. Rain is rare — about 0.3 wet days and 0.4mm across the month. Comfortable conditions for being outdoors all day.
July in Eastvale averages a daily high of 34.4°C with nights around 16.5°C. Rain is rare — about 0.3 wet days and 1.5mm across the month. Generally workable, with some weather to plan around.
August in Eastvale averages a daily high of 35.2°C with nights around 16.5°C. Rain is rare — about 0.3 wet days and 2.7mm across the month. Generally workable, with some weather to plan around.
September in Eastvale averages a daily high of 33.4°C with nights around 15°C. Rain is rare — about 0.7 wet days and 1.7mm across the month. Generally workable, with some weather to plan around.
October in Eastvale averages a daily high of 28.9°C with nights around 11.2°C. Rain is rare — about 2.8 wet days and 13.8mm across the month. Comfortable conditions for being outdoors all day.
November in Eastvale averages a daily high of 24.4°C with nights around 6.6°C. Expect roughly 4 wet days totalling 14.7mm. Comfortable conditions for being outdoors all day.
December in Eastvale averages a daily high of 20.2°C with nights around 4.1°C. Expect roughly 5 wet days totalling 37.6mm. Comfortable conditions for being outdoors all day.
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. Eastvale peaks at 97.
Based on 30 years of records, March–May scores highest for comfort in Eastvale, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 35.2°C.
February is the wettest, averaging 61.3mm of rain across roughly 6 wet days.
December is the coolest month, with average daily highs around 20.2°C.