| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 13.6° | 4.3° | 69.8mm | 9.8 | 60 |
| February | 16.7° | 5.4° | 51.9mm | 8.4 | 73 |
| March | 19.9° | 7.4° | 43.5mm | 8.2 | 83 |
| April | 23.3° | 9.4° | 24.9mm | 4.6 | 91 |
| May | 27.9° | 12.4° | 15.2mm | 2.9 | 91 |
| June | 32.4° | 15.6° | 3.1mm | 0.8 | 77 |
| July | 35.3° | 17.8° | 0.1mm | 0.1 | 67 |
| August | 34.3° | 17.3° | 0.1mm | 0 | 71 |
| September | 31.7° | 15.3° | 1.5mm | 0.6 | 80 |
| October | 26° | 11° | 14.6mm | 2.2 | 96 |
| November | 18.7° | 6.6° | 27.4mm | 5.7 | 84 |
| December | 13.7° | 4.1° | 65.1mm | 9.7 | 60 |
January in Modesto averages a daily high of 13.6°C with nights around 4.3°C. Expect roughly 9.8 wet days totalling 69.8mm. Generally workable, with some weather to plan around.
February in Modesto averages a daily high of 16.7°C with nights around 5.4°C. Expect roughly 8.4 wet days totalling 51.9mm. Generally workable, with some weather to plan around.
March in Modesto averages a daily high of 19.9°C with nights around 7.4°C. Expect roughly 8.2 wet days totalling 43.5mm. Comfortable conditions for being outdoors all day.
April in Modesto averages a daily high of 23.3°C with nights around 9.4°C. Expect roughly 4.6 wet days totalling 24.9mm. Comfortable conditions for being outdoors all day.
May in Modesto averages a daily high of 27.9°C with nights around 12.4°C. Rain is rare — about 2.9 wet days and 15.2mm across the month. Comfortable conditions for being outdoors all day.
June in Modesto averages a daily high of 32.4°C with nights around 15.6°C. Rain is rare — about 0.8 wet days and 3.1mm across the month. Comfortable conditions for being outdoors all day.
July in Modesto averages a daily high of 35.3°C with nights around 17.8°C. Rain is rare — about 0.1 wet days and 0.1mm across the month. Generally workable, with some weather to plan around.
August in Modesto averages a daily high of 34.3°C with nights around 17.3°C. Rain is rare — about 0 wet days and 0.1mm across the month. Generally workable, with some weather to plan around.
September in Modesto averages a daily high of 31.7°C with nights around 15.3°C. Rain is rare — about 0.6 wet days and 1.5mm across the month. Comfortable conditions for being outdoors all day.
October in Modesto averages a daily high of 26°C with nights around 11°C. Rain is rare — about 2.2 wet days and 14.6mm across the month. Comfortable conditions for being outdoors all day.
November in Modesto averages a daily high of 18.7°C with nights around 6.6°C. Expect roughly 5.7 wet days totalling 27.4mm. Comfortable conditions for being outdoors all day.
December in Modesto averages a daily high of 13.7°C with nights around 4.1°C. Expect roughly 9.7 wet days totalling 65.1mm. 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. Modesto peaks at 96.
Based on 30 years of records, April–May scores highest for comfort in Modesto, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 35.3°C.
January is the wettest, averaging 69.8mm of rain across roughly 9.8 wet days.
January is the coolest month, with average daily highs around 13.6°C.