| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 15.2° | 3.1° | 60.4mm | 8.8 | 67 |
| February | 17.9° | 4.1° | 53.4mm | 7.7 | 78 |
| March | 21.5° | 6.2° | 51.7mm | 6.8 | 86 |
| April | 24.5° | 8° | 31.9mm | 4.3 | 91 |
| May | 29.2° | 11.3° | 12.6mm | 2.5 | 86 |
| June | 33.8° | 14.7° | 1.6mm | 0.4 | 72 |
| July | 37.1° | 18.1° | 0.4mm | 0.1 | 59 |
| August | 36.4° | 16.8° | 0.9mm | 0.3 | 62 |
| September | 33.5° | 14.1° | 1.2mm | 0.4 | 73 |
| October | 27.2° | 9.4° | 12.3mm | 2.1 | 95 |
| November | 20° | 5.1° | 23.5mm | 4.2 | 92 |
| December | 15.1° | 2.2° | 50.2mm | 6.8 | 71 |
January in Porterville averages a daily high of 15.2°C with nights around 3.1°C. Expect roughly 8.8 wet days totalling 60.4mm. Generally workable, with some weather to plan around.
February in Porterville averages a daily high of 17.9°C with nights around 4.1°C. Expect roughly 7.7 wet days totalling 53.4mm. Comfortable conditions for being outdoors all day.
March in Porterville averages a daily high of 21.5°C with nights around 6.2°C. Expect roughly 6.8 wet days totalling 51.7mm. Comfortable conditions for being outdoors all day.
April in Porterville averages a daily high of 24.5°C with nights around 8°C. Expect roughly 4.3 wet days totalling 31.9mm. Comfortable conditions for being outdoors all day.
May in Porterville averages a daily high of 29.2°C with nights around 11.3°C. Rain is rare — about 2.5 wet days and 12.6mm across the month. Comfortable conditions for being outdoors all day.
June in Porterville averages a daily high of 33.8°C with nights around 14.7°C. Rain is rare — about 0.4 wet days and 1.6mm across the month. Generally workable, with some weather to plan around.
July in Porterville averages a daily high of 37.1°C with nights around 18.1°C. Rain is rare — about 0.1 wet days and 0.4mm across the month. Generally workable, with some weather to plan around.
August in Porterville averages a daily high of 36.4°C with nights around 16.8°C. Rain is rare — about 0.3 wet days and 0.9mm across the month. Generally workable, with some weather to plan around.
September in Porterville averages a daily high of 33.5°C with nights around 14.1°C. Rain is rare — about 0.4 wet days and 1.2mm across the month. Generally workable, with some weather to plan around.
October in Porterville averages a daily high of 27.2°C with nights around 9.4°C. Rain is rare — about 2.1 wet days and 12.3mm across the month. Comfortable conditions for being outdoors all day.
November in Porterville averages a daily high of 20°C with nights around 5.1°C. Expect roughly 4.2 wet days totalling 23.5mm. Comfortable conditions for being outdoors all day.
December in Porterville averages a daily high of 15.1°C with nights around 2.2°C. Expect roughly 6.8 wet days totalling 50.2mm. 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. Porterville peaks at 95.
Based on 30 years of records, October–November scores highest for comfort in Porterville, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 37.1°C.
January is the wettest, averaging 60.4mm of rain across roughly 8.8 wet days.
December is the coolest month, with average daily highs around 15.1°C.