| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 20.1° | 7.3° | 54.8mm | 7.3 | 85 |
| February | 20.1° | 7.8° | 71.3mm | 8.8 | 82 |
| March | 20.6° | 8.9° | 38.1mm | 7.2 | 86 |
| April | 21.6° | 9.9° | 16.3mm | 4.5 | 91 |
| May | 22.5° | 12.5° | 8.4mm | 3 | 94 |
| June | 24.1° | 14.4° | 0.8mm | 0.9 | 98 |
| July | 26.8° | 16.7° | 3.6mm | 0.7 | 99 |
| August | 28.1° | 17.4° | 0.4mm | 0.3 | 95 |
| September | 28.2° | 16.8° | 5.5mm | 1.6 | 92 |
| October | 25.3° | 13.2° | 9mm | 3.3 | 93 |
| November | 22.9° | 9.7° | 25.1mm | 5.5 | 89 |
| December | 19.1° | 6.8° | 47.5mm | 8.1 | 81 |
January in Mira Mesa averages a daily high of 20.1°C with nights around 7.3°C. Expect roughly 7.3 wet days totalling 54.8mm. Comfortable conditions for being outdoors all day.
February in Mira Mesa averages a daily high of 20.1°C with nights around 7.8°C. Expect roughly 8.8 wet days totalling 71.3mm. Comfortable conditions for being outdoors all day.
March in Mira Mesa averages a daily high of 20.6°C with nights around 8.9°C. Expect roughly 7.2 wet days totalling 38.1mm. Comfortable conditions for being outdoors all day.
April in Mira Mesa averages a daily high of 21.6°C with nights around 9.9°C. Expect roughly 4.5 wet days totalling 16.3mm. Comfortable conditions for being outdoors all day.
May in Mira Mesa averages a daily high of 22.5°C with nights around 12.5°C. Expect roughly 3 wet days totalling 8.4mm. Comfortable conditions for being outdoors all day.
June in Mira Mesa averages a daily high of 24.1°C with nights around 14.4°C. Rain is rare — about 0.9 wet days and 0.8mm across the month. Comfortable conditions for being outdoors all day.
July in Mira Mesa averages a daily high of 26.8°C with nights around 16.7°C. Rain is rare — about 0.7 wet days and 3.6mm across the month. Comfortable conditions for being outdoors all day.
August in Mira Mesa averages a daily high of 28.1°C with nights around 17.4°C. Rain is rare — about 0.3 wet days and 0.4mm across the month. Comfortable conditions for being outdoors all day.
September in Mira Mesa averages a daily high of 28.2°C with nights around 16.8°C. Rain is rare — about 1.6 wet days and 5.5mm across the month. Comfortable conditions for being outdoors all day.
October in Mira Mesa averages a daily high of 25.3°C with nights around 13.2°C. Expect roughly 3.3 wet days totalling 9mm. Comfortable conditions for being outdoors all day.
November in Mira Mesa averages a daily high of 22.9°C with nights around 9.7°C. Expect roughly 5.5 wet days totalling 25.1mm. Comfortable conditions for being outdoors all day.
December in Mira Mesa averages a daily high of 19.1°C with nights around 6.8°C. Expect roughly 8.1 wet days totalling 47.5mm. 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. Mira Mesa peaks at 99.
Based on 30 years of records, April–October scores highest for comfort in Mira Mesa, balancing daytime temperature against rainfall.
September is the warmest, averaging a daily high of 28.2°C.
February is the wettest, averaging 71.3mm of rain across roughly 8.8 wet days.
December is the coolest month, with average daily highs around 19.1°C.