| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 19.7° | -0.9° | 7.1mm | 1.7 | 91 |
| February | 21.9° | 0.4° | 7.1mm | 1.9 | 94 |
| March | 23.4° | 2.1° | 17.1mm | 3.5 | 93 |
| April | 24.9° | 4.5° | 31.7mm | 6.3 | 87 |
| May | 24.6° | 6.5° | 75mm | 12.1 | 76 |
| June | 22.3° | 8.3° | 149.2mm | 17.3 | 70 |
| July | 21.2° | 8° | 170.2mm | 21.4 | 70 |
| August | 21.5° | 8° | 164.5mm | 20.7 | 70 |
| September | 21.7° | 8.1° | 143.1mm | 16.9 | 70 |
| October | 21.4° | 5° | 47.3mm | 9.3 | 81 |
| November | 21.1° | 2° | 17.6mm | 4.2 | 92 |
| December | 20.3° | -0.5° | 7.2mm | 1.7 | 93 |
January in San Mateo Atenco averages a daily high of 19.7°C with nights around -0.9°C. Rain is rare — about 1.7 wet days and 7.1mm across the month. Comfortable conditions for being outdoors all day.
February in San Mateo Atenco averages a daily high of 21.9°C with nights around 0.4°C. Rain is rare — about 1.9 wet days and 7.1mm across the month. Comfortable conditions for being outdoors all day.
March in San Mateo Atenco averages a daily high of 23.4°C with nights around 2.1°C. Expect roughly 3.5 wet days totalling 17.1mm. Comfortable conditions for being outdoors all day.
April in San Mateo Atenco averages a daily high of 24.9°C with nights around 4.5°C. Expect roughly 6.3 wet days totalling 31.7mm. Comfortable conditions for being outdoors all day.
May in San Mateo Atenco averages a daily high of 24.6°C with nights around 6.5°C. Expect roughly 12.1 wet days totalling 75mm. Comfortable conditions for being outdoors all day.
June in San Mateo Atenco averages a daily high of 22.3°C with nights around 8.3°C. Expect roughly 17.3 wet days totalling 149.2mm. Generally workable, with some weather to plan around.
July in San Mateo Atenco averages a daily high of 21.2°C with nights around 8°C. Expect roughly 21.4 wet days totalling 170.2mm. Generally workable, with some weather to plan around.
August in San Mateo Atenco averages a daily high of 21.5°C with nights around 8°C. Expect roughly 20.7 wet days totalling 164.5mm. Generally workable, with some weather to plan around.
September in San Mateo Atenco averages a daily high of 21.7°C with nights around 8.1°C. Expect roughly 16.9 wet days totalling 143.1mm. Generally workable, with some weather to plan around.
October in San Mateo Atenco averages a daily high of 21.4°C with nights around 5°C. Expect roughly 9.3 wet days totalling 47.3mm. Comfortable conditions for being outdoors all day.
November in San Mateo Atenco averages a daily high of 21.1°C with nights around 2°C. Expect roughly 4.2 wet days totalling 17.6mm. Comfortable conditions for being outdoors all day.
December in San Mateo Atenco averages a daily high of 20.3°C with nights around -0.5°C. Rain is rare — about 1.7 wet days and 7.2mm across the month. 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. San Mateo Atenco peaks at 94.
Based on 30 years of records, November–April scores highest for comfort in San Mateo Atenco, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 24.9°C.
July is the wettest, averaging 170.2mm of rain across roughly 21.4 wet days.
January is the coolest month, with average daily highs around 19.7°C.