| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.6° | 22.9° | — | — | 72 |
| February | 33° | 23.5° | — | — | 70 |
| March | 33.6° | 24.4° | — | — | 68 |
| April | 34° | 25.3° | — | — | 66 |
| May | 33.4° | 25° | — | — | 68 |
| June | 33° | 24.4° | — | — | 70 |
| July | 33.1° | 24° | — | — | 70 |
| August | 33.2° | 24° | — | — | 69 |
| September | 32.2° | 23.8° | — | — | 73 |
| October | 32.1° | 23.9° | — | — | 74 |
| November | 32.7° | 23.6° | — | — | 71 |
| December | 32.8° | 23.4° | — | — | 71 |
January in Sonsonate averages a daily high of 32.6°C with nights around 22.9°C. Generally workable, with some weather to plan around.
February in Sonsonate averages a daily high of 33°C with nights around 23.5°C. Generally workable, with some weather to plan around.
March in Sonsonate averages a daily high of 33.6°C with nights around 24.4°C. Generally workable, with some weather to plan around.
April in Sonsonate averages a daily high of 34°C with nights around 25.3°C. Generally workable, with some weather to plan around.
May in Sonsonate averages a daily high of 33.4°C with nights around 25°C. Generally workable, with some weather to plan around.
June in Sonsonate averages a daily high of 33°C with nights around 24.4°C. Generally workable, with some weather to plan around.
July in Sonsonate averages a daily high of 33.1°C with nights around 24°C. Generally workable, with some weather to plan around.
August in Sonsonate averages a daily high of 33.2°C with nights around 24°C. Generally workable, with some weather to plan around.
September in Sonsonate averages a daily high of 32.2°C with nights around 23.8°C. Generally workable, with some weather to plan around.
October in Sonsonate averages a daily high of 32.1°C with nights around 23.9°C. Generally workable, with some weather to plan around.
November in Sonsonate averages a daily high of 32.7°C with nights around 23.6°C. Generally workable, with some weather to plan around.
December in Sonsonate averages a daily high of 32.8°C with nights around 23.4°C. 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. Sonsonate peaks at 74.
Based on 30 years of records, Any time of year scores highest for comfort in Sonsonate, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 34°C.
January is the wettest, averaging —mm of rain across roughly — wet days.
October is the coolest month, with average daily highs around 32.1°C.