Mexicali is warmest in July, averaging 45° by day and 27° at night. The wettest month is March with 19 mm, and the year brings about 85 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 21° | 8° | 16 mm | 10.1 h | Sightseeing |
| February | 23° | 9° | 8 mm | 10.8 h | Sightseeing |
| March | 25° | 12° | 19 mm | 11.8 h | Beach weather |
| April | 32° | 15° | 3 mm | 12.8 h | Beach weather |
| May | 36° | 17° | 0 mm | 13.7 h | Very hot |
| June | 42° | 22° | 0 mm | 14.1 h | Very hot |
| July | 45° | 27° | 6 mm | 13.9 h | Very hot |
| August | 44° | 27° | 9 mm | 13.2 h | Very hot |
| September | 40° | 24° | 9 mm | 12.2 h | Very hot |
| October | 34° | 19° | 3 mm | 11.2 h | Beach weather |
| November | 26° | 13° | 3 mm | 10.3 h | Beach weather |
| December | 22° | 8° | 9 mm | 9.9 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: March, April, October and November — highs around 30°, nights no colder than 12°, and at most 19 mm of rain in a month.
Walking the city: January, February and December — highs of 21–23° and no more than 16 mm of rain a month.
Serious heat: In May, June, July, August and September the average high reaches 45°.