Monterrey is warmest in May, averaging 31° by day and 15° at night. The wettest month is June with 87 mm, and the year brings about 496 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 21° | 4° | 19 mm | 10.6 h | Sightseeing |
| February | 23° | 7° | 11 mm | 11.1 h | Sightseeing |
| March | 27° | 9° | 9 mm | 11.8 h | Beach weather |
| April | 29° | 12° | 30 mm | 12.6 h | Beach weather |
| May | 31° | 15° | 47 mm | 13.3 h | Beach weather |
| June | 31° | 16° | 87 mm | 13.6 h | Beach weather |
| July | 30° | 16° | 78 mm | 13.5 h | Beach weather |
| August | 30° | 16° | 43 mm | 12.9 h | Beach weather |
| September | 27° | 15° | 87 mm | 12.1 h | Beach weather |
| October | 26° | 12° | 43 mm | 11.4 h | Beach weather |
| November | 24° | 8° | 33 mm | 10.7 h | Sightseeing |
| December | 22° | 6° | 9 mm | 10.4 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, May, June, July, August, September and October — highs around 29°, nights no colder than 9°, and at most 87 mm of rain in a month.
Walking the city: January, February, November and December — highs of 21–24° and no more than 33 mm of rain a month.