Montevideo is warmest in January, averaging 27° by day and 20° at night. The wettest month is April with 114 mm, and the year brings about 942 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 27° | 20° | 102 mm | 24° | 14.1 h | Beach weather |
| February | 26° | 20° | 84 mm | 25° | 13.3 h | Beach weather |
| March | 25° | 18° | 112 mm | 23° | 12.3 h | Mild |
| April | 21° | 16° | 114 mm | 20° | 11.1 h | Mild |
| May | 17° | 13° | 68 mm | 16° | 10.2 h | Sightseeing |
| June | 14° | 10° | 72 mm | 13° | 9.7 h | Mild |
| July | 13° | 8° | 59 mm | 11° | 9.9 h | Mild |
| August | 14° | 9° | 59 mm | 12° | 10.7 h | Mild |
| September | 16° | 11° | 60 mm | 14° | 11.8 h | Sightseeing |
| October | 19° | 13° | 56 mm | 17° | 12.9 h | Sightseeing |
| November | 23° | 16° | 72 mm | 20° | 13.9 h | Sightseeing |
| December | 24° | 18° | 84 mm | 22° | 14.3 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: January and February — highs around 26°, nights no colder than 20°, and at most 102 mm of rain in a month. The sea sits at 24–25° then.
Walking the city: May, September, October, November and December — highs of 16–24° and no more than 84 mm of rain a month.