Drought in Toa Alta Municipio, PR: 0.4 years in 10 since 2000

0.4 years in 10

Toa Alta Municipio, PR: 1 of 26 full years had 13+ weeks in drought. Less drought-prone than most US counties.

20002025

Drought years: 2015 (21 wk). Not a single drought week in 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017, 2018, 2019, 2021, 2023, 2024 and 2025.

A regular lawn is fine here; plan for the odd dry year

Real droughts are rare here. A smart controller that skips watering after rain covers the odd dry year.

You can keep a regular lawn. Worth doing: a rain-sensing or smart controller, and deeper, less frequent watering if Jul turns dry.

Against the rest of PR

53rd most drought-prone of 78 PR counties; the PR middle is 0.4 in 10. Closest on the list: Morovis Municipio (0.4 in 10) and Barceloneta Municipio (0.4 in 10). Driest in PR: Salinas Municipio (2.7 in 10). Least drought: Mayaguez Municipio (0 in 10).

When in the year it hits

Most often in Jul (11% of weeks), then Jun (10%) and Sep (9%). Least in Dec (0%). May to September averages 8%.

0 Jan
0 Feb
0 Mar
0 Apr
0 May
10 Jun
11 Jul
8 Aug
9 Sep
6 Oct
1 Nov
0 Dec

The worst year: 2015

2015: 21 weeks in drought, peaking at D3 extreme. Across 1,401 weekly maps: 3.7% of all weeks at D1 or worse, 1.8% at D2, 0.3% at D3, never any D4. Longest unbroken spell: 21 weeks, Jun 2, 2015 to Oct 20, 2015.

Lately

Last drought year: 2015, 21 weeks. 2016-2025: 0 in 10, against 0.6 in 10 for 2000-2015, about the same. So far in 2026: 19 of 44 weeks in drought, through Nov 3, 2026.