Piedras Negras vs San Marcos, Texas Climate
67%matchPiedras Negras and San Marcos are a 67% climate match. Compared with Piedras Negras, San Marcos has three times the winter rain, 5°F (3°C) cooler summer days and more humid air.
Piedras Negras gets 19 in (478 mm) of rain a year and San Marcos 36 in (908 mm). August is the warmest month in both, with highs of 101°F (38°C) in Piedras Negras and 97°F (36°C) in San Marcos.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Piedras NegrasSan Marcossolid = high, dashed = low
Rain (in per month)
Piedras NegrasSan Marcos
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Piedras Negras | San Marcos | Piedras Negras | San Marcos | Piedras Negras | San Marcos | |
| Jan | 66°F(19°C) | 63°F(17°C) | 43°F(6°C) | 40°F(4°C) | 0.6 in(16 mm) | 2.4 in(60 mm) |
| Feb | 72°F(22°C) | 67°F(19°C) | 47°F(8°C) | 43°F(6°C) | 0.8 in(21 mm) | 2.4 in(60 mm) |
| Mar | 79°F(26°C) | 73°F(23°C) | 54°F(12°C) | 50°F(10°C) | 0.8 in(20 mm) | 1.9 in(49 mm) |
| Apr | 87°F(31°C) | 80°F(27°C) | 60°F(16°C) | 56°F(14°C) | 1.5 in(39 mm) | 2.5 in(64 mm) |
| May | 94°F(34°C) | 86°F(30°C) | 68°F(20°C) | 65°F(18°C) | 2.4 in(62 mm) | 4.4 in(113 mm) |
| Jun | 99°F(37°C) | 92°F(34°C) | 74°F(23°C) | 72°F(22°C) | 2.0 in(50 mm) | 4.6 in(117 mm) |
| Jul | 100°F(38°C) | 96°F(36°C) | 75°F(24°C) | 74°F(23°C) | 1.9 in(47 mm) | 2.1 in(53 mm) |
| Aug | 101°F(38°C) | 97°F(36°C) | 75°F(24°C) | 73°F(23°C) | 1.4 in(35 mm) | 2.7 in(68 mm) |
| Sep | 94°F(35°C) | 91°F(33°C) | 70°F(21°C) | 68°F(20°C) | 3.4 in(87 mm) | 3.7 in(95 mm) |
| Oct | 86°F(30°C) | 83°F(28°C) | 61°F(16°C) | 58°F(15°C) | 2.0 in(51 mm) | 3.5 in(88 mm) |
| Nov | 75°F(24°C) | 72°F(22°C) | 51°F(11°C) | 48°F(9°C) | 1.3 in(32 mm) | 3.1 in(79 mm) |
| Dec | 67°F(19°C) | 64°F(18°C) | 43°F(6°C) | 41°F(5°C) | 0.7 in(18 mm) | 2.4 in(62 mm) |
1991–2020 averages, by calendar month.