Houston vs San Antonio: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 306 km apart · long-term climate normals (NASA POWER, 2001–2020)
San Antonio is the sunnier overall: about 2,599 hours of sunshine a year to Houston's 2,407. San Antonio has the higher Sunshine Score in 9 of 12 months, Houston in 1 (2 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Houston | San Antonio | |
|---|---|---|
| Sunshine hours / year | 2,407 | 2,599 |
| Sunniest month | March (77/100) | February (88/100) |
| Nov–Feb average score | 63/100 | 77/100 |
| Jun–Aug average score | 57/100 | 55/100 |
| Rain / year | 1,246 mm | 779 mm |
| Peak midday UV | 9 (very high) | 10 (very high) |
Houston vs San Antonio month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Houston | San Antonio | Houston | San Antonio | Houston | San Antonio | |
| January | 51 | 64 | 16° | 17° | 89 | 49 |
| February | 67 | 88 | 18° | 20° | 69 | 36 |
| March | 77 | 83 | 22° | 24° | 85 | 61 |
| April | 77 | 83 | 26° | 28° | 87 | 62 |
| May | 71 | 76 | 30° | 32° | 119 | 100 |
| June | 63 | 57 | 33° | 35° | 126 | 71 |
| July | 58 | 57 | 34° | 35° | 110 | 71 |
| August | 49 | 50 | 35° | 36° | 125 | 62 |
| September | 71 | 77 | 32° | 32° | 118 | 95 |
| October | 70 | 80 | 28° | 28° | 128 | 78 |
| November | 76 | 85 | 22° | 22° | 94 | 49 |
| December | 57 | 72 | 17° | 18° | 96 | 45 |
The sunnier month by month: Jan San Antonio · Feb San Antonio · Mar San Antonio · Apr San Antonio · May San Antonio · Jun Houston · Jul even · Aug even · Sep San Antonio · Oct San Antonio · Nov San Antonio · Dec San Antonio.
When to pick which
- November–February: San Antonio (average score 77/100 vs 63). Daytime highs are similar (18°C vs 19°C). See the winter sun ranking.
- March–May: San Antonio (average score 81/100 vs 75). San Antonio is the warmer, around 28°C daytime highs vs 26°C.
- June–August: too close to call — Houston averages 57/100, San Antonio 55/100. Daytime highs are similar (34°C vs 35°C).
- September–October: San Antonio (average score 79/100 vs 71). Daytime highs are similar (30°C vs 30°C).
Full month-by-month guides: Houston weather by month · San Antonio weather by month · Best time to visit United States.
More comparisons: Houston vs Austin · Houston vs Killeen · San Antonio vs Austin · San Antonio vs Corpus Christi · San Antonio vs Killeen · all head-to-heads