Rancho Santa Margarita Climate by Month
Rancho Santa Margarita, California, United States
Hot summers and mild winters, with little rain, mostly from December to March.
Rancho Santa Margarita has hot summers and mild winters, with little rain, mostly from December to March. Afternoon highs range from 67°F (19°C) in February to 89°F (31°C) in August, and December nights average 43°F (6°C). It gets only 13 in (328 mm) of rain a year. May to September are almost completely dry.
- Warmest month
- 89°F(31°C)
- Average high, August
- Coldest nights
- 43°F(6°C)
- Average low, December
- Rain per year
- 13 in(328 mm)
- Wettest: February
- Humidity
- 53%
- Sunniest: July
Best and worst months in Rancho Santa Margarita
Best for weatherThe most comfortable weather comes in May and November, with highs around 74°F (23°C) and about 0.7 in (18 mm) of rain a month.
Least pleasantFebruary and August are the least pleasant; February is the coldest, with highs of only 67°F (19°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Rancho Santa Margarita weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 68°F(20°C) | 44°F(7°C) | 2.4 in(62 mm) | 53% | 2.9 |
| FebFebruary | 67°F(19°C) | 44°F(7°C) | 3.0 in(75 mm) | 53% | 3.4 |
| MarMarch | 69°F(20°C) | 46°F(8°C) | 2.0 in(50 mm) | 56% | 4.9 |
| AprApril | 73°F(23°C) | 48°F(9°C) | 1.0 in(26 mm) | 56% | 5.9 |
| MayMayBest | 74°F(24°C) | 52°F(11°C) | 0.3 in(7 mm) | 60% | 6.3 |
| JunJune | 80°F(27°C) | 56°F(13°C) | 0.1 in(2 mm) | 56% | 6.8 |
| JulJuly | 86°F(30°C) | 60°F(15°C) | 0.1 in(2 mm) | 55% | 6.8 |
| AugAugust | 89°F(31°C) | 62°F(16°C) | 0.1 in(2 mm) | 51% | 6.6 |
| SepSeptember | 86°F(30°C) | 60°F(15°C) | 0.2 in(5 mm) | 55% | 5.5 |
| OctOctober | 81°F(27°C) | 54°F(12°C) | 0.4 in(10 mm) | 48% | 4.2 |
| NovNovemberBest | 74°F(23°C) | 47°F(9°C) | 1.1 in(28 mm) | 44% | 3.3 |
| DecDecember | 67°F(20°C) | 43°F(6°C) | 2.3 in(59 mm) | 47% | 2.7 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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