Atascadero Climate by Month
Atascadero, California, United States
Warm summers and cool winters, with most rain from December to March.
Warm summers and cool winters, with most rain from December to March: that's Atascadero's climate in short. August is the warmest month, with highs around 85°F (30°C); December is the coolest at 60°F (16°C), and nights dip to 36°F (2°C). Of the 18 in (467 mm) of rain in a typical year, 77% falls from December to March. June to September are almost completely dry.
- Warmest month
- 85°F(30°C)
- Average high, August
- Coldest nights
- 36°F(2°C)
- Average low, December
- Rain per year
- 18 in(467 mm)
- Wettest: January
- Humidity
- 62%
- Sunniest: June
Best and worst months in Atascadero
Best for weatherMay and October are the best time for weather in Atascadero: highs near 75°F (24°C) and about 0.7 in (18 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 60°F (16°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)
Atascadero weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 60°F(16°C) | 37°F(3°C) | 4.1 in(105 mm) | 69% | 2.4 |
| FebFebruary | 62°F(17°C) | 39°F(4°C) | 3.9 in(99 mm) | 72% | 3.1 |
| MarMarch | 65°F(19°C) | 41°F(5°C) | 3.0 in(76 mm) | 73% | 4.7 |
| AprApril | 69°F(21°C) | 42°F(5°C) | 1.2 in(30 mm) | 67% | 6.0 |
| MayMayBest | 74°F(23°C) | 46°F(8°C) | 0.4 in(11 mm) | 57% | 6.8 |
| JunJune | 80°F(27°C) | 49°F(10°C) | 0.0 in(1 mm) | 53% | 7.5 |
| JulJuly | 84°F(29°C) | 52°F(11°C) | 0.0 in(1 mm) | 55% | 7.2 |
| AugAugust | 85°F(30°C) | 52°F(11°C) | 0.0 in(1 mm) | 54% | 6.7 |
| SepSeptember | 83°F(28°C) | 50°F(10°C) | 0.1 in(2 mm) | 54% | 5.7 |
| OctOctoberBest | 76°F(24°C) | 45°F(7°C) | 0.9 in(24 mm) | 56% | 4.2 |
| NovNovember | 67°F(19°C) | 40°F(4°C) | 1.5 in(37 mm) | 65% | 3.0 |
| DecDecember | 60°F(16°C) | 36°F(2°C) | 3.1 in(80 mm) | 71% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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