Monthly climate guide
Yosemite Valley weather in August
With highs near 27°C (80°F) and lows around 12°C (53°F), August feels warm in Yosemite Valley. Rainfall averages about 4 mm (very dry) and the sky is mostly sunny. Daytime highs are about the same as July and 4°C warmer than September.
What stands out in August
- Afternoons and nights feel like different seasons, roughly 15°C apart.
- Temperatures are falling — expect highs around 4°C lower by September.
- It's one of the sunniest months here, with cloud cover around 17%.
- It's one of the drier months, with about 92% less rain than Yosemite Valley's average.
August is typically Yosemite Valley's warmest month.It's usually the driest month of the year.
Avg high
27°C
80°F
Avg low
12°C
53°F
Rainfall
4 mm
very dry
Humidity
33%
relative
Sky
17%
cloud · mostly sunny
Yosemite Valley weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 5°C / 41°F | -5°C / 22°F | 120 mm | 71% | 51% |
| February | 5°C / 41°F | -6°C / 22°F | 104 mm | 72% | 46% |
| March | 6°C / 43°F | -4°C / 24°F | 119 mm | 77% | 54% |
| April | 11°C / 52°F | -1°C / 30°F | 56 mm | 69% | 45% |
| May | 15°C / 59°F | 2°C / 35°F | 32 mm | 62% | 40% |
| June | 23°C / 73°F | 7°C / 45°F | 10 mm | 45% | 20% |
| July | 27°C / 80°F | 12°C / 53°F | 7 mm | 37% | 18% |
| August | 27°C / 80°F | 12°C / 53°F | 4 mm | 33% | 17% |
| September | 23°C / 73°F | 8°C / 46°F | 7 mm | 39% | 21% |
| October | 18°C / 64°F | 3°C / 37°F | 27 mm | 43% | 24% |
| November | 10°C / 50°F | -1°C / 29°F | 61 mm | 56% | 37% |
| December | 5°C / 41°F | -6°C / 22°F | 80 mm | 67% | 46% |
What to pack for August
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is August a good time to visit Yosemite Valley?
Compare the months in the chart above to find your ideal window.
Best time to visit Yosemite Valley →Other United States cities in August
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Yosemite Valley weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/yosemite-valley/august
<a href="https://weathercompare.eu/weather/usa/yosemite-valley/august">Yosemite Valley weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/yosemite-valley" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Yosemite Valley weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/yosemite-valley/august">Yosemite Valley weather in August</a> – WeatherCompare</p>
Yosemite Valley in August: quick answers
Is August a good time to visit Yosemite Valley?
Yes. August is one of the best months for Yosemite Valley, with highs around 27°C and about 4 mm of rain.
How warm is Yosemite Valley in August?
Average highs are about 27°C (80°F) and average lows about 12°C (53°F), based on 10 years of daily data.
Does it rain a lot in Yosemite Valley in August?
Yosemite Valley typically gets around 4 mm of rain in August — very dry. It's usually the driest month of the year.
Figures are long-term averages for the area around Yosemite Valley (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.