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Temps? Our plan is to stay at Guitar lake the night before we summit, which would be our highest overnight spot. What can we expect for lows?Try using the
Mt Whitney Weather page links, especially NOAA. I trust the NOAA site far more than the others. You can click the map to get to different parts (and elevations) for your hike.
For actual temps, look at the Cottonwood Lakes, 7-day Temperatures link on the weather page.
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Can you swim in the lakes?Yes. I have.
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Is it worth it to avoid afternoon storms this time of year?Yes. It's not fun to be caught up high in a storm. There is often lightning.
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Is Diamox still recommended?If I were doing your trip, I'd use it for the first 3 days.
