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Warm air continues building into the Northeast, although some coastal communities may be tempered by a developing onshore flow. Waltham should remain firmly on the warmer side of that boundary with temperatures pushing well into the 80s under a mix of sunshine and scattered fair weather clouds. • High: 84–88°F | Low: 60–64°F | Wind: SW 10–15 mph • Sky: Mostly sunny • Precipitation: 0%