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Ever wondered when the hottest time of the year is where you live? A map from the National Climatic Data Center shows the wide spectrum of when the warmest summer weather is, typically.

Surprisingly, it can vary from as early as June in much of the Southwest to as late as September along the Pacific Coast.

The map is based on past weather data compiled from 1981-2010. "From these values, scientists can identify which day of the year, on average, has the highest maximum temperature, referred to here as the 'warmest day,'" according to the climate center.

Folks in much of Arizona and New Mexico have already endured their worst heat of the year, which usually occurs in late June. Now, and for the next couple of months, rain and clouds from the summer monsoon keep temperatures down (though they're still very hot, usually over 100 degrees).

Along the immediate West Coast, in cities such as San Francisco, San Diego and San Francisco, the pesky cloudy marine layer often keeps temperatures cool through most of the summer before clear skies lead to the warmest month of the year, September. That's also the time of year when wildfires can be at their worst in California.

For much of the remainder of the USA, the year's warmest day tends to occur around now through the rest of July or into early August.

Although we've already had the summer solstice -- the day of the year with the most sunlight, usually around June 20 or 21 --temperatures can continue to warm in many areas since "the rate of heat input from the sun during the day continues to be greater than the cooling at night for several weeks, until temperatures start to descend in late July and early August."

Of course, this is based on typical temperatures based on historic data, so this or any year's actual summer temperatures depend on current weather and climate patterns.

And, speaking of weather. We've received some great weather photos from readers. Take a spin through the most recent below.

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