If you think Phoenix is hotter now than it used to be, you're right.

This year, the summer months of June, July and August were the fifth-hottest in the city's history, dating to 1895, when daily highs and lows were first recorded.

The record heat shouldn't be a surprise: Six of the eight hottest summers in Phoenix have happened since 2000.

Remember that blistering week in June, from the 19th through the 25th? It was the city's second-hottest seven-day span ever. That trailed only the week in June 1990 that included the city's all-time, one-day high of 122.

Here are five other skin-singeing facts that suggest Phoenix weather has changed decisively in less than a lifetime, and not coincidentally as the city's population mushroomed. All the data comes from the National Oceanic and Atmospheric Administration.

1. We often set new records, but only one kind

Phoenix establishes new all-time records for a handful of the 365 days each year. But overwhelmingly they are record highs.

Since 1980, Phoenix has set three record lows. For example, in 2008, Phoenix reached a record low 64 degrees for Aug. 28.

In the same span, it has set 252 daily record highs. So far, there are nine new records in 2017, such as July 7, when the city hit 118 degrees. That shattered the old mark of 115 degrees for that day set in 1905.

In fact, more than half the daily record lows for Phoenix were set before 1930 and only three came after 1980.

By comparison, more than half the daily record highs have come since 1989. Only 14 daily record highs were set 100 or more years ago.

2. We have an extra month of 100-degree days

Triple-digit days are to be expected in the desert. What's new is the number of them each year.

Between 1900 and 1969, Phoenix averaged 84 100-degree days annually. Since 2000, the city has averaged 113 of them each year. It's like Phoenix added an extra month of summer.

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And it's no fluke: Between 1970 and 1999, the city averaged 105 such days.

Before 1933, Phoenix only had one year with 100 or more 100-degree days, dating to 1895. Now, the city has hit that mark 30 of the past 35 years, including this year.

3. Summer nights aren't as cool

As recently as the 1960s, summer lows still averaged in the mid-70s each night. This year, the city's overnight lows in June, July and August fell below 75 degrees only six times.

At the other extreme, Phoenix had seven nights this summer where the temperature never fell below 90 degrees. To put that in perspective, Phoenix only had two 90-degree nights from 1895 until 1970.

In 2017, Phoenix summer-month overnight lows averaged more than 80 degrees. It was the 19th year in a row it has hit that mark.

4. Extreme heat isn't unusual anymore

It used to be extremely rare that Phoenix would hit 115 degrees. Super-hot days are still uncommon, but in recent years the city has hit that level at least once each summer.

MORE:Extreme Phoenix heat: Is there an upside?

The city has had 117 days in its history where the mercury reached 115 or more. Thirty-six of them have happened since 2000. By contrast, there were 36 readings of 115 or more between 1896 and 1974. It didn't have any between 1908 and 1924.

These days, Phoenix has had at least one day of 115 degrees or more seven years in a row. This year alone, the city had six of those searing days. Only 1974 produced more: seven.

5. Hot weather starts sooner, lasts longer

Triple-digit weather isn't limited to the summer months of June, July and August.

Between 1900 and 1950, Phoenix averaged five 100-degree days each May. Since 1990, the city has averaged nine of them.

It has also reached 100 degrees in April 53 times in the city's history, with more than half of them since 1989. And Phoenix hit 100 degrees once in March in 1988, the only time it has done so to this point.

MORE:How to stay safe in a heat wave

After-summer heat lingers more, too.

September has averaged 18 100-degree days since 1990. Between 1900 and 1925, Phoenix averaged half that many.

Phoenix has hit triple digits in October 49 times in its history. More than half of those, 33, have happened since 2003.

But don't despair about the heat: At least it's not next year.

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