<story><title>In a first, Phoenix hits 100 straight days of 100-degree heat</title><url>https://www.washingtonpost.com/weather/2024/09/03/phoenix-100-degree-temperatures-record/</url></story><parent_chain><item><author>qiqitori</author><text>Hrm, everyone is different but I wouldn&amp;#x27;t consider living in a place like that.&lt;p&gt;PSA: 100 F is 37.7778C. Here is a relatively simple way to convert Fahrenheit to Celsius in your head. You just need to remember three simple facts:&lt;p&gt;1. 32 F is exactly 0 C. 32 F is a nice round number that most people here probably come across a lot.&lt;p&gt;2. 50 F is exactly 10 C. Again, a nice and round number.&lt;p&gt;3. It&amp;#x27;s a linear relationship.&lt;p&gt;So every 18 F the temperature goes up by 10 C.</text></item></parent_chain><comment><author>Izkata</author><text>The equation is &amp;quot;F = C * 9 &amp;#x2F; 5 + 32&amp;quot;, and reversed, &amp;quot;C = (F - 32) * 5 &amp;#x2F; 9&amp;quot;&lt;p&gt;If you&amp;#x27;re just quickly doing it in your head, &amp;quot;F = C * 2 + 30&amp;quot; and &amp;quot;C = (F - 30) &amp;#x2F; 2&amp;quot; are pretty close.</text></comment>
<story><title>In a first, Phoenix hits 100 straight days of 100-degree heat</title><url>https://www.washingtonpost.com/weather/2024/09/03/phoenix-100-degree-temperatures-record/</url></story><parent_chain><item><author>qiqitori</author><text>Hrm, everyone is different but I wouldn&amp;#x27;t consider living in a place like that.&lt;p&gt;PSA: 100 F is 37.7778C. Here is a relatively simple way to convert Fahrenheit to Celsius in your head. You just need to remember three simple facts:&lt;p&gt;1. 32 F is exactly 0 C. 32 F is a nice round number that most people here probably come across a lot.&lt;p&gt;2. 50 F is exactly 10 C. Again, a nice and round number.&lt;p&gt;3. It&amp;#x27;s a linear relationship.&lt;p&gt;So every 18 F the temperature goes up by 10 C.</text></item></parent_chain><comment><author>foobarian</author><text>Also handy if you live up north, -40C == -40F</text></comment>