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For my location, record low dewpoints are as follows:
Month Deg C (Deg F) Jan -50 (-58)
Feb -45.1 (-49.2)
Mar -41.7 (-43.1)
Apr -21.4 (-6.5)
May -18.3 (-0.9)
Jun -11.7 (11)
Jul -7.1 (19.2)
Aug -8 (17.6)
Sep -14.4 (6)
Oct -22.8 (-9)
Nov -45.7 (-50.3)
Dec -48.3 (-55)
Location: Live:Downtown Phoenix, AZ/Work:Greater Los Angeles, CA
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I don't know what the records are, but the lowest I've seen the dewpoint go here in Phoenix was -7°F/-21.7°C, and it was newsworthy, 2% humidity airtemp was over 90°F/32.2°C at the time
Lowest dewpoint in the last 10 years is 4F. I don't have the motivation to manually search through every year for a lower one so that's what I'm going for. If I had to guess i'd bet it looks like this.
-15C (I think?) with the temperature being around 27C. And it happened last spring.
I doubt that we had lower dewpoints. But I don't know.
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