PHOENIX (AZFamily) — While the temperature trend is going up, humidity has been trending downward lately, you’ve probably felt the dryness in the air!
Dew points measure the amount of moisture in the atmosphere. Here in Arizona, we generally start to notice the humidity when dew points rise into the mid-50s or higher.
Because July occurs during the monsoon, dew points often rise into the upper 50s, 60s, and sometimes, even the 70s. However, the past few days have been quite dry, and we’ve spent quite a bit of time with dew points in the 20s, 30s, and 40s.
As of Monday morning, this month has posted an average dew point of around 50. That’s quite a bit lower than July 2024, when the average dew point was 57. Interestingly, July 2023 was similar to this year, while July 2022 was a bit stickier with an average dew point of 56.
July Humidity in Phoenix(3TV/CBS 5)
Lower dew points indicate that monsoon moisture is scarce, which means rain chances are slim. However, there is a positive side to low dew points; the dry atmosphere allows overnight low temperatures to sink to more comfortable levels. The normal low temperature for this time of year is 85 degrees. Notice how we were three degrees below normal on Sunday morning.
Phoenix Low Temperatures(3TV/CBS 5)
Monday morning’s low was around normal, and we are forecasting a low Tuesday morning that is just above normal. However, notice in the graphic that there are no overnight lows in the 90s; that’s a good thing!
As monsoon moisture tries to work its way back in, the humidity may rise by the middle and end of the week. However, Tuesday still looks fairly dry with dew points forecast in the 30s and 40s.
Tuesday dew points(3TV/CBS 5)
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