Monsoon 2020 Starts In Phoenix
Since 2008, the monsoon has had fixed start and end dates of June 15th to September 30th. Before these dates were established, the monsoon was defined to have started in Phoenix when the daily average dew point was 55º or higher for three consecutive days.
Over the past three days (July 22nd-24th), Phoenix has recorded a daily average dew point of 55º or higher, so Monsoon 2020 started using the dew point method on July 22nd! The earliest start date was on June 16, 1925 and the latest occurred on July 25, 1987. On average, the start is around July 7th.
Even though this rule is not the "official" way to determine the start of the season, I still like to track it!
Since 2008, the monsoon has had fixed start and end dates of June 15th to September 30th. Before these dates were established, the monsoon was defined to have started in Phoenix when the daily average dew point was 55º or higher for three consecutive days.
Over the past three days (July 22nd-24th), Phoenix has recorded a daily average dew point of 55º or higher, so Monsoon 2020 started using the dew point method on July 22nd! The earliest start date was on June 16, 1925 and the latest occurred on July 25, 1987. On average, the start is around July 7th.
Even though this rule is not the "official" way to determine the start of the season, I still like to track it!